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CMS95D Leucadia Blvd WideningHYDROLOGY STUDY FOR LEUCADIA BOULEVARD WIDENING FROM 1 -5 TO SIDONIA STREET Prepared By: Nolte and Associates 5469 Kearny Villa Road, Suite 305 San Diego, CA 92123 Project Number: SD0019 March 25, 1996 ` No. 41,782 TABLE OF CONTENTS SECTION I PAGE 1.0 Introduction ....... ............................... 1 1.1 Purpose of Study ............................... 1 1.2 Scope ......................... ....... ...... 1 2.0 Study Area ........ ............................... 2 2.1 Soil Groups ....................... . ........... 2 2.2 Land Uses ....................... ............ 2 3.0 Hydrology ........ ............................... 2 4.0 Hydraulics ........ ............................... 2 5.0 Conclusions ....... ............................... 2 -3 5.1 Line "A .. .................................... 2 5.2 Line "B" ..... ............................... 3 SECTION II Existing Condition Hydrology Calculations Ultimate Condition Hydrology Calculations SECTION III Precipitation Maps - 10,50,100 -year 6 hour Isopluvials Precipitation Maps - 10,50,100 -year 24 hour Isopluvials Soil Map Existing Condition 1 " =400' Hydrology Map SECTION IV Line "A" Station/Elevation Map (Existing & Proposed) Line "A", "A1", "A2", "A3 ", "A4 ",& "A5" HGL Calculations Caltrans Drainage Unit No. 15 (Ex. Line "B ") Profile Line "B" HGL Calculations Curb Inlet Table Gutter and Roadway Discharge - Velocity Chart Capacity of Curb Opening Inlets Nomogram- Capacity, Curb Inlet at Sag SECTION V Map Pockets Line "A" Ultimate Hydrology Map (1"=80') Line "B" Ultimate Hydrology Map (1 " = 80') Storm Drain Profiles HYDROLOGY STUDY FOR LEUCADIA BOULEVARD WIDENING FROM I -5 TO SIDONIA STREET 1.0 INTRODUCTION 1.1 Purpose of Study This Hydrology Study is the basis for the design of drainage facilities for the widening and realignment of Leucadia Boulevard and Saxony Road. The storm drain system for Lines "A" and "B" are shown on the Hydrology Maps in the map pocket of Section V. 1.2 Scope This study analyzes the 100 year flow in three basins, labeled by the lines that drain them as "A ", "B ", and "C ". This study also analyzes the 10 and 50 year flows for the ultimate Line "A". The proposed storm drain system is designed to intercept and convey the 100 year storm design flows, however, a portion of the existing Line "A" system is only capable of conveying the 10 -year storm. In the event of a larger storm, excess stormwater that is unable to enter Line "A" would continue down Leucadia Boulevard and /or Saxony Road. 2.0 STUDY AREA The existing Line "A" drainage basin at the sump inlets west of Saxony drains approximately 54.9 acres. This drainage is intercepted by a series of curb inlets in the Fox Point subdivision and on Leucadia Boulevard. This drainage is conveyed to Del Rio Avenue via 18, 24, and 36" storm drains with a short reach of open channel at the southwest corner of the Fox Point Subdivision. The proposed improvements would replace this reach with a 36" pipe and add curb inlets in Saxony, Passiflora and Leucadia Boulevard as shown on the map in Section V. The existing Line "B" system at the I -5 northbound off -ramp intersection with Leucadia drains approximately 8.2 acres. This drainage is conveyed to the I -5 median in a 24" pipe and then northerly in a 30" pipe to the confluence with Line "C" drainage basin. The existing Line "C" drainage basin at the Caltrans headwall on Piraeus Street drains - approximately 45.7 acres. This drainage is conveyed to this headwall through open channels and street flows. The existing condition study routed the flows from the north side of Leucadia, down Pireaus to this headwall to simplify the computer model. In reality, a portion of this flow would turn down Ocean View Avenue, where the City has been receiving complaints of flooding during recent years. This drainage is conveyed to the Caltrans system located in the I -5 median in a 36" and 54" pipe, where it confluences with the drainage from the Line "B" drainage basin as well as other areas. 1 Digital topography for the road improvements was prepared by Zenith Aerial in January, 1993. The 400 scale topography was taken from the City's Master Drainage Plan. 2.1 Soil Groups The USGS Soil Map in Section III indicates 5 different types of soil within the study area, but all of them are considered Type "D" soil for hydrological calculations. 2.2 Land Uses The drainage basin for Line "A" and "C" is comprised of medium density residential development. The drainage basin for Line is comprised of a large amount of green houses along with some single family development. A runoff coefficient of 0.55 was used for both types of development. In the analysis of smaller basins consisting of a large amount of impervious area, an appropriate higher runoff coefficient was used. 3.0 HYDROLOGY To develop flows for runoff from design storms, the Rational Method was used according to the County of San Diego Hydrology Manual and Design and Procedure Manual. The AES San Diego County Rational Method Computer Program was used to model the basins and the resultant calculations are provided in Section II. 4.0 HYDRAULICS Hydraulic calculations were prepared using the AES Pipe -Flow Hydraulics computer program. Pipe -Flow calculates the hydraulic grade line for pressure flow and the flow depth for normal and gradually varied flow conditions. Pipe -Flow will calculate the losses occuring in the pipe due to friction, angle, junction confluence, manhole, catch basin entrance, and sudden contraction or expansion losses. Pipe -Flow calculations are included in Section IV. 5.0 CONCLUSIONS 5.1 Line "A" The drainage basin for Line "A" has been increased by 0.5 acres, causing an increase to the 100 year storm of approximately 2.1 cfs, although the ultimate Line "A" study indicates an increase of 25 cfs. This is caused by the difference in initial areas between the two studies, the ultimate analysis being more conservative. The increased area is from Encinitas Ranch, where the high point in the extension of Leucadia Boulevard will be at Quail Gardens Drive approximately 600' easterly of the existing high point at the ranch boundary. This diverts 1.2 acres westerly down Leucadia Blvd., of which 0.5 acres ends up in Line "A" and 0.7 acres ends up in Line "B". It is our opinion that this increase is insignificant. If there is a concern for the diversion of water, Encinitas Ranch PA may be able to install a system that intercepts the diversion and redirects it to its original course. Due to a reduction in the pipe @ Sta. 34 +64.80 (see the map in Section IV), the 50 and 100 year storms can not be conveyed in this system. This effects the entire existing system upstream of this reduction and the proposed lines "A1 " and "A2" . Only the 10- year storm can be conveyed in this system upstream of this reduction. The proposed laterals "Al" and "A2" (and curb inlets) have been designed to convey the 100 year storm to be conservative and in case the downstream line is up -sized in the future. 5.2 Line "B" The drainage basin for Line "B" has been increased by 4.4 acres due to the elimination of the existing high point in Leucadia just west of Del Rio and by the addition of a curb inlet on the north side of Leucadia Boulevard. This causes an increase to the 100 year storm of 6.5 cfs. The hydraulic analysis of the immediate downstream facilities show that they are adequate (see section IV). N: \SDO019 \00 \WP51 \HYDRO.RPT 3 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** RATIONAL METHOD HYDROLOGY COMPUTER PROGRAM PACKAGE Reference: SAN DIEGO COUNTY FLOOD CONTROL DISTRICT 1985,1981 HYDROLOGY MANUAL (c) Copyright 1982 -94 Advanced Engineering Software (aes) Ver. 1.5A Release Date: 3/16/94 License ID 1415 Analysis prepared by: Nolte and Associates, Inc. 5469 Kearny Villa Road, Suite 305 San Diego, CA 92123 * * * * * * * * * * * * * * * * * * * * * * * * ** DESCRIPTION OF STUDY * * * * * * * * * * * * * * * * * * * * * * * * ** • LEUCADIA BLVD • EXISTING CONDITION 100 YR ANALYSIS • LINE A ******************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FILE NAME: EXLINEA.DAT TIME /DATE OF STUDY: 16:26 1/31/1996 ---------------------------------------------------------------------------- USER SPECIFIED HYDROLOGY AND HYDRAULIC MODEL INFORMATION: ---------------------------------------------------------------------------- 1985 SAN DIEGO MANUAL CRITERIA USER SPECIFIED STORM EVENT(YEAR) = 100.00 6 -HOUR DURATION PRECIPITATION (INCHES) = 2.600 SPECIFIED MINIMUM PIPE SIZE(INCH) = 18.00 SPECIFIED PERCENT OF GRADIENTS(DECIMAL) TO USE FOR FRICTION SLOPE _ .90 SAN DIEGO HYDROLOGY MANUAL "C "- VALUES USED NOTE: ONLY PEAK CONFLUENCE VALUES CONSIDERED ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 1.00 TO NODE 1.10 IS CODE = 21 ---------------------------------------------------------------------------- >> >>> RATIONAL METHOD INITIAL SUBAREA ANALYSIS<< <<< ---------------------------------------------------------------------------- ---------------------------------------------------------------------------- SOIL CLASSIFICATION IS "D" SINGLE FAMILY DEVELOPMENT RUNOFF COEFFICIENT = .5500 INITIAL SUBAREA FLOW - LENGTH = 650.00 UPSTREAM ELEVATION = 310.00 DOWNSTREAM ELEVATION = 294.00 ELEVATION DIFFERENCE = 16.00 URBAN SUBAREA OVERLAND TIME OF FLOW(MINUTES) = 18.694 *CAUTION: SUBAREA FLOWLENGTH EXCEEDS COUNTY NOMOGRAPH DEFINITION. EXTRAPOLATION OF NOMOGRAPH USED. 100 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.926 SUBAREA RUNOFF(CFS) = 9.01 TOTAL AREA(ACRES) = 5.60 TOTAL RUNOFF(CFS) = 9.01 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 1.10 TO NODE 2.00 IS CODE = 4 ---------------------------------------------------------------------------- >> >>>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<< <<< >> >>>USING USER - SPECIFIED PIPESIZE« <<< DEPTH OF FLOW IN 18.0 INCH PIPE IS 7.2 INCHES PIPEFLOW VELOCITY(FEET /SEC.) = 13.8 UPSTREAM NODE ELEVATION = 288.00 DOWNSTREAM NODE ELEVATION = 274.00 FLOWLENGTH(FEET) = 190.00 MANNING'S N = .013 GIVEN PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 9.01 TRAVEL TIME(MIN.) = .23 TC(MIN.) = 18.92 FLOW PROCESS FROM NODE 2.00 TO NODE 2.00 IS CODE = 8 ---------------------------------------------------------------------- - - - - -- >> >>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<< <<< -------- - - - - -- 100 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.903 SOIL CLASSIFICATION IS "D" SINGLE FAMILY DEVELOPMENT RUNOFF COEFFICIENT = .5500 SUBAREA AREA(ACRES) = 2.30 SUBAREA RUNOFF(CFS) = 3.67 TOTAL AREA(ACRES) = 7.90 TOTAL RUNOFF(CFS) = 12.69 TC(MIN) = 18.92 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 2.00 TO NODE 3.00 IS CODE = 4 ---------------------------------------------------------------------- - - - - -- >> >>>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<< <<< >> >>>USING USER - SPECIFIED PIPESIZE« <<< DEPTH OF FLOW IN 18.0 INCH PIPE IS 8.3 INCHES PIPEFLOW VELOCITY(FEET /SEC.) = 16.0 UPSTREAM NODE ELEVATION = 274.00 DOWNSTREAM NODE ELEVATION = 234.00 FLOWLENGTH(FEET) = 465.00 MANNING'S N = .013 GIVEN PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 12.69 TRAVEL TIME(MIN.) = .49 TC(MIN.) = 19.41 FLOW PROCESS FROM NODE 3.00 TO NODE 3.00 IS CODE = 8 ---------------------------------------------------------------------- - - - - -- >> >>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<< <<< 100 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.856 SOIL CLASSIFICATION IS "D" SINGLE FAMILY DEVELOPMENT RUNOFF COEFFICIENT = .5500 SUBAREA AREA(ACRES) = 8.90 SUBAREA RUNOFF(CFS) = 13.98 TOTAL AREA(ACRES) = 16.80 TOTAL RUNOFF(CFS) = 26.67 TC(MIN) = 19.41 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 3.00 TO NODE 4.00 IS CODE = 4 ---------------------------------------------------------------------------- >> >>>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<< <<< >> >>>USING USER - SPECIFIED PIPESIZE« <<< PIPEFLOW VELOCITY(FEET /SEC.) UPSTREAM NODE ELEVATION = DOWNSTREAM NODE ELEVATION = FLOWLENGTH(FEET) = 365.00 GIVEN PIPE DIAMETER(INCH) _ PIPEFLOW THRU SUBAREA(CFS) = TRAVEL TIME(MIN.) _ .40 = 15.1 234.00 208.00 MANNING'S N = .013 18.00 NUMBER OF PIPES = 26.67 TC(MIN.) = 19.81 1 FLOW PROCESS FROM NODE 4.00 TO NODE 4.00 IS CODE = 8 ---------------------------------------------------------------------- - - - - -- >> >>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<< <<< 100 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.818 SOIL CLASSIFICATION IS "D" SINGLE FAMILY DEVELOPMENT RUNOFF COEFFICIENT = .5500 SUBAREA AREA(ACRES) = 17.00 SUBAREA RUNOFF(CFS) = 26.35 TOTAL AREA(ACRES) = 33.80 TOTAL RUNOFF(CFS) = 53.02 TC(MIN) = 19.81 FLOW PROCESS FROM NODE 4.00 TO NODE 5.00 IS CODE = 4 ---------------------------------------------------------------------- - - - - -- >> >>>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<< <<< >> >>>USING USER - SPECIFIED PIPESIZE« <<< DEPTH OF FLOW IN 36.0 INCH PIPE IS 14.1 INCHES PIPEFLOW VELOCITY(FEET /SEC.) = 20.6 UPSTREAM NODE ELEVATION = 207.00 DOWNSTREAM NODE ELEVATION = 199.00 FLOWLENGTH(FEET) = 120.00 MANNING'S N = .013 GIVEN PIPE DIAMETER(INCH) = 36.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 53.02 TRAVEL TIME(MIN.) _ .10 TC(MIN.) = 19.91 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 5.00 TO NODE 5.00 IS CODE = 8 --------------------------------------------------------------------- - - - - -- >> >>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<< <<< ---------------------------------------------------------------------------- ---------------------------------------------------------------------------- 100 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.810 SOIL CLASSIFICATION IS "D" SINGLE FAMILY DEVELOPMENT RUNOFF COEFFICIENT = .5500 SUBAREA AREA(ACRES) = 9.30 SUBAREA RUNOFF(CFS) = 14.37 TOTAL AREA(ACRES) = 43.10 TOTAL RUNOFF(CFS) = 67.39 TC(MIN) = 19.91 FLOW PROCESS FROM NODE 5.00 TO NODE 6.00 IS CODE = 4 --------------------------------------------------------------------------- >> >>>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<< <<< >> >>>USING USER - SPECIFIED PIPESIZE« <<< DEPTH OF FLOW IN 36.0 INCH PIPE IS 22.9 INCHES PIPEFLOW VELOCITY(FEET /SEC.) = 14.2 UPSTREAM NODE ELEVATION = 199.00 DOWNSTREAM NODE ELEVATION = 193.00 FLOWLENGTH(FEET) = 283.00 MANNING'S N = .013 GIVEN PIPE DIAMETER(INCH) = 36.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 67.39 TRAVEL TIME(MIN.) = .33 TC(MIN.) = 20.24 FLOW PROCESS FROM NODE 6.00 TO NODE 6.00 IS CODE = 8 ---------------------------------------------------------------------------- >> >>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<< <<< 100 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.780 SOIL CLASSIFICATION IS "D" SINGLE FAMILY DEVELOPMENT RUNOFF COEFFICIENT = .5500 SUBAREA AREA(ACRES) = 11.80 SUBAREA RUNOFF(CFS) = 18.04 TOTAL AREA(ACRES) = 54.90 TOTAL RUNOFF(CFS) = 85.43 TC(MIN) = 20.24 END OF STUDY SUMMARY: PEAK FLOW RATE(CFS) = 85.43 Tc(MIN.) = 20.24 TOTAL AREA(ACRES) = 54.90 END OF RATIONAL METHOD ANALYSIS ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** RATIONAL METHOD HYDROLOGY COMPUTER PROGRAM PACKAGE Reference: SAN DIEGO COUNTY FLOOD CONTROL DISTRICT 1985,1981 HYDROLOGY MANUAL (c) Copyright 1982 -94 Advanced Engineering Software (aes) Ver. 1.5A Release Date: 3/16/94 License ID 1415 Analysis prepared by: Nolte and Associates, Inc. 5469 Kearny Villa Road, Suite 305 San Diego, CA 92123 * * * * * * * * * * * * * * * * * * * * * * * * ** DESCRIPTION OF STUDY * * * * * * * * * * * * * * * * * * * * * * * * ** * LEUCADIA BLVD * EXISTING CONDITION 100 YR ANALYSIS * LINE B (CALTRANS DRAINAGE UNIT NO. 15) ******************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FILE NAME: EXLINEB.DAT TIME /DATE OF STUDY: 17:46 1/31/1996 ---------------------------------------------------------------------------- USER SPECIFIED HYDROLOGY AND HYDRAULIC MODEL INFORMATION: ---------------------------------------------------------------------------- 1985 SAN DIEGO MANUAL CRITERIA USER SPECIFIED STORM EVENT(YEAR) = 100.00 6 -HOUR DURATION PRECIPITATION (INCHES) = 2.600 SPECIFIED MINIMUM PIPE SIZE(INCH) = 18.00 SPECIFIED PERCENT OF GRADIENTS(DECIMAL) TO USE FOR FRICTION SLOPE _ .90 SAN DIEGO HYDROLOGY MANUAL "C "- VALUES USED NOTE: ONLY PEAK CONFLUENCE VALUES CONSIDERED FLOW PROCESS FROM NODE 21.00 TO NODE 21.10 IS CODE = 21 ---------------------------------------------------------------------------- >> >>> RATIONAL METHOD INITIAL SUBAREA ANALYSIS<< <<< ---------------------------------------------------------------------------- ---------------------------------------------------------------------------- SOIL CLASSIFICATION IS "D" SINGLE FAMILY DEVELOPMENT RUNOFF COEFFICIENT = .5500 INITIAL SUBAREA FLOW - LENGTH = 850.00 UPSTREAM ELEVATION = 206.00 DOWNSTREAM ELEVATION = 185.00 ELEVATION DIFFERENCE = 21.00 URBAN SUBAREA OVERLAND TIME OF FLOW(MINUTES) = 21.351 *CAUTION: SUBAREA FLOWLENGTH EXCEEDS COUNTY NOMOGRAPH DEFINITION. EXTRAPOLATION OF NOMOGRAPH USED. 100 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.686 SUBAREA RUNOFF(CFS) = 4.14 TOTAL AREA(ACRES) = 2.80 TOTAL RUNOFF(CFS) = 4.14 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 21.10 TO NODE 22.00 IS CODE = 6 ---------------------------------------------------------------------------- >> >>>COMPUTE STREETFLOW TRAVELTIME THRU SUBAREA<< <<< UPSTREAM ELEVATION = 185.00 DOWNSTREAM ELEVATION = 170.00 STREET LENGTH(FEET) = 650.00 CURB HEIGHT(INCHES) = 6. STREET HALFWIDTH(FEET) = 15.00 DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK = 13.00 INTERIOR STREET CROSSFALL(DECIMAL) _ .020 OUTSIDE STREET CROSSFALL(DECIMAL) _ .020 SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1 * *TRAVELTIME COMPUTED USING MEAN FLOW(CFS) = 8.84 STREETFLOW MODEL RESULTS: STREET FLOWDEPTH(FEET) _ .42 HALFSTREET FLOODWIDTH(FEET) = 14.58 AVERAGE FLOW VELOCITY(FEET /SEC.) = 3.94 PRODUCT OF DEPTH &VELOCITY = 1.65 STREETFLOW TRAVELTIME(MIN) = 2.75 TC(MIN) = 24.10 100 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.484 SOIL CLASSIFICATION IS "D" MULTI -UNITS DEVELOPMENT RUNOFF COEFFICIENT = .7000 SUBAREA AREA(ACRES) = 5.40 SUBAREA RUNOFF(CFS) = 9.39 SUMMED AREA(ACRES) = 8.20 TOTAL RUNOFF(CFS) = 13.53 END OF SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) _ .43 HALFSTREET FLOODWIDTH(FEET) = 15.00 FLOW VELOCITY(FEET /SEC.) = 4.31 DEPTH *VELOCITY = 1.84 END OF STUDY SUMMARY: PEAK FLOW RATE(CFS) = 13.53 Tc(MIN.) = 24.10 _. TOTAL AREA(ACRES) = 8.20 END OF RATIONAL METHOD ANALYSIS RATIONAL METHOD HYDROLOGY COMPUTER PROGRAM PACKAGE Reference: SAN DIEGO COUNTY FLOOD CONTROL DISTRICT 1985,1981 HYDROLOGY MANUAL (c) Copyright 1982 -94 Advanced Engineering Software (aes) Ver. 1.5A Release Date: 3/16/94 License ID 1415 Analysis prepared by: Nolte and Associates, Inc. 5469 Kearny Villa Road, Suite 305 San Diego, CA 92123 * * * * * * * * * * * * * * * * * * * * * * * * ** DESCRIPTION OF STUDY * * * * * * * * * * * * * * * * * * * * * * * * ** * LEUCADIA BLVD * EXISTING CINDITION 100 YR ANALYSIS * LINE C ******************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FILE NAME: EXLINEC.DAT TIME /DATE OF STUDY: 17:47 1/31/1996 ---------------------------------------------------------------------- - - - - -- USER SPECIFIED HYDROLOGY AND HYDRAULIC MODEL INFORMATION: 1985 SAN DIEGO MANUAL CRITERIA USER SPECIFIED STORM EVENT(YEAR) = 100.00 6 -HOUR DURATION PRECIPITATION (INCHES) = 2.600 SPECIFIED MINIMUM PIPE SIZE(INCH) = 18.00 SPECIFIED PERCENT OF GRADIENTS(DECIMAL) TO USE FOR FRICTION SLOPE _ .90 SAN DIEGO HYDROLOGY MANUAL "C "- VALUES USED NOTE: ONLY PEAK CONFLUENCE VALUES CONSIDERED FLOW PROCESS FROM NODE 11.00 TO NODE 11.10 IS CODE = 21 ---------------------------------------------------------------------- - - - - -- >> >>> RATIONAL METHOD INITIAL SUBAREA ANALYSIS<< <<< SOIL CLASSIFICATION IS "D" SINGLE FAMILY DEVELOPMENT RUNOFF COEFFICIENT = .5500 INITIAL SUBAREA FLOW- LENGTH = 850.00 UPSTREAM ELEVATION = 215.00 DOWNSTREAM ELEVATION = 190.00 ELEVATION DIFFERENCE = 25.00 URBAN SUBAREA OVERLAND TIME OF FLOW(MINUTES) = 20.146 *CAUTION: SUBAREA SLOPE EXCEEDS COUNTY NOMOGRAPH DEFINITION. EXTRAPOLATION OF NOMOGRAPH USED. *CAUTION: SUBAREA FLOWLENGTH EXCEEDS COUNTY NOMOGRAPH DEFINITION. EXTRAPOLATION OF NOMOGRAPH USED. 100 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.788 SUBAREA RUNOFF(CFS) = 3.68 TOTAL AREA(ACRES) = 2.40 TOTAL RUNOFF(CFS) = 3.68 * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE ------------------------- >> >>>COMPUTE STREETFLOW UPSTREAM ELEVATION = STREET LENGTH(FEET) _ STREET HALFWIDTH(FEET) k******************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** 11.10 TO NODE 12.00 IS CODE = 6 --------------------------------------------------- TRAVELTIME THRU SUBAREA<< <<< 190.00 DOWNSTREAM ELEVATION = 173.00 750.00 CURB HEIGHT(INCHES) = 6. 15.00 DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK = 13.00 INTERIOR STREET CROSSFALL(DECIMAL) = .020 OUTSIDE STREET CROSSFALL(DECIMAL) = .020 SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1 * *TRAVELTIME COMPUTED USING MEAN FLOW(CFS) = 5.06 STREETFLOW MODEL RESULTS: STREET FLOWDEPTH(FEET) _ .35 HALFSTREET FLOODWIDTH(FEET) = 11.20 AVERAGE FLOW VELOCITY(FEET /SEC.) = 3.69 PRODUCT OF DEPTH &VELOCITY = 1.29 STREETFLOW TRAVELTIME(MIN) = 3.39 TC(MIN) = 23.54 100 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.522 SOIL CLASSIFICATION IS "D" COMMERCIAL DEVELOPMENT RUNOFF COEFFICIENT = .8500 SUBAREA AREA(ACRES) = 1.30 SUBAREA RUNOFF(CFS) = 2.79 SUMMED AREA(ACRES) = 3.70 TOTAL RUNOFF(CFS) = 6.47 END OF SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) = .38 HALFSTREET FLOODWIDTH(FEET) = 12.89 FLOW VELOCITY(FEET /SEC.) = 3.63 DEPTH *VELOCITY = 1.40 FLOW PROCESS FROM NODE ------------------------- >> >>>COMPUTE STREETFLOW UPSTREAM ELEVATION = STREET LENGTH(FEET) _ STREET HALFWIDTH(FEET) 12.00 TO NODE 14.00 IS CODE = 6 --------------------------------------------------- TRAVELTIME THRU SUBAREA<< <<< 173.00 DOWNSTREAM ELEVATION = 140.00 900.00 CURB HEIGHT(INCHES) = 6. = 24.00 DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK = 22.00 INTERIOR STREET CROSSFALL(DECIMAL) = .020 OUTSIDE STREET CROSSFALL(DECIMAL) = .020 SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1 * *TRAVELTIME COMPUTED USING MEAN FLOW(CFS) = 7.02 STREETFLOW MODEL RESULTS: STREET FLOWDEPTH(FEET) _ .36 HALFSTREET FLOODWIDTH(FEET) = 11.70 AVERAGE FLOW VELOCITY(FEET /SEC.) = 4.72 PRODUCT OF DEPTH &VELOCITY = 1.70 STREETFLOW TRAVELTIME(MIN) = 3.18 TC(MIN) = 26.71 100 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.324 SOIL CLASSIFICATION IS "D" INDUSTRIAL DEVELOPMENT RUNOFF COEFFICIENT = .9500 SUBAREA AREA(ACRES) = .50 SUBAREA RUNOFF(CFS) = 1.10 SUMMED AREA(ACRES) = 4.20 TOTAL RUNOFF(CFS) = 7.57 END OF SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) = .37 HALFSTREET FLOODWIDTH(FEET) = 12.40 FLOW VELOCITY(FEET /SEC.) = 4.57 DEPTH *VELOCITY = 1.71 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 14.00 TO NODE 14.00 IS CODE = 1 ---------------------------------------------------------------------------- >> >>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE« <<< TOTAL NUMBER OF STREAMS = 2 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE: TIME OF CONCENTRATION(MIN.) = 26.71 RAINFALL INTENSITY(INCH /HR) = 2.32 TOTAL STREAM AREA(ACRES) = 4.20 PEAK FLOW RATE(CFS) AT CONFLUENCE = 7.57 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 13.00 TO NODE 13.10 IS CODE = 21 ---------------------------------------------------------------------------- >> >>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<< <<< SOIL CLASSIFICATION IS "D" SINGLE FAMILY DEVELOPMENT RUNOFF COEFFICIENT = .5500 INITIAL SUBAREA FLOW - LENGTH = 1200.00 UPSTREAM ELEVATION = 240.00 DOWNSTREAM ELEVATION = 175.00 ELEVATION DIFFERENCE = 65.00 URBAN SUBAREA OVERLAND TIME OF FLOW(MINUTES) = 19.529 *CAUTION: SUBAREA SLOPE EXCEEDS COUNTY NOMOGRAPH DEFINITION. EXTRAPOLATION OF NOMOGRAPH USED. *CAUTION: SUBAREA FLOWLENGTH EXCEEDS COUNTY NOMOGRAPH DEFINITION. EXTRAPOLATION OF NOMOGRAPH USED. 100 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.845 SUBAREA RUNOFF(CFS) = 33.17 TOTAL AREA(ACRES) = 21.20 TOTAL RUNOFF(CFS) = 33.17 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 13.10 TO NODE 14.00 IS CODE = 51 >> >>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<< <<< >> >>>TRAVELTIME THRU SUBAREA<< <<< UPSTREAM NODE ELEVATION = 175.00 DOWNSTREAM NODE ELEVATION = 140.00 CHANNEL LENGTH THRU SUBAREA(FEET) = 950.00 CHANNEL SLOPE = .0368 CHANNEL BASE(FEET) = .00 "Z" FACTOR = 2.000 MANNING'S FACTOR = .015 MAXIMUM DEPTH(FEET) = 2.00 CHANNEL FLOW THRU SUBAREA(CFS) = 33.17 FLOW VELOCITY(FEET /SEC) = 12.27 FLOW DEPTH(FEET) = 1.16 TRAVEL TIME(MIN.) = 1.29 TC(MIN.) = 20.82 r******************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 14.00 TO NODE 14.00 IS CODE = 8 ---------------------------------------------------------------------- - - - - -- ' oov =11 L dVw AuoiouaAH N01110NOO JNIISIX3 1_0 AL.. allVA31nos viavon3l _1 PER' C6, em1w ,� ol Aull fo 0, Ml;p. 4 il�6 WA 49 'TOW Vlj 0- ZIA •� : It. NSA. AL-4 s 4F 14� V V4— A 161.,l Awl 4WD IT, L 1, -1 7- W if -7 Ag 44,0 51, 4911 fluo Al t 4L -Ar .4 VIA, IW. 13 AVOO�O bb O 8 :X l g i s O 1010 9i V�101�Issvd d � 8 �v Q Q U D w R J G IS O a ,Rl xm G 8 w yt (Kozz) m x (99'612), 8 x dG SNVBIV '1S 8 ani 3L3tlJiiU�_ O R LL 66 +6 Y1S A =ig N � W O < i 8 R1 at [9t61 NI yC (MC61) uN +o ,no K (00'C6l) A �, 8 NI }1 (11'601) N11 LOnN15N009N O SL'SL +BL Y1S g� S Lj 1110 9f (L19 011 1�1 6T{��ZC O n o n� W Y rA '§S C Ev 0 )R Z— NI C 9l'16l + n �*� r aa3 b V CI I A V ,9C (Vf 161) - �_NNOO dONO O 10 L9'YC +IC 8 n $v R 8 ani 3L3tlJiiU�_ O R LL 66 +6 Y1S O N � W O > >>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<< <<< 100 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.730 SOIL CLASSIFICATION IS "D" SINGLE FAMILY DEVELOPMENT RUNOFF COEFFICIENT = .5500 SUBAREA AREA(ACRES) = 20.30 SUBAREA RUNOFF(CFS) = 30.48 TOTAL AREA(ACRES) = 41.50 TOTAL RUNOFF(CFS) = 63.65 TC(MIN) = 20.82 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 14.00 TO NODE 14.00 IS CODE = 1 ----------------------------------------- >> >>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE« <<< >> >>>AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES<< <<< TOTAL NUMBER OF STREAMS = 2 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE: TIME OF CONCENTRATION(MIN.) = 20.82 RAINFALL INTENSITY(INCH /HR) = 2.73 TOTAL STREAM AREA(ACRES) = 41.50 PEAK FLOW RATE(CFS) AT CONFLUENCE = 63.65 ** CONFLUENCE DATA ** STREAM RUNOFF Tc INTENSITY AREA NUMBER (CFS) (MIN.) (INCH /HOUR) (ACRE) 1 7.57 26.71 2.324 4.20 2 63.65 20.82 2.730 41.50 RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO CONFLUENCE FORMULA USED FOR 2 STREAMS. ** PEAK FLOW RATE TABLE ** STREAM RUNOFF Tc INTENSITY NUMBER (CFS) (MIN.) (INCH /HOUR) 1 70.10 20.82 2.730 2 61.77 26.71 2.324 COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS: PEAK FLOW RATE(CFS) = 70.10 Tc(MIN.) = 20.82 TOTAL AREA(ACRES) = 45.70 END OF STUDY SUMMARY: PEAK FLOW RATE(CFS) = 70.10 Tc(MIN.) = 20.82 TOTAL AREA(ACRES) = 45.70 END OF RATIONAL METHOD ANALYSIS RATIONAL METHOD HYDROLOGY COMPUTER PROGRAM PACKAGE Reference: SAN DIEGO COUNTY FLOOD CONTROL DISTRICT 1985,1981 HYDROLOGY MANUAL (c) Copyright 1982 -94 Advanced Engineering Software (aes) Ver. 1.5A Release Date: 3/16/94 License ID 1415 Analysis prepared by: Nolte and Associates, Inc. 5469 Kearny Villa Road, Suite 305 San Diego, CA 92123 * * * * * * * * * * * * * * * * * * * * * * * * ** DESCRIPTION OF STUDY * * * * * * * * * * * * * * * * * * * * * * * * ** • LEUCADIA BLVD • ULTIMATE CONDITION 10 YR ANALYSIS • LINES Al, A2, A3, A4, & A5 ******************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FILE NAME: LINEA.DAT TIME /DATE OF STUDY: 8:22 3/27/1996 ---------------------------------------------- USER SPECIFIED HYDROLOGY AND HYDRAULIC MODEL INFORMATION: -------------------------------------------- 1985 SAN DIEGO MANUAL CRITERIA USER SPECIFIED STORM EVENT(YEAR) = 10.00 6 -HOUR DURATION PRECIPITATION (INCHES) = 1.750 SPECIFIED MINIMUM PIPE SIZE(INCH) = 18.00 SPECIFIED PERCENT OF GRADIENTS(DECIMAL) TO USE FOR FRICTION SLOPE _ .90 SAN DIEGO HYDROLOGY MANUAL "C "- VALUES USED NOTE: ONLY PEAK CONFLUENCE VALUES CONSIDERED ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 1.00 TO NODE 1.10 IS CODE = 21 ---------------------------------------------- >> >>> RATIONAL METHOD INITIAL SUBAREA ANALYSIS<< <<< SOIL CLASSIFICATION IS "D" COMMERCIAL DEVELOPMENT RUNOFF COEFFICIENT = .8500 INITIAL SUBAREA FLOW - LENGTH = 540.00 UPSTREAM ELEVATION = 317.00 DOWNSTREAM ELEVATION = 306.00 ELEVATION DIFFERENCE = 11.00 URBAN SUBAREA OVERLAND TIME OF FLOW(MINUTES) = 8.249 *CAUTION: SUBAREA FLOWLENGTH EXCEEDS COUNTY NOMOGRAPH DEFINITION. EXTRAPOLATION OF NOMOGRAPH USED. 10 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.338 SUBAREA RUNOFF(CFS) = 1.99 TOTAL AREA(ACRES) = .70 TOTAL RUNOFF(CFS) = 1.99 FLOW PROCESS FROM NODE 1.10 TO NODE 1.20 IS CODE = 6 ------------------------------------------ >> >>>COMPUTE STREETFLOW TRAVELTIME THRU SUBAREA<< <<< ---------------------- -------------------- UPSTREAM ELEVATION = 306.00 DOWNSTREAM ELEVATION = 280.00 STREET LENGTH(FEET) = 470.00 CURB HEIGHT(INCHES) = 6. STREET HALFWIDTH(FEET) = 40.00 DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK = 38.50 INTERIOR STREET CROSSFALL(DECIMAL) _ .020 OUTSIDE STREET CROSSFALL(DECIMAL) _ .087 SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1 * *TRAVELTIME COMPUTED USING MEAN FLOW(CFS) = 4.14 STREETFLOW MODEL RESULTS: STREET FLOWDEPTH(FEET) _ .29 HALFSTREET FLOODWIDTH(FEET) = 8.42 AVERAGE FLOW VELOCITY(FEET /SEC.) = 5.00 PRODUCT OF DEPTH &VELOCITY = 1.47 STREETFLOW TRAVELTIME(MIN) = 1.57 TC(MIN) = 9.81 10 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.984 SOIL CLASSIFICATION IS "D" SINGLE FAMILY DEVELOPMENT RUNOFF COEFFICIENT = .5500 SUBAREA AREA(ACRES) = 2.60 SUBAREA RUNOFF(CFS) = 4.27 SUMMED AREA(ACRES) = 3.30 TOTAL RUNOFF(CFS) = 6.25 END OF SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) _ .33 HALFSTREET FLOODWIDTH(FEET) = 10.22 FLOW VELOCITY(FEET /SEC.) = 5.38 DEPTH *VELOCITY = 1.78 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 1.20 TO NODE 2.20 IS CODE = 4 >> >>>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<< <<< >> >>> USING USER - SPECIFIED PIPESIZE<< <<< DEPTH OF FLOW IN 18.0 INCH PIPE IS 9.6 INCHES PIPEFLOW VELOCITY(FEET /SEC.) = 6.5 UPSTREAM NODE ELEVATION = 274.00 DOWNSTREAM NODE ELEVATION = 273.00 FLOWLENGTH(FEET) = 80.00 MANNING'S N = .013 GIVEN PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 6.25 TRAVEL TIME(MIN.) _ .21 TC(MIN.) = 10.02 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 2.10 TO NODE 2.10 IS CODE = 1 --------------------------------------------------------- >> >>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE<< <<< TOTAL NUMBER OF STREAMS = 2 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE: TIME OF CONCENTRATION(MIN.) = 10.02 RAINFALL INTENSITY(INCH /HR) = 2.94 TOTAL STREAM AREA(ACRES) = 3.30 PEAK FLOW RATE(CFS) AT CONFLUENCE = 6.25 FLOW PROCESS FROM NODE 2.00 TO NODE 2.10 IS CODE = 21 ---------------------------------------------------------------------------- >> >>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<< <<< ------------------------------------------- SOIL CLASSIFICATION IS "D" COMMERCIAL DEVELOPMENT RUNOFF COEFFICIENT = .8500 INITIAL SUBAREA FLOW - LENGTH = 540.00 UPSTREAM ELEVATION = 317.00 DOWNSTREAM ELEVATION = 306.00 ELEVATION DIFFERENCE = 11.00 URBAN SUBAREA OVERLAND TIME OF FLOW(MINUTES) = 8.249 *CAUTION: SUBAREA FLOWLENGTH EXCEEDS COUNTY NOMOGRAPH DEFINITION. EXTRAPOLATION OF NOMOGRAPH USED. 10 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.338 SUBAREA RUNOFF(CFS) = 2.55 TOTAL AREA(ACRES) _ .90 TOTAL RUNOFF(CFS) = 2.55 * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE ------------------------- >> >>> COMPUTE STREETFLOW UPSTREAM ELEVATION = STREET LENGTH(FEET) _ STREET HALFWIDTH(FEET) ******************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** 2.10 TO NODE 2.20 IS CODE = 6 --------------------------------------------------- TRAVELTIME THRU SUBAREA<< <<< --------------------- - - ---- 306.00 DOWNSTREAM ELEVATION = 280.00 470.00 CURB HEIGHT(INCHES) = 6. 40.00 DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK = 38.50 INTERIOR STREET CROSSFALL(DECIMAL) _ .020 OUTSIDE STREET CROSSFALL(DECIMAL) _ .087 SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1 * *TRAVELTIME COMPUTED USING MEAN FLOW(CFS) = 3.96 STREETFLOW MODEL RESULTS: STREET FLOWDEPTH(FEET) _ .29 HALFSTREET FLOODWIDTH(FEET) = 8.42 AVERAGE FLOW VELOCITY(FEET /SEC.) = 4.79 PRODUCT OF DEPTH &VELOCITY = 1.41 STREETFLOW TRAVELTIME(MIN) = 1.64 TC(MIN) = 9.89 10 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.971 SOIL CLASSIFICATION IS "D" SINGLE FAMILY DEVELOPMENT RUNOFF COEFFICIENT = .5500 SUBAREA AREA(ACRES) = 1.70 SUBAREA RUNOFF(CFS) = 2.78 SUMMED AREA(ACRES) = 2.60 TOTAL RUNOFF(CFS) = 5.33 END OF SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) _ .32 HALFSTREET FLOODWIDTH(FEET) = 9.62 FLOW VELOCITY(FEET /SEC.) = 5.11 DEPTH *VELOCITY = 1.63 FLOW PROCESS FROM NODE 2.10 TO NODE 2.10 IS CODE = 1 ---------------------------------------------------------------- >> >>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE« <<< >> >>>AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES<< <<< TOTAL NUMBER OF STREAMS = 2 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE: TIME OF CONCENTRATION(MIN.) = 9.89 RAINFALL INTENSITY(INCH /HR) = 2.97 TOTAL STREAM AREA(ACRES) = 2.60 PEAK FLOW RATE(CFS) AT CONFLUENCE = 5.33 ** CONFLUENCE DATA ** STREAM RUNOFF Tc INTENSITY AREA NUMBER (CFS) (MIN.) (INCH /HOUR) (ACRE) 1 6.25 10.02 2.945 3.30 2 5.33 9.89 2.971 2.60 RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO CONFLUENCE FORMULA USED FOR 2 STREAMS. ** PEAK FLOW RATE TABLE ** STREAM RUNOFF NUMBER (CFS) 1 11.53 2 11.54 COMPUTED CONFLUENCE PEAK FLOW RATE(CFS) TOTAL AREA(ACRES) _ Tc (MIN.) 9.89 10.02 ESTIMATES = 11. 5.90 INTENSITY (INCH /HOUR) 2.971 2.945 ARE AS FOLLOWS: 54 Tc(MIN.) = 10.02 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 2.10 TO NODE 3.00 IS CODE = 4 >> >>>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<< <<< >> >>>USING USER - SPECIFIED PIPESIZE« <<< DEPTH OF FLOW IN 18.0 INCH PIPE IS 8.4 INCHES PIPEFLOW VELOCITY(FEET /SEC.) = 14.2 UPSTREAM NODE ELEVATION = 273.00 DOWNSTREAM NODE ELEVATION = 272.00 FLOWLENGTH(FEET) = 15.00 MANNING'S N = .013 GIVEN PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 11.54 TRAVEL TIME(MIN.) _ .02 TC(MIN.) = 10.04 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 3.00 TO NODE 3.00 IS CODE = 8 ------------------------------------------------------------- - - - - -- >> >>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<< <<< 10 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.941 SOIL CLASSIFICATION IS "D" SINGLE FAMILY DEVELOPMENT RUNOFF COEFFICIENT = .5500 SUBAREA AREA(ACRES) = 5.60 SUBAREA RUNOFF(CFS) = 9.06 TOTAL AREA(ACRES) = 11.50 TOTAL RUNOFF(CFS) = 20.60 TC(MIN) = 10.04 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 3.00 TO NODE 4.20 IS CODE = 4 ------------------------------------------------------------- - - - - -- >> >>>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<< <<< >> >>>USING USER - SPECIFIED PIPESIZE« <<< DEPTH OF FLOW IN 18.0 INCH PIPE IS 11.9 INCHES PIPEFLOW VELOCITY(FEET /SEC.) = 16.6 UPSTREAM NODE ELEVATION = 272.00 DOWNSTREAM NODE ELEVATION = 258.50 FLOWLENGTH(FEET) = 190.00 MANNING'S N = .013 GIVEN PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 20.60 TRAVEL TIME(MIN.) _ .19 TC(MIN.) = 10.23 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 4.20 TO NODE 4.20 IS CODE = 1 -------------------------------------------------------------------------- >> >>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE« <<< TOTAL NUMBER OF STREAMS = 2 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE: TIME OF CONCENTRATION(MIN.) = 10.23 RAINFALL INTENSITY(INCH /HR) = 2.91 TOTAL STREAM AREA(ACRES) = 11.50 PEAK FLOW RATE(CFS) AT CONFLUENCE = 20.60 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 4.00 TO NODE 4.10 IS CODE = 21 ------------------------------------------------------------------ >> >>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<< <<< SOIL CLASSIFICATION IS "D" SINGLE FAMILY DEVELOPMENT RUNOFF COEFFICIENT = .5500 INITIAL SUBAREA FLOW - LENGTH = 500.00 UPSTREAM ELEVATION = 275.00 DOWNSTREAM ELEVATION = 262.00 ELEVATION DIFFERENCE = 13.00 URBAN SUBAREA OVERLAND TIME OF FLOW(MINUTES) = 16.099 *CAUTION: SUBAREA SLOPE EXCEEDS COUNTY NOMOGRAPH DEFINITION. EXTRAPOLATION OF NOMOGRAPH USED. 10 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.169 SUBAREA RUNOFF(CFS) = 2.98 TOTAL AREA(ACRES) = 2.50 TOTAL RUNOFF(CFS) = 2.98 FLOW PROCESS FROM NODE 4.10 TO NODE 4.20 IS CODE = 4 >> >>>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<< <<< >> >>>USING USER - SPECIFIED PIPESIZE<< <<< DEPTH OF FLOW IN 18.0 INCH PIPE IS 5.3 INCHES PIPEFLOW VELOCITY(FEET /SEC.) = 6.9 UPSTREAM NODE ELEVATION = 260.00 DOWNSTREAM NODE ELEVATION = 258.50 FLOWLENGTH(FEET) = 60.00 MANNING'S N = .013 GIVEN PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 2.98 TRAVEL TIME(MIN.) _ .15 TC(MIN.) = 16.25 FLOW PROCESS FROM NODE 4.20 TO NODE 4.20 IS CODE = 1 -------------------------------------------------------------- >> >>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE« <<< >> >>>AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES<< <<< TOTAL NUMBER OF STREAMS = 2 --------------------------- ------------- CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE: TIME OF CONCENTRATION(MIN.) = 16.25 RAINFALL INTENSITY(INCH /HR) = 2.16 TOTAL STREAM AREA(ACRES) = 2.50 PEAK FLOW RATE(CFS) AT CONFLUENCE = 2.98 ** CONFLUENCE DATA ** STREAM RUNOFF Tc INTENSITY AREA NUMBER (CFS) (MIN.) (INCH /HOUR) (ACRE) 1 20.60 10.23 2.906 11.50 2 2.98 16.25 2.156 2.50 RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO CONFLUENCE FORMULA USED FOR 2 STREAMS. ** PEAK FLOW RATE TABLE ** STREAM RUNOFF Tc INTENSITY NUMBER (CFS) (MIN.) (INCH /HOUR) 1 22.81 10.23 2.906 2 18.27 16.25 2.156 COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS: PEAK FLOW RATE(CFS) = 22.81 Tc(MIN.) = 10.23 TOTAL AREA(ACRES) = 14.00 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 4.20 TO NODE 5.00 IS CODE = 4 >> >>> COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<< <<< >> >>>USING USER - SPECIFIED PIPESIZE<< <<< DEPTH OF FLOW IN 18.0 INCH PIPE IS 12.0 INCHES PIPEFLOW VELOCITY(FEET /SEC.) = 18.3 UPSTREAM NODE ELEVATION = 258.50 DOWNSTREAM NODE ELEVATION = 234.00 FLOWLENGTH(FEET) = 285.00 MANNING'S N = .013 GIVEN PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 22.81 TRAVEL TIME(MIN.) _ .26 TC(MIN.) = 10.49 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 5.00 TO NODE 5.00 IS CODE = 8 ------------------------------------------------------------------------ >> >>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<< <<< 10 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.859 SOIL CLASSIFICATION IS "D" SINGLE FAMILY DEVELOPMENT RUNOFF COEFFICIENT = .5500 SUBAREA AREA(ACRES) = 4.00 SUBAREA RUNOFF(CFS) = 6.29 TOTAL AREA(ACRES) = 18.00 TOTAL RUNOFF(CFS) = 29.10 TC(MIN) = 10.49 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 5.00 TO NODE 6.10 IS CODE = 4 ------------------------------------------------------------- >> >>>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<< <<< >> >>>USING USER - SPECIFIED PIPESIZE<< <<< ------------------------- PIPEFLOW VELOCITY(FEET /SEC.) = 16.5 UPSTREAM NODE ELEVATION = 234.00 DOWNSTREAM NODE ELEVATION = 208.00 FLOWLENGTH(FEET) = 365.00 MANNING'S N = .013 GIVEN PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 29.10 TRAVEL TIME(MIN.) = .37 TC(MIN.) = 10.86 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 6.10 TO NODE 6.10 IS CODE = 8 ----------------------------------------------------------------- >> >>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<< <<< 10 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.796 SOIL CLASSIFICATION IS "D" SINGLE FAMILY DEVELOPMENT RUNOFF COEFFICIENT = .5500 SUBAREA AREA(ACRES) = 16.00 SUBAREA RUNOFF(CFS) = 24.61 TOTAL AREA(ACRES) = 34.00 TOTAL RUNOFF(CFS) = 53.71 TC(MIN) = 10.86 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 6.10 TO NODE 6.10 IS CODE = 1 ---------------------------------------------------------------- >> >>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE« <<< TOTAL NUMBER OF STREAMS = 2 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE: TIME OF CONCENTRATION(MIN.) = 10.86 RAINFALL INTENSITY(INCH /HR) = 2.80 TOTAL STREAM AREA(ACRES) = 34.00 PEAK FLOW RATE(CFS) AT CONFLUENCE = 53.71 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 6.00 TO NODE 6.10 IS CODE = 21 ----------------------------------------------------------- >> >>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<< <<< SOIL CLASSIFICATION IS "D" SINGLE FAMILY DEVELOPMENT RUNOFF COEFFICIENT = .5500 INITIAL SUBAREA FLOW - LENGTH = 700.00 UPSTREAM ELEVATION = 275.00 DOWNSTREAM ELEVATION = 216.00 ELEVATION DIFFERENCE = 59.00 URBAN SUBAREA OVERLAND TIME OF FLOW(MINUTES) = 12.872 *CAUTION: SUBAREA SLOPE EXCEEDS COUNTY NOMOGRAPH DEFINITION. EXTRAPOLATION OF NOMOGRAPH USED. *CAUTION: SUBAREA FLOWLENGTH EXCEEDS COUNTY NOMOGRAPH DEFINITION. EXTRAPOLATION OF NOMOGRAPH USED. 10 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.506 SUBAREA RUNOFF(CFS) = 4.41 TOTAL AREA(ACRES) = 3.20 TOTAL RUNOFF(CFS) = 4.41 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 6.10 TO NODE 6.10 IS CODE = 8 ---------------------------------------------------------------------------- >> >>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<< <<< 10 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.506 SOIL CLASSIFICATION IS "D" SINGLE FAMILY DEVELOPMENT RUNOFF COEFFICIENT = .5500 SUBAREA AREA(ACRES) _ .20 SUBAREA RUNOFF(CFS) _ .28 TOTAL AREA(ACRES) = 3.40 TOTAL RUNOFF(CFS) = 4.69 TC(MIN) = 12.87 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 6.10 TO NODE 6.10 IS CODE = 1 ---------------------------------------------------------------------------- >> >>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE« <<< >> >>>AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES<< <<< TOTAL NUMBER OF STREAMS = 2 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE: TIME OF CONCENTRATION(MIN.) = 12.87 RAINFALL INTENSITY(INCH /HR) = 2.51 TOTAL STREAM AREA(ACRES) = 3.40 PEAK FLOW RATE(CFS) AT CONFLUENCE = 4.69 ** CONFLUENCE DATA ** STREAM RUNOFF Tc INTENSITY AREA NUMBER (CFS) (MIN.) (INCH /HOUR) (ACRE) 1 53.71 10.86 2.796 34.00 2 4.69 12.87 2.506 3.40 RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO CONFLUENCE FORMULA USED FOR 2 STREAMS. ** PEAK FLOW RATE TABLE ** STREAM RUNOFF Tc INTENSITY NUMBER (CFS) (MIN.) (INCH /HOUR) 1 57.91 10.86 2.796 2 52.81 12.87 2.506 COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS: PEAK FLOW RATE(CFS) = 57.91 Tc(MIN.) = 10.86 TOTAL AREA(ACRES) = 37.40 FLOW PROCESS FROM NODE 6.10 TO NODE 7.10 IS CODE = 4 >> >>> COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<< <<< >> >>>USING USER - SPECIFIED PIPESIZE<< <<< DEPTH OF FLOW IN 36.0 INCH PIPE IS 14.8 INCHES PIPEFLOW VELOCITY(FEET /SEC.) = 21.1 UPSTREAM NODE ELEVATION = 207.00 DOWNSTREAM NODE ELEVATION = 199.00 FLOWLENGTH(FEET) = 120.00 MANNING'S N = .013 GIVEN PIPE DIAMETER(INCH) = 36.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 57.91 TRAVEL TIME(MIN.) _ .09 TC(MIN.) = 10.95 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 7.10 TO NODE 7.10 IS CODE = 1 ---------------------------------------------------------------------------- >> >>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE« <<< TOTAL NUMBER OF STREAMS = 2 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE: TIME OF CONCENTRATION(MIN.) = 10.95 RAINFALL INTENSITY(INCH /HR) = 2.78 TOTAL STREAM AREA(ACRES) = 37.40 PEAK FLOW RATE(CFS) AT CONFLUENCE = 57.91 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 7.00 TO NODE 7.10 IS CODE = 21 ---------------------------------------------------------------------------- >> >>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<< <<< ---------------------------- ----------------- SOIL CLASSIFICATION IS "D" SINGLE FAMILY DEVELOPMENT RUNOFF COEFFICIENT = .5500 INITIAL SUBAREA FLOW- LENGTH = 940.00 UPSTREAM ELEVATION = 280.00 DOWNSTREAM ELEVATION = 210.00 ELEVATION DIFFERENCE = 70.00 URBAN SUBAREA OVERLAND TIME OF FLOW(MINUTES) = 15.544 *CAUTION: SUBAREA SLOPE EXCEEDS COUNTY NOMOGRAPH DEFINITION. EXTRAPOLATION OF NOMOGRAPH USED. *CAUTION: SUBAREA FLOWLENGTH EXCEEDS COUNTY NOMOGRAPH DEFINITION. EXTRAPOLATION OF NOMOGRAPH USED. 10 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.218 SUBAREA RUNOFF(CFS) = 8.17 TOTAL AREA(ACRES) = 6.70 TOTAL RUNOFF(CFS) = 8.17 ti******************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 7.10 TO NODE 7.10 IS CODE = 1 >> >>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE« <<< >> >>>AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES<< <<< ------------------------- --------------------- TOTAL NUMBER OF STREAMS = 2 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE: TIME OF CONCENTRATION(MIN.) = 15.54 RAINFALL INTENSITY(INCH /HR) = 2.22 TOTAL STREAM AREA(ACRES) = 6.70 PEAK FLOW RATE(CFS) AT CONFLUENCE = 8.17 ** CONFLUENCE DATA ** STREAM RUNOFF Tc INTENSITY AREA NUMBER (CFS) (MIN.) (INCH /HOUR) (ACRE) 1 57.91 10.95 2.781 37.40 2 8.17 15.54 2.218 6.70 RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO CONFLUENCE FORMULA USED FOR 2 STREAMS. ** PEAK FLOW RATE TABLE ** STREAM RUNOFF Tc INTENSITY NUMBER (CFS) (MIN.) (INCH /HOUR) 1 64.43 10.95 2.781 2 54.37 15.54 2.218 COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS: PEAK FLOW RATE(CFS) = 64.43 Tc(MIN.) = 10.95 TOTAL AREA(ACRES) = 44.10 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 7.10 TO NODE 9.10 IS CODE = 4 >> >>>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<< <<< >> >>>USING USER - SPECIFIED PIPESIZE<< <<< DEPTH OF FLOW IN 36.0 INCH PIPE IS 23.4 INCHES PIPEFLOW VELOCITY(FEET /SEC.) = 13.3 UPSTREAM NODE ELEVATION = 199.00 DOWNSTREAM NODE ELEVATION = 196.00 FLOWLENGTH(FEET) = 165.00 MANNING'S N = .013 GIVEN PIPE DIAMETER(INCH) = 36.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 64.43 TRAVEL TIME(MIN.) _ .21 TC(MIN.) = 11.16 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 9.10 TO NODE 9.10 IS CODE = 1 ---------------------------------------------------------------- >> >>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE« <<< TOTAL NUMBER OF STREAMS = 2 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE: TIME OF CONCENTRATION(MIN.) = 11.16 RAINFALL INTENSITY(INCH /HR) = 2.75 TOTAL STREAM AREA(ACRES) = 44.10 PEAK FLOW RATE(CFS) AT CONFLUENCE = 64.43 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 8.00 TO NODE 8.10 IS CODE = 21 ------------------------------------------------------------- >> >>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<< <<< SOIL CLASSIFICATION IS "D" SINGLE FAMILY DEVELOPMENT RUNOFF COEFFICIENT = .5500 INITIAL SUBAREA FLOW - LENGTH = 1000.00 UPSTREAM ELEVATION = 265.00 DOWNSTREAM ELEVATION = 225.00 ELEVATION DIFFERENCE = 40.00 URBAN SUBAREA OVERLAND TIME OF FLOW(MINUTES) = 19.723 *CAUTION: SUBAREA SLOPE EXCEEDS COUNTY NOMOGRAPH DEFINITION. EXTRAPOLATION OF NOMOGRAPH USED. *CAUTION: SUBAREA FLOWLENGTH EXCEEDS COUNTY NOMOGRAPH DEFINITION. EXTRAPOLATION OF NOMOGRAPH USED. 10 YEAR RAINFALL INTENSITY(INCH /HOUR) = 1.903 SUBAREA RUNOFF(CFS) = 6.17 TOTAL AREA(ACRES) = 5.90 TOTAL RUNOFF(CFS) = 6.17 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 8.10 TO NODE 8.20 IS CODE = 6 ---------------------------------------------------------------------------- >> >>>COMPUTE STREETFLOW TRAVELTIME THRU SUBAREA<< <<< ------------------------------ ---------- UPSTREAM ELEVATION = 225.00 DOWNSTREAM ELEVATION = 206.00 STREET LENGTH(FEET) = 600.00 CURB HEIGHT(INCHES) = 6. STREET HALFWIDTH(FEET) = 12.00 DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK = 10.00 INTERIOR STREET CROSSFALL(DECIMAL) = .020 OUTSIDE STREET CROSSFALL(DECIMAL) = .020 SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1 * *TRAVELTIME COMPUTED USING MEAN FLOW(CFS) = 7.69 * * *STREETFLOW SPLITS OVER STREET - CROWN * ** FULL DEPTH(FEET) = .37 FLOODWIDTH(FEET) = 12.00 FULL HALF- STREET VELOCITY(FEET /SEC.) = 4.42 SPLIT DEPTH(FEET) _ .20 SPLIT FLOODWIDTH(FEET) = 3.80 SPLIT FLOW(CFS) = .80 SPLIT VELOCITY(FEET /SEC.) = 3.04 STREETFLOW MODEL RESULTS: STREET FLOWDEPTH(FEET) _ .37 HALFSTREET FLOODWIDTH(FEET) = 12.00 AVERAGE FLOW VELOCITY(FEET /SEC.) = 4.42 PRODUCT OF DEPTH &VELOCITY = 1.62 STREETFLOW TRAVELTIME(MIN) = 2.26 TC(MIN) = 21.98 10 YEAR RAINFALL INTENSITY(INCH /HOUR) = 1.774 SOIL CLASSIFICATION IS "D" SINGLE FAMILY DEVELOPMENT RUNOFF COEFFICIENT = .5500 SUBAREA AREA(ACRES) = 3.10 SUBAREA RUNOFF(CFS) = 3.02 SUMMED AREA(ACRES) = 9.00 TOTAL RUNOFF(CFS) = 9.20 END OF SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) = .37 HALFSTREET FLOODWIDTH(FEET) = 12.00 FLOW VELOCITY(FEET /SEC.) = 4.42 DEPTH *VELOCITY = 1.62 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 8.20 TO NODE 9.00 IS CODE = 4 >> >>>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<< <<< >> >>> USING USER - SPECIFIED PIPESIZE<< <<< DEPTH OF FLOW IN 18.0 INCH PIPE IS 9.9 INCHES PIPEFLOW VELOCITY(FEET /SEC.) = 9.3 UPSTREAM NODE ELEVATION = 200.00 DOWNSTREAM NODE ELEVATION = 199.00 FLOWLENGTH(FEET) = 40.00 MANNING'S N = .013 GIVEN PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 9.20 TRAVEL TIME(MIN.) = .07 TC(MIN.) = 22.06 F******************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 9.00 TO NODE 9.00 IS CODE = 8 ------------------------------------------------------------------------- >> >>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<< <<< 10 YEAR RAINFALL INTENSITY(INCH /HOUR) = 1.770 SOIL CLASSIFICATION IS "D" COMMERCIAL DEVELOPMENT RUNOFF COEFFICIENT = .8500 SUBAREA AREA(ACRES) _ .50 SUBAREA RUNOFF(CFS) _ .75 TOTAL AREA(ACRES) = 9.50 TOTAL RUNOFF(CFS) = 9.95 TC(MIN) = 22.06 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 9.00 TO NODE 9.10 IS CODE = 4 >> >>> COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<< <<< >> >>>USING USER - SPECIFIED PIPESIZE« <<< ------------------------ ------------------- DEPTH OF FLOW IN 18.0 INCH PIPE IS 10.6 INCHES PIPEFLOW VELOCITY(FEET /SEC.) = 9.1 UPSTREAM NODE ELEVATION = 199.00 DOWNSTREAM NODE ELEVATION = 196.00 FLOWLENGTH(FEET) = 130.00 MANNING'S N = .013 GIVEN PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 9.95 TRAVEL TIME(MIN.) _ .24 TC(MIN.) = 22.29 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 9.10 TO NODE 9.10 IS CODE = 1 >> >>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE« <<< >> >>>AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES<< <<< TOTAL NUMBER OF STREAMS = 2 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE: TIME OF CONCENTRATION(MIN.) = 22.29 RAINFALL INTENSITY(INCH /HR) = 1.76 TOTAL STREAM AREA(ACRES) = 9.50 PEAK FLOW RATE(CFS) AT CONFLUENCE = 9.95 ** CONFLUENCE DATA ** STREAM RUNOFF Tc INTENSITY AREA NUMBER (CFS) (MIN.) (INCH /HOUR) (ACRE) 1 64.43 11.16 2.747 44.10 2 9.95 22.29 1.758 9.50 RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO CONFLUENCE FORMULA USED FOR 2 STREAMS. ** PEAK FLOW RATE TABLE ** STREAM RUNOFF NUMBER (CFS) 1 70.80 2 51.18 COMPUTED CONFLUENCE PEAK FLOW RATE(CFS) TOTAL AREA(ACRES) _ Tc (MIN.) 11.16 22.29 ESTIMATES 70. 53.60 INTENSITY (INCH /HOUR) 2.747 1.758 ARE AS FOLLOWS: BO Tc(MIN.) = 11.16 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 9.10 TO NODE 10.20 IS CODE = 4 -------------------------------------------------------------- >> >>> COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<< <<< >> >>>USING USER - SPECIFIED PIPESIZE« <<< --------------------------- -------------- DEPTH OF FLOW IN 36.0 INCH PIPE IS 22.2 INCHES PIPEFLOW VELOCITY(FEET /SEC.) = 15.5 UPSTREAM NODE ELEVATION = 196.00 DOWNSTREAM NODE ELEVATION = 193.00 FLOWLENGTH(FEET) = 118.00 MANNING'S N = .013 GIVEN PIPE DIAMETER(INCH) = 36.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 70.80 TRAVEL TIME(MIN.) _ .13 TC(MIN.) = 11.29 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 10.20 TO NODE 10.20 IS CODE = 1 ---------------------------------------------------------------------------- >> >>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE« <<< TOTAL NUMBER OF STREAMS = 2 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE: TIME OF CONCENTRATION(MIN.) = 11.29 RAINFALL INTENSITY(INCH /HR) = 2.73 TOTAL STREAM AREA(ACRES) = 53.60 PEAK FLOW RATE(CFS) AT CONFLUENCE = 70.80 FLOW PROCESS FROM NODE 10.00 TO NODE 10.10 IS CODE = 21 ---------------------------------------------------------------------------- >> >>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<< <<< SOIL CLASSIFICATION IS "D" SINGLE FAMILY DEVELOPMENT RUNOFF COEFFICIENT = .5500 INITIAL SUBAREA FLOW - LENGTH = 300.00 UPSTREAM ELEVATION = 222.00 DOWNSTREAM ELEVATION = 202.00 ELEVATION DIFFERENCE = 20.00 URBAN SUBAREA OVERLAND TIME OF FLOW(MINUTES) = 9.111 *CAUTION: SUBAREA SLOPE EXCEEDS COUNTY NOMOGRAPH DEFINITION. EXTRAPOLATION OF NOMOGRAPH USED. 10 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.131 SUBAREA RUNOFF(CFS) = 3.10 TOTAL AREA(ACRES) = 1.80 TOTAL RUNOFF(CFS) = 3.10 FLOW PROCESS FROM NODE 10.10 TO NODE 10.20 IS CODE = 4 >> >>>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<< <<< >> >>>USING USER - SPECIFIED PIPESIZE<< <<< DEPTH OF FLOW IN 18.0 INCH PIPE IS 3.9 INCHES PIPEFLOW VELOCITY(FEET /SEC.) = 11.1 UPSTREAM NODE ELEVATION = 202.00 DOWNSTREAM NODE ELEVATION = 193.00 FLOWLENGTH(FEET) = 95.00 MANNING'S N = .013 GIVEN PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 3.10 TRAVEL TIME(MIN.) _ .14 TC(MIN.) = 9.25 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 10.20 TO NODE 10.20 IS CODE = 1 >> >>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE« <<< >> >>>AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES<< <<< TOTAL NUMBER OF STREAMS = 2 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE: TIME OF CONCENTRATION(MIN.) = 9.25 RAINFALL INTENSITY(INCH /HR) = 3.10 TOTAL STREAM AREA(ACRES) = 1.80 PEAK FLOW RATE(CFS) AT CONFLUENCE = 3.10 ** CONFLUENCE DATA ** STREAM RUNOFF Tc INTENSITY AREA NUMBER (CFS) (MIN.) (INCH /HOUR) (ACRE) 1 70.80 11.29 2.727 53.60 2 3.10 9.25 3.100 1.80 RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO CONFLUENCE FORMULA USED FOR 2 STREAMS. ** PEAK FLOW RATE TABLE ** STREAM RUNOFF Tc INTENSITY NUMBER (CFS) (MIN.) (INCH /HOUR) 1 65.38 9.25 3.100 2 73.52 11.29 2.727 COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS: PEAK FLOW RATE(CFS) = 73.52 Tc(MIN.) = 11.29 TOTAL AREA(ACRES) = 55.40 END OF STUDY SUMMARY: PEAK FLOW RATE(CFS) = 73.52 Tc(MIN.) = 11.29 TOTAL AREA(ACRES) = 55.40 END OF RATIONAL METHOD ANALYSIS RATIONAL METHOD HYDROLOGY COMPUTER PROGRAM PACKAGE Reference: SAN DIEGO COUNTY FLOOD CONTROL DISTRICT 1985,1981 HYDROLOGY MANUAL (c) Copyright 1982 -94 Advanced Engineering Software (aes) Ver. 1.5A Release Date: 3/16/94 License ID 1415 Analysis prepared by: Nolte and Associates, Inc. 5469 Kearny Villa Road, Suite 305 San Diego, CA 92123 * * * * * * * * * * * * * * * * * * * * * * * * ** DESCRIPTION OF STUDY * * * * * * * * * * * * * * * * * * * * * * * * ** t LEUCADIA BLVD * ULTIMATE CONDITION 50 YR ANALYSIS t LINES Al, A2, A3, A4, & AS ******************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FILE NAME: LINEA.DAT TIME /DATE OF STUDY: 18:30 3/26/1996 --------------------------------------------------------------------------- USER SPECIFIED HYDROLOGY AND HYDRAULIC MODEL INFORMATION: ---------------------------------------------------------------------- 1985 SAN DIEGO MANUAL CRITERIA USER SPECIFIED STORM EVENT(YEAR) = 50.00 6 -HOUR DURATION PRECIPITATION (INCHES) = 2.250 SPECIFIED MINIMUM PIPE SIZE(INCH) = 18.00 SPECIFIED PERCENT OF GRADIENTS(DECIMAL) TO USE FOR FRICTION SLOPE _ .90 SAN DIEGO HYDROLOGY MANUAL "C "- VALUES USED NOTE: ONLY PEAK CONFLUENCE VALUES CONSIDERED FLOW PROCESS FROM NODE 1.00 TO NODE 1.10 IS CODE = 21 - ----------------------------------------------------------------- >> >>> RATIONAL METHOD INITIAL SUBAREA ANALYSIS<< <<< SOIL CLASSIFICATION IS "D" COMMERCIAL DEVELOPMENT RUNOFF COEFFICIENT = .8500 INITIAL SUBAREA FLOW - LENGTH = 540.00 UPSTREAM ELEVATION = 317.00 DOWNSTREAM ELEVATION = 306.00 ELEVATION DIFFERENCE = 11.00 URBAN SUBAREA OVERLAND TIME OF FLOW(MINUTES) = 8.249 *CAUTION: SUBAREA FLOWLENGTH EXCEEDS COUNTY NOMOGRAPH DEFINITION. EXTRAPOLATION OF NOMOGRAPH USED. 50 YEAR RAINFALL INTENSITY(INCH /HOUR) = 4.292 SUBAREA RUNOFF(CFS) = 2.55 TOTAL AREA(ACRES) _ .70 TOTAL RUNOFF(CFS) = 2.55 FLOW PROCESS FROM NODE 1.10 TO NODE 1.20 IS CODE = 6 ----------------------------------------------------------- >> >>>COMPUTE STREETFLOW TRAVELTIME THRU SUBAREA<< <<< --------------- - - -- UPSTREAM ELEVATION = 306.00 DOWNSTREAM ELEVATION = 280.00 STREET LENGTH(FEET) = 470.00 CURB HEIGHT(INCHES) = 6. STREET HALFWIDTH(FEET) = 40.00 DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK = 38.50 INTERIOR STREET CROSSFALL(DECIMAL) _ .020 OUTSIDE STREET CROSSFALL(DECIMAL) _ .087 SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1 * *TRAVELTIME COMPUTED USING MEAN FLOW(CFS) = 5.33 STREETFLOW MODEL RESULTS: STREET FLOWDEPTH(FEET) _ .32 HALFSTREET FLOODWIDTH(FEET) = 9.62 AVERAGE FLOW VELOCITY(FEET /SEC.) = 5.11 PRODUCT OF DEPTH &VELOCITY = 1.63 STREETFLOW TRAVELTIME(MIN) = 1.53 TC(MIN) = 9.78 50 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.845 SOIL CLASSIFICATION IS "D" SINGLE FAMILY DEVELOPMENT RUNOFF COEFFICIENT = .5500 SUBAREA AREA(ACRES) = 2.60 SUBAREA RUNOFF(CFS) = 5.50 SUMMED AREA(ACRES) = 3.30 TOTAL RUNOFF(CFS) = 8.05 END OF SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) _ .35 HALFSTREET FLOODWIDTH(FEET) = 11.43 FLOW VELOCITY(FEET /SEC.) = 5.66 DEPTH *VELOCITY = 2.01 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 1.20 TO NODE 2.20 IS CODE = 4 ---------------------------------------------------------------------- - - - - -- >> >>>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<< <<< >> >>> USING USER - SPECIFIED PIPESIZE<< <<< --------------------------------- ------ DEPTH OF FLOW IN 18.0 INCH PIPE IS 11.3 INCHES PIPEFLOW VELOCITY(FEET /SEC.) = 6.9 UPSTREAM NODE ELEVATION = 274.00 DOWNSTREAM NODE ELEVATION = 273.00 FLOWLENGTH(FEET) = 80.00 MANNING'S N = .013 GIVEN PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 8.05 TRAVEL TIME(MIN.) _ .19 TC(MIN.) = 9.98 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 2.10 TO NODE 2.10 IS CODE = 1 ---------------------------------------------------------------------- - - - - -- >> >>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE« <<< ------------------------------- - - ---- TOTAL NUMBER OF STREAMS = 2 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE: TIME OF CONCENTRATION(MIN.) = 9.98 RAINFALL INTENSITY(INCH /HR) = 3.80 TOTAL STREAM AREA(ACRES) = 3.30 PEAK FLOW RATE(CFS) AT CONFLUENCE = 8.05 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 2.00 TO NODE 2.10 IS CODE = 21 ---------------------------------------------------------------------------- >> >>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<< <<< --------------------------------------- SOIL CLASSIFICATION IS "D" COMMERCIAL DEVELOPMENT RUNOFF COEFFICIENT = .8500 INITIAL SUBAREA FLOW - LENGTH = 540.00 UPSTREAM ELEVATION = 317.00 DOWNSTREAM ELEVATION = 306.00 ELEVATION DIFFERENCE = 11.00 URBAN SUBAREA OVERLAND TIME OF FLOW(MINUTES) = 8.249 *CAUTION: SUBAREA FLOWLENGTH EXCEEDS COUNTY NOMOGRAPH DEFINITION. EXTRAPOLATION OF NOMOGRAPH USED. 50 YEAR RAINFALL INTENSITY(INCH /HOUR) = 4.292 SUBAREA RUNOFF(CFS) = 3.28 TOTAL AREA(ACRES) = .90 TOTAL RUNOFF(CFS) = 3.28 FLOW PROCESS FROM NODE ------------------------- >> >>> COMPUTE STREETFLOW UPSTREAM ELEVATION = STREET LENGTH(FEET) _ STREET HALFWIDTH(FEET) ******************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** 2.10 TO NODE 2.20 IS CODE = 6 --------------------------------------------------- TRAVELTIME THRU SUBAREA<< <<< ----------------------- - - ---- 306.00 DOWNSTREAM ELEVATION = 280.00 470.00 CURB HEIGHT(INCHES) = 6. = 40.00 DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK = 38.50 INTERIOR STREET CROSSFALL(DECIMAL) = .020 OUTSIDE STREET CROSSFALL(DECIMAL) = .087 SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1 * *TRAVELTIME COMPUTED USING MEAN FLOW(CFS) = 5.09 STREETFLOW MODEL RESULTS: STREET FLOWDEPTH(FEET) _ .32 HALFSTREET FLOODWIDTH(FEET) = 9.62 AVERAGE FLOW VELOCITY(FEET /SEC.) = 4.88 PRODUCT OF DEPTH &VELOCITY = 1.56 STREETFLOW TRAVELTIME(MIN) = 1.61 TC(MIN) = 9.85 50 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.827 SOIL CLASSIFICATION IS "D" SINGLE FAMILY DEVELOPMENT RUNOFF COEFFICIENT = .5500 SUBAREA AREA(ACRES) = 1.70 SUBAREA RUNOFF(CFS) = 3.58 SUMMED AREA(ACRES) = 2.60 TOTAL RUNOFF(CFS) = 6.86 END OF SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) = .34 HALFSTREET FLOODWIDTH(FEET) = 10.82 FLOW VELOCITY(FEET /SEC.) = 5.32 DEPTH *VELOCITY = 1.82 FLOW PROCESS FROM NODE 2.10 TO NODE 2.10 IS CODE = 1 ----------------------------------------------------------------- >> >>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE<< <<< >> >>>AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES<< <<< TOTAL NUMBER OF STREAMS = 2 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE: TIME OF CONCENTRATION(MIN.) = 9.85 RAINFALL INTENSITY(INCH /HR) = 3.83 TOTAL STREAM AREA(ACRES) = 2.60 PEAK FLOW RATE(CFS) AT CONFLUENCE = 6.86 ** CONFLUENCE DATA ** STREAM RUNOFF Tc INTENSITY AREA NUMBER (CFS) (MIN.) (INCH /HOUR) (ACRE) 1 8.05 9.98 3.797 3.30 2 6.86 9.85 3.827 2.60 RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO CONFLUENCE FORMULA USED FOR 2 STREAMS. ** PEAK FLOW RATE TABLE ** STREAM RUNOFF Tc INTENSITY NUMBER (CFS) (MIN.) (INCH /HOUR) 1 14.85 9.85 3.827 2 14.86 9.98 3.797 COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS: PEAK FLOW RATE(CFS) = 14.86 Tc(MIN.) = 9.98 TOTAL AREA(ACRES) = 5.90 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 2.10 TO NODE 3.00 IS CODE = 4 >> >>>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<< <<< >> >>>USING USER - SPECIFIED PIPESIZE« <<< DEPTH OF FLOW IN 18.0 INCH PIPE IS 9.8 INCHES PIPEFLOW VELOCITY(FEET /SEC.) = 15.1 UPSTREAM NODE ELEVATION = 273.00 DOWNSTREAM NODE ELEVATION = 272.00 FLOWLENGTH(FEET) = 15.00 MANNING'S N = .013 GIVEN PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 14.86 TRAVEL TIME(MIN.) = .02 TC(MIN.) = 9.99 ******************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 3.00 TO NODE 3.00 IS CODE = 8 ------------------------------------------------------------ >> >>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<< <<< 50 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.793 SOIL CLASSIFICATION IS "D" SINGLE FAMILY DEVELOPMENT RUNOFF COEFFICIENT = .5500 SUBAREA AREA(ACRES) = 5.60 SUBAREA RUNOFF(CFS) = 11.68 TOTAL AREA(ACRES) = 11.50 TOTAL RUNOFF(CFS) = 26.54 TC(MIN) = 9.99 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 3.00 TO NODE 4.20 IS CODE = 4 --------------------------------------------------------- >> >>>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<< <<< >> >>>USING USER - SPECIFIED PIPESIZE« <<< DEPTH OF FLOW IN 18.0 INCH PIPE IS 14.7 INCHES PIPEFLOW VELOCITY(FEET /SEC.) = 17.1 UPSTREAM NODE ELEVATION = 272.00 DOWNSTREAM NODE ELEVATION = 258.50 FLOWLENGTH(FEET) = 190.00 MANNING'S N = .013 GIVEN PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 26.54 TRAVEL TIME(MIN.) = .18 TC(MIN.) = 10.18 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 4.20 TO NODE 4.20 IS CODE = 1 ---------------------------------------------------------------------------- >> >>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE« <<< TOTAL NUMBER OF STREAMS = 2 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE: TIME OF CONCENTRATION(MIN.) = 10.18 RAINFALL INTENSITY(INCH /HR) = 3.75 TOTAL STREAM AREA(ACRES) = 11.50 PEAK FLOW RATE(CFS) AT CONFLUENCE = 26.54 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 4.00 TO NODE 4.10 IS CODE = 21 ---------------------------------------------------------------------------- >> >>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<< <<< SOIL CLASSIFICATION IS "D" SINGLE FAMILY DEVELOPMENT RUNOFF COEFFICIENT = .5500 INITIAL SUBAREA FLOW - LENGTH = 500.00 UPSTREAM ELEVATION = 275.00 DOWNSTREAM ELEVATION = 262.00 ELEVATION DIFFERENCE = 13.00 URBAN SUBAREA OVERLAND TIME OF FLOW(MINUTES) = 16.099 *CAUTION: SUBAREA SLOPE EXCEEDS COUNTY NOMOGRAPH DEFINITION. EXTRAPOLATION OF NOMOGRAPH USED. 50 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.788 SUBAREA RUNOFF(CFS) = 3.83 TOTAL AREA(ACRES) = 2.50 TOTAL RUNOFF(CFS) = 3.83 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 4.10 TO NODE 4.20 IS CODE = 4 >> >>>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<< <<< >> >>>USING USER - SPECIFIED PIPESIZE<< <<< --------------------------------- ---------___ --------------- - DEPTH OF FLOW IN 18.0 INCH PIPE IS 6.0 INCHES PIPEFLOW VELOCITY(FEET /SEC.) = 7.4 UPSTREAM NODE ELEVATION = 260.00 DOWNSTREAM NODE ELEVATION = 258.50 FLOWLENGTH(FEET) = 60.00 MANNING'S N = .013 GIVEN PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 3.83 TRAVEL TIME(MIN.) = .14 TC(MIN.) = 16.24 ******************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 4.20 TO NODE 4.20 IS CODE = 1 --------------------------------------------------------------------- >> >>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE« <<< >> >>>AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES<< <<< TOTAL NUMBER OF STREAMS = 2 -------------------------- --------------- CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE: TIME OF CONCENTRATION(MIN.) = 16.24 RAINFALL INTENSITY(INCH /HR) = 2.77 TOTAL STREAM AREA(ACRES) = 2.50 PEAK FLOW RATE(CFS) AT CONFLUENCE = 3.83 ** CONFLUENCE DATA ** STREAM RUNOFF Tc INTENSITY AREA NUMBER (CFS) (MIN.) (INCH /HOUR) (ACRE) 1 26.54 10.18 3.748 11.50 2 3.83 16.24 2.773 2.50 RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO CONFLUENCE FORMULA USED FOR 2 STREAMS. ** PEAK FLOW RATE TABLE ** STREAM RUNOFF Tc INTENSITY NUMBER (CFS) (MIN.) (INCH /HOUR) 1 29.38 10.18 3.748 2 23.47 16.24 2.773 COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS: PEAK FLOW RATE(CFS) = 29.38 Tc(MIN.) = 10.18 TOTAL AREA(ACRES) = 14.00 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 4.20 TO NODE 5.00 IS CODE = 4 >> >>> COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<< <<< >> >>>USING USER - SPECIFIED PIPESIZE<< <<< PIPEFLOW VELOCITY(FEET /SEC.) = 16.6 UPSTREAM NODE ELEVATION = 258.50 DOWNSTREAM NODE ELEVATION = 234.00 FLOWLENGTH(FEET) = 285.00 MANNING'S N = .013 GIVEN PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 29.38 TRAVEL TIME(MIN.) _ .29 TC(MIN.) = 10.46 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 5.00 TO NODE 5.00 IS CODE = 8 --------------------------------------------------------------------- >> >>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<< <<< 50 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.682 SOIL CLASSIFICATION IS "D" SINGLE FAMILY DEVELOPMENT RUNOFF COEFFICIENT = .5500 SUBAREA AREA(ACRES) = 4.00 SUBAREA RUNOFF(CFS) = 8.10 TOTAL AREA(ACRES) = 18.00 TOTAL RUNOFF(CFS) = 37.48 TC(MIN) = 10.46 k******************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 5.00 TO NODE 6.10 IS CODE = 4 --------------------------------------------------------------- - - - - -- >> >>>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<< <<< >> >>>USING USER - SPECIFIED PIPESIZE<< <<< ------------------------- ------------------ PIPEFLOW VELOCITY(FEET /SEC.) = 21.2 UPSTREAM NODE ELEVATION = 234.00 DOWNSTREAM NODE ELEVATION = 208.00 FLOWLENGTH(FEET) = 365.00 MANNING'S N = .013 GIVEN PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 37.48 TRAVEL TIME(MIN.) _ .29 TC(MIN.) = 10.75 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 6.10 TO NODE 6.10 IS CODE = 8 ---------------------------------------------------------------------------- >> >>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<< <<< 50 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.618 SOIL CLASSIFICATION IS "D" SINGLE FAMILY DEVELOPMENT RUNOFF COEFFICIENT = .5500 SUBAREA AREA(ACRES) = 16.00 SUBAREA RUNOFF(CFS) = 31.84 TOTAL AREA(ACRES) = 34.00 TOTAL RUNOFF(CFS) = 69.31 TC(MIN) = 10.75 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 6.10 TO NODE 6.10 IS CODE = 1 ---------------------------------------------------------------------------- >> >>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE« <<< TOTAL NUMBER OF STREAMS = 2 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE: TIME OF CONCENTRATION(MIN.) = 10.75 RAINFALL INTENSITY(INCH /HR) = 3.62 TOTAL STREAM AREA(ACRES) = 34.00 PEAK FLOW RATE(CFS) AT CONFLUENCE = 69.31 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 6.00 TO NODE 6.10 IS CODE = 21 ------------------------------------------------------------------------ >> >>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<< <<< SOIL CLASSIFICATION IS "D" SINGLE FAMILY DEVELOPMENT RUNOFF COEFFICIENT = .5500 INITIAL SUBAREA FLOW - LENGTH = 700.00 UPSTREAM ELEVATION = 275.00 DOWNSTREAM ELEVATION = 216.00 ELEVATION DIFFERENCE = 59.00 URBAN SUBAREA OVERLAND TIME OF FLOW(MINUTES) = 12.872 *CAUTION: SUBAREA SLOPE EXCEEDS COUNTY NOMOGRAPH DEFINITION. EXTRAPOLATION OF NOMOGRAPH USED. *CAUTION: SUBAREA FLOWLENGTH EXCEEDS COUNTY NOMOGRAPH DEFINITION. EXTRAPOLATION OF NOMOGRAPH USED. 50 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.221 SUBAREA RUNOFF(CFS) = 5.67 TOTAL AREA(ACRES) = 3.20 TOTAL RUNOFF(CFS) = 5.67 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 6.10 TO NODE 6.10 IS CODE = 8 -------------------------------------------------------------- >> >>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<< <<< 50 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.221 SOIL CLASSIFICATION IS "D" SINGLE FAMILY DEVELOPMENT RUNOFF COEFFICIENT = .5500 SUBAREA AREA(ACRES) _ .20 SUBAREA RUNOFF(CFS) _ .35 TOTAL AREA(ACRES) = 3.40 TOTAL RUNOFF(CFS) = 6.02 TC(MIN) = 12.87 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 6.10 TO NODE 6.10 IS CODE = 1 >> >>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE« <<< >> >>>AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES<< <<< TOTAL NUMBER OF STREAMS = 2 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE: TIME OF CONCENTRATION(MIN.) = 12.87 RAINFALL INTENSITY(INCH /HR) = 3.22 TOTAL STREAM AREA(ACRES) = 3.40 PEAK FLOW RATE(CFS) AT CONFLUENCE = 6.02 ** CONFLUENCE DATA ** STREAM RUNOFF Tc INTENSITY AREA NUMBER (CFS) (MIN.) (INCH /HOUR) (ACRE) 1 69.31 10.75 3.618 34.00 2 6.02 12.87 3.221 3.40 RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO CONFLUENCE FORMULA USED FOR 2 STREAMS. ** PEAK FLOW RATE TABLE ** STREAM RUNOFF NUMBER (CFS) 1 74.68 2 67.74 COMPUTED CONFLUENCE PEAK FLOW RATE(CFS) TOTAL AREA(ACRES) _ Tc (MIN.) 10.75 12.87 ESTIMATES 74. 37.40 INTENSITY ( INCH /HOUR) 3.618 3.221 ARE AS FOLLOWS: 68 Tc (MIN. ) = 10.75 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 6.20 TO NODE 7.10 IS CODE = 4 >> >>> COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<< <<< >> >>>USING USER - SPECIFIED PIPESIZE<< <<< DEPTH OF FLOW IN 36.0 INCH PIPE IS 17.1 INCHES PIPEFLOW VELOCITY(FEET /SEC.) = 22.6 UPSTREAM NODE ELEVATION = 207.00 DOWNSTREAM NODE ELEVATION = 199.00 FLOWLENGTH(FEET) = 120.00 MANNING'S N = .013 GIVEN PIPE DIAMETER(INCH) = 36.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 74.68 TRAVEL TIME(MIN.) _ .09 TC(MIN.) = 10.84 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 7.10 TO NODE 7.10 IS CODE = 1 ---------------------------------------------------------------------------- >> >>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE« <<< TOTAL NUMBER OF STREAMS = 2 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE: TIME OF CONCENTRATION(MIN.) = 10.84 RAINFALL INTENSITY(INCH /HR) = 3.60 TOTAL STREAM AREA(ACRES) = 37.40 PEAK FLOW RATE(CFS) AT CONFLUENCE = 74.68 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 7.00 TO NODE 7.10 IS CODE = 21 ---------------------------------------------------------------------------- >> >>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<< <<< SOIL CLASSIFICATION IS "D" SINGLE FAMILY DEVELOPMENT RUNOFF COEFFICIENT = .5500 INITIAL SUBAREA FLOW - LENGTH = 940.00 UPSTREAM ELEVATION = 280.00 DOWNSTREAM ELEVATION = 210.00 ELEVATION DIFFERENCE = 70.00 URBAN SUBAREA OVERLAND TIME OF FLOW(MINUTES) = 15.544 *CAUTION: SUBAREA SLOPE EXCEEDS COUNTY NOMOGRAPH DEFINITION. EXTRAPOLATION OF NOMOGRAPH USED. *CAUTION: SUBAREA FLOWLENGTH EXCEEDS COUNTY NOMOGRAPH DEFINITION. EXTRAPOLATION OF NOMOGRAPH USED. 50 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.852 SUBAREA RUNOFF(CFS) = 10.51 TOTAL AREA(ACRES) = 6.70 TOTAL RUNOFF(CFS) = 10.51 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 7.10 TO NODE 7.10 IS CODE = 1 >> >>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE« <<< >> >>>AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES<< <<< TOTAL NUMBER OF STREAMS = 2 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE: TIME OF CONCENTRATION(MIN.) = 15.54 RAINFALL INTENSITY(INCH /HR) = 2.85 TOTAL STREAM AREA(ACRES) = 6.70 PEAK FLOW RATE(CFS) AT CONFLUENCE = 10.51 ** CONFLUENCE DATA ** STREAM RUNOFF Tc INTENSITY AREA NUMBER (CFS) (MIN.) (INCH /HOUR) (ACRE) 1 74.68 10.84 3.599 37.40 2 10.51 15.54 2.852 6.70 RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO CONFLUENCE FORMULA USED FOR 2 STREAMS. ** PEAK FLOW RATE TABLE ** STREAM RUNOFF Tc INTENSITY NUMBER (CFS) (MIN.) (INCH /HOUR) 1 83.01 10.84 3.599 2 69.70 15.54 2.852 COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS: PEAK FLOW RATE(CFS) = 83.01 Tc(MIN.) = 10.84 TOTAL AREA(ACRES) = 44.10 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 7.10 TO NODE 9.10 IS CODE = 4 >> >>>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<< <<< >> >>>USING USER - SPECIFIED PIPESIZE<< <<< ----------------------- ------------------- DEPTH OF FLOW IN 36.0 INCH PIPE IS 28.7 INCHES PIPEFLOW VELOCITY(FEET /SEC.) = 13.8 UPSTREAM NODE ELEVATION = 199.00 DOWNSTREAM NODE ELEVATION = 196.00 FLOWLENGTH(FEET) = 165.00 MANNING'S N = .013 GIVEN PIPE DIAMETER(INCH) = 36.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 83.01 TRAVEL TIME(MIN.) = .20 TC(MIN.) = 11.04 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 9.10 TO NODE 9.10 IS CODE = 1 ------------------------------------------------------------------------- >> >>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE« <<< TOTAL NUMBER OF STREAMS = 2 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE: TIME OF CONCENTRATION(MIN.) = 11.04 RAINFALL INTENSITY(INCH /HR) = 3.56 TOTAL STREAM AREA(ACRES) = 44.10 PEAK FLOW RATE(CFS) AT CONFLUENCE = 83.01 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 8.00 TO NODE 8.10 IS CODE = 21 --------------------------------------------------------------------- >> >>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<< <<< ----------------------------------------- SOIL CLASSIFICATION IS "D" SINGLE FAMILY DEVELOPMENT RUNOFF COEFFICIENT = .5500 INITIAL SUBAREA FLOW - LENGTH = 1000.00 UPSTREAM ELEVATION = 265.00 DOWNSTREAM ELEVATION = 225.00 ELEVATION DIFFERENCE = 40.00 URBAN SUBAREA OVERLAND TIME OF FLOW(MINUTES) = 19.723 *CAUTION: SUBAREA SLOPE EXCEEDS COUNTY NOMOGRAPH DEFINITION. EXTRAPOLATION OF NOMOGRAPH USED. *CAUTION: SUBAREA FLOWLENGTH EXCEEDS COUNTY NOMOGRAPH DEFINITION. EXTRAPOLATION OF NOMOGRAPH USED. 50 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.446 SUBAREA RUNOFF(CFS) = 7.94 TOTAL AREA(ACRES) = 5.90 TOTAL RUNOFF(CFS) = 7.94 FLOW PROCESS FROM NODE 8.10 TO NODE 8.20 IS CODE = 6 ----------------------------------------------------------------------- >> >>>COMPUTE STREETFLOW TRAVELTIME THRU SUBAREA<< <<< ----------------------- -------------------- UPSTREAM ELEVATION = 225.00 DOWNSTREAM ELEVATION = 206.00 STREET LENGTH(FEET) = 600.00 CURB HEIGHT(INCHES) = 6. STREET HALFWIDTH(FEET) = 12.00 DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK = 10.00 INTERIOR STREET CROSSFALL(DECIMAL) _ .020 OUTSIDE STREET CROSSFALL(DECIMAL) _ .020 SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1 * *TRAVELTIME COMPUTED USING MEAN FLOW(CFS) = 9.88 * * *STREETFLOW SPLITS OVER STREET - CROWN * ** FULL DEPTH(FEET) _ .37 FLOODWIDTH(FEET) = 12.00 FULL HALF- STREET VELOCITY(FEET /SEC.) = 4.42 SPLIT DEPTH(FEET) _ .29 SPLIT FLOODWIDTH(FEET) = 8.39 SPLIT FLOW(CFS) = 2.99 SPLIT VELOCITY(FEET /SEC.) = 3.64 STREETFLOW MODEL RESULTS: STREET FLOWDEPTH(FEET) _ .37 HALFSTREET FLOODWIDTH(FEET) = 12.00 AVERAGE FLOW VELOCITY(FEET /SEC.) = 4.42 PRODUCT OF DEPTH &VELOCITY = 1.62 STREETFLOW TRAVELTIME(MIN) = 2.26 TC(MIN) = 21.98 50 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.281 SOIL CLASSIFICATION IS "D" SINGLE FAMILY DEVELOPMENT RUNOFF COEFFICIENT = .5500 SUBAREA AREA(ACRES) = 3.10 SUBAREA RUNOFF(CFS) = 3.89 SUMMED AREA(ACRES) = 9.00 TOTAL RUNOFF(CFS) = 11.83 END OF SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) _ .37 HALFSTREET FLOODWIDTH(FEET) = 12.00 FLOW VELOCITY(FEET /SEC.) = 4.42 DEPTH *VELOCITY = 1.62 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 8.20 TO NODE 9.00 IS CODE = 4 >> >>>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<< <<< >> >>> USING USER - SPECIFIED PIPESIZE<< <<< DEPTH OF FLOW IN 18.0 INCH PIPE IS 11.6 INCHES PIPEFLOW VELOCITY(FEET /SEC.) = 9.8 UPSTREAM NODE ELEVATION = 200.00 DOWNSTREAM NODE ELEVATION = 199.00 FLOWLENGTH(FEET) = 40.00 MANNING'S N = .013 GIVEN PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 11.83 TRAVEL TIME(MIN.) _ .07 TC(MIN.) = 22.05 ************ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 9.00 TO NODE ------------------------------------------- >> >>>ADDITION OF SUBAREA TO MAINLINE PEAK SO YEAR RAINFALL INTENSITY(INCH /HOUR) _ SOIL CLASSIFICATION IS "D" COMMERCIAL DEVELOPMENT RUNOFF COEFFICIENT ** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** 9.00 IS CODE = 8 --------------------------------- FLOW<< << < 2.276 .8500 SUBAREA AREA(ACRES) _ .50 SUBAREA RUNOFF(CFS) _ .97 TOTAL AREA(ACRES) = 9.50 TOTAL RUNOFF(CFS) = 12.79 TC (MIN) = 22.05 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 9.00 TO NODE 9.10 IS CODE = 4 >> >>> COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<< <<< >> >>>USING USER - SPECIFIED PIPESIZE« <<< ------------------------ ------------------ DEPTH OF FLOW IN 18.0 INCH PIPE IS 12.7 INCHES PIPEFLOW VELOCITY(FEET /SEC.) = 9.6 UPSTREAM NODE ELEVATION = 199.00 DOWNSTREAM NODE ELEVATION = 196.00 FLOWLENGTH(FEET) = 130.00 MANNING'S N = .013 GIVEN PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 12.79 TRAVEL TIME(MIN.) _ .23 TC(MIN.) = 22.28 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 9.10 TO NODE 9.10 IS CODE = 1 >> >>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE« <<< >> >>>AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES<< <<< TOTAL NUMBER OF STREAMS = 2 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE: TIME OF CONCENTRATION(MIN.) = 22.28 RAINFALL INTENSITY(INCH /HR) = 2.26 TOTAL STREAM AREA(ACRES) = 9.50 PEAK FLOW RATE(CFS) AT CONFLUENCE = 12.79 ** CONFLUENCE DATA ** STREAM RUNOFF Tc INTENSITY AREA NUMBER (CFS) (MIN.) (INCH /HOUR) (ACRE) 1 83.01 11.04 3.557 44.10 2 12.79 22.28 2.261 9.50 RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO CONFLUENCE FORMULA USED FOR 2 STREAMS. ** PEAK FLOW RATE TABLE ** STREAM RUNOFF NUMBER (CFS) 1 91.14 2 65.57 COMPUTED CONFLUENCE PEAK FLOW RATE(CFS) TOTAL AREA(ACRES) _ Tc (MIN.) 11.04 22.28 ESTIMATES 91. 53.60 INTENSITY (INCH /HOUR) 3.557 2.261 ARE AS FOLLOWS: 14 Tc (MIN. ) = 11.04 FLOW PROCESS FROM NODE 9.10 TO NODE 10.20 IS CODE = 4 ------------------------------------------------------------------- >> >>> COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<< <<< >> >>>USING USER - SPECIFIED PIPESIZE« <<< DEPTH OF FLOW IN 36.0 INCH PIPE IS 26.8 INCHES PIPEFLOW VELOCITY(FEET /SEC.) = 16.2 UPSTREAM NODE ELEVATION = 196.00 DOWNSTREAM NODE ELEVATION = 193.00 FLOWLENGTH(FEET) = 118.00 MANNING'S N = .013 GIVEN PIPE DIAMETER(INCH) = 36.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 91.14 TRAVEL TIME(MIN.) _ .12 TC(MIN.) = 11.16 FLOW PROCESS FROM NODE 10.20 TO NODE 10.20 IS CODE = 1 ---------------------------------------------------------------------------- >> >>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE<< <<< TOTAL NUMBER OF STREAMS = 2 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE: TIME OF CONCENTRATION(MIN.) = 11.16 RAINFALL INTENSITY(INCH /HR) = 3.53 TOTAL STREAM AREA(ACRES) = 53.60 PEAK FLOW RATE(CFS) AT CONFLUENCE = 91.14 FLOW PROCESS FROM NODE 10.00 TO NODE 10.10 IS CODE = 21 ------------------------------------------------------------------------ >> >>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<< <<< SOIL CLASSIFICATION IS "D" SINGLE FAMILY DEVELOPMENT RUNOFF COEFFICIENT = .5500 INITIAL SUBAREA FLOW- LENGTH = 300.00 UPSTREAM ELEVATION = 222.00 DOWNSTREAM ELEVATION = 202.00 ELEVATION DIFFERENCE = 20.00 URBAN SUBAREA OVERLAND TIME OF FLOW(MINUTES) = 9.111 *CAUTION: SUBAREA SLOPE EXCEEDS COUNTY NOMOGRAPH DEFINITION. EXTRAPOLATION OF NOMOGRAPH USED. 50 YEAR RAINFALL INTENSITY(INCH /HOUR) = 4.026 SUBAREA RUNOFF(CFS) = 3.99 TOTAL AREA(ACRES) = 1.80 TOTAL RUNOFF(CFS) = 3.99 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 10.10 TO NODE 10.20 IS CODE = 4 >> >>>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<< <<< >> >>>USING USER - SPECIFIED PIPESIZE<< <<< DEPTH OF FLOW IN 18.0 INCH PIPE IS 4.4 INCHES PIPEFLOW VELOCITY(FEET /SEC.) = 12.0 UPSTREAM NODE ELEVATION = 202.00 DOWNSTREAM NODE ELEVATION = 193.00 FLOWLENGTH(FEET) = 95.00 MANNING'S N = .013 GIVEN PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 3.99 TRAVEL TIME(MIN.) _ .13 TC(MIN.) = 9.24 FLOW PROCESS FROM NODE 10.20 TO NODE 10.20 IS CODE = 1 >> >>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE« <<< >> >>>AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES<< <<< -------------------------------- TOTAL NUMBER OF STREAMS = 2 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE: TIME OF CONCENTRATION(MIN.) = 9.24 RAINFALL INTENSITY(INCH /HR) = 3.99 TOTAL STREAM AREA(ACRES) = 1.80 PEAK FLOW RATE(CFS) AT CONFLUENCE = 3.99 ** CONFLUENCE DATA ** STREAM RUNOFF Tc INTENSITY AREA NUMBER (CFS) (MIN.) (INCH /HOUR) (ACRE) 1 91.14 11.16 3.532 53.60 2 3.99 9.24 3.988 1.80 RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO CONFLUENCE FORMULA USED FOR 2 STREAMS. ** PEAK FLOW RATE TABLE ** STREAM RUNOFF Tc INTENSITY NUMBER (CFS) (MIN.) (INCH /HOUR) 1 84.69 9.24 3.988 2 94.67 11.16 3.532 COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS: PEAK FLOW RATE(CFS) = 94.67 Tc(MIN.) = 11.16 TOTAL AREA(ACRES) = 55.40 -------------------------------- ------ END OF STUDY SUMMARY: PEAK FLOW RATE(CFS) = 94.67 Tc(MIN.) = 11.16 TOTAL AREA(ACRES) = 55.40 ------------------------------- ------ END OF RATIONAL METHOD ANALYSIS ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** RATIONAL METHOD HYDROLOGY COMPUTER PROGRAM PACKAGE Reference: SAN DIEGO COUNTY FLOOD CONTROL DISTRICT 1985,1981 HYDROLOGY MANUAL (c) Copyright 1982 -94 Advanced Engineering Software (aes) Ver. 1.5A Release Date: 3/16/94 License ID 1415 Analysis prepared by: Nolte and Associates, Inc. 5469 Kearny Villa Road, Suite 305 San Diego, CA 92123 * * * * * * * * * * * * * * * * * * * * * * * * ** DESCRIPTION OF STUDY * * * * * * * * * * * * * * * * * * * * * * * * ** k LEUCADIA BLVD * ULTIMATE CONDITION 100 YR ANALYSIS t LINES Al, A2, A3, A4, & A5 ******************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FILE NAME: LINEA.DAT TIME /DATE OF STUDY: 15: 6 3/25/1996 ---------------------------------------------------------------------------- USER SPECIFIED HYDROLOGY AND HYDRAULIC MODEL INFORMATION: ---------------------------------------------------------------------------- 1985 SAN DIEGO MANUAL CRITERIA USER SPECIFIED STORM EVENT(YEAR) = 100.00 6 -HOUR DURATION PRECIPITATION (INCHES) = 2.600 SPECIFIED MINIMUM PIPE SIZE(INCH) = 18.00 _. SPECIFIED PERCENT OF GRADIENTS(DECIMAL) TO USE FOR FRICTION SLOPE _ .90 SAN DIEGO HYDROLOGY MANUAL "C "- VALUES USED NOTE: ONLY PEAK CONFLUENCE VALUES CONSIDERED FLOW PROCESS FROM NODE 1.00 TO NODE 1.10 IS CODE = 21 ---------------------------------------------------------------------------- >> >>> RATIONAL METHOD INITIAL SUBAREA ANALYSIS<< <<< SOIL CLASSIFICATION IS "D" COMMERCIAL DEVELOPMENT RUNOFF COEFFICIENT = .8500 INITIAL SUBAREA FLOW - LENGTH = 540.00 UPSTREAM ELEVATION = 317.00 DOWNSTREAM ELEVATION = 306.00 ELEVATION DIFFERENCE = 11.00 URBAN SUBAREA OVERLAND TIME OF FLOW(MINUTES) = 8.249 *CAUTION: SUBAREA FLOWLENGTH EXCEEDS COUNTY NOMOGRAPH DEFINITION. EXTRAPOLATION OF NOMOGRAPH USED. 100 YEAR RAINFALL INTENSITY(INCH /HOUR) = 4.960 SUBAREA RUNOFF(CFS) = 2.95 TOTAL AREA(ACRES) _ .70 TOTAL RUNOFF(CFS) = 2.95 FLOW PROCESS FROM NODE 1.10 TO NODE 1.20 IS CODE = 6 ---------------------------------------------------------------------------- >> >>>COMPUTE STREETFLOW TRAVELTIME THRU SUBAREA<< <<< ---------------------------- - - ---- UPSTREAM ELEVATION = 306.00 DOWNSTREAM ELEVATION = 280.00 STREET LENGTH(FEET) = 470.00 CURB HEIGHT(INCHES) = 6. STREET HALFWIDTH(FEET) = 40.00 DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK = 38.50 INTERIOR STREET CROSSFALL(DECIMAL) = .020 OUTSIDE STREET CROSSFALL(DECIMAL) = .087 SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1 * *TRAVELTIME COMPUTED USING MEAN FLOW(CFS) = 6.17 STREETFLOW MODEL RESULTS: STREET FLOWDEPTH(FEET) _ .33 HALFSTREET FLOODWIDTH(FEET) = 10.22 AVERAGE FLOW VELOCITY(FEET /SEC.) = 5.31 PRODUCT OF DEPTH &VELOCITY = 1.76 STREETFLOW TRAVELTIME(MIN) = 1.48 TC(MIN) = 9.73 100 YEAR RAINFALL INTENSITY(INCH /HOUR) = 4.460 SOIL CLASSIFICATION IS "D" SINGLE FAMILY DEVELOPMENT RUNOFF COEFFICIENT = .5500 SUBAREA AREA(ACRES) = 2.60 SUBAREA RUNOFF(CFS) = 6.38 SUMMED AREA(ACRES) = 3.30 TOTAL RUNOFF(CFS) = 9.33 END OF SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) = .37 HALFSTREET FLOODWIDTH(FEET) = 12.03 FLOW VELOCITY(FEET /SEC.) = 5.96 DEPTH *VELOCITY = 2.19 FLOW PROCESS FROM NODE 1.20 TO NODE 2.20 IS CODE = 4 >> >>>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<< <<< >> >>> USING USER - SPECIFIED PIPESIZE<< <<< ---------------------------- ------------- DEPTH OF FLOW IN 18.0 INCH PIPE IS 12.6 INCHES PIPEFLOW VELOCITY(FEET /SEC.) = 7.1 UPSTREAM NODE ELEVATION = 274.00 DOWNSTREAM NODE ELEVATION = 273.00 FLOWLENGTH(FEET) = 80.00 MANNING'S N = .013 GIVEN PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 9.33 TRAVEL TIME(MIN.) = .19 TC(MIN.) = 9.91 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 2.10 TO NODE 2.10 IS CODE = 1 ---------------------------------------------------------------------------- >> >>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE« <<< TOTAL NUMBER OF STREAMS = 2 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE: TIME OF CONCENTRATION(MIN.) = 9.91 RAINFALL INTENSITY(INCH /HR) = 4.41 TOTAL STREAM AREA(ACRES) = 3.30 PEAK FLOW RATE(CFS) AT CONFLUENCE = 9.33 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** _ FLOW PROCESS FROM NODE 2.00 TO NODE 2.10 IS CODE = 21 ---------------------------------------------------------------------------- >> >>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<< <<< ----------------------------- ------ SOIL CLASSIFICATION IS "D" COMMERCIAL DEVELOPMENT RUNOFF COEFFICIENT = .8500 INITIAL SUBAREA FLOW- LENGTH = 540.00 UPSTREAM ELEVATION = 317.00 DOWNSTREAM ELEVATION = 306.00 ELEVATION DIFFERENCE = 11.00 URBAN SUBAREA OVERLAND TIME OF FLOW(MINUTES) = 8.249 *CAUTION: SUBAREA FLOWLENGTH EXCEEDS COUNTY NOMOGRAPH DEFINITION. EXTRAPOLATION OF NOMOGRAPH USED. 100 YEAR RAINFALL INTENSITY(INCH /HOUR) = 4.960 SUBAREA RUNOFF(CFS) = 3.79 TOTAL AREA(ACRES) = .90 TOTAL RUNOFF(CFS) = 3.79 FLOW PROCESS FROM NODE 2.10 TO NODE 2.20 IS CODE = 6 ---------------------------------------------------------------------------- >> >>> COMPUTE STREETFLOW TRAVELTIME THRU SUBAREA<< <<< ------------------------------- ------------- UPSTREAM ELEVATION = 306.00 DOWNSTREAM ELEVATION = 280.00 STREET LENGTH(FEET) = 470.00 CURB HEIGHT(INCHES) = 6. STREET HALFWIDTH(FEET) = 40.00 DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK = 38.50 INTERIOR STREET CROSSFALL(DECIMAL) = .020 OUTSIDE STREET CROSSFALL(DECIMAL) = .087 SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1 * *TRAVELTIME COMPUTED USING MEAN FLOW(CFS) = 5.89 STREETFLOW MODEL RESULTS: STREET FLOWDEPTH(FEET) _ .33 HALFSTREET FLOODWIDTH(FEET) = 10.22 AVERAGE FLOW VELOCITY(FEET /SEC.) = 5.07 PRODUCT OF DEPTH &VELOCITY = 1.68 STREETFLOW TRAVELTIME(MIN) = 1.55 TC(MIN) = 9.80 100 YEAR RAINFALL INTENSITY(INCH /HOUR) = 4.440 SOIL CLASSIFICATION IS "D" SINGLE FAMILY DEVELOPMENT RUNOFF COEFFICIENT = .5500 SUBAREA AREA(ACRES) = 1.70 SUBAREA RUNOFF(CFS) = 4.15 SUMMED AREA(ACRES) = 2.60 TOTAL RUNOFF(CFS) = 7.95 END OF SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) = .35 HALFSTREET FLOODWIDTH(FEET) = 11.43 FLOW VELOCITY(FEET /SEC.) = 5.58 DEPTH *VELOCITY = 1.98 FLOW PROCESS FROM NODE 2.10 TO NODE 2.10 IS CODE = 1 ---------------------------------------------------------------------------- >> >>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE« <<< >> >>>AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES<< <<< TOTAL NUMBER OF STREAMS = 2 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE: TIME OF CONCENTRATION(MIN.) = 9.80 RAINFALL INTENSITY(INCH /HR) = 4.44 TOTAL STREAM AREA(ACRES) = 2.60 PEAK FLOW RATE(CFS) AT CONFLUENCE = 7.95 ** CONFLUENCE DATA ** STREAM RUNOFF Tc INTENSITY AREA NUMBER (CFS) (MIN.) (INCH /HOUR) (ACRE) 1 9.33 9.91 4.405 3.30 2 7.95 9.80 4.440 2.60 RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO CONFLUENCE FORMULA USED FOR 2 STREAMS. ** PEAK FLOW RATE TABLE ** STREAM RUNOFF Tc NUMBER (CFS) (MIN.) 1 17.20 9.80 2 17.21 9.91 COMPUTED CONFLUENCE ESTIMATES PEAK FLOW RATE(CFS) = 17. TOTAL AREA(ACRES) = 5.90 INTENSITY ( INCH /HOUR) 4.440 4.405 ARE AS FOLLOWS: 21 Tc (MIN. ) = 9.91 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 2.10 TO NODE 3.00 IS CODE = 4 >> >>>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<< <<< >> >>>USING USER - SPECIFIED PIPESIZE« <<< ------------------------------------- DEPTH OF FLOW IN 18.0 INCH PIPE IS 10.8 INCHES PIPEFLOW VELOCITY(FEET /SEC.) = 15.6 UPSTREAM NODE ELEVATION = 273.00 DOWNSTREAM NODE ELEVATION = 272.00 FLOWLENGTH(FEET) = 15.00 MANNING'S N = .013 GIVEN PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 17.21 TRAVEL TIME(MIN.) _ .02 TC(MIN.) = 9.93 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 3.00 TO NODE 3.00 IS CODE = 8 ---------------------------------------------------------------------------- >> >>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<< <<< 100 YEAR RAINFALL INTENSITY(INCH /HOUR) = 4.401 SOIL CLASSIFICATION IS "D" SINGLE FAMILY DEVELOPMENT RUNOFF COEFFICIENT = .5500 SUBAREA AREA(ACRES) = 5.60 SUBAREA RUNOFF(CFS) = 13.55 TOTAL AREA(ACRES) = 11.50 TOTAL RUNOFF(CFS) = 30.77 TC (MIN) = 9.93 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 3.00 TO NODE 4.20 IS CODE = 4 ---------------------------------------------------------------------- - - - - -- >> >>>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<< <<< >> >>>USING USER - SPECIFIED PIPESIZE« <<< -------------------------- PIPEFLOW VELOCITY(FEET /SEC.) = 17.4 UPSTREAM NODE ELEVATION = 272.00 DOWNSTREAM NODE ELEVATION = 258.50 FLOWLENGTH(FEET) = 190.00 MANNING'S N = .013 GIVEN PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 30.77 TRAVEL TIME(MIN.) _ .18 TC(MIN.) = 10.11 k******************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 4.20 TO NODE 4.20 IS CODE = 1 ---------------------------------------------------------------------------- >> >>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE« <<< TOTAL NUMBER OF STREAMS = 2 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE: TIME OF CONCENTRATION(MIN.) = 10.11 RAINFALL INTENSITY(INCH /HR) = 4.35 TOTAL STREAM AREA(ACRES) = 11.50 PEAK FLOW RATE(CFS) AT CONFLUENCE = 30.77 FLOW PROCESS FROM NODE 4.00 TO NODE 4.10 IS CODE = 21 ---------------------------------------------------------------------------- >> >>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<< <<< SOIL CLASSIFICATION IS "D" SINGLE FAMILY DEVELOPMENT RUNOFF COEFFICIENT = .5500 INITIAL SUBAREA FLOW - LENGTH = 500.00 UPSTREAM ELEVATION = 275.00 DOWNSTREAM ELEVATION = 262.00 ELEVATION DIFFERENCE = 13.00 URBAN SUBAREA OVERLAND TIME OF FLOW(MINUTES) = 16.099 *CAUTION: SUBAREA SLOPE EXCEEDS COUNTY NOMOGRAPH DEFINITION. EXTRAPOLATION OF NOMOGRAPH USED. 100 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.222 SUBAREA RUNOFF(CFS) = 4.43 TOTAL AREA(ACRES) = 2.50 TOTAL RUNOFF(CFS) = 4.43 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 4.10 TO NODE 4.20 IS CODE = 4 >> >>> COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<< <<< >> >>>USING USER - SPECIFIED PIPESIZE<< <<< ---------------------------------- DEPTH OF FLOW IN 18.0 INCH PIPE IS 6.5 INCHES PIPEFLOW VELOCITY(FEET /SEC.) = 7.7 UPSTREAM NODE ELEVATION = 260.00 DOWNSTREAM NODE ELEVATION = 258.50 FLOWLENGTH(FEET) = 60.00 MANNING'S N = .013 GIVEN PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 4.43 TRAVEL TIME(MIN.) _ .13 TC(MIN.) = 16.23 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 4.20 TO NODE 4.20 IS CODE = 1 --------------------------------------------------------------------------- >> >>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE<< <<< >> >>>AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES<< <<< TOTAL NUMBER OF STREAMS = 2 ---------------------------- ------- CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE: TIME OF CONCENTRATION(MIN.) = 16.23 RAINFALL INTENSITY(INCH /HR) = 3.21 TOTAL STREAM AREA(ACRES) = 2.50 PEAK FLOW RATE(CFS) AT CONFLUENCE = 4.43 ** CONFLUENCE DATA ** STREAM RUNOFF Tc INTENSITY AREA NUMBER (CFS) (MIN.) (INCH /HOUR) (ACRE) 1 30.77 10.11 4.349 11.50 2 4.43 16.23 3.205 2.50 RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO CONFLUENCE FORMULA USED FOR 2 STREAMS. ** PEAK FLOW RATE TABLE ** STREAM RUNOFF Tc INTENSITY NUMBER (CFS) (MIN.) (INCH /HOUR) 1 34.03 10.11 4.349 2 27.11 16.23 3.205 COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS: PEAK FLOW RATE(CFS) = 34.03 Tc(MIN.) = 10.11 TOTAL AREA(ACRES) = 14.00 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 4.20 TO NODE 5.00 IS CODE = 4 >> >>>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<< <<< >> >>>USING USER - SPECIFIED PIPESIZE<< <<< -------- - - - - -- ----------------------------------------- PIPEFLOW VELOCITY(FEET /SEC.) = 19.3 UPSTREAM NODE ELEVATION = 258.50 DOWNSTREAM NODE ELEVATION = 234.00 FLOWLENGTH(FEET) = 285.00 MANNING'S N = .013 GIVEN PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 34.03 TRAVEL TIME(MIN.) = .25 TC(MIN.) = 10.36 ******************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 5.00 TO NODE 5.00 IS CODE = 8 --------------------------------------------------------------------------- >> >>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<< <<< 100 YEAR RAINFALL INTENSITY(INCH /HOUR) = 4.282 SOIL CLASSIFICATION IS "D" SINGLE FAMILY DEVELOPMENT RUNOFF COEFFICIENT = .5500 SUBAREA AREA(ACRES) = 4.00 SUBAREA RUNOFF(CFS) = 9.42 TOTAL AREA(ACRES) = 18.00 TOTAL RUNOFF(CFS) = 43.45 TC(MIN) = 10.36 _******************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 5.00 TO NODE 6.10 IS CODE = 4 ---------------------------------------------------------------------------- >> >>>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<< <<< >> >>>USING USER - SPECIFIED PIPESIZE<< <<< ---------------------------- -------------- PIPEFLOW VELOCITY(FEET /SEC.) = 24.6 UPSTREAM NODE ELEVATION = 234.00 DOWNSTREAM NODE ELEVATION = 208.00 FLOWLENGTH(FEET) = 365.00 MANNING'S N = .013 GIVEN PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 43.45 TRAVEL TIME(MIN.) = .25 TC(MIN.) = 10.61 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 6.10 TO NODE 6.10 IS CODE = 8 ---------------------------------------------------------------------------- >> >>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<< <<< 100 YEAR RAINFALL INTENSITY(INCH /HOUR) = 4.218 SOIL CLASSIFICATION IS "D" SINGLE FAMILY DEVELOPMENT RUNOFF COEFFICIENT = .5500 SUBAREA AREA(ACRES) = 16.00 SUBAREA RUNOFF(CFS) = 37.11 TOTAL AREA(ACRES) = 34.00 TOTAL RUNOFF(CFS) = 80.57 TC (MIN) = 10.61 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 6.10 TO NODE 6.10 IS CODE = 1 ---------------------------------------------------------------------------- >> >>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE« <<< TOTAL NUMBER OF STREAMS = 2 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE: TIME OF CONCENTRATION(MIN.) = 10.61 RAINFALL INTENSITY(INCH /HR) = 4.22 TOTAL STREAM AREA(ACRES) = 34.00 PEAK FLOW RATE(CFS) AT CONFLUENCE = 80.57 FLOW PROCESS FROM NODE 6.00 TO NODE 6.10 IS CODE = 21 ---------------------------------------------------------------------------- >> >>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<< <<< SOIL CLASSIFICATION IS "D" SINGLE FAMILY DEVELOPMENT RUNOFF COEFFICIENT = .5500 INITIAL SUBAREA FLOW- LENGTH = 700.00 UPSTREAM ELEVATION = 275.00 DOWNSTREAM ELEVATION = 216.00 ELEVATION DIFFERENCE = 59.00 URBAN SUBAREA OVERLAND TIME OF FLOW(MINUTES) = 12.872 *CAUTION: SUBAREA SLOPE EXCEEDS COUNTY NOMOGRAPH DEFINITION. EXTRAPOLATION OF NOMOGRAPH USED. *CAUTION: SUBAREA FLOWLENGTH EXCEEDS COUNTY NOMOGRAPH DEFINITION. EXTRAPOLATION OF NOMOGRAPH USED. 100 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.722 SUBAREA RUNOFF(CFS) = 6.55 TOTAL AREA(ACRES) = 3.20 TOTAL RUNOFF(CFS) = 6.55 ******************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 6.10 TO NODE 6.10 IS CODE = 8 ---------------------------------------------------------------------------- >> >>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<< <<< ------------------------------ 100 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.722 SOIL CLASSIFICATION IS "D" SINGLE FAMILY DEVELOPMENT RUNOFF COEFFICIENT = .5500 SUBAREA AREA(ACRES) _ .20 SUBAREA RUNOFF(CFS) _ .41 TOTAL AREA(ACRES) = 3.40 TOTAL RUNOFF(CFS) = 6.96 TC(MIN) = 12.87 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 6.10 TO NODE 6.10 IS CODE = 1 >> >>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE« <<< >> >>>AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES<< <<< ------------------------------------ TOTAL NUMBER OF STREAMS = 2 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE: TIME OF CONCENTRATION(MIN.) = 12.87 RAINFALL INTENSITY(INCH /HR) = 3.72 TOTAL STREAM AREA(ACRES) = 3.40 PEAK FLOW RATE(CFS) AT CONFLUENCE = 6.96 ** CONFLUENCE DATA ** STREAM RUNOFF Tc INTENSITY AREA NUMBER (CFS) (MIN.) (INCH /HOUR) (ACRE) 1 80.57 10.61 4.218 34.00 2 6.96 12.87 3.722 3.40 RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO CONFLUENCE FORMULA USED FOR 2 STREAMS. ** PEAK FLOW RATE TABLE ** STREAM RUNOFF NUMBER (CFS) 1 86.71 2 78.07 COMPUTED CONFLUENCE PEAK FLOW RATE(CFS) TOTAL AREA(ACRES) _ Tc (MIN.) 10.61 12.87 ESTIMATES 86. 37.40 INTENSITY (INCH /HOUR) 4.218 3.722 ARE AS FOLLOWS: 71 Tc (MIN. ) = 10.61 k******************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 6.20 TO NODE 7.10 IS CODE = 4 >> >>> COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<< <<< >> >>>USING USER - SPECIFIED PIPESIZE<< <<< ---------------------------------- - - ---- DEPTH OF FLOW IN 36.0 INCH PIPE IS 18.6 INCHES PIPEFLOW VELOCITY(FEET /SEC.) = 23.5 UPSTREAM NODE ELEVATION = 207.00 DOWNSTREAM NODE ELEVATION = 199.00 FLOWLENGTH(FEET) = 120.00 MANNING'S N = .013 GIVEN PIPE DIAMETER(INCH) = 36.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 86.71 TRAVEL TIME(MIN.) _ .09 TC(MIN.) = 10.69 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 7.10 TO NODE 7.10 IS CODE = 1 ---------------------------------------------------------------------------- >> >>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE« <<< TOTAL NUMBER OF STREAMS = 2 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE: TIME OF CONCENTRATION(MIN.) = 10.69 RAINFALL INTENSITY(INCH /HR) = 4.20 TOTAL STREAM AREA(ACRES) = 37.40 PEAK FLOW RATE(CFS) AT CONFLUENCE = 86.71 FLOW PROCESS FROM NODE 7.00 TO NODE 7.10 IS CODE = 21 ---------------------------------------------------------------------------- >> >>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<< <<< ------------------------------ ------ SOIL CLASSIFICATION IS "D" SINGLE FAMILY DEVELOPMENT RUNOFF COEFFICIENT = .5500 INITIAL SUBAREA FLOW- LENGTH = 940.00 UPSTREAM ELEVATION = 280.00 DOWNSTREAM ELEVATION = 210.00 ELEVATION DIFFERENCE = 70.00 URBAN SUBAREA OVERLAND TIME OF FLOW(MINUTES) = 15.544 *CAUTION: SUBAREA SLOPE EXCEEDS COUNTY NOMOGRAPH DEFINITION. EXTRAPOLATION OF NOMOGRAPH USED. *CAUTION: SUBAREA FLOWLENGTH EXCEEDS COUNTY NOMOGRAPH DEFINITION. EXTRAPOLATION OF NOMOGRAPH USED. 100 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.296 SUBAREA RUNOFF(CFS) = 12.15 TOTAL AREA(ACRES) = 6.70 TOTAL RUNOFF(CFS) = 12.15 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 7.10 TO NODE 7.10 IS CODE = 1 >> >>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE« <<< >> >>>AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES<< <<< -------------------------- -------------- TOTAL NUMBER OF STREAMS = 2 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE: TIME OF CONCENTRATION(MIN.) = 15.54 RAINFALL INTENSITY(INCH /HR) = 3.30 TOTAL STREAM AREA(ACRES) = 6.70 PEAK FLOW RATE(CFS) AT CONFLUENCE = 12.15 ** CONFLUENCE DATA ** STREAM RUNOFF Tc INTENSITY AREA NUMBER (CFS) (MIN.) (INCH /HOUR) (ACRE) 1 86.71 10.69 4.196 37.40 2 12.15 15.54 3.296 6.70 RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO CONFLUENCE FORMULA USED FOR 2 STREAMS. ** PEAK FLOW RATE TABLE ** STREAM RUNOFF Tc INTENSITY NUMBER (CFS) (MIN.) (INCH /HOUR) 1 96.25 10.69 4.196 2 80.26 15.54 3.296 COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS: PEAK FLOW RATE(CFS) = 96.25 Tc(MIN.) = 10.69 TOTAL AREA(ACRES) = 44.10 ******************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 7.10 TO NODE 9.10 IS CODE = 4 >> >>>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<< <<< >> >>>USING USER - SPECIFIED PIPESIZE<< <<< ----------------------------- --------------- PIPEFLOW VELOCITY(FEET /SEC.) = 13.6 UPSTREAM NODE ELEVATION = 199.00 DOWNSTREAM NODE ELEVATION = 196.00 FLOWLENGTH(FEET) = 165.00 MANNING'S N = .013 GIVEN PIPE DIAMETER(INCH) = 36.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 96.25 TRAVEL TIME(MIN.) _ .20 TC(MIN.) = 10.89 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 9.10 TO NODE 9.10 IS CODE = 1 --------------------------------------------------------------------------- >> >>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE« <<< TOTAL NUMBER OF STREAMS = 2 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE: TIME OF CONCENTRATION(MIN.) = 10.89 RAINFALL INTENSITY(INCH /HR) = 4.15 TOTAL STREAM AREA(ACRES) = 44.10 PEAK FLOW RATE(CFS) AT CONFLUENCE = 96.25 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 8.00 TO NODE 8.10 IS CODE = 21 --------------------------------------------------------------------------- >> >>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<< <<< SOIL CLASSIFICATION IS "D" SINGLE FAMILY DEVELOPMENT RUNOFF COEFFICIENT = .5500 INITIAL SUBAREA FLOW- LENGTH = 1000.00 UPSTREAM ELEVATION = 265.00 DOWNSTREAM ELEVATION = 225.00 ELEVATION DIFFERENCE = 40.00 URBAN SUBAREA OVERLAND TIME OF FLOW(MINUTES) = 19.723 *CAUTION: SUBAREA SLOPE EXCEEDS COUNTY NOMOGRAPH DEFINITION. EXTRAPOLATION OF NOMOGRAPH USED. *CAUTION: SUBAREA FLOWLENGTH EXCEEDS COUNTY NOMOGRAPH DEFINITION. EXTRAPOLATION OF NOMOGRAPH USED. 100 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.827 SUBAREA RUNOFF(CFS) = 9.17 TOTAL AREA(ACRES) = 5.90 TOTAL RUNOFF(CFS) = 9.17 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * FLOW PROCESS FROM NODE 8.10 TO NODE 8.20 IS CODE = 6 ------------------------------------------------------------------------- >> >>>COMPUTE STREETFLOW TRAVELTIME THRU SUBAREA<< <<< UPSTREAM ELEVATION = 225.00 DOWNSTREAM ELEVATION = 206.00 STREET LENGTH(FEET) = 600.00 CURB HEIGHT(INCHES) = 6. STREET HALFWIDTH(FEET) = 12.00 DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK = 10.00 INTERIOR STREET CROSSFALL(DECIMAL) = .020 OUTSIDE STREET CROSSFALL(DECIMAL) = .020 SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1 * *TRAVELTIME COMPUTED USING MEAN FLOW(CFS) = 11.42 * * *STREETFLOW SPLITS OVER STREET - CROWN * ** FULL DEPTH(FEET) = .37 FLOODWIDTH(FEET) = 12.00 FULL HALF- STREET VELOCITY(FEET /SEC.) = 4.42 SPLIT DEPTH(FEET) _ .33 SPLIT FLOODWIDTH(FEET) = 10.36 SPLIT FLOW(CFS) = 4.53 SPLIT VELOCITY(FEET /SEC.) = 3.80 STREETFLOW MODEL RESULTS: STREET FLOWDEPTH(FEET) _ .37 HALFSTREET FLOODWIDTH(FEET) = 12.00 AVERAGE FLOW VELOCITY(FEET /SEC.) = 4.42 PRODUCT OF DEPTH &VELOCITY = 1.62 STREETFLOW TRAVELTIME(MIN) = 2.26 TC(MIN) = 21.98 100 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.636 SOIL CLASSIFICATION IS "D" SINGLE FAMILY DEVELOPMENT RUNOFF COEFFICIENT = .5500 SUBAREA AREA(ACRES) = 3.10 SUBAREA RUNOFF(CFS) = 4.49 SUMMED AREA(ACRES) = 9.00 TOTAL RUNOFF(CFS) = 13.67 END OF SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) = .37 HALFSTREET FLOODWIDTH(FEET) = 12.00 FLOW VELOCITY(FEET /SEC.) = 4.42 DEPTH *VELOCITY = 1.62 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * FLOW PROCESS FROM NODE 8.20 TO NODE 9.00 IS CODE = 4 >> >>>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<< <<< >> >>> USING USER - SPECIFIED PIPESIZE<< <<< DEPTH OF FLOW IN 18.0 INCH PIPE IS 13.0 INCHES PIPEFLOW VELOCITY(FEET /SEC.) = 10.0 UPSTREAM NODE ELEVATION = 200.00 DOWNSTREAM NODE ELEVATION = 199.00 FLOWLENGTH(FEET) = 40.00 MANNING'S N = .013 GIVEN PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 13.67 TRAVEL TIME(MIN.) = .07 TC(MIN.) = 22.05 ******************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 9.00 TO NODE 9.00 IS CODE = 8 ----------------------------------------------------- >> >>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<< <<< 100 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.630 SOIL CLASSIFICATION IS "D" COMMERCIAL DEVELOPMENT RUNOFF COEFFICIENT = .8500 SUBAREA AREA(ACRES) _ .50 SUBAREA RUNOFF(CFS) = 1.12 TOTAL AREA(ACRES) = 9.50 TOTAL RUNOFF(CFS) = 14.78 TC(MIN) = 22.05 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 9.00 TO NODE 9.10 IS CODE = 4 >> >>> COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<< <<< >> >>>USING USER - SPECIFIED PIPESIZE« <<< DEPTH OF FLOW IN 18.0 INCH PIPE IS 14.4 INCHES PIPEFLOW VELOCITY(FEET /SEC.) = 9.8 UPSTREAM NODE ELEVATION = 199.00 DOWNSTREAM NODE ELEVATION = 196.00 FLOWLENGTH(FEET) = 130.00 MANNING'S N = .013 GIVEN PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 14.78 TRAVEL TIME(MIN.) _ .22 TC(MIN.) = 22.27 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 9.10 TO NODE 9.10 IS CODE = 1 ---------------------------------------------------------------------------- >> >>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE« <<< >> >>>AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES<< <<< TOTAL NUMBER OF STREAMS = 2 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE: TIME OF CONCENTRATION(MIN.) = 22.27 RAINFALL INTENSITY(INCH /HR) = 2.61 TOTAL STREAM AREA(ACRES) = 9.50 PEAK FLOW RATE(CFS) AT CONFLUENCE = 14.78 ** CONFLUENCE DATA ** STREAM RUNOFF Tc INTENSITY AREA NUMBER (CFS) (MIN.) (INCH /HOUR) (ACRE) 1 96.25 10.89 4.145 44.10 2 14.78 22.27 2.614 9.50 RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO CONFLUENCE FORMULA USED FOR 2 STREAMS. ** PEAK FLOW RATE TABLE ** STREAM RUNOFF Tc INTENSITY NUMBER (CFS) (MIN.) (INCH /HOUR) 1 105.57 10.89 4.145 2 75.47 22.27 2.614 COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS: PEAK FLOW RATE(CFS) = 105.57 Tc(MIN.) = 10.89 TOTAL AREA(ACRES) = 53.60 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 9.10 TO NODE 10.20 IS CODE = 4 --------------------------------------------------------------- >> >>> COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<< <<< >> >>>USING USER - SPECIFIED PIPESIZE« <<< PIPEFLOW VELOCITY(FEET /SEC.) = 14.9 UPSTREAM NODE ELEVATION = 196.00 DOWNSTREAM NODE ELEVATION = 193.00 FLOWLENGTH(FEET) = 118.00 MANNING'S N = .013 GIVEN PIPE DIAMETER(INCH) = 36.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 105.57 TRAVEL TIME(MIN.) = .13 TC(MIN.) = 11.03 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 10.20 TO NODE 10.20 IS CODE = 1 --------------------------------------------------------------------------- >> >>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE« <<< TOTAL NUMBER OF STREAMS = 2 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE: TIME OF CONCENTRATION(MIN.) = 11.03 RAINFALL INTENSITY(INCH /HR) = 4.11 TOTAL STREAM AREA(ACRES) = 53.60 PEAK FLOW RATE(CFS) AT CONFLUENCE = 105.57 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 10.00 TO NODE 10.10 IS CODE = 21 -------------------------------------------------------------------- >> >>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<< <<< SOIL CLASSIFICATION IS "D" SINGLE FAMILY DEVELOPMENT RUNOFF COEFFICIENT = .5500 INITIAL SUBAREA FLOW - LENGTH = 300.00 UPSTREAM ELEVATION = 222.00 DOWNSTREAM ELEVATION = 202.00 ELEVATION DIFFERENCE = 20.00 URBAN SUBAREA OVERLAND TIME OF FLOW(MINUTES) = 9.111 *CAUTION: SUBAREA SLOPE EXCEEDS COUNTY NOMOGRAPH DEFINITION. EXTRAPOLATION OF NOMOGRAPH USED. 100 YEAR RAINFALL INTENSITY(INCH /HOUR) = 4.652 SUBAREA RUNOFF(CFS) = 4.61 TOTAL AREA(ACRES) = 1.80 TOTAL RUNOFF(CFS) = 4.61 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 10.10 TO NODE 10.20 IS CODE = 4 >> >>> COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<< <<< >> >>>USING USER - SPECIFIED PIPESIZE<< <<< DEPTH OF FLOW IN 18.0 INCH PIPE IS 4.7 INCHES PIPEFLOW VELOCITY(FEET /SEC.) = 12.5 UPSTREAM NODE ELEVATION = 202.00 DOWNSTREAM NODE ELEVATION = 193.00 FLOWLENGTH(FEET) = 95.00 MANNING'S N = .013 GIVEN PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 4.61 TRAVEL TIME(MIN.) = .13 TC(MIN.) = 9.24 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 10.20 TO NODE 10.20 IS CODE = 1 ------------------------------------------------------------ >> >>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE« <<< >> >>>AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES<< <<< --------------------------- TOTAL NUMBER OF STREAMS = 2 - - - - -- CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE: TIME OF CONCENTRATION(MIN.) = 9.24 RAINFALL INTENSITY(INCH /HR) = 4.61 TOTAL STREAM AREA(ACRES) = 1.80 PEAK FLOW RATE(CFS) AT CONFLUENCE = 4.61 ** CONFLUENCE DATA ** STREAM RUNOFF Tc INTENSITY AREA NUMBER (CFS) (MIN.) (INCH /HOUR) (ACRE) 1 105.57 11.03 4.113 53.60 2 4.61 9.24 4.610 1.80 RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO CONFLUENCE FORMULA USED FOR 2 STREAMS. ** PEAK FLOW RATE TABLE ** STREAM RUNOFF Tc INTENSITY NUMBER (CFS) (MIN.) (INCH /HOUR) 1 98.80 9.24 4.610 2 109.68 11.03 4.113 COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS: PEAK FLOW RATE(CFS) = 109.68 Tc(MIN.) = 11.03 TOTAL AREA(ACRES) = 55.40 ----------------------------- END OF STUDY SUMMARY: --------- PEAK FLOW RATE(CFS) = 109.68 Tc(MIN.) = 11.03 TOTAL AREA(ACRES) = 55.40 --------------------------- END OF RATIONAL METHOD ANALYSIS ------------- RATIONAL METHOD HYDROLOGY COMPUTER PROGRAM PACKAGE Reference: SAN DIEGO COUNTY FLOOD CONTROL DISTRICT 1985,1981 HYDROLOGY MANUAL (c) Copyright 1982 -94 Advanced Engineering Software (aes) Ver. 1.5A Release Date: 3/16/94 License ID 1415 Analysis prepared by: Nolte and Associates, Inc. 5469 Kearny Villa Road, Suite 305 San Diego, CA 92123 * * * * * * * * * * * * * * * * * * * * * * * * ** • LEUCADIA BLVD • ULTIMATE CONDITION 100 YR • LINE B * * * * * * * * * * * * * * * * * * * * * * * * ** DESCRIPTION OF STUDY * * * * * * * * * * * * * * * * * * * * * * * * ** * ANALYSIS * FILE NAME: LINEB.DAT TIME /DATE OF STUDY: 18:53 1/31/1996 ---------------------------------------------------------------------------- USER SPECIFIED HYDROLOGY AND HYDRAULIC MODEL INFORMATION: -------------------------------------------------------------------------- 1985 SAN DIEGO MANUAL CRITERIA USER SPECIFIED STORM EVENT(YEAR) = 100.00 6 -HOUR DURATION PRECIPITATION (INCHES) = 2.600 SPECIFIED MINIMUM PIPE SIZE(INCH) = 18.00 SPECIFIED PERCENT OF GRADIENTS(DECIMAL) TO USE FOR FRICTION SLOPE _ .90 SAN DIEGO HYDROLOGY MANUAL "C "- VALUES USED NOTE: ONLY PEAK CONFLUENCE VALUES CONSIDERED ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 20.00 TO NODE 20.10 IS CODE = 21 ----------------------------------------------------------------------- >> >>> RATIONAL METHOD INITIAL SUBAREA ANALYSIS<< <<< SOIL CLASSIFICATION IS "D" SINGLE FAMILY DEVELOPMENT RUNOFF COEFFICIENT = .5500 INITIAL SUBAREA FLOW- LENGTH = 850.00 UPSTREAM ELEVATION = 215.00 DOWNSTREAM ELEVATION = 188.00 ELEVATION DIFFERENCE = 27.00 URBAN SUBAREA OVERLAND TIME OF FLOW(MINUTES) = 19.636 *CAUTION: SUBAREA SLOPE EXCEEDS COUNTY NOMOGRAPH DEFINITION. EXTRAPOLATION OF NOMOGRAPH USED. *CAUTION: SUBAREA FLOWLENGTH EXCEEDS COUNTY NOMOGRAPH DEFINITION. EXTRAPOLATION OF NOMOGRAPH USED. 100 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.835 SUBAREA RUNOFF(CFS) = 4.99 TOTAL AREA(ACRES) = 3.20 TOTAL RUNOFF(CFS) = 4.99 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 20.10 TO NODE 20.20 IS CODE = 6 ---------------------------------------------------------------------- - - - - -- >> >>>COMPUTE STREETFLOW TRAVELTIME THRU SUBAREA<< <<< --------------------------- ----------- UPSTREAM ELEVATION = 188.00 DOWNSTREAM ELEVATION = 173.00 STREET LENGTH(FEET) = 720.00 CURB HEIGHT(INCHES) = 6. STREET HALFWIDTH(FEET) = 40.00 DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK = 38.50 INTERIOR STREET CROSSFALL(DECIMAL) = .020 OUTSIDE STREET CROSSFALL(DECIMAL) = .087 SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1 * *TRAVELTIME COMPUTED USING MEAN FLOW(CFS) = 6.73 STREETFLOW MODEL RESULTS: STREET FLOWDEPTH(FEET) _ .39 HALFSTREET FLOODWIDTH(FEET) = 13.23 AVERAGE FLOW VELOCITY(FEET /SEC.) = 3.60 PRODUCT OF DEPTH &VELOCITY = 1.41 STREETFLOW TRAVELTIME(MIN) = 3.33 TC(MIN) = 22.97 100 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.562 SOIL CLASSIFICATION IS "D" COMMERCIAL DEVELOPMENT RUNOFF COEFFICIENT = .8500 SUBAREA AREA(ACRES) = 1.60 SUBAREA RUNOFF(CFS) = 3.48 SUMMED AREA(ACRES) = 4.80 TOTAL RUNOFF(CFS) = 8.47 END OF SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) = .41 HALFSTREET FLOODWIDTH(FEET) = 14.43 FLOW VELOCITY(FEET /SEC.) = 3.85 DEPTH *VELOCITY = 1.60 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 20.20 TO NODE 21.20 IS CODE = 4 >> >>>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<< <<< >> >>> USING USER - SPECIFIED PIPESIZE<< <<< DEPTH OF FLOW IN 18.0 INCH PIPE IS 11.7 INCHES PIPEFLOW VELOCITY(FEET /SEC.) = 6.9 UPSTREAM NODE ELEVATION = 168.00 DOWNSTREAM NODE ELEVATION = 167.00 FLOWLENGTH(FEET) = 80.00 MANNING'S N = .013 GIVEN PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 8.47 TRAVEL TIME(MIN.) = .19 TC(MIN.) = 23.16 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 21.20 TO NODE 21.20 IS CODE _ --------------------------------------------------------------------------- >> >>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE« <<< TOTAL NUMBER OF STREAMS = 2 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE: TIME OF CONCENTRATION(MIN.) = 23.16 RAINFALL INTENSITY(INCH /HR) = 2.55 TOTAL STREAM AREA(ACRES) = 4.80 PEAK FLOW RATE(CFS) AT CONFLUENCE = 8.47 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 21.00 TO NODE 21.10 IS CODE = 21 ---------------------------------------------------------------------------- >> >>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<< <<< ---------------------------- ------------------ SOIL CLASSIFICATION IS "D" SINGLE FAMILY DEVELOPMENT RUNOFF COEFFICIENT = .5500 INITIAL SUBAREA FLOW - LENGTH = 960.00 UPSTREAM ELEVATION = 200.00 DOWNSTREAM ELEVATION = 184.00 ELEVATION DIFFERENCE = 16.00 URBAN SUBAREA OVERLAND TIME OF FLOW(MINUTES) = 25.872 *CAUTION: SUBAREA FLOWLENGTH EXCEEDS COUNTY NOMOGRAPH DEFINITION. EXTRAPOLATION OF NOMOGRAPH USED. 100 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.373 SUBAREA RUNOFF(CFS) = 3.52 TOTAL AREA(ACRES) = 2.70 TOTAL RUNOFF(CFS) = 3.52 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 21.10 TO NODE 21.20 IS CODE = 6 ---------------------------------------------------------------------------- >> >>> COMPUTE STREETFLOW TRAVELTIME THRU SUBAREA<< <<< ------------------------ --------------------- UPSTREAM ELEVATION = 184.00 DOWNSTREAM ELEVATION = 173.00 STREET LENGTH(FEET) = 490.00 CURB HEIGHT(INCHES) = 6. STREET HALFWIDTH(FEET) = 40.00 DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK = 38.50 INTERIOR STREET CROSSFALL(DECIMAL) = .020 OUTSIDE STREET CROSSFALL(DECIMAL) = .087 SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1 * *TRAVELTIME COMPUTED USING MEAN FLOW(CFS) = 5.07 STREETFLOW MODEL RESULTS: STREET FLOWDEPTH(FEET) _ .35 HALFSTREET FLOODWIDTH(FEET) = 11.43 AVERAGE FLOW VELOCITY(FEET /SEC.) = 3.56 PRODUCT OF DEPTH &VELOCITY = 1.26 STREETFLOW TRAVELTIME(MIN) = 2.29 TC(MIN) = 28.17 100 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.246 SOIL CLASSIFICATION IS "D" SINGLE FAMILY DEVELOPMENT RUNOFF COEFFICIENT = .5500 SUBAREA AREA(ACRES) = 2.50 SUBAREA RUNOFF(CFS) = 3.09 SUMMED AREA(ACRES) = 5.20 TOTAL RUNOFF(CFS) = 6.61 END OF SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) = .38 HALFSTREET FLOODWIDTH(FEET) = 12.63 FLOW VELOCITY(FEET /SEC.) = 3.86 DEPTH *VELOCITY = 1.46 FLOW PROCESS FROM NODE 21.20 TO NODE 21.20 IS CODE = 1 --------------------------------------------------------------------------- >> >>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE« <<< >> >>>AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES<< <<< TOTAL NUMBER OF STREAMS = 2 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE: TIME OF CONCENTRATION(MIN.) = 28.17 RAINFALL INTENSITY(INCH /HR) = 2.25 TOTAL STREAM AREA(ACRES) = 5.20 PEAK FLOW RATE(CFS) AT CONFLUENCE = 6.61 ** CONFLUENCE DATA ** STREAM RUNOFF Tc INTENSITY AREA NUMBER (CFS) (MIN.) (INCH /HOUR) (ACRE) 1 8.47 23.16 2.549 4.80 2 6.61 28.17 2.246 5.20 RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO CONFLUENCE FORMULA USED FOR 2 STREAMS. ** PEAK FLOW RATE TABLE ** STREAM RUNOFF Tc NUMBER (CFS) (MIN.) 1 14.30 23.16 2 14.08 28.17 COMPUTED CONFLUENCE ESTIMATES PEAK FLOW RATE(CFS) = 14. TOTAL AREA(ACRES) = 10.00 INTENSITY (INCH /HOUR) 2.549 2.246 ARE AS FOLLOWS: 30 Tc(MIN.) = 23.16 FLOW PROCESS FROM NODE 21.20 TO NODE 22.00 IS CODE = 4 -------------------------------------------------- >> >>>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<< <<< >> >>>USING USER - SPECIFIED PIPESIZE« <<< PIPEFLOW VELOCITY(FEET /SEC.) = 8.1 UPSTREAM NODE ELEVATION = 167.00 DOWNSTREAM NODE ELEVATION = 165.80 FLOWLENGTH(FEET) = 115.00 MANNING'S N = .013 GIVEN PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 14.30 TRAVEL TIME(MIN.) _ .24 TC(MIN.) = 23.39 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 22.00 TO NODE 22.00 IS CODE = 8 ----------------------------------------------- >> >>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<< <<< 100 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.532 SOIL CLASSIFICATION IS "D" COMMERCIAL DEVELOPMENT RUNOFF COEFFICIENT = .8500 SUBAREA AREA(ACRES) = 2.00 SUBAREA RUNOFF(CFS) = 4.30 TOTAL AREA(ACRES) = 12.00 TOTAL RUNOFF(CFS) = 18.61 TC(MIN) = 23.39 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 22.00 TO NODE 23.00 IS CODE = 4 ------------------------------------------------ >> >>>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<< <<< - >> >>>USING USER - SPECIFIED PIPESIZE« <<< DEPTH OF FLOW IN 24.0 INCH PIPE IS 10.4 INCHES PIPEFLOW VELOCITY(FEET /SEC.) = 14.3 UPSTREAM NODE ELEVATION = 165.80 DOWNSTREAM NODE ELEVATION = 165.00 FLOWLENGTH(FEET) = 16.00 MANNING'S N = .013 GIVEN PIPE DIAMETER(INCH) = 24.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 18.61 TRAVEL TIME(MIN.) _ .02 TC(MIN.) = 23.41 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 23.00 TO NODE 23.00 IS CODE = 8 -------------------------------------------------- >> >>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<< <<< ------------------------------------ _______________________ 100 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.531 SOIL CLASSIFICATION IS "D" INDUSTRIAL DEVELOPMENT RUNOFF COEFFICIENT = .9500 SUBAREA AREA(ACRES) _ .60 SUBAREA RUNOFF(CFS) = 1.44 TOTAL AREA(ACRES) = 12.60 TOTAL RUNOFF(CFS) = 20.05 TC(MIN) = 23.41 END OF STUDY SUMMARY: PEAK FLOW RATE(CFS) = 20.05 Tc(MIN.) = 23.41 TOTAL AREA(ACRES) = 12.60 END OF RATIONAL METHOD ANALYSIS z 0 H o� W Z H 9z N Z LL. 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J p < U N O 0 M a U o M Z e` LL Z ~ w _� O w O U U to O U < C CL O O O W J U p LL ~ W < z F N < (J 47 a N Revised 1/85 APPENDIX XI -E iii f � N � 1 Vi � �• O � LC13 it ,- J.1 5g. Xz \ d "' \ • ' 4 �i J z v J O � < {I � JJJL��' J < c I U 7 � U • N < _ O j- u.i Z = — r Ll — o z U- J C <u < O O _ _ u r� C u1 O LA u'1 _C-_1 < y O O w O u oU i C O o O<< Z <O = C- O rn o O W J h W J C7�LL Z n U W a N Revised 1/35 APPENDIX XI -E[ Hrc ` ' .. - \ --fir -� ' • i `� - I; y°'' _. i r *yt� v WC " t i CfC CfD2 CsD lVF3 "!*s• s t CfC 'r $a.. CsC ; >. a. CfC '^ It 27 it it \ z M� \,•\\`' ;3 RuG f02 Le CsC r vF3 .l it, It •MIC f - it \ ► n s HrC2 u. LvF3 a ''f MIC z _ � is I ii. • IC a MIC GsF "� Cs uoz At 3 M aF , 5` , ` CsB: \` tD eF C38: GaF ,.Cr 1�� .i: n.• Cs8 ; _ 4 Y :Jv'Tf'!":.'�fr IL I \ •, 'OS _ l:', =` ,,q .. "Cam -- w MIC a .F p .s MIG GaP�' AtD - A tit ,,,r", a S.� �, • � � - s �. � � '"�. a `* •� EMI '.SbC b MIE •:: #4 MIE AtF `•� twoc _ j �; Cb�.r _ a cfc AAtC . - fy +� MIC Cr I 1 t J \ 5► � K+�IGi' --.= 'fir -•. `'�• �'` _ I 4,•'} .�,' ..-. .-.,.• lei � �� .__ `_ k' r-rY rL MIE `MIE CslMA J ! `tD Cb A P rrf f r b ,y CbB ak r C.E fit} *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** PIPE -FLOW HYDRAULICS COMPUTER PROGRAM PACKAGE (Reference: LACFCD,LACRD, AND OCEMA HYDRAULICS CRITERION) (c) Copyright 1982 -93 Advanced Engineering Software (aes) Ver. 4.6A Release Date: 7/18/93 License ID 1415 Analysis prepared by: NOLTE and ASSOCIATES, Inc. 5469 Kearny Villa Road, Suit 305 San Diego, CA 92123 (619) 278 -9393 FAX No. (619) 278 -4628 * * * * * * * * * * * * * * * * * * * * * * * * ** DESCRIPTION OF STUDY * * * * * * * * * * * * * * * * * * * * * * * * ** * LEUCADIA BLVD m* LINE A 10 YR STORM * * ******************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** -- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - FILE NAME: 10LINEA.DAT TIME /DATE OF STUDY: 10: 7 3/27/1996 *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** GRADUALLY VARIED FLOW ANALYSIS FOR PIPE SYSTEM NODAL POINT STATUS TABLE (Note: " *" indicates nodal point data used.) UPSTREAM RUN DOWNSTREAM RUN NODE MODEL PRESSURE PRESSURE+ FLOW PRESSURE+ NUMBER PROCESS HEAD(FT) MOMENTUM(POUNDS) DEPTH(FT) MOMENTUM(POUNDS) 2809.29- 3.00 2142.67 1.96* 2400.92 } FRICTION 2873.75- 2.70 Dc 2094.44 2.29* 2177.82 } JUNCTION 2877.75- 2.77 1986.15 2.18* 2096.44 } FRICTION 2999.77- 2.67 *Dc 1981.31 2.67 *Dc 1981.31 } JUNCTION 2999.77- 3.44* 1994.26 1.92 1933.78 } FRICTION } HYDRAULIC JUMP 3134.64- 2.58 Dc 1725.52 1.82* 2009.07 } JUNCTION 3134.64- 3.36 1739.01 1.47* 2024.35 } FRICTION 3162.15- 3.20 1667.32 1.39* 2151.78 } JUNCTION 3166.15- 2.46 Dc 1482.56 1.36* 2189.83 } FRICTION 3209.00- 2.46 Dc 1482.56 1.95* 1595.81 } FRICTION 3259.34- 2.46 *Dc 1482.56 2.46 *Dc 1482.56 } JUNCTION 3259.34- 3.07* 1482.98 1.93 1414.25 } FRICTION 3281.70- 2.49* 1338.20 2.38 Dc 1334.03 } JUNCTION 3285.70- 2.44 803.75 1.04* 1043.62 } FRICTION 3462.80- 1.85 Dc 707.81 1.05* 1030.84 } JUNCTION 3466.80- 1.49 *Dc 1011.06 1.49 *Dc 1011.06 } FRICTION } HYDRAULIC JUMP 3649.20- 1.49 *Dc 1011.06 1.49 *Dc 1011.06 } JUNCTION 3653.20- 4.74* 1009.79 1.01 832.64 } FRICTION } HYDRAULIC JUMP 3818.16- 1.48 Dc 652.05 .96* 879.05 } MANHOLE 3818.16- 1.62 666.34 .93* 900.56 } FRICTION 3929.43- 1.48 Dc 652.05 1.12* 756.81 } JUNCTION 3933.43- 2.27 632.83 .90* 765.19 } FRICTION 4113.88- 1.47 *Dc 546.99 1.47 *Dc 546.99 } JUNCTION 4117.88- 3.97* 499.80 1.29 Dc 218.86 ----------------------------------------------------------------------------- MAXIMUM NUMBER OF ENERGY BALANCES USED IN EACH PROFILE = 20 ------------------------------------------------------------------------------ NOTE: STEADY FLOW HYDRAULIC HEAD -LOSS COMPUTATIONS BASED ON THE MOST CONSERVATIVE FORMULAE FROM THE CURRENT LACRD,LACFCD, AND OCEMA DESIGN MANUALS. *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** DOWNSTREAM PIPE FLOW CONTROL DATA: NODE NUMBER = 2809.29 FLOWLINE ELEVATION = 191.16 PIPE FLOW = 73.50 CFS PIPE DIAMETER = 36.00 INCHES ASSUMED DOWNSTREAM CONTROL HGL = 194.160 ----------------------------------------------------------------------------- NODE 2809.29 : HGL = < 193.120 >;EGL = < 196.623 >;FLOWLINE = < 191.160> FLOW PROCESS FROM NODE 2809.29 TO NODE 2873.75 IS CODE = 1 UPSTREAM NODE 2873.75 ELEVATION = 193.00 (FLOW IS SUPERCRITICAL) ----------------------------------------------------------------------------- CALCULATE FRICTION LOSSES(LACFCD): PIPE FLOW = 73.50 CFS PIPE DIAMETER = 36.00 INCHES PIPE LENGTH = 64.96 FEET MANNING'S N = .01300 ----------------------------------------------------------------------------- NORMAL DEPTH(FT) = 1.77 CRITICAL DEPTH(FT) = 2.70 UPSTREAM CONTROL ASSUMED FLOWDEPTH(FT) = 2.29 GRADUALLY VARIED FLOW PROFILE COMPUTED INFORMATION: ----------------------------------------------------------------------------- DISTANCE FROM FLOW DEPTH VELOCITY SPECIFIC PRESSURE+ CONTROL(FT) (FT) (FT /SEC) ENERGY(FT) MOMENTUM(POUNDS) .000 2.295 12.665 4.787 2177.82 2.292 2.269 12.813 4.819 2189.51 4.853 2.242 12.967 4.855 2202.08 7.716 2.216 13.126 4.893 2215.56 10.918 2.190 13.291 4.935 2229.97 14.504 2.164 13.462 4.979 2245.34 18.529 2.137 13.639 5.028 2261.71 23.059 2.111 13.823 5.080 2279.11 28.177 2.085 14.013 5.136 2297.57 33.987 2.059 14.210 5.196 2317.14 40.626 2.032 14.415 5.261 2337.85 48.271 2.006 14.626 5.330 2359.75 57.163 N = .01300; FRICTION SLOPE _ 1.980 14.846 5.405 2382.88 64.960 JUNCTION LENGTH = 1.960 15.015 5.463 2400.92 ----------------------------------------------------------------------------- NODE 2873.75 : HGL = < 195.295 >;EGL = < 197.787 >;FLOWLINE = < 193.000> JUNCTION LOSSES = ( .289) +( .000) _ .289 ----------------------------------------------------------------------------- NODE 2877.75 : HGL = < 195.514 >;EGL = < 198.075 >;FLOWLINE = < 193.330> FLOW PROCESS FROM NODE 2873.75 TO NODE 2877.75 IS CODE = 5 UPSTREAM NODE 2999.77 UPSTREAM NODE 2877.75 ELEVATION = 193.33 (FLOW IS SUPERCRITICAL) ----------------------------------------------------------------------------- CALCULATE JUNCTION LOSSES: 36.00 INCHES PIPE LENGTH = 122.02 FEET MANNING'S N = PIPE FLOW DIAMETER ANGLE FLOWLINE CRITICAL VELOCITY (CFS) (INCHES) (DEGREES) ELEVATION DEPTH(FT.) (FT /SEC) UPSTREAM 70.80 36.00 .00 193.33 2.67 12.844 DOWNSTREAM 73.50 36.00 - 193.00 2.70 12.669 LATERAL #1 2.70 18.00 90.00 194.67 .62 3.140 LATERAL #2 .00 .00 .00 .00 .00 .000 Q5 .00 = = =Q5 EQUALS BASIN INPUT = == 2.502 11.237 4.464 LACFCD AND OCEMA FLOW JUNCTION FORMULAE USED: DY=( Q2* V2- Q1* Vl *COS(DELTAl)- Q3 *V3 *COS(DELTA3)- Q4 *V4 *COS(DELTA4)) /((Al +A2) *16.1) +FRICTION LOSSES UPSTREAM: MANNING'S N = .01300; FRICTION SLOPE _ .01455 DOWNSTREAM: MANNING'S N = .01300; FRICTION SLOPE _ .01396 AVERAGED FRICTION SLOPE IN JUNCTION ASSUMED AS .01426 JUNCTION LENGTH = 4.00 FEET FRICTION LOSSES = .057 FEET ENTRANCE LOSSES = .000 FEET JUNCTION LOSSES = (DY +HV1 -HV2) +(ENTRANCE LOSSES) JUNCTION LOSSES = ( .289) +( .000) _ .289 ----------------------------------------------------------------------------- NODE 2877.75 : HGL = < 195.514 >;EGL = < 198.075 >;FLOWLINE = < 193.330> *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 2877.75 TO NODE 2999.77 IS CODE = 1 UPSTREAM NODE 2999.77 ELEVATION = 195.25 (FLOW IS SUPERCRITICAL) ------------------------------------------------------------------------------ CALCULATE FRICTION LOSSES(LACFCD): PIPE FLOW = 70.80 CFS PIPE DIAMETER = 36.00 INCHES PIPE LENGTH = 122.02 FEET MANNING'S N = .01300 7----------------------------------------------------------------------------- NORMAL DEPTH(FT) = 2.12 CRITICAL DEPTH(FT) = 2.67 UPSTREAM CONTROL ASSUMED FLOWDEPTH(FT) = 2.67 GRADUALLY VARIED FLOW PROFILE COMPUTED INFORMATION: ------------------------------------------------------------------------------ DISTANCE FROM FLOW DEPTH VELOCITY SPECIFIC PRESSURE+ CONTROL(FT) (FT) (FT /SEC) ENERGY(FT) MOMENTUM(POUNDS) .000 2.667 10.660 4.432 1981.31 .159 2.639 10.745 4.433 1981.67 .624 2.612 10.835 4.436 1982.73 1.419 2.584 10.929 4.440 1984.46 2.573 2.557 11.027 4.446 1986.90 4.125 2.529 11.130 4.454 1990.04 6.121 2.502 11.237 4.464 1993.90 8.620 2.475 11.349 4.476 1998.48 11.694 2.447 11.465 4.489 2003.82 15.440 2.420 11.586 4.505 2009.91 19.979 2.392 11.712 4.523 2016.78 25.473 2.365 11.843 4.544 2024.45 32.144 = 1.95 2.337 11.979 4.567 2032.93 40.302 ASSUMED FLOWDEPTH(FT) 2.310 12.120 4.592 2042.26 50.404 COMPUTED 2.282 12.267 4.620 2052.45 63.159 VELOCITY 2.255 12.420 4.651 2063.53 79.757 (FT /SEC) 2.227 12.578 4.685 2075.53 102.428 14.320 2.200 12.742 4.722 2088.48 122.020 14.260 2.184 12.840 4.745 2096.44 ----------------------------------------------------------------------------- NODE 2999.77 : HGL = < 197.917 >;EGL = < 199.682 >;FLOWLINE = < 195.250> ********************************************** 14.142 4.950 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 2999.77 TO NODE 2999.77 IS CODE = 5 31.526 UPSTREAM NODE 2999.77 ELEVATION = 195.25 (FLOW IS AT CRITICAL DEPTH) ----------------------------------------------------------------------------- CALCULATE JUNCTION LOSSES: PIPE FLOW DIAMETER ANGLE FLOWLINE CRITICAL VELOCITY (CFS) (INCHES) (DEGREES) ELEVATION DEPTH(FT.) (FT /SEC) UPSTREAM 64.40 36.00 .00 195.25 2.58 9.111 DOWNSTREAM 70.80 36.00 - 195.25 2.67 10.660 LATERAL #1 6.40 18.00 90.00 196.00 .98 3.622 LATERAL #2 .00 .00 .00 .00 .00 .000 Q5 .00 = = =Q5 EQUALS BASIN INPUT = == LACFCD AND OCEMA FLOW JUNCTION FORMULAE USED: DY=(Q2*V2-Ql*Vl*COS(DELTAl)-Q3*V3*COS(DELTA3)- Q4 *V4 *COS(DELTA4)) /((Al +A2) *16.1) +FRICTION LOSSES UPSTREAM: MANNING'S N = .01300; FRICTION SLOPE = .00932 DOWNSTREAM: MANNING'S N = .01300; FRICTION SLOPE = .01003 AVERAGED FRICTION SLOPE IN JUNCTION ASSUMED AS .00967 JUNCTION LENGTH = 1.50 FEET FRICTION LOSSES = .015 FEET ENTRANCE LOSSES = .000 FEET JUNCTION LOSSES = (DY +HV1 -HV2) +(ENTRANCE LOSSES) JUNCTION LOSSES = ( .300) +( .000) = .300 ----------------------------------------------------------------------------- NODE 2999.77 : HGL = < 198.694 >;EGL = < 199.982 >;FLOWLINE = < 195.250> ********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 2999.77 TO NODE 3134.64 IS CODE = 1 UPSTREAM NODE 3134.64 ELEVATION = 197.44 (HYDRAULIC JUMP OCCURS) ------------------------------------------------------------------------------ CALCULATE FRICTION LOSSES(LACFCD): PIPE FLOW = 64.40 CFS PIPE DIAMETER = 36.00 INCHES PIPE LENGTH = 134.85 FEET MANNING'S N = .01300 ----------------------------------------------------------------------- - - - - -- HYDRAULIC JUMP: DOWNSTREAM RUN ANALYSIS RESULTS ------------------------------------------------------------------------------ NORMAL DEPTH(FT) ----------------------------------------------------------------------------- = 1.95 CRITICAL DEPTH(FT) = 2.58 ----------------------------------------------------------------------------- UPSTREAM CONTROL ------------------------------------------------------------------------------ ASSUMED FLOWDEPTH(FT) = 1.82 GRADUALLY VARIED FLOW PROFILE COMPUTED INFORMATION: ------------------------------------------------------------------------------ DISTANCE FROM FLOW DEPTH VELOCITY SPECIFIC PRESSURE+ CONTROL(FT) (FT) (FT /SEC) ENERGY(FT) MOMENTUM(POUNDS) .000 1.823 14.320 5.009 2009.07 5.731 1.829 14.260 4.989 2003.39 11.717 1.836 14.201 4.969 1997.79 17.988 1.842 14.142 4.950 1992.27 24.577 1.849 14.083 4.931 1986.82 31.526 1.855 14.026 4.912 1981.45 38.885 1.862 13.968 4.893 1976.16 46.715 1.868 13.911 4.875 1970.93 55.092 1.875 13.855 4.857 1965.78 64.110 1.881 13.800 4.840 1960.71 73.893 1.888 13.744 4.823 1955.70 84.603 1.894 13.690 4.806 1950.76 96.458 1.901 13.635 4.789 1945.90 109.765 1.907 13.582 4.773 1941.10 124.973 1.913 13.528 4.757 1936.37 134.850 1.917 13.499 4.748 1933.78 ----------------------------------------------------------------------------- HYDRAULIC JUMP: UPSTREAM RUN ANALYSIS RESULTS ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ DOWNSTREAM CONTROL ASSUMED PRESSURE HEAD(FT) = 3.44 ------------------------------------------------------------------------------ PRESSURE FLOW PROFILE COMPUTED INFORMATION: ----------------------------------------------------------------------------- DISTANCE FROM PRESSURE VELOCITY SPECIFIC PRESSURE+ CONTROL(FT) HEAD(FT) (FT /SEC) ENERGY(FT) MOMENTUM(POUNDS) .000 3.444 9.111 4.732 1994.26 64.114 3.000 9.111 4.289 1798.64 ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ ASSUMED DOWNSTREAM PRESSURE HEAD(FT) = 3.00 GRADUALLY VARIED FLOW PROFILE COMPUTED INFORMATION: ------------------------------------------------------------------------------ DISTANCE FROM FLOW DEPTH VELOCITY SPECIFIC PRESSURE+ CONTROL(FT) (FT) (FT /SEC) ENERGY(FT) MOMENTUM(POUNDS) 64.114 3.000 9.108 4.289 1798.64 66.676 2.979 9.117 4.270 1790.43 68.823 2.958 9.134 4.254 1783.18 70.740 2.936 9.156 4.239 1776.58 72.481 2.915 9.181 4.225 1770.50 74.075 2.894 9.211 4.212 1764.90 75.541 2.873 9.243 4.200 1759.72 76.891 2.851 9.279 4.189 1754.95 78.133 2.830 9.317 4.179 1750.56 79.273 2.809 9.358 4.170 1746.55 80.315 2.788 9.402 4.161 1742.90 81.262 2.767 9.448 4.153 1739.60 82.115 2.745 9.496 4.147 1736.66 82.874 2.724 9.547 4.140 1734.06 83.540 2.703 9.600 4.135 1731.80 84.112 2.682 9.656 4.130 1729.89 84.587 2.660 9.714 4.127 1728.32 84.963 2.639 9.774 4.124 1727.10 85.237 2.618 9.837 4.122 1726.22 85.404 2.597 9.902 4.120 1725.70 85.462 2.576 9.969 4.120 1725.52 134.850 2.576 9.969 4.120 1725.52 ---------------- - - - - -- -END OF HYDRAULIC JUMP ANALYSIS ------------------------ PRESSURE +MOMENTUM BALANCE OCCURS AT 18.13 FEET UPSTREAM OF NODE 2999.77 DOWNSTREAM DEPTH = 3.318 FEET, UPSTREAM CONJUGATE DEPTH = 1.910 FEET ----------------------------------------------------------------------------- NODE 3134.64 : HGL = < 199.263 >;EGL = < 202.449 >;FLOWLINE = < 197.440> *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 3134.64 TO NODE 3134.64 IS CODE = 5 UPSTREAM NODE ------------------------------------------------------------------------ 3134.64 ELEVATION = 197.44 (FLOW IS SUPERCRITICAL) - - - - -- CALCULATE JUNCTION LOSSES: PIPE FLOW DIAMETER ANGLE FLOWLINE CRITICAL VELOCITY (CFS) (INCHES) (DEGREES) ELEVATION DEPTH(FT.) (FT /SEC) UPSTREAM 57.90 36.00 .00 197.44 2.46 16.854 DOWNSTREAM 64.40 36.00 - 197.44 2.58 14.325 LATERAL #1 6.50 18.00 90.00 198.94 .99 5.278 LATERAL #2 .00 .00 .00 .00 .00 .000 Q5 .00 = = =Q5 EQUALS BASIN INPUT = == LACFCD AND OCEMA FLOW JUNCTION FORMULAE USED: DY=(Q2*V2-Ql*Vl*COS(DELTAI)-Q3*V3*COS(DELTA3)- Q4 *V4* COS( DELTA4 )) /((Al +A2) *16.1) +FRICTION LOSSES UPSTREAM: MANNING'S N = .01300; FRICTION SLOPE = .03252 DOWNSTREAM: MANNING'S N = .01300; FRICTION SLOPE = .01987 AVERAGED FRICTION SLOPE IN JUNCTION ASSUMED AS .02620 JUNCTION LENGTH = 1.50 FEET FRICTION LOSSES = .039 FEET ENTRANCE LOSSES = .000 FEET JUNCTION LOSSES = (DY +HV1 -HV2) +(ENTRANCE LOSSES) JUNCTION LOSSES = ( .869) +( .000) = .869 ----------------------------------------------------------------------------- NODE 3134.64 : HGL = < 198.907 >;EGL = < 203.318 >; FLOWLINE = < 197.440> *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 3134.64 TO NODE 3162.15 IS CODE = 1 UPSTREAM NODE 3162.15 ELEVATION = 197.81 (FLOW IS SUPERCRITICAL) ------------------------------------------------------------------------------ CALCULATE FRICTION LOSSES(LACFCD): PIPE FLOW = 57.90 CFS PIPE DIAMETER = 36.00 INCHES PIPE LENGTH = 27.53 FEET MANNING'S N = .01300 ----------------------------------------------------------------------------- NORMAL DEPTH(FT) = 1.94 CRITICAL DEPTH(FT) = 2.46 ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ UPSTREAM CONTROL ASSUMED FLOWDEPTH(FT) = 1.39 ----------------------------------------------------------------------------- ----------------------------------------------------------------------------- GRADUALLY VARIED FLOW PROFILE COMPUTED INFORMATION: ------------------------------------------------------------------------------ DISTANCE FROM FLOW DEPTH VELOCITY SPECIFIC PRESSURE+ CONTROL(FT) (FT) (FT /SEC) ENERGY(FT) MOMENTUM(POUNDS) .000 1.386 18.134 6.495 2151.78 9.115 1.413 17.678 6.269 2106.11 18.436 1.441 17.243 6.061 2063.05 27.530 1.467 16.849 5.878 2024.35 ------------------------------------------------------------------------------ NODE 3162.15 : HGL = < 199.196 >;EGL = < 204.305 >; FLOWLINE = < 197.810> *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 3162.15 TO NODE 3166.15 IS CODE = 5 UPSTREAM NODE 3166.15 ELEVATION = 203.33 (FLOW IS SUPERCRITICAL) ------------------------------------------------------------------------------ CALCULATE JUNCTION LOSSES: PIPE FLOW DIAMETER ANGLE FLOWLINE CRITICAL VELOCITY (CFS) (INCHES) (DEGREES) ELEVATION DEPTH(FT.) (FT /SEC) UPSTREAM 57.90 36.00 61.00 203.33 2.46 18.517 DOWNSTREAM 57.90 36.00 - 197.81 2.46 18.140 LATERAL #1 .00 .00 .00 .00 .00 .000 LATERAL #2 .00 .00 .00 .00 .00 .000 Q5 .00 = = =Q5 EQUALS BASIN INPUT = == LACFCD AND OCEMA FLOW JUNCTION FORMULAE USED: DY=( Q2* V2- Q1* V1 *COS(DELTAl)- Q3 *V3 *COS(DELTA3)- Q4 *V4 *COS(DELTA4)) /((Al +A2) *16.1) +FRICTION LOSSES UPSTREAM: MANNING'S N = .01300; FRICTION SLOPE _ .04188 DOWNSTREAM: MANNING'S N = .01300; FRICTION SLOPE _ .03962 AVERAGED FRICTION SLOPE IN JUNCTION ASSUMED,AS .04075 JUNCTION LENGTH = 4.00 FEET FRICTION LOSSES = .163 FEET ENTRANCE LOSSES = .000 FEET JUNCTION LOSSES = (DY +HV1 -HV2) +(ENTRANCE LOSSES) JUNCTION LOSSES = ( 5.713) +( .000) = 5.713 ------------------------------------------------------------------------------ NODE 3166.15 : HGL = < 204.694 >;EGL = < 210.018 >;FLOWLINE = < 203.330> *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 3166.15 TO NODE 3209.00 IS CODE = 1 UPSTREAM NODE 3209.00 ELEVATION = 207.09 (FLOW IS SUPERCRITICAL) ------------------------------------------------------------------------------ CALCULATE FRICTION LOSSES(LACFCD): PIPE FLOW = 57.90 CFS PIPE DIAMETER = 36.00 INCHES PIPE LENGTH = 42.85 FEET MANNING'S N = .01300 ------------------------------------------------------------------------------ NORMAL DEPTH(FT) = 1.11 CRITICAL DEPTH(FT) = 2.46 UPSTREAM CONTROL ASSUMED FLOWDEPTH(FT) = 1.95 GRADUALLY VARIED FLOW PROFILE COMPUTED INFORMATION: ------------------------------------------------------------------------------ DISTANCE FROM FLOW DEPTH VELOCITY SPECIFIC PRESSURE+ CONTROL(FT) (FT) (FT /SEC) ENERGY(FT) MOMENTUM(POUNDS) .000 1.947 11.924 4.156 1595.81 .968 1.905 12.227 4.228 1617.25 - 2.084 1.863 12.547 4.309 1641.06 3.369 1.822 12.887 4.402 1667.41 4.849 1.780 13.249 4.507 1696.46 6.552 1.738 13.634 4.626 1728.41 8.517 1.696 14.043 4.760 1763.48 10.788 1.655 14.479 4.912 1801.90 13.422 1.613 14.945 5.083 1843.95 16.490 1.571 15.443 5.277 1889.92 20.088 1.530 15.976 5.495 1940.15 24.337 1.488 16.548 5.742 1995.02 29.407 1.446 17.161 6.022 2054.95 35.536 1.404 17.821 6.339 2120.44 42.850 ------------------------------------------------------------------------------ 1.364 18.511 6.688 2189.83 NODE 3209.00 : HGL = < 209.037 >;EGL = < 211.246 >;FLOWLINE = < 207.090> *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 3209.00 TO NODE 3259.34 IS CODE = 1 UPSTREAM NODE 3259.34 ------------------------------------------------------------------------------ ELEVATION = 208.00 (FLOW IS SUPERCRITICAL) CALCULATE FRICTION LOSSES(LACFCD): PIPE FLOW = 57.90 CFS PIPE DIAMETER = 36.00 INCHES PIPE LENGTH = ------------------------------------------------------------------------------ 50.34 FEET MANNING'S N = .01300 NORMAL DEPTH(FT) = 1.75 CRITICAL DEPTH(FT) = 2.46 UPSTREAM CONTROL ASSUMED FLOWDEPTH(FT) = 2.46 GRADUALLY VARIED ------------------------------------------------------------------------------ FLOW PROFILE COMPUTED INFORMATION: DISTANCE FROM FLOW DEPTH VELOCITY SPECIFIC PRESSURE+ CONTROL(FT) (FT) (FT /SEC) ENERGY(FT) MOMENTUM(POUNDS) .000 2.463 9.321 3.813 1482.56 .113 2.427 9.446 3.814 1483.02 .466 2.392 9.578 3.818 1484.39 1.086 2.357 9.717 3.824 1486.71 2.004 2.321 9.863 3.833 1490.01 3.259 2.286 10.016 3.845 1494.33 4.896 2.250 10.177 3.860 1499.70 6.974 2.215 10.346 3.878 1506.17 9.564 2.179 10.523 3.900 1513.77 12.759 2.144 10.709 3.926 1522.56 16.674 2.109 10.903 3.956 1532.58 21.468 2.073 11.108 3.990 1543.89 27.351 2.038 11.322 4.030 1556.56 34.622 2.002 11.548 4.074 1570.65 43.716 1.967 11.784 4.124 1586.22 50.340 1.947 11.924 4.156 1595.81 ----------------------------------------------------------------------------- NODE 3259.34 : HGL = < 210.463 >;EGL = < 211.813 >; FLOWLINE = < 208.000> ********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 3259.34 TO NODE 3259.34 IS CODE = 5 UPSTREAM NODE 3259.34 ELEVATION = 208.00 (FLOW IS AT CRITICAL DEPTH) ----------------------------------------------------------------------------- CALCULATE JUNCTION LOSSES: PIPE FLOW DIAMETER ANGLE FLOWLINE CRITICAL VELOCITY (CFS) (INCHES) (DEGREES) ELEVATION DEPTH(FT.) (FT /SEC) UPSTREAM 53.70 36.00 .00 208.00 2.38 7.597 DOWNSTREAM 57.90 36.00 - 208.00 2.46 9.324 LATERAL #1 4.20 18.00 64.00 208.75 .79 2.377 LATERAL #2 .00 .00 .00 .00 .00 .000 Q5 .00 = = =Q5 EQUALS BASIN INPUT = == LACFCD AND OCEMA FLOW JUNCTION FORMULAE USED: DY=(Q2*V2-Ql*Vl*COS(DELTAl)-Q3*V3*COS(DELTA3)- Q4 *V4* COS( DELTA4 )) /((Al +A2) *16.1) +FRICTION LOSSES UPSTREAM: MANNING'S N = .01300; FRICTION SLOPE = .00648 DOWNSTREAM: MANNING'S N = .01300; FRICTION SLOPE = .00751 AVERAGED FRICTION SLOPE IN JUNCTION ASSUMED AS .00700 JUNCTION LENGTH = 1.50 FEET FRICTION LOSSES = .010 FEET ENTRANCE LOSSES = .000 FEET JUNCTION LOSSES = (DY +HV1 -HV2) +(ENTRANCE LOSSES) JUNCTION LOSSES = ( .153) +( .000) _ .153 ----------------------------------------------------------------------------- NODE 3259.34 : HGL = < 211.070 >;EGL = < 211.966 >; FLOWLINE = < 208.000> *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 3259.34 TO NODE 3281.70 IS CODE = 1 UPSTREAM NODE - -- 3281.70 ELEVATION = 208.47 (FLOW SEALS IN REACH) - - - - - - - - - - - - CALCULATE FRICTION - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - LOSSES(LACFCD): - - - - - - - - - - - - - - - - - - - - - PIPE FLOW = 53.70 CFS PIPE DIAMETER = 36.00 INCHES PIPE LENGTH = 22.36 FEET MANNING'S N = .01300 DOWNSTREAM CONTROL ASSUMED PRESSURE HEAD(FT) = 3.07 PRESSURE FLOW PROFILE COMPUTED INFORMATION: ----------------------------------------------------------------------------- DISTANCE FROM PRESSURE VELOCITY SPECIFIC PRESSURE+ CONTROL(FT) HEAD(FT) (FT /SEC) ENERGY(FT) MOMENTUM(POUNDS) .000 3.070 7.597 3.966 1482.98 4.801 3.000 7.597 3.896 1452.20 ----------------------------------------------------------------------------- NORMAL DEPTH(FT) = 1.60 DEPTH(FT.) CRITICAL DEPTH(FT) = 2.38 ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ ASSUMED DOWNSTREAM PRESSURE HEAD(FT) = 3.00 209.47 GRADUALLY VARIED FLOW PROFILE COMPUTED INFORMATION: 36.00 ------------------------------------------------------------------------------ DISTANCE FROM FLOW DEPTH VELOCITY SPECIFIC PRESSURE+ CONTROL(FT) (FT) (FT /SEC) ENERGY(FT) MOMENTUM(POUNDS) 4.801 3.000 7.595 3.896 1452.20 6.680 2.969 7.608 3.868 1439.95 8.339 2.938 7.633 3.843 1428.89 9.869 2.907 7.665 3.820 1418.66 11.294 2.876 7.703 3.798 1409.12 12.629 2.845 7.747 3.777 1400.21 13.882 2.814 7.795 3.758 1391.89 15.056 2.783 7.848 3.740 1384.13 16.156 2.752 7.905 3.723 1376.93 17.182 2.721 7.967 3.707 1370.27 18.134 2.690 8.033 3.693 1364.16 19.013 2.659 8.103 3.679 1358.59 19.816 2.628 8.177 3.667 1353.57 20.542 2.597 8.256 3.656 1349.10 21.187 2.566 8.338 3.646 1345.18 21.749 2.535 8.425 3.638 1341.83 22.222 2.504 8.516 3.631 1339.07 22.360 2.493 8.551 3.629 1338.20 ----------------------------------------------------------------------------- NODE 3281.70 : HGL = < 210.963 >;EGL = < 212.099 >;FLOWLINE = < 208.470> *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** - FLOW PROCESS FROM NODE 3281.70 TO NODE 3285.70 IS CODE = 5 UPSTREAM NODE 3285.70 ELEVATION = 209.47 (FLOW UNSEALS IN REACH) (NOTE: POSSIBLE JUMP IN OR UPSTREAM OF STRUCTURE) ----------------------------------------------------------------------- - - - - -- CALCULATE JUNCTION LOSSES: PIPE FLOW DIAMETER ANGLE FLOWLINE CRITICAL VELOCITY (CFS) (INCHES) (DEGREES) ELEVATION DEPTH(FT.) (FT /SEC) UPSTREAM 29.10 24.00 61.00 209.47 1.85 17.704 DOWNSTREAM 53.70 36.00 - 208.47 2.38 8.553 LATERAL #1 24.60 24.00 .00 209.47 1.75 8.435 LATERAL #2 .00 .00 .00 .00 .00 .000 Q5 .00 = = =Q5 EQUALS BASIN INPUT = == LACFCD AND OCEMA FLOW JUNCTION FORMULAE USED: DY=(Q2*V2-Ql*Vl*COS(DELTAI)-Q3*V3*COS(DELTA3)- Q4 *V4 *COS(DELTA4)) /((A1 +A2) *16.1) +FRICTION LOSSES UPSTREAM: MANNING'S N = .01300; FRICTION SLOPE _ .05867 DOWNSTREAM: MANNING'S N = .01300; FRICTION SLOPE _ .00633 AVERAGED FRICTION SLOPE IN JUNCTION ASSUMED AS .03250 JUNCTION LENGTH = 4.00 FEET FRICTION LOSSES = .130 FEET ENTRANCE LOSSES = .000 FEET JUNCTION LOSSES = (DY +HV1 -HV2) +(ENTRANCE LOSSES) JUNCTION LOSSES = ( 3.274) +( .000) = 3.274 ----------------------------------------------------------------------------- NODE 3285.70 : HGL = < 210.506 >;EGL = < 215.373 >;FLOWLINE = < 209.470> *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 3285.70 TO NODE 3462.80 IS CODE = 1 UPSTREAM NODE 3462.80 ELEVATION = 219.88 (FLOW IS SUPERCRITICAL) ------------------------------------------------------------------------------ CALCULATE FRICTION LOSSES(LACFCD): PIPE FLOW = 29.10 CFS PIPE DIAMETER = 24.00 INCHES PIPE LENGTH = 177.10 FEET MANNING'S N = .01300 ------------------------------------------------------------------------------ NORMAL DEPTH(FT) = 1.04 CRITICAL DEPTH(FT) = 1.85 ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ UPSTREAM CONTROL ASSUMED FLOWDEPTH(FT) = 1.05 ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ GRADUALLY VARIED FLOW PROFILE COMPUTED INFORMATION: ------------------------------------------------------------------------------ DISTANCE FROM FLOW DEPTH VELOCITY SPECIFIC PRESSURE+ CONTROL(FT) (FT) (FT /SEC) ENERGY(FT) MOMENTUM(POUNDS) .000 1.048 17.450 5.780 1030.84 2.879 1.048 17.463 5.786 1031.50 5.917 1.047 17.476 5.792 1032.16 9.132 1.046 17.489 5.799 1032.83 - 12.545 1.046 17.502 5.805 1033.50 16.183 1.045 17.515 5.812 1034.16 20.075 1.044 17.528 5.818 1034.83 24.261 1.044 17.541 5.825 1035.50 28.787 1.043 17.554 5.831 1036.17 33.712 1.043 17.567 5.837 1036.84 39.112 1.042 17.580 5.844 1037.52 45.088 1.041 17.593 5.851 1038.19 51.776 1.041 17.606 5.857 1038.87 59.366 1.040 17.619 5.864 1039.54 68.137 1.040 17.632 5.870 1040.22 78.522 1.039 17.646 5.877 1040.90 91.246 1.038 17.659 5.883 1041.58 107.667 1.038 17.672 5.890 1042.26 130.841 1.037 17.685 5.897 1042.94 170.566 1.036 17.698 5.903 1043.63 177.100 1.036 17.698 5.903 1043.62 ----------------------------------------------------------------------------- NODE 3462.80 : HGL = < 220.928 >;EGL = < 225.660 >;FLOWLINE = < 219.880> FLOW PROCESS FROM NODE 3462.80 TO NODE 3466.80 IS CODE = 5 UPSTREAM NODE 3466.80 ELEVATION = 220.38 (FLOW IS SUPERCRITICAL) ------------------------------------------------------------------------------ CALCULATE JUNCTION LOSSES: PIPE FLOW DIAMETER ANGLE FLOWLINE CRITICAL VELOCITY (CFS) (INCHES) (DEGREES) ELEVATION DEPTH(FT.) (FT /SEC) UPSTREAM 29.10 18.00 .00 220.38 1.49 16.478 DOWNSTREAM 29.10 24.00 - 219.88 1.85 17.456 LATERAL #1 .00 .00 .00 .00 .00 .000 LATERAL #2 .00 .00 .00 .00 .00 .000 Q5 .00 = = =Q5 EQUALS BASIN INPUT = == LACFCD AND OCEMA FLOW JUNCTION FORMULAE USED: DY=(Q2*V2-Q1*Vl*COS(DELTAl)-Q3*V3*COS(DELTA3)- Q4 *V4 *COS(DELTA4)) /((Al +A2) *16.1) +FRICTION LOSSES UPSTREAM: MANNING'S N = .01300; FRICTION SLOPE _ .07216 DOWNSTREAM: MANNING'S N = .01300; FRICTION SLOPE _ .05652 AVERAGED FRICTION SLOPE IN JUNCTION ASSUMED AS .06434 JUNCTION LENGTH = 4.00 FEET FRICTION LOSSES = .257 FEET ENTRANCE LOSSES = .000 FEET JUNCTION LOSSES = (DY +HV1 -HV2) +(ENTRANCE LOSSES) JUNCTION LOSSES = ( .429) +( .000) = .429 ----------------------------------------------------------------------------- NODE 3466.80 : HGL = < 221.872 >;EGL = < 226.088 >;FLOWLINE = < 220.380> *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 3466.80 TO NODE 3649.20 IS CODE = 1 UPSTREAM NODE 3649.20 ELEVATION = 233.54 (HYDRAULIC JUMP OCCURS) ------------------------------------------------------------------------------ CALCULATE FRICTION LOSSES(LACFCD): PIPE FLOW = 29.10 CFS PIPE DIAMETER = 18.00 INCHES PIPE LENGTH = 182.40 FEET MANNING'S N = .01300 ----------------------------------------------------------------------------- HYDRAULIC JUMP: DOWNSTREAM RUN ANALYSIS RESULTS ------------------------------------------------------------------------------ NORMAL DEPTH(FT) = 1.28 & 1.49 CRITICAL DEPTH(FT) = 1.49 NOTE: SUGGEST CONSIDERATION OF WAVE ACTION, UNCERTAINTY, ETC. ----------------------------------------------------------------------------- ----------------------------------------------------------------------------- UPSTREAM CONTROL ASSUMED FLOWDEPTH(FT) = 1.49 ----------------------------------------------------------------------------- GRADUALLY VARIED FLOW PROFILE COMPUTED INFORMATION: ------------------------------------------------------------------------------ DISTANCE FROM FLOW DEPTH VELOCITY SPECIFIC PRESSURE+ CONTROL(FT) (FT) (FT /SEC) ENERGY(FT) MOMENTUM(POUNDS) .000 1.492 16.473 5.708 1011.06 182.400 1.492 16.473 5.708 1011.06 ----------------------------------------------------------------------------- HYDRAULIC JUMP: UPSTREAM RUN ANALYSIS RESULTS ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ DOWNSTREAM CONTROL ASSUMED FLOWDEPTH(FT) = 1.49 ----------------------------------------------------------------------------- ----------------------------------------------------------------------------- GRADUALLY VARIED FLOW PROFILE COMPUTED INFORMATION: ------------------------------------------------------------------------------ DISTANCE FROM FLOW DEPTH VELOCITY SPECIFIC PRESSURE+ CONTROL(FT) (FT) (FT /SEC) ENERGY(FT) MOMENTUM(POUNDS) .000 1.493 16.471 5.708 1011.06 182.400 1.493 16.472 5.708 1011.06 ---------------- - - - - -- -END OF HYDRAULIC JUMP ANALYSIS ------------------------ PRESSURE +MOMENTUM BALANCE OCCURS AT .00 FEET UPSTREAM OF NODE 3466.80 DOWNSTREAM DEPTH = .000 FEET, UPSTREAM CONJUGATE DEPTH = 1.492 FEET ----------------------------------------------------------------------------- NODE 3649.20 : HGL = < 235.032 >;EGL = < 239.248 >;FLOWLINE = < 233.540> ********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 3649.20 TO NODE 3653.20 IS CODE = 5 UPSTREAM NODE 3653.20 ELEVATION = 233.87 (FLOW IS AT CRITICAL DEPTH) ----------------------------------------------------------------------------- CALCULATE JUNCTION LOSSES: PIPE FLOW DIAMETER ANGLE FLOWLINE CRITICAL VELOCITY (CFS) (INCHES) (DEGREES) ELEVATION DEPTH(FT.) (FT /SEC) UPSTREAM 22.80 18.00 10.00 233.87 1.48 12.902 DOWNSTREAM 29.10 18.00 - 233.54 1.49 16.477 LATERAL #1 6.30 18.00 90.00 233.87 .97 3.565 LATERAL #2 .00 .00 .00 .00 .00 .000 Q5 .00 = = =Q5 EQUALS BASIN INPUT = == LACFCD AND OCEMA FLOW JUNCTION FORMULAE USED: DY=(Q2*V2-Ql*Vl*COS(DELTAI)-Q3*V3*COS(DELTA3)- Q4 *V4 *COS(DELTA4)) /((A1 +A2) *16.1) +FRICTION LOSSES UPSTREAM: MANNING'S N = .01300; FRICTION SLOPE = .04711 DOWNSTREAM: MANNING'S N = .01300; FRICTION SLOPE _ .07236 AVERAGED FRICTION SLOPE IN JUNCTION ASSUMED AS .05974 JUNCTION LENGTH = 4.00 FEET FRICTION LOSSES = .239 FEET ENTRANCE LOSSES = .000 FEET JUNCTION LOSSES = (DY +HV1 -HV2) +(ENTRANCE LOSSES) JUNCTION LOSSES = ( 1.944) +( .000) = 1.944 ----------------------------------------------------------------------------- NODE 3653.20 : HGL = < 238.608 >;EGL = < 241.193 >;FLOWLINE = < 233.870> ********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 3653.20 TO NODE 3818.16 IS CODE = 1 UPSTREAM NODE 3818.16 ELEVATION = 246.15 (HYDRAULIC JUMP OCCURS) ----------------------------------------------------------------------------- CALCULATE FRICTION LOSSES(LACFCD): PIPE FLOW = 22.80 CFS PIPE DIAMETER = 18.00 INCHES PIPE LENGTH = 164.96 FEET MANNING'S N = .01300 ----------------------------------------------------------------------- - - - - -- HYDRAULIC JUMP: DOWNSTREAM RUN ANALYSIS RESULTS ------------------------------------------------------------------------------ NORMAL DEPTH(FT) ----------------------------------------------------------------------------- = 1.01 CRITICAL DEPTH(FT) = 1.48 ----------------------------------------------------------------------------- UPSTREAM CONTROL ------------------------------------------------------------------------------ ASSUMED FLOWDEPTH(FT) _ .96 GRADUALLY VARIED FLOW PROFILE COMPUTED INFORMATION: ------------------------------------------------------------------------------ DISTANCE FROM FLOW DEPTH VELOCITY SPECIFIC PRESSURE+ CONTROL(FT) (FT) (FT /SEC) ENERGY(FT) MOMENTUM(POUNDS) .000 .955 19.191 6.678 879.05 2.839 .958 19.127 6.642 876.41 5.817 .961 19.063 6.607 873.79 8.950 .964 19.000 6.573 871.20 12.257 .966 18.937 6.538 868.63 15.761 .969 18.875 6.505 866.09 19.488 .972 18.813 6.471 863.56 23.472 .975 18.752 6.438 861.06 27.754 .977 18.691 6.405 858.57 32.387 .980 18.630 6.373 856.11 37.436 .983 18.570 6.341 853.67 42.991 .986 18.511 6.310 851.25 49.170 .989 18.452 6.278 848.86 56.141 .991 18.393 6.248 846.48 64.149 .994 18.335 6.217 844.12 73.574 .997 18.277 6.187 841.79 85.052 1.000 18.220 6.157 839.47 99.777 1.002 18.163 6.128 837.17 120.430 1.005 18.106 6.099 834.90 155.616 1.008 18.050 6.070 832.64 164.960 ------------------------------------------------------------------------------ 1.008 18.050 6.070 832.64 HYDRAULIC JUMP: UPSTREAM RUN ANALYSIS RESULTS DOWNSTREAM CONTROL ASSUMED PRESSURE HEAD(FT) = 4.74 PRESSURE FLOW PROFILE COMPUTED INFORMATION: ----------------------------------------------------------------------------- DISTANCE FROM PRESSURE VELOCITY SPECIFIC PRESSURE+ CONTROL(FT) HEAD(FT) (FT /SEC) ENERGY(FT) MOMENTUM(POUNDS) .000 4.738 12.902 7.323 1009.79 118.465 1.500 12.902 4.085 652.77 ASSUMED DOWNSTREAM PRESSURE HEAD(FT) = 1.50 GRADUALLY VARIED FLOW PROFILE COMPUTED INFORMATION: ----------------------------------------------------------------------------- DISTANCE FROM FLOW DEPTH VELOCITY SPECIFIC PRESSURE+ CONTROL(FT) (FT) (FT /SEC) ENERGY(FT) MOMENTUM(POUNDS) 118.465 1.500 12.898 4.085 652.77 118.495 1.499 12.899 4.084 652.68 118.519 1.498 12.899 4.083 652.60 118.541 1.497 12.900 4.083 652.53 118.561 1.496 12.901 4.082 652.47 118.578 1.495 12.902 4.082 652.41 118.594 1.494 12.903 4.081 652.36 118.608 1.493 12.905 4.081 652.31 118.620 1.492 12.906 4.080 652.27 118.632 1.491 12.908 4.080 652.24 118.642 1.490 12.910 4.080 652.20 118.650 1.489 12.911 4.079 652.17 118.658 1.488 12.913 4.079 652.15 118.665 1.487 12.915 4.079 652.12 118.670 1.486 12.917 4.079 652.11 118.675 1.485 12.919 4.079 652.09 118.679 1.484 12.921 4.079 652.08 118.682 1.483 12.923 4.078 652.07 118.684 1.483 12.926 4.078 652.06 118.685 1.482 12.928 4.078 652.06 118.685 1.481 12.930 4.078 652.05 164.960 1.481 12.930 4.078 652.05 ----------------- - - - - -- -END OF HYDRAULIC JUMP ANALYSIS ------------------------ PRESSURE +MOMENTUM BALANCE OCCURS AT 57.56 FEET UPSTREAM OF NODE 3653.20 DOWNSTREAM DEPTH = 3.165 FEET, UPSTREAM CONJUGATE DEPTH = 1.003 FEET ------------------------------------------------------------------------------ NODE 3818.16 : HGL = < 247.105 >;EGL = < 252.828 >;FLOWLINE = < 246.150> ********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 3818.16 TO NODE 3818.16 IS CODE = 2 UPSTREAM NODE 3818.16 ELEVATION = 246.15 (FLOW IS SUPERCRITICAL) ----------------------------------------------------------------------------- CALCULATE MANHOLE LOSSES(LACFCD): PIPE FLOW = 22.80 CFS PIPE DIAMETER = 18.00 INCHES AVERAGED VELOCITY HEAD = 5.881 FEET HMN = .05 *(AVERAGED VELOCITY HEAD) = .05 *( 5.881) _ .294 -_----------------------------------------------------------------------------- NODE 3818.16 : HGL = < 247.084 >;EGL = < 253.122 >;FLOWLINE = < 246.150> *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 3818.16 TO NODE 3929.43 IS CODE = 1 UPSTREAM NODE 3929.43 ELEVATION = 257.05 (FLOW IS SUPERCRITICAL) ------------------------------------------------------------------------------ CALCULATE FRICTION LOSSES(LACFCD): PIPE FLOW = 22.80 CFS PIPE DIAMETER = 18.00 INCHES PIPE LENGTH = 111.27 FEET MANNING'S N = .01300 ------------------------------------------------------------------------------ NORMAL DEPTH(FT) _ .92 CRITICAL DEPTH(FT) = 1.48 ----------------------------------------------------------------------------- ----------------------------------------------------------------------------- UPSTREAM CONTROL ASSUMED FLOWDEPTH(FT) = ----------------------------------------------------------------------------- 1.12 ----------------------------------------------------------------------------- GRADUALLY VARIED FLOW PROFILE COMPUTED INFORMATION: ------------------------------------------------------------------------------ DISTANCE FROM FLOW DEPTH VELOCITY SPECIFIC PRESSURE+ CONTROL(FT) (FT) (FT /SEC) ENERGY(FT) MOMENTUM(POUNDS) .000 1.119 16.125 5.159 756.81 1.651 1.109 16.276 5.225 762.60 3.430 1.099 16.431 5.294 768.58 5.350 1.089 16.590 5.365 774.76 7.429 1.079 16.754 5.440 781.14 9.689 1.069 16.922 5.518 787.72 12.154 1.059 17.095 5.599 794.52 14.855 1.049 17.272 5.684 801.53 17.833 1.039 17.454 5.772 808.77 21.133 1.029 17.642 5.865 816.24 24.821 1.019 17.834 5.961 823.95 28.977 1.009 18.032 6.061 831.90 33.714 .999 18.235 6.166 840.10 39.189 .989 18.444 6.275 848.57 45.631 .979 18.659 6.389 857.30 53.395 .969 18.880 6.508 866.31 63.080 .959 19.108 6.632 875.61 75.803 .949 19.341 6.761 885.20 94.078 .939 19.582 6.897 895.09 111.270 .934 19.714 6.972 900.56 ------------------------------------------------------------------------------ _. NODE 3929.43 : HGL = < 258.169 >;EGL = < 262.209 >;FLOWLINE = < 257.050> ********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 3929.43 TO NODE 3933.43 IS CODE = 5 UPSTREAM NODE 3933.43 ELEVATION = 257.38 (FLOW IS SUPERCRITICAL) ----------------------------------------------------------------------------- CALCULATE JUNCTION LOSSES: PIPE FLOW DIAMETER ANGLE FLOWLINE CRITICAL VELOCITY (CFS) (INCHES) (DEGREES) ELEVATION DEPTH(FT.) (FT /SEC) UPSTREAM 20.60 18.00 .00 257.38 1.47 18.486 DOWNSTREAM 22.80 18.00 - 257.05 1.48 16.130 LATERAL #1 2.20 18.00 80.00 257.38 .56 2.139 LATERAL #2 .00 .00 .00 .00 .00 .000 Q5 .00 = = =Q5 EQUALS BASIN INPUT = == LACFCD AND OCEMA FLOW JUNCTION FORMULAE USED: DY=(Q2*V2-Ql*Vl*COS(DELTAI)-Q3*V3*COS(DELTA3)- Q4 *V4 *COS(DELTA4)) /((Al +A2) *16.1) +FRICTION LOSSES UPSTREAM: MANNING'S N = .01300; FRICTION SLOPE _ .08379 DOWNSTREAM: MANNING'S N = .01300; FRICTION SLOPE _ .05741 AVERAGED FRICTION SLOPE IN JUNCTION ASSUMED AS .07060 JUNCTION LENGTH = 4.00 FEET FRICTION LOSSES = .282 FEET ENTRANCE LOSSES = .000 FEET JUNCTION LOSSES = (DY +HV1 -HV2) +(ENTRANCE LOSSES) JUNCTION LOSSES = ( 1.383) +( .000) = 1.383 NODE 3933.43 : HGL = < 258.285 >;EGL = < 263.592 >;FLOWLINE = < 257.380> ********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 3933.43 TO NODE 4113.88 IS CODE = 1 UPSTREAM NODE 4113.88 ELEVATION = 274.05 (FLOW IS SUPERCRITICAL) ----------------------------------------------------------------------------- CALCULATE FRICTION LOSSES(LACFCD): PIPE FLOW = 20.60 CFS PIPE DIAMETER = 18.00 INCHES PIPE LENGTH = 180.45 FEET MANNING'S N = .01300 ----------------------------------------------------------------------------- NORMAL DEPTH(FT) _ .88 CRITICAL DEPTH(FT) = 1.47 UPSTREAM CONTROL ASSUMED FLOWDEPTH(FT) = 1.47 ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ GRADUALLY VARIED FLOW PROFILE COMPUTED INFORMATION: ----------------------------------------------------------------------------- DISTANCE FROM FLOW DEPTH VELOCITY SPECIFIC PRESSURE+ CONTROL(FT) (FT) (FT /SEC) ENERGY(FT) MOMENTUM(POUNDS) .000 1.471 11.707 3.600 546.99 .118 1.441 11.807 3.607 547.75 .437 1.412 11.938 3.626 549.78 .933 1.382 12.097 3.655 552.92 1.604 1.352 12.279 3.695 557.08 2.457 1.322 12.486 3.745 562.23 3.507 1.293 12.715 3.805 568.38 4.777 1.263 12.969 3.876 575.52 6.298 1.233 13.247 3.960 583.71 8.111 1.204 13.550 4.056 592.97 10.273 1.174 13.880 4.167 603.36 12.859 1.144 14.238 4.294 614.96 15.972 1.114 14.627 4.439 627.84 19.758 1.085 15.049 4.603 642.09 24.433 1.055 15.505 4.790 657.83 30.335 1.025 16.000 5.003 675.18 38.029 .996 16.537 5.245 694.27 48.581 .966 17.120 5.520 715.28 64.385 .936 17.754 5.834 738.40 93.130 .906 18.444 6.192 763.84 180.450 .905 18.481 6.212 765.19 ----------------------------------------------------------------------------- NODE 4113.88 : HGL = < 275.521 >;EGL = < 277.650 >; FLOWLINE = < 274.050> ********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 4113.88 TO NODE 4117.88 IS CODE = 5 UPSTREAM NODE 4117.88 ELEVATION = 274.38 (FLOW IS AT CRITICAL DEPTH) ----------------------------------------------------------------------------- CALCULATE JUNCTION LOSSES: PIPE FLOW DIAMETER ANGLE FLOWLINE CRITICAL VELOCITY (CFS) (INCHES) (DEGREES) ELEVATION DEPTH(FT.) (FT /SEC) UPSTREAM 11.50 18.00 45.00 274.38 1.29 6.508 DOWNSTREAM 20.60 18.00 - 274.05 1.47 11.710 LATERAL #1 9.10 18.00 45.00 274.38 1.17 5.150 LATERAL #2 .00 .00 .00 .00 .00 .000 Q5 .00 = = =Q5 EQUALS BASIN INPUT = == LACFCD AND OCEMA FLOW JUNCTION FORMULAE USED: DY=(Q2*V2-Ql*Vl*COS(DELTAl)-Q3*V3*COS(DELTA3)- Q4 *V4 *COS(DELTA4)) /((Al +A2) *16.1) +FRICTION LOSSES UPSTREAM: MANNING'S N = .01300; FRICTION SLOPE = .01199 DOWNSTREAM: MANNING'S N = .01300; FRICTION SLOPE = .03449 AVERAGED FRICTION SLOPE IN JUNCTION ASSUMED AS .02324 JUNCTION LENGTH = 4.00 FEET FRICTION LOSSES = .093 FEET ENTRANCE LOSSES = .000 FEET JUNCTION LOSSES = (DY +HV1 -HV2) +(ENTRANCE LOSSES) JUNCTION LOSSES = ( 1.355) +( .000) = 1.355 NODE 4117.88 : HGL = < 278.347 >;EGL = < 279.005 >; FLOWLINE = < 274.380> *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** UPSTREAM PIPE FLOW CONTROL DATA: NODE NUMBER = 4117.88 FLOWLINE ELEVATION = 274.38 ASSUMED UPSTREAM CONTROL HGL = 275.67 FOR DOWNSTREAM RUN ANALYSIS PIPE -FLOW HYDRAULICS COMPUTER PROGRAM PACKAGE (Reference: LACFCD,LACRD, AND OCEMA HYDRAULICS CRITERION) (c) Copyright 1982 -93 Advanced Engineering Software (aes) Ver. 4.6A Release Date: 7/18/93 License ID 1415 Analysis prepared by: NOLTE and ASSOCIATES, Inc. 5469 Kearny Villa Road, Suit 305 San Diego, CA 92123 (619) 278 -9393 FAX No. (619) 278 -4628 * * * * * * * * * * * * * * * * * * * * * * * * ** DESCRIPTION OF STUDY * * * * * * * * * * * * * * * * * * * * * * * * ** • LEUCADIA BLVD • LINE A 50 YR STORM * * ******************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** -- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - FILE NAME: 50LINEA.DAT TIME /DATE OF STUDY: 9:42 3/27/1996 *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** GRADUALLY VARIED FLOW ANALYSIS FOR PIPE SYSTEM NODAL POINT STATUS TABLE (Note: " *" indicates nodal point data used.) UPSTREAM RUN DOWNSTREAM RUN NODE MODEL PRESSURE PRESSURE+ FLOW PRESSURE+ NUMBER PROCESS HEAD(FT) MOMENTUM(POUNDS) DEPTH(FT) MOMENTUM(POUNDS) 2809.29- 3.00 3120.27 2.35* 3320.51 } FRICTION 2873.75- 2.87 *Dc 3101.00 2.87 *Dc 3101.00 } JUNCTION 2877.75- 3.12* 2988.66 2.85 Dc 2914.56 } FRICTION 2999.77- 3.47* 3145.83 2.85 Dc 2914.56 } JUNCTION 2999.77- 4.38* 3157.13 2.36 2633.25 } FRICTION 3134.62- 4.27* 3112.23 2.28 2681.54 } JUNCTION 3134.62- 5.11* 3121.50 1.77 2698.66 } FRICTION - 3162.15- 5.08* 3110.61 1.68 2829.90 } JUNCTION 3166.15- 2.72 Dc 2145.75 1.61* 2966.37 } FRICTION 3209.00- 2.72 Dc 2145.75 2.29* 2239.57 } FRICTION 3259.34- 2.72 *Dc 2145.75 2.72 *Dc 2145.75 } JUNCTION 3259.34- 3.37* 2143.32 2.24 1996.65 } FRICTION _3281.70- 3.15* 2042.48 2.65 Dc 1919.82 } JUNCTION 3285.70- 3.08 1274.60 1.20* 1445.19 } FRICTION 3462.80- 1.94 Dc 1059.41 1.08* 1619.15 } JUNCTION 3466.80- 1.50 *Dc 1624.73 1.50 *Dc 1624.73 } FRICTION 3649.20- 11.59* 2736.92 1.50 Dc 1624.73 } JUNCTION 3653.20- 17.19* 2760.31 1.26 1115.99 } FRICTION 3818.16- 17.83* 2831.12 1.17 1183.45 } MANHOLE 3818.16- 18.04* 2854.82 1.14 1212.25 } FRICTION -- 3929.43- 15.86* 2614.03 1.43 1038.41 } JUNCTION 3933.43- 17.41* 2607.35 1.06 1053.92 } FRICTION 4113.88- 12.23* 2035.55 1.49 Dc 852.41 } JUNCTION 4117.88- 16.54* 1984.60 1.40 Dc 322.44 ------------------------------------------------------------------------------ MAXIMUM NUMBER OF ENERGY BALANCES USED IN EACH PROFILE = 20 ------------------------------------------------------------------------------ NOTE: STEADY FLOW HYDRAULIC HEAD -LOSS COMPUTATIONS BASED ON THE MOST CONSERVATIVE FORMULAE FROM THE CURRENT LACRD,LACFCD, AND OCEMA DESIGN MANUALS. *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** DOWNSTREAM PIPE FLOW CONTROL DATA: NODE NUMBER = 2809.29 FLOWLINE ELEVATION = 191.16 PIPE FLOW = 94.70 CFS PIPE DIAMETER = 36.00 INCHES ASSUMED DOWNSTREAM CONTROL HGL = 194.160 ------------------------------------------------------------------------------ NODE 2809.29 : HGL = < 193.508 >;EGL = < 197.460 >; FLOWLINE = < 191.160> ********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 2809.29 TO NODE 2873.75 IS CODE = 1 UPSTREAM NODE 2873.75 ELEVATION = 193.00 (FLOW IS SUPERCRITICAL) ----------------------------------------------------------------------------- CALCULATE FRICTION LOSSES(LACFCD): PIPE FLOW = 94.70 CFS PIPE DIAMETER = 36.00 INCHES PIPE LENGTH = 64.46 FEET MANNING'S N = .01300 ----------------------------------------------------------------------------- NORMAL DEPTH(FT) = 2.11 CRITICAL DEPTH(FT) = 2.87 UPSTREAM CONTROL ASSUMED FLOWDEPTH(FT) = 2.87 GRADUALLY VARIED FLOW PROFILE COMPUTED INFORMATION: ------------------------------------------------------------------------------ DISTANCE FROM FLOW DEPTH VELOCITY SPECIFIC PRESSURE+ CONTROL(FT) (FT) (FT /SEC) ENERGY(FT) MOMENTUM(POUNDS) .000 2.872 13.594 5.743 3101.00 .274 2.834 13.691 5.746 3102.31 1.071 2.795 13.802 5.755 3106.12 2.378 2.757 13.924 5.770 3112.29 4.204 2.719 14.059 5.790 3120.74 6.574 2.680 14.204 5.815 3131.43 9.533 2.642 14.361 5.846 3144.35 13.142 2.604 14.528 5.883 3159.49 17.484 2.566 14.708 5.927 3176.89 22.671 2.527 14.898 5.976 3196.57 28.849 2.489 15.100 6.032 3218.60 36.216 FROM NODE 2877.75 TO NODE 2999.77 IS CODE = 1 2.451 15.314 6.095 3243.02 45.042 ----------------------------------------------------------------------------- CALCULATE FRICTION 2.412 15.541 6.165 3269.91 55.712 PIPE LENGTH = 2.374 15.780 6.243 3299.35 64.460 2.348 15.947 6.300 3320.51 ------------------------------------------------------------------------------ NODE 2873.75 : HGL = < 195.872 >;EGL = < 198.743 >; FLOWLINE = < 193.000> ********************************************** FLOW PROCESS FROM NODE 2999.77 TO NODE 2999.77 IS CODE = 5 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 2873.75 TO NODE 2877.75 IS CODE = 5 UPSTREAM NODE 2877.75 ELEVATION = 193.33 (FLOW IS AT CRITICAL DEPTH) ----------------------------------------------------------------------------- CALCULATE JUNCTION LOSSES: (FT /SEC) UPSTREAM PIPE FLOW DIAMETER ANGLE FLOWLINE CRITICAL VELOCITY LATERAL #1 (CFS) (INCHES) (DEGREES) ELEVATION DEPTH(FT.) (FT /SEC) UPSTREAM 91.10 36.00 .00 193.33 2.85 12.888 DOWNSTREAM 94.70 36.00 - 193.00 2.87 13.598 LATERAL #1 3.60 18.00 90.00 194.67 .72 2.039 LATERAL #2 .00 .00 .00 .00 .00 .000 Q5 .00 = = =Q5 EQUALS BASIN INPUT = == LACFCD AND OCEMA FLOW JUNCTION FORMULAE USED: DY=(Q2*V2-Ql*V1*COS(DELTAl)-Q3*V3*COS(DELTA3)- Q4 *V4 *COS(DELTA4)) /((Al +A2) *16.1) +FRICTION LOSSES UPSTREAM: MANNING'S N = .01300; FRICTION SLOPE = .01865 DOWNSTREAM: MANNING'S N = .01300; FRICTION SLOPE = .01753 AVERAGED FRICTION SLOPE IN JUNCTION ASSUMED AS .01809 JUNCTION LENGTH = 4.00 FEET FRICTION LOSSES = .072 FEET ENTRANCE LOSSES = .000 FEET JUNCTION LOSSES = (DY +HV1 -HV2) +(ENTRANCE LOSSES) JUNCTION LOSSES = ( .283) +( .000) = .283 NODE 2877.75 : HGL = < 196.447 >;EGL = < 199.027 >; FLOWLINE = < 193.330> ********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 2877.75 TO NODE 2999.77 IS CODE = 1 UPSTREAM NODE 2999.77 ELEVATION = 195.25 (FLOW IS UNDER PRESSURE) ----------------------------------------------------------------------------- CALCULATE FRICTION LOSSES(LACFCD): PIPE FLOW = 91.10 CFS PIPE DIAMETER = 36.00 INCHES PIPE LENGTH = 122.02 FEET MANNING'S N = .01300 SF= (Q /K) * *2 = (( 91.10)/( 666.987)) * *2 = .01866 HF =L *SF = ( 122.02) *( .01866) = 2.276 ------------------------------------------------------------------------------ NODE 2999.77 : HGL = < 198.724 >;EGL = < 201.303 >; FLOWLINE = < 195.250> *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 2999.77 TO NODE 2999.77 IS CODE = 5 UPSTREAM NODE 2999.77 ELEVATION = 195.25 (FLOW IS UNDER PRESSURE) ------------------------------------------------------------------------------ CALCULATE JUNCTION LOSSES: PIPE FLOW DIAMETER ANGLE FLOWLINE CRITICAL VELOCITY (CFS) (INCHES) (DEGREES) ELEVATION DEPTH(FT.) (FT /SEC) UPSTREAM 83.00 36.00 .00 195.25 2.80 11.742 DOWNSTREAM 91.10 36.00 - 195.25 2.85 12.888 LATERAL #1 8.10 18.00 90.00 196.00 1.10 4.584 LATERAL #2 .00 .00 .00 .00 .00 .000 Q5 .00 = = =Q5 EQUALS BASIN INPUT = == LACFCD AND OCEMA FLOW JUNCTION FORMULAE USED: DY=( Q2* V2- Ql* V1 *COS(DELTAI)- Q3 *V3 *COS(DELTA3)- Q4 *V4 *COS(DELTA4)) /((Al +A2) *16.1) +FRICTION LOSSES UPSTREAM: MANNING'S N = .01300; FRICTION SLOPE _ .01548 DOWNSTREAM: MANNING'S N = .01300; FRICTION SLOPE _ .01865 AVERAGED FRICTION SLOPE IN JUNCTION ASSUMED AS .01707 JUNCTION LENGTH = 1.50 FEET FRICTION LOSSES = .026 FEET ENTRANCE LOSSES = .000 FEET JUNCTION LOSSES = (DY +HV1 -HV2) +(ENTRANCE LOSSES) JUNCTION LOSSES = ( .464) +( .000) _ .464 ------------------------------------------------------------------------------ NODE 2999.77 : HGL = < 199.626 >;EGL = < 201.767 >; FLOWLINE = < 195.250> *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 2999.77 TO NODE 3134.62 IS CODE = 1 UPSTREAM NODE 3134.62 ELEVATION = 197.44 (FLOW IS UNDER PRESSURE) ------------------------------------------------------------------------------ CALCULATE FRICTION LOSSES(LACFCD): PIPE FLOW = 83.00 CFS PIPE DIAMETER = 36.00 INCHES PIPE LENGTH = 134.85 FEET MANNING'S N = .01300 SF= (Q /K) * *2 = (( 83.00)/( 666.985)) * *2 = .01549 HF =L *SF = ( 134.85) *( .01549) = 2.088 ----------------------------------------------------------------------------- NODE 3134.62 : HGL = < 201.714 >;EGL = < 203.855 >; FLOWLINE = < 197.440> ********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 3134.62 TO NODE 3134.62 IS CODE = 5 UPSTREAM NODE 3134.62 ELEVATION = 197.44 (FLOW IS UNDER PRESSURE) ----------------------------------------------------------------------------- CALCULATE JUNCTION LOSSES: PIPE FLOW DIAMETER ANGLE FLOWLINE CRITICAL VELOCITY (CFS) (INCHES) (DEGREES) ELEVATION DEPTH(FT.) (FT /SEC) UPSTREAM 74.70 36.00 .00 197.44 2.72 10.568 DOWNSTREAM 83.00 36.00 - 197.44 2.80 11.742 LATERAL #1 8.30 18.00 90.00 198.94 1.12 4.697 LATERAL #2 .00 .00 .00 .00 .00 .000 Q5 .00 = = =Q5 EQUALS BASIN INPUT = == LACFCD AND OCEMA FLOW JUNCTION FORMULAE USED: DY=(Q2*V2-Ql*Vl*COS(DELTAl)-Q3*V3*COS(DELTA3)- Q4 *V4 *COS(DELTA4)) /((Al +A2) *16.1) +FRICTION LOSSES - UPSTREAM: MANNING'S N = .01300; FRICTION SLOPE _ .01254 DOWNSTREAM: MANNING'S N = .01300; FRICTION SLOPE _ .01548 AVERAGED FRICTION SLOPE IN JUNCTION ASSUMED AS .01401 JUNCTION LENGTH = 1.50 FEET FRICTION LOSSES = .021 FEET ENTRANCE LOSSES = .000 FEET JUNCTION LOSSES = (DY +HV1- HV2) +(ENTRANCE LOSSES) JUNCTION LOSSES = ( .428) +( .000) _ .428 ----------------------------------------------------------------------------- NODE 3134.62 : HGL = < 202.549 >;EGL = < 204.283 >; FLOWLINE = < 197.440> *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 3134.62 TO NODE 3162.15 IS CODE = 1 UPSTREAM NODE 3162.15 ELEVATION = 197.81 (FLOW IS UNDER PRESSURE) ------------------------------------------------------------------------------ CALCULATE FRICTION LOSSES(LACFCD): PIPE FLOW = 74.70 CFS PIPE DIAMETER = 36.00 INCHES PIPE LENGTH = 27.53 FEET MANNING'S N = .01300 SF= (Q /K) * *2 = (( 74.70)/( 666.978)) * *2 = .01254 HF =L *SF = ( 27.53) *( .01254) _ .345 ------------------------------------------------------------------------------ NODE 3162.15 : HGL = < 202.894 >;EGL = < 204.628 >; FLOWLINE = < 197.810> *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 3162.15 TO NODE 3166.15 IS CODE = 5 UPSTREAM NODE 3166.15 ELEVATION = 203.33 (FLOW SEALS IN REACH) (NOTE: POSSIBLE JUMP IN OR UPSTREAM OF STRUCTURE) ------------------------------------------------------------------------ - - - - -- CALCULATE JUNCTION LOSSES: PIPE FLOW DIAMETER ANGLE FLOWLINE CRITICAL VELOCITY .01254 (CFS) (INCHES) (DEGREES) ELEVATION DEPTH(FT.) (FT /SEC) UPSTREAM 74.70 36.00 61.00 203.33 2.72 19.348 DOWNSTREAM 74.70 36.00 - 197.81 2.72 10.568 LATERAL #1 .00 .00 .00 .00 .00 .000 LATERAL #2 .00 .00 .00 .00 .00 .000 Q5 .00 = = =Q5 EQUALS BASIN INPUT = == ------------------------------------------------------------------------------ GRADUALLY VARIED LACFCD AND OCEMA FLOW JUNCTION FORMULAE USED: DY=( Q2* V2- Ql* V1 *COS(DELTAl)- Q3 *V3 *COS(DELTA3)- Q4 *V4 *COS(DELTA4)) /((Al +A2) *16.1) +FRICTION LOSSES UPSTREAM: MANNING'S N = .01300; FRICTION SLOPE = .03970 DOWNSTREAM: MANNING'S N = .01300; FRICTION SLOPE = .01254 AVERAGED FRICTION SLOPE IN JUNCTION ASSUMED AS .02612 JUNCTION LENGTH = 4.00 FEET FRICTION LOSSES = .104 FEET ENTRANCE LOSSES = .000 FEET JUNCTION LOSSES = (DY +HV1 -HV2) +(ENTRANCE LOSSES) JUNCTION LOSSES = ( 6.124) +( .000) = 6.124 ------------------------------------------------------------------------------ NODE 3166.15 : HGL = < 204.939 >;EGL = < 210.752 >;FLOWLINE = < 203.330> *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 3166.15 TO NODE 3209.00 IS CODE = 1 UPSTREAM NODE 3209.00 ELEVATION = 207.09 (FLOW IS SUPERCRITICAL) ------------------------------------------------------------------------------ CALCULATE FRICTION LOSSES(LACFCD): PIPE FLOW = 74.70 CFS PIPE DIAMETER = 36.00 INCHES PIPE LENGTH = 42.85 FEET MANNING'S N = .01300 ------------------------------------------------------------------------------ NORMAL DEPTH(FT) = 1.28 CRITICAL DEPTH(FT) = 2.72 ----------------------------------------------------------------------------- ----------------------------------------------------------------------------- UPSTREAM CONTROL ASSUMED FLOWDEPTH(FT) = 2.29 ------------------------------------------------------------------------------ GRADUALLY VARIED FLOW PROFILE COMPUTED INFORMATION: ------------------------------------------------------------------------------ DISTANCE FROM FLOW DEPTH VELOCITY SPECIFIC PRESSURE+ CONTROL(FT) (FT) (FT /SEC) ENERGY(FT) MOMENTUM(POUNDS) .000 2.290 12.900 4.875 2239.57 .962 2.239 13.198 4.945 2264.59 2.095 2.189 13.517 5.027 2293.09 3.424 2.138 13.858 5.122 2325.27 4.977 2.087 14.223 5.231 2361.39 6.787 2.037 14.614 5.355 2401.72 8.896 1.986 15.034 5.498 2446.56 11.356 1.936 15.484 5.661 2496.25 14.232 1.885 15.966 5.846 2551.19 17.608 1.835 16.485 6.057 2611.80 21.589 1.784 17.044 6.298 2678.59 26.320 1.734 17.645 6.571 2752.11 31.995 1.683 18.294 6.883 2833.00 38.889 1.632 18.996 7.239 2921.99 42.850 ------------------------------------------------------------------------ 1.609 19.342 7.422 2966.37 - - - - -- NODE 3209.00 : HGL = < 209.380 >;EGL = < 211.965 >;FLOWLINE = < 207.090> FLOW PROCESS FROM NODE 3209.00 TO NODE 3259.34 IS CODE = 1 UPSTREAM NODE 3259.34 ELEVATION = 208.00 (FLOW IS SUPERCRITICAL) ------------------------------------------------------------------------------ CALCULATE FRICTION LOSSES(LACFCD): PIPE FLOW = 74.70 CFS PIPE DIAMETER = 36.00 INCHES PIPE LENGTH = 50.34 FEET MANNING'S N = .01300 ------------------------------------------------------------------------------ NORMAL DEPTH(FT) = 2.09 CRITICAL DEPTH(FT) = 2.72 ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ UPSTREAM CONTROL ASSUMED FLOWDEPTH(FT) = 2.72 ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ GRADUALLY VARIED FLOW PROFILE COMPUTED INFORMATION: ------------------------------------------------------------------------------ DISTANCE FROM FLOW DEPTH VELOCITY SPECIFIC PRESSURE+ CONTROL(FT) (FT) (FT /SEC) ENERGY(FT) MOMENTUM(POUNDS) .000 2.716 11.099 4.630 2145.75 .164 2.684 11.192 4.631 2146.23 .667 2.653 11.291 4.634 2147.68 1.531 2.622 11.396 4.640 2150.08 2.785 2.591 11.507 4.648 2153.45 4.467 2.560 11.624 4.659 2157.80 6.625 2.528 11.747 4.673 2163.15 9.319 2.497 11.876 4.689 2169.52 12.628 2.466 12.011 4.708 2176.91 16.650 2.435 12.152 4.730 2185.37 21.516 2.404 12.300 4.755 2194.91 27.398 2.373 12.455 4.783 2205.56 34.530 2.341 12.617 4.815 2217.37 43.243 2.310 12.785 4.850 2230.35 50.340 2.290 12.900 4.875 2239.57 ----------------------------------------------------------------------------- NODE 3259.34 : HGL = < 210.716 >;EGL = < 212.630 >;FLOWLINE = < 208.000> ********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 3259.34 TO NODE 3259.34 IS CODE = 5 UPSTREAM NODE 3259.34 ELEVATION = 208.00 (FLOW IS AT CRITICAL DEPTH) ------------------------------------------------------------------------------ CALCULATE JUNCTION LOSSES: PIPE FLOW DIAMETER ANGLE FLOWLINE CRITICAL VELOCITY (CFS) (INCHES) (DEGREES) ELEVATION DEPTH(FT.) (FT /SEC) UPSTREAM 69.30 36.00 .00 208.00 2.65 9.804 DOWNSTREAM 74.70 36.00 - 208.00 2.72 11.102 LATERAL #1 5.40 18.00 64.00 208.75 .90 3.056 LATERAL #2 .00 .00 .00 .00 .00 .000 Q5 .00 = = =Q5 EQUALS BASIN INPUT = == LACFCD AND OCEMA FLOW JUNCTION FORMULAE USED: DY=(Q2*V2-Ql*Vl*COS(DELTAl)-Q3*V3*COS(DELTA3)- Q4 *V4 *COS(DELTA4)) /((A1 +A2) *16.1) +FRICTION LOSSES UPSTREAM: MANNING'S N = .01300; FRICTION SLOPE _ .01079 DOWNSTREAM: MANNING'S N = .01300; FRICTION SLOPE _ .01099 AVERAGED FRICTION SLOPE IN JUNCTION ASSUMED AS .01089 JUNCTION LENGTH = 1.50 FEET FRICTION LOSSES = .016 FEET ENTRANCE LOSSES = .000 FEET JUNCTION LOSSES = (DY +HV1 -HV2) +(ENTRANCE LOSSES) JUNCTION LOSSES = ( .237) +( .000) _ .237 ------------------------------------------------------------------------ - - - - -- NODE 3259.34 : HGL = < 211.374 >;EGL = < 212.867 >;FLOWLINE = < 208.000> FLOW PROCESS FROM NODE 3259.34 TO NODE 3281.70 IS CODE = 1 UPSTREAM NODE 3281.70 ELEVATION = 208.47 (FLOW IS UNDER PRESSURE) ------------------------------------------------------------------------------ CALCULATE FRICTION LOSSES(LACFCD): PIPE FLOW = 69.30 CFS PIPE DIAMETER = 36.00 INCHES PIPE LENGTH = 22.36 FEET MANNING'S N = .01300 SF= (Q /K) * *2 = (( 69.30)/( 666.990)) * *2 = .01080 HF =L *SF = ( 22.36) *( .01080) _ .241 ------------------------------------------------------------------------------ NODE 3281.70 : HGL = < 211.616 >;EGL = < 213.108 >;FLOWLINE = < 208.470> ********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 3281.70 TO NODE 3285.70 IS CODE = 5 UPSTREAM NODE 3285.70 ELEVATION = 209.47 (FLOW IS UNDER PRESSURE) (NOTE: POSSIBLE JUMP IN OR UPSTREAM OF STRUCTURE) ------------------------------------------------------------------------------ CALCULATE JUNCTION LOSSES: PIPE FLOW DIAMETER ANGLE FLOWLINE CRITICAL VELOCITY (CFS) (INCHES) (DEGREES) ELEVATION DEPTH(FT.) (FT /SEC) UPSTREAM 37.50 24.00 61.00 209.47 1.94 19.006 DOWNSTREAM 69.30 36.00 - 208.47 2.65 9.804 LATERAL #1 31.80 24.00 .00 209.47 1.89 10.354 LATERAL #2 .00 .00 .00 .00 .00 .000 Q5 .00 = = =Q5 EQUALS BASIN INPUT = == LACFCD AND OCEMA FLOW JUNCTION FORMULAE USED: DY=(Q2*V2-Ql*Vl*COS(DELTAl)-Q3*V3*COS(DELTA3)- Q4 *V4 *COS(DELTA4)) /((Al +A2) *16.1) +FRICTION LOSSES UPSTREAM: MANNING'S N = .01300; FRICTION SLOPE _ .06049 DOWNSTREAM: MANNING'S N = .01300; FRICTION SLOPE _ .01079 AVERAGED FRICTION SLOPE IN JUNCTION ASSUMED AS .03564 JUNCTION LENGTH = 4.00 FEET FRICTION LOSSES = .143 FEET ENTRANCE LOSSES = .000 FEET JUNCTION LOSSES = (DY +HV1 -HV2) +(ENTRANCE LOSSES) JUNCTION LOSSES = ( 3.174) +( .000) = 3.174 ------------------------------------------------------------------------------ NODE 3285.70 : HGL = < 210.673 >;EGL = < 216.282 >;FLOWLINE = < 209.470> FLOW PROCESS FROM NODE 3285.70 TO NODE 3462.80 IS CODE = 1 UPSTREAM NODE 3462.80 ELEVATION = 219.88 (FLOW IS SUPERCRITICAL) ----------------------------------------------------------------------------- CALCULATE FRICTION LOSSES(LACFCD): PIPE FLOW = 37.50 CFS PIPE DIAMETER = 24.00 INCHES PIPE LENGTH = 177.10 FEET MANNING'S N = .01300 ------------------------------------------------------------------------------ NORMAL DEPTH(FT) = 1.21 CRITICAL DEPTH(FT) = 1.94 UPSTREAM CONTROL ASSUMED FLOWDEPTH(FT) = 1.08 GRADUALLY VARIED FLOW PROFILE COMPUTED INFORMATION: ----------------------------------------------------------------------------- DISTANCE FROM FLOW DEPTH VELOCITY SPECIFIC PRESSURE+ CONTROL(FT) (FT) (FT /SEC) ENERGY(FT) MOMENTUM(POUNDS) .000 1.083 21.583 8.321 1619.15 4.095 1.090 21.423 8.220 1608.18 8.372 1.096 21.265 8.122 1597.40 12.852 1.103 21.109 8.026 1586.80 17.559 1.109 20.955 7.932 1576.38 22.523 1.116 20.804 7.841 1566.13 27.780 1.122 20.656 7.752 1556.06 33.374 1.129 20.509 7.664 1546.15 39.359 1.135 20.365 7.579 1536.40 45.804 1.142 20.223 7.496 1526.82 52.797 1.149 20.082 7.415 1517.39 60.454 1.155 19.944 7.336 1508.12 68.933 1.162 19.808 7.258 1499.00 78.453 1.168 19.674 7.182 1490.03 89.338 1.175 19.542 7.108 1481.21 102.089 1.181 19.412 7.036 1472.53 117.544 1.188 19.284 6.966 1464.00 137.276 1.194 19.157 6.897 1455.60 164.820 1.201 19.033 6.829 1447.34 177.100 1.203 19.000 6.812 1445.19 ----------------------------------------------------------------------------- NODE 3462.80 : HGL = < 220.963 >;EGL = < 228.201 >;FLOWLINE = < 219.880> ********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 3462.80 TO NODE 3466.80 IS CODE = 5 UPSTREAM NODE 3466.80 ELEVATION = 220.38 (FLOW IS SUPERCRITICAL) ----------------------------------------------------------------------------- CALCULATE JUNCTION LOSSES: PIPE FLOW DIAMETER ANGLE FLOWLINE CRITICAL VELOCITY (CFS) (INCHES) (DEGREES) ELEVATION DEPTH(FT.) (FT /SEC) UPSTREAM 37.50 18.00 .00 220.38 1.50 21.223 DOWNSTREAM 37.50 24.00 - 219.88 1.94 21.590 - LATERAL #1 .00 .00 .00 .00 .00 .000 LATERAL #2 .00 .00 .00 .00 .00 .000 Q5 .00 = = =Q5 EQUALS BASIN INPUT = == LACFCD AND OCEMA FLOW JUNCTION FORMULAE USED: DY=(Q2*V2-Ql*Vl*COS(DELTAl)-Q3*V3*COS(DELTA3)- Q4 *V4* COS( DELTA4 )) /((Al +A2) *16.1) +FRICTION LOSSES UPSTREAM: MANNING'S N = .01300; FRICTION SLOPE = .12297 DOWNSTREAM: MANNING'S N = .01300; FRICTION SLOPE = .08423 AVERAGED FRICTION SLOPE IN JUNCTION ASSUMED AS .10360 JUNCTION LENGTH = 4.00 FEET FRICTION LOSSES = .414 FEET ENTRANCE LOSSES = .000 FEET JUNCTION LOSSES = (DY +HV1 -HV2) +(ENTRANCE LOSSES) JUNCTION LOSSES = ( .670) +( .000) = .670 NODE 3466.80 : HGL = < 221.877 >;EGL = < 228.872 >;FLOWLINE = < 220.380> FLOW PROCESS FROM NODE 3466.80 TO NODE 3649.20 IS CODE = 1 UPSTREAM NODE 3649.20 ELEVATION = 233.54 (FLOW UNSEALS IN REACH) ------------------------------------------------------------------------------ CALCULATE FRICTION LOSSES(LACFCD): PIPE FLOW = 37.50 CFS PIPE DIAMETER = 18.00 INCHES PIPE LENGTH = 182.40 FEET MANNING'S N = .01300 = = => NORMAL PIPEFLOW IS PRESSURE FLOW ----------------------------------------------------------------------------- NORMAL DEPTH(FT) = 1.50 CRITICAL DEPTH(FT) = 1.50 ------------------------------------------------------------------------------ DOWNSTREAM CONTROL ASSUMED FLOWDEPTH(FT) = 1.50 ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ GRADUALLY VARIED FLOW PROFILE COMPUTED INFORMATION: DISTANCE FROM FLOW DEPTH VELOCITY SPECIFIC PRESSURE+ CONTROL(FT) (FT) (FT /SEC) ENERGY(FT) MOMENTUM(POUNDS) .000 1.497 21.217 8.492 1624.73 .000 1.497 21.217 8.492 1624.73 .000 1.498 21.216 8.492 1624.73 .000 1.498 21.216 8.492 1624.73 .001 1.498 21.216 8.492 1624.73 .001 1.498 21.216 8.492 1624.73 - .001 1.498 21.216 8.492 1624.73 .002 1.498 21.215 8.492 1624.74 .002 1.498 21.215 8.492 1624.74 .003 1.499 21.215 8.492 1624.74 .004 1.499 21.215 8.492 1624.75 .004 1.499 21.215 8.492 1624.75 .005 1.499 21.215 8.492 1624.76 .006 1.499 21.215 8.492 1624.76 .007 1.499 21.215 8.492 1624.77 .009 1.499 21.214 8.492 1624.78 - .010 1.499 21.214 8.492 1624.78 .011 1.500 21.214 8.492 1624.79 .013 1.500 21.214 8.492 1624.80 .015 1.500 21.214 8.492 1624.81 .017 1.500 21.214 8.492 1624.82 FLOW IS UNDER PRESSURE 182.400 11.585 21.221 18.578 2736.92 ----------------------------------------------------------------------------- NODE 3649.20 : HGL = < 245.125 >;EGL = < 252.118 >;FLOWLINE = < 233.540> *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 3649.20 TO NODE 3653.20 IS CODE = 5 UPSTREAM NODE 3653.20 ELEVATION = 233.87 (FLOW IS UNDER PRESSURE) ------------------------------------------------------------------------------ CALCULATE JUNCTION LOSSES: PIPE FLOW DIAMETER ANGLE FLOWLINE CRITICAL VELOCITY (CFS) (INCHES) (DEGREES) ELEVATION DEPTH(FT.) (FT /SEC) - UPSTREAM 29.40 18.00 10.00 233.87 1.49 16.637 DOWNSTREAM 37.50 18.00 - 233.54 1.50 21.221 LATERAL #1 8.10 18.00 90.00 233.87 1.10 4.584 LATERAL #2 .00 .00 .00 .00 .00 .000 Q5 .00 = = =Q5 EQUALS BASIN INPUT = == LACFCD AND OCEMA FLOW JUNCTION FORMULAE USED: DY=(Q2*V2-Ql*Vl*COS(DELTAl)-Q3*V3*COS(DELTA3)- Q4 *V4 *COS(DELTA4)) /((Al +A2) *16.1) +FRICTION LOSSES UPSTREAM: MANNING'S N = .01300; FRICTION SLOPE _ .07833 -- DOWNSTREAM: MANNING'S N = .01300; FRICTION SLOPE _ .12744 AVERAGED FRICTION SLOPE IN JUNCTION ASSUMED AS .10289 JUNCTION LENGTH = 4.00 FEET FRICTION LOSSES = .412 FEET ENTRANCE LOSSES = .000 FEET JUNCTION LOSSES = (DY +HV1 -HV2) +(ENTRANCE LOSSES) JUNCTION LOSSES = ( 3.237) +( .000) = 3.237 _._ NODE 3653.20 : HGL = < 251.056 >;EGL = < 255.354 >;FLOWLINE = < 233.870> *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** _FLOW PROCESS FROM NODE 3653.20 TO NODE 3818.16 IS CODE = 1 UPSTREAM NODE 3818.16 ELEVATION = 246.15 (FLOW IS UNDER PRESSURE) ------------------------------------------------------------------------------ CALCULATE FRICTION LOSSES(LACFCD): PIPE FLOW = 29.40 CFS PIPE DIAMETER = 18.00 INCHES PIPE LENGTH = 164.96 FEET MANNING'S N = .01300 SF= (Q /K) * *2 = (( 29.40)/( 105.043)) * *2 = .07834 HF =L *SF = ( 164.96) *( .07834) = 12.922 ------------------------------------------------------------------------------ NODE 3818.16 : HGL = < 263.979 >;EGL = < 268.276 >;FLOWLINE = < 246.150> ********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 3818.16 TO NODE 3818.16 IS CODE = 2 UPSTREAM NODE 3818.16 ELEVATION = 246.15 (FLOW IS UNDER PRESSURE) ----------------------------------------------------------------------------- CALCULATE MANHOLE LOSSES(LACFCD): PIPE FLOW = 29.40 CFS PIPE DIAMETER = 18.00 INCHES FLOW VELOCITY = 16.64 FEET /SEC. VELOCITY HEAD = 4.298 FEET HMN = .05 *(VELOCITY HEAD) _ .05 *( 4.298) _ .215 ------------------------------------------------------------------------------ NODE 3818.16 : HGL = < 264.193 >;EGL = < 268.491 >;FLOWLINE = < 246.150> *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 3818.16 TO NODE 3929.43 IS CODE = 1 UPSTREAM NODE 3929.43 ELEVATION = 257.05 (FLOW IS UNDER PRESSURE) ------------------------------------------------------------------------------ CALCULATE FRICTION LOSSES(LACFCD): PIPE FLOW = 29.40 CFS PIPE DIAMETER = 18.00 INCHES PIPE LENGTH = 111.27 FEET MANNING'S N = .01300 SF= (Q /K) * *2 = (( 29.40)/( 105.044)) * *2 = .07834 HF =L *SF = ( 111.27) *( .07834) = 8.716 ----------------------------------------------------------------------------- NODE 3929.43 : HGL = < 272.910 >;EGL = < 277.208 >;FLOWLINE = < 257.050> ********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 3929.43 TO NODE 3933.43 IS CODE = 5 UPSTREAM NODE 3933.43 ELEVATION = 257.38 (FLOW IS UNDER PRESSURE) ----------------------------------------------------------------------------- CALCULATE JUNCTION LOSSES: PIPE FLOW DIAMETER ANGLE FLOWLINE CRITICAL VELOCITY (CFS) (INCHES) (DEGREES) ELEVATION DEPTH(FT.) (FT /SEC) UPSTREAM 26.50 18.00 .00 257.38 1.49 14.996 DOWNSTREAM 29.40 18.00 - 257.05 1.49 16.637 LATERAL #1 2.90 18.00 80.00 257.38 .65 1.641 LATERAL #2 .00 .00 .00 .00 .00 .000 Q5 .00 = = =Q5 EQUALS BASIN INPUT = == LACFCD AND OCEMA FLOW JUNCTION FORMULAE USED: DY=(Q2*V2-Ql*V1*COS(DELTAl)-Q3*V3*COS(DELTA3)- Q4 *V4* COS( DELTA4 )) /((Al +A2) *16.1) +FRICTION LOSSES UPSTREAM: MANNING'S N = .01300; FRICTION SLOPE _ .06364 DOWNSTREAM: MANNING'S N = .01300; FRICTION SLOPE _ .07833 AVERAGED FRICTION SLOPE IN JUNCTION ASSUMED AS .07099 JUNCTION LENGTH = 4.00 FEET FRICTION LOSSES = .284 FEET ENTRANCE LOSSES = .000 FEET JUNCTION LOSSES = (DY +HV1-HV2) +(ENTRANCE LOSSES) JUNCTION LOSSES = ( 1.076) +( .000) = 1.076 ----------------------------------------------------------------------------- NODE 3933.43 : HGL = < 274.791 >;EGL = < 278.283 >;FLOWLINE = < 257.380> ********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 3933.43 TO NODE 4113.88 IS CODE = 1 UPSTREAM NODE 4113.88 ELEVATION = 274.05 (FLOW IS UNDER PRESSURE) ------------------------------------------------------------------------ - - - - -- CALCULATE FRICTION LOSSES(LACFCD): PIPE FLOW = 26.50 CFS PIPE DIAMETER = 18.00 INCHES PIPE LENGTH = 180.45 FEET MANNING'S N = .01300 SF= (Q /K) * *2 = (( 26.50)/( 105.043)) * *2 = .06364 HF =L *SF = ( 180.45) *( .06364) = 11.484 ------------------------------------------------------------------------------ NODE 4113.88 : HGL = < 286.276 >;EGL = < 289.768 >; FLOWLINE = < 274.050> *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 4113.88 TO NODE 4117.88 IS CODE = 5 UPSTREAM NODE 4117.88 ELEVATION = 274.38 (FLOW IS UNDER PRESSURE) ------------------------------------------------------------------------------ CALCULATE JUNCTION LOSSES: PIPE FLOW DIAMETER ANGLE FLOWLINE CRITICAL VELOCITY (CFS) (INCHES) (DEGREES) ELEVATION DEPTH(FT.) (FT /SEC) UPSTREAM 14.90 18.00 45.00 274.38 1.40 8.432 DOWNSTREAM 26.50 18.00 - 274.05 1.49 14.996 LATERAL #1 11.60 18.00 45.00 274.38 1.30 6.564 LATERAL #2 .00 .00 .00 .00 .00 .000 Q5 .00 = = =Q5 EQUALS BASIN INPUT = == LACFCD AND OCEMA FLOW JUNCTION FORMULAE USED: DY=(Q2*V2-Ql*Vl*COS(DELTAl)-Q3*V3*COS(DELTA3)- Q4 *V4 *COS(DELTA4)) /((Al +A2) *16.1) +FRICTION LOSSES UPSTREAM: MANNING'S N = .01300; FRICTION SLOPE _ .02012 DOWNSTREAM: MANNING'S N = .01300; FRICTION SLOPE _ .06364 AVERAGED FRICTION SLOPE IN JUNCTION ASSUMED AS .04188 JUNCTION LENGTH = 4.00 FEET FRICTION LOSSES = .168 FEET ENTRANCE LOSSES = .000 FEET JUNCTION LOSSES = (DY +HV1 -HV2) +(ENTRANCE LOSSES) JUNCTION LOSSES = ( 2.256) +( .000) = 2.256 ------------------------------------------------------------------------------ NODE 4117.88 : HGL = < 290.920 >;EGL = < 292.024 >; FLOWLINE = < 274.380> UPSTREAM PIPE FLOW CONTROL DATA: NODE NUMBER = 4117.88 FLOWLINE ELEVATION = 274.38 ASSUMED UPSTREAM CONTROL HGL = 275.78 FOR DOWNSTREAM RUN ANALYSIS ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ END OF GRADUALLY VARIED FLOW ANALYSIS *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** PIPE -FLOW HYDRAULICS COMPUTER PROGRAM PACKAGE (Reference: LACFCD,LACRD, AND OCEMA HYDRAULICS CRITERION) (c) Copyright 1982 -93 Advanced Engineering Software (aes) Ver. 4.6A Release Date: 7/18/93 License ID 1415 Analysis prepared by: NOLTE and ASSOCIATES, Inc. 5469 Kearny Villa Road, Suit 305 San Diego, CA 92123 (619) 278 -9393 FAX No. (619) 278 -4628 * * * * * * * * * * * * * * * * * * * * * * * * ** DESCRIPTION OF STUDY * * * * * * * * * * * * * * * * * * * * * * * * ** • LEUCADIA BLVD • LINE A 100 YR STORM * ******************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** -- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - FILE NAME: SDLINEA.DAT TIME /DATE OF STUDY: 10:10 3/27/1996 *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** GRADUALLY VARIED FLOW ANALYSIS FOR PIPE SYSTEM NODAL POINT STATUS TABLE (Note: " *" indicates nodal point data used.) UPSTREAM RUN DOWNSTREAM RUN NODE MODEL PRESSURE PRESSURE+ FLOW PRESSURE+ NUMBER PROCESS HEAD(FT) MOMENTUM(POUNDS) DEPTH(FT) MOMENTUM(POUNDS) 2809.29- 3.00 3978.90 2.61* 4089.33 } FRICTION 2873.75- 2.93 *Dc 3968.14 2.93 *Dc 3968.14 } JUNCTION 2877.75- 3.28* 3866.91 2.92 Dc 3729.58 } FRICTION 2999.77- 4.44* 4379.37 2.92 Dc 3729.58 } JUNCTION 2999.77- 5.73* 4394.58 2.88 Dc 3169.95 } FRICTION 3134.64- 6.34* 4660.81 2.74 3186.94 } JUNCTION 3134.64- 7.39* 4673.29 2.00 3203.97 } FRICTION 3162.15- 7.49* 4716.69 1.91 3339.19 } JUNCTION 3166.15- 4.46 3381.01 1.78* 3570.92 } FRICTION 3209.00- 2.83 Dc 2710.16 2.54* 2763.92 } FRICTION 3259.34- 2.83 *Dc 2710.16 2.83 *Dc 2710.16 } JUNCTION 3259.34- 3.56* 2705.50 2.45 2488.80 } FRICTION - 3281.70- 3.42* 2643.65 2.78 Dc 2425.91 } JUNCTION 3285.70- 3.63 1656.49 1.31* 1727.30 } FRICTION 3462.80- 1.96 Dc 1334.21 1.10* 2083.73 } JUNCTION 3466.80- 1.50 *Dc 2110.30 1.50 *Dc 2110.30 } FRICTION 3649.20- 18.90* 4029.54 1.50 Dc 2110.30 } JUNCTION 3653.20- 26.19* 4072.47 1.50 Dc 1350.25 } FRICTION 3818.16- 31.19* 4624.07 1.50 Dc 1350.25 } MANHOLE 3818.16- 31.48* 4655.76 1.49 Dc 1350.44 } FRICTION 3929.43- 32.23* 4739.27 1.50 Dc 1350.25 } JUNCTION 3933.43- 34.21* 4743.48 1.21 1274.30 } FRICTION 4113.88- 33.26* 4638.29 1.49 Dc 1136.34 } JUNCTION 4117.88- 39.30* 4567.73 1.44 Dc 397.36 ------------------------------------------------------------------------------ MAXIMUM NUMBER OF ENERGY BALANCES USED IN EACH PROFILE = 20 ------------------------------------------------------------------------------ NOTE: STEADY FLOW HYDRAULIC HEAD -LOSS COMPUTATIONS BASED ON THE MOST CONSERVATIVE FORMULAE FROM THE CURRENT LACRD,LACFCD, AND OCEMA DESIGN MANUALS. *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** DOWNSTREAM PIPE FLOW CONTROL DATA: NODE NUMBER = 2809.29 FLOWLINE ELEVATION = 191.16 PIPE FLOW = 110.00 CFS PIPE DIAMETER = 36.00 INCHES ASSUMED DOWNSTREAM CONTROL HGL = 194.160 ------------------------------------------------------------------------------ NODE 2809.29 : HGL = < 193.766 >;EGL = < 198.185 >;FLOWLINE = < 191.160> FLOW PROCESS FROM NODE 2809.29 TO NODE 2873.75 IS CODE = 1 UPSTREAM NODE 2873.75 ELEVATION = 193.00 (FLOW IS SUPERCRITICAL) ------------------------------------------------------------------------------ CALCULATE FRICTION LOSSES(LACFCD): PIPE FLOW = 110.00 CFS PIPE DIAMETER = 36.00 INCHES PIPE LENGTH = 64.46 FEET MANNING'S N = .01300 ----------------------------------------------------------------------------- NORMAL DEPTH(FT) = 2.40 CRITICAL DEPTH(FT) = 2.93 ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ UPSTREAM CONTROL ASSUMED FLOWDEPTH(FT) = 2.93 ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ GRADUALLY VARIED FLOW PROFILE COMPUTED INFORMATION: DISTANCE FROM FLOW DEPTH VELOCITY SPECIFIC PRESSURE+ CONTROL(FT) (FT) (FT /SEC) ENERGY(FT) MOMENTUM(POUNDS) .000 2.927 15.656 6.736 3968.14 .520 2.901 15.716 6.738 3969.18 1.941 2.874 15.784 6.745 3972.15 4.144 2.848 15.860 6.756 3976.88 7.082 2.821 15.944 6.771 3983.25 10.749 2.795 16.034 6.789 3991.17 15.172 2.768 16.131 6.811 4000.60 20.403 2.742 16.235 6.837 4011.49 26.527 2.715 16.345 6.866 4023.82 33.658 2.689 16.462 6.899 4037.57 41.955 2.662 16.585 6.936 4052.73 51.635 2.636 16.714 6.976 4069.31 62.998 AVERAGED FRICTION SLOPE IN JUNCTION ASSUMED AS .02471 2.609 16.849 7.020 4087.30 64.460 2.606 16.864 7.025 4089.33 ----------------------------------------------------------------------------- NODE 2873.75 : HGL = < 195.927 >;EGL = < 199.736 >; FLOWLINE = < 193.000> ********************************************** UPSTREAM NODE 2999.77 ELEVATION = 195.25 (FLOW IS UNDER * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 2873.75 TO NODE 2877.75 IS CODE = 5 SF= (Q /K) * *2 = (( 106.00)/( 666.986)) * *2 = .02526 UPSTREAM NODE 2877.75 ELEVATION = 193.33 (FLOW IS AT CRITICAL DEPTH) ----------------------------------------------------------------------------- CALCULATE JUNCTION LOSSES: * * * * * * * * * * ** FLOW PROCESS FROM NODE 2999.77 TO NODE 2999.77 IS CODE = 5 PIPE FLOW DIAMETER ANGLE FLOWLINE CRITICAL VELOCITY _ (CFS) (INCHES) (DEGREES) ELEVATION DEPTH(FT.) (FT /SEC) UPSTREAM 106.00 36.00 .00 193.33 2.92 14.996 DOWNSTREAM 110.00 36.00 - 193.00 2.93 15.661 LATERAL #1 4.00 18.00 90.00 194.67 .77 2.264 LATERAL #2 .00 .00 .00 .00 .00 .000 Q5 .00 = = =Q5 EQUALS BASIN INPUT = == LACFCD AND OCEMA FLOW JUNCTION FORMULAE USED: DY=( Q2* V2- Q1* Vl *COS(DELTAl)- Q3 *V3 *COS(DELTA3)- Q4 *V4 *COS(DELTA4)) /((Al +A2) *16.1) +FRICTION LOSSES UPSTREAM: MANNING'S N = .01300; FRICTION SLOPE _ .02526 DOWNSTREAM: MANNING'S N = .01300; FRICTION SLOPE _ .02416 AVERAGED FRICTION SLOPE IN JUNCTION ASSUMED AS .02471 JUNCTION LENGTH = 4.00 FEET FRICTION LOSSES = .099 FEET ENTRANCE LOSSES = .000 FEET JUNCTION LOSSES = (DY +HV1 -HV2) +(ENTRANCE LOSSES) JUNCTION LOSSES = ( .369) +( .000) _ .369 ------------------------------------------------------------------------------ NODE 2877.75 : HGL = < 196.613 >;EGL = < 200.105 >; FLOWLINE = < 193.330> *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 2877.75 TO NODE 2999.77 IS CODE = 1 UPSTREAM NODE 2999.77 ELEVATION = 195.25 (FLOW IS UNDER PRESSURE) ------------------------------------------------------------------------------ CALCULATE FRICTION LOSSES(LACFCD): PIPE FLOW = 106.00 CFS PIPE DIAMETER = 36.00 INCHES PIPE LENGTH = 122.02 FEET MANNING'S N = .01300 SF= (Q /K) * *2 = (( 106.00)/( 666.986)) * *2 = .02526 HF =L *SF = ( 122.02) *( .02526) = 3.082 ----------------------------------------------------------------------------- NODE 2999.77 : HGL = < 199.695 >;EGL = < 203.187 >; FLOWLINE = < 195.250> ********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 2999.77 TO NODE 2999.77 IS CODE = 5 UPSTREAM NODE 2999.77 ELEVATION = 195.25 (FLOW IS UNDER PRESSURE) ----------------------------------------------------------------------------- CALCULATE JUNCTION LOSSES: PIPE FLOW DIAMETER ANGLE FLOWLINE CRITICAL VELOCITY (CFS) (INCHES) (DEGREES) ELEVATION DEPTH(FT.) (FT /SEC) UPSTREAM 96.00 36.00 .00 195.25 2.88 13.581 DOWNSTREAM 106.00 36.00 - 195.25 2.92 14.996 LATERAL #1 10.00 18.00 90.00 196.00 1.22 5.659 LATERAL #2 .00 .00 .00 .00 .00 .000 Q5 .00 = = =Q5 EQUALS BASIN INPUT = == LACFCD AND OCEMA FLOW JUNCTION FORMULAE USED: DY=(Q2*V2-Ql*V1*COS(DELTAI)-Q3*V3*COS(DELTA3)- Q4 *V4 *COS(DELTA4)) /((A1 +A2) *16.1) +FRICTION LOSSES UPSTREAM: MANNING'S N = .01300; FRICTION SLOPE _ .02071 DOWNSTREAM: MANNING'S N = .01300; FRICTION SLOPE _ .02526 AVERAGED FRICTION SLOPE IN JUNCTION ASSUMED AS .02299 JUNCTION LENGTH = 1.50 FEET FRICTION LOSSES = .034 FEET ENTRANCE LOSSES = .000 FEET JUNCTION LOSSES = (DY +HV1 -HV2) +(ENTRANCE LOSSES) JUNCTION LOSSES = ( .662) +( .000) _ .662 ----------------------------------------------------------------------------- NODE 2999.77 : HGL = < 200.985 >;EGL = < 203.849 >; FLOWLINE = < 195.250> ********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 2999.77 TO NODE 3134.64 IS CODE = 1 UPSTREAM NODE 3134.64 ELEVATION = 197.44 (FLOW IS UNDER PRESSURE) ----------------------------------------------------------------------------- CALCULATE FRICTION LOSSES(LACFCD): PIPE FLOW = 96.00 CFS PIPE DIAMETER = 36.00 INCHES PIPE LENGTH = 134.85 FEET MANNING'S N = .01300 SF= (Q /K) * *2 = (( 96.00)/( 666.985)) * *2 = .02072 HF =L *SF = ( 134.85) *( .02072) = 2.794 ----------------------------------------------------------------------------- NODE 3134.64 : HGL = < 203.779 >;EGL = < 206.643 >; FLOWLINE = < 197.440> *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 3134.64 TO NODE 3134.64 IS CODE = 5 UPSTREAM NODE 3134.64 ELEVATION = 197.44 (FLOW IS UNDER PRESSURE) ------------------------------------------------------------------------------ CALCULATE JUNCTION LOSSES: PIPE FLOW DIAMETER ANGLE FLOWLINE CRITICAL VELOCITY (CFS) (INCHES) (DEGREES) ELEVATION DEPTH(FT.) (FT /SEC) UPSTREAM 87.00 36.00 .00 197.44 2.83 12.308 DOWNSTREAM 96.00 36.00 - 197.44 2.88 13.581 LATERAL #1 9.00 18.00 90.00 198.94 1.16 5.093 LATERAL #2 .00 .00 .00 .00 .00 .000 Q5 .00 = = =Q5 EQUALS BASIN INPUT = == LACFCD AND OCEMA FLOW JUNCTION FORMULAE USED: DY=(Q2*V2-Ql*Vl*COS(DELTAl)-Q3*V3*COS(DELTA3)- Q4 *V4 *COS(DELTA4)) /((Al +A2) *16.1) +FRICTION LOSSES UPSTREAM: MANNING'S N = .01300; FRICTION SLOPE _ .01701 DOWNSTREAM: MANNING'S N = .01300; FRICTION SLOPE _ .02071 AVERAGED FRICTION SLOPE IN JUNCTION ASSUMED AS .01886 JUNCTION LENGTH = 1.50 FEET FRICTION LOSSES = .028 FEET ENTRANCE LOSSES = .000 FEET JUNCTION LOSSES = (DY +HV1- HV2) +(ENTRANCE LOSSES) JUNCTION LOSSES = ( .540) +( .000) _ .540 ------------------------------------------------------------------------------ NODE 3134.64 : HGL = < 204.831 >;EGL = < 207.183 >; FLOWLINE = < 197.440> FLOW PROCESS FROM NODE 3134.64 TO NODE 3162.15 IS CODE = 1 UPSTREAM NODE 3162.15 ELEVATION = 197.81 (FLOW IS UNDER PRESSURE) ----------------------------------------------------------------------------- CALCULATE FRICTION LOSSES(LACFCD): PIPE FLOW = 87.00 CFS PIPE DIAMETER = 36.00 INCHES PIPE LENGTH = 27.53 FEET MANNING'S N = .01300 SF= (Q /K) * *2 = (( 87.00)/( 666.982)) * *2 = .01701 HF =L *SF = ( 27.53) *( .01701) _ .468 NODE 3162.15 : HGL = < 205.299 >;EGL = < 207.651 >; FLOWLINE = < 197.810> ********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 3162.15 TO NODE 3166.15 IS CODE = 5 UPSTREAM NODE 3166.15 ELEVATION = 203.33 (FLOW IS UNDER PRESSURE) (NOTE: POSSIBLE JUMP IN OR UPSTREAM OF STRUCTURE) ------------------------------------------------------------------------ - - - - -- CALCULATE JUNCTION LOSSES: PIPE FLOW DIAMETER ANGLE FLOWLINE CRITICAL VELOCITY (CFS) (INCHES) (DEGREES) ELEVATION DEPTH(FT.) (FT /SEC) UPSTREAM 87.00 36.00 61.00 203.33 2.83 19.942 DOWNSTREAM 87.00 36.00 - 197.81 2.83 12.308 LATERAL #1 .00 .00 .00 .00 .00 .000 LATERAL #2 .00 .00 .00 .00 .00 .000 Q5 .00 = = =Q5 EQUALS BASIN INPUT = == = 1.39 CRITICAL DEPTH(FT) = 2.83 LACFCD AND OCEMA FLOW JUNCTION FORMULAE USED: DY=( Q2* V2- Ql* Vl *COS(DELTAl)- Q3 *V3 *COS(DELTA3)- Q4 *V4 *COS(DELTA4)) /((A1 +A2) *16.1) +FRICTION LOSSES UPSTREAM: MANNING'S N = .01300; FRICTION SLOPE = .03916 DOWNSTREAM: MANNING'S N = .01300; FRICTION SLOPE = .01701 AVERAGED FRICTION SLOPE IN JUNCTION ASSUMED AS .02809 JUNCTION LENGTH = 4.00 FEET FRICTION LOSSES = .112 FEET ENTRANCE LOSSES = .000 FEET JUNCTION LOSSES = (DY +HV1 -HV2) +(ENTRANCE LOSSES) JUNCTION LOSSES = ( 3.631) +( .000) = 3.631 ----------------------------------------------------------------------------- NODE 3166.15 : HGL = < 205.108 >;EGL = < 211.283 >;FLOWLINE = < 203.330> ********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 3166.15 TO NODE 3209.00 IS CODE = 1 UPSTREAM NODE 3209.00 ELEVATION = 207.09 (FLOW IS SUPERCRITICAL) ----------------------------------------------------------------------------- CALCULATE FRICTION LOSSES(LACFCD): PIPE FLOW = 87.00 CFS PIPE DIAMETER = 36.00 INCHES PIPE LENGTH = 42.85 FEET MANNING'S N = .01300 ----------------------------------------------------------------------------- NORMAL DEPTH(FT) = 1.39 CRITICAL DEPTH(FT) = 2.83 UPSTREAM CONTROL ASSUMED FLOWDEPTH(FT) = 2.54 ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ GRADUALLY VARIED FLOW PROFILE COMPUTED INFORMATION: ----------------------------------------------------------------------------- DISTANCE FROM FLOW DEPTH VELOCITY SPECIFIC PRESSURE+ CONTROL(FT) (FT) (FT /SEC) ENERGY(FT) MOMENTUM(POUNDS) .000 2.543 13.615 5.423 2763.92 .849 2.485 13.891 5.483 2787.81 1.894 2.428 14.192 5.557 2816.35 3.158 2.370 14.519 5.646 2849.75 4.669 2.313 14.873 5.750 2888.28 6.465 2.255 15.256 5.872 2932.23 8.588 2.198 15.671 6.014 2981.97 11.095 2.140 16.119 6.178 3037.92 14.054 2.083 16.603 6.366 3100.54 17.556 2.026 17.127 6.583 3170.37 21.717 1.968 17.694 6.833 3248.04 26.692 1.911 18.308 7.119 3334.25 32.692 1.853 18.974 7.447 3429.81 40.016 1.796 19.697 7.824 3535.66 42.850 1.778 19.935 7.953 3570.92 ------------------------------------------------------------------------------ NODE 3209.00 : HGL = < 209.633 >;EGL = < 212.513 >;FLOWLINE = < 207.090> *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 3209.00 TO NODE 3259.34 IS CODE = 1 UPSTREAM NODE 3259.34 ELEVATION = 208.00 (FLOW IS SUPERCRITICAL) ------------------------------------------------------------------------------ CALCULATE FRICTION LOSSES(LACFCD): (DEGREES) ELEVATION DEPTH(FT.) PIPE FLOW = 87.00 CFS PIPE DIAMETER = 36.00 INCHES PIPE LENGTH = 50.34 FEET MANNING'S N = .01300 ------------------------------------------------------------------------------ NORMAL DEPTH(FT) = 2.38 CRITICAL DEPTH(FT) = 2.83 UPSTREAM CONTROL ASSUMED FLOWDEPTH(FT) = 2.83 2.83 ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ e GRADUALLY VARIED FLOW PROFILE COMPUTED INFORMATION: 18.00 ------------------------------------------------------------------------------- DISTANCE FROM FLOW DEPTH VELOCITY SPECIFIC PRESSURE+ CONTROL(FT) (FT) (FT /SEC) ENERGY(FT) MOMENTUM(POUNDS) .000 2.827 12.596 5.292 2710.16 .241 2.804 12.655 5.293 2710.51 .960 2.782 12.717 5.295 2711.55 2.162 2.760 12.784 5.299 2713.25 3.864 2.738 12.854 5.305 2715.61 6.094 2.715 12.927 5.312 2718.62 8.896 2.693 13.004 5.321 2722.27 12.326 2.671 13.084 5.331 2726.57 16.462 2.649 13.168 5.343 2731.50 21.403 2.626 13.255 5.356 2737.08 27.283 2.604 13.346 5.372 2743.31 34.281 2.582 13.440 5.389 2750.18 42.643 2.560 13.538 5.407 2757.72 50.340 2.543 13.615 5.423 2763.92 ------------------------------------------------------------------------------ NODE 3259.34 : HGL = < 210.827 >;EGL = < 213.292 >;FLOWLINE = < 208.000> ********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 3259.34 TO NODE 3259.34 IS CODE = 5 UPSTREAM NODE ----------------------------------------------------------------------- 3259.34 ELEVATION = 208.00 (FLOW IS AT CRITICAL DEPTH) - - - - -- CALCULATE JUNCTION LOSSES: PIPE FLOW DIAMETER ANGLE FLOWLINE CRITICAL VELOCITY (CFS) (INCHES) (DEGREES) ELEVATION DEPTH(FT.) (FT /SEC) UPSTREAM 81.00 36.00 .00 208.00 2.78 11.459 DOWNSTREAM 87.00 36.00 - 208.00 2.83 12.600 LATERAL #1 6.00 18.00 64.00 208.75 .95 3.395 LATERAL #2 .00 .00 .00 .00 .00 .000 Q5 .00 = = =Q5 EQUALS BASIN INPUT = == LACFCD AND OCEMA FLOW JUNCTION FORMULAE USED: DY=(Q2*V2-Ql*V1*COS(DELTAl)-Q3*V3*COS(DELTA3)- Q4 *V4 *COS(DELTA4)) /((Al +A2) *16.1) +FRICTION LOSSES UPSTREAM: MANNING'S N = .01300; FRICTION SLOPE = .01475 DOWNSTREAM: MANNING'S N = .01300; FRICTION SLOPE = .01471 AVERAGED FRICTION SLOPE IN JUNCTION ASSUMED AS .01473 JUNCTION LENGTH = 1.50 FEET FRICTION LOSSES = .022 FEET ENTRANCE LOSSES = .000 FEET JUNCTION LOSSES = (DY +HV1 -HV2) +(ENTRANCE LOSSES) JUNCTION LOSSES = ( .303) +( .000) = .303 NODE 3259.34 : HGL = < 211.556 >;EGL = < 213.595 >;FLOWLINE = < 208.000> ********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 3259.34 TO NODE 3281.70 IS CODE = 1 UPSTREAM NODE 3281.70 ELEVATION = 208.47 (FLOW IS UNDER PRESSURE) ----------------------------------------------------------------------------- CALCULATE FRICTION LOSSES(LACFCD): PIPE FLOW = 81.00 CFS PIPE DIAMETER = 36.00 INCHES PIPE LENGTH = 22.36 FEET MANNING'S N = .01300 SF= (Q /K) * *2 = (( 81.00)/( 666.981)) * *2 = .01475 HF =L *SF = ( 22.36) *( .01475) _ .330 ----------------------------------------------------------------------------- NODE 3281.70 : HGL = < 211.886 >;EGL = < 213.925 >; FLOWLINE = < 208.470> *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 3281.70 TO NODE 3285.70 IS CODE = 5 UPSTREAM NODE 3285.70 ELEVATION = 209.47 (FLOW IS UNDER PRESSURE) (NOTE: POSSIBLE JUMP IN OR UPSTREAM OF STRUCTURE) ----------------------------------------------------------------------- - - - - -- CALCULATE JUNCTION LOSSES: PIPE FLOW DIAMETER ANGLE FLOWLINE CRITICAL VELOCITY (CFS) (INCHES) (DEGREES) ELEVATION DEPTH(FT.) (FT /SEC) UPSTREAM 43.00 24.00 61.00 209.47 1.96 19.801 DOWNSTREAM 81.00 36.00 - 208.47 2.78 11.459 LATERAL #1 38.00 24.00 .00 209.47 1.94 12.198 LATERAL #2 .00 .00 .00 .00 .00 .000 Q5 .00 = = =Q5 EQUALS BASIN INPUT = == 1986.10 LACFCD AND OCEMA FLOW JUNCTION FORMULAE USED: DY=( Q2* V2- Ql* Vl *COS(DELTAl)- Q3 *V3 *COS(DELTA3)- Q4 *V4 *COS(DELTA4)) /((Al +A2) *16.1) +FRICTION LOSSES UPSTREAM: MANNING'S N = .01300; FRICTION SLOPE _ .06243 DOWNSTREAM: MANNING'S N = .01300; FRICTION SLOPE _ .01475 AVERAGED FRICTION SLOPE IN JUNCTION ASSUMED AS .03859 JUNCTION LENGTH = 4.00 FEET FRICTION LOSSES = .154 FEET ENTRANCE LOSSES = .000 FEET JUNCTION LOSSES = (DY +HV1 -HV2) +(ENTRANCE LOSSES) JUNCTION LOSSES = ( 2.939) +( .000) = 2.939 ------------------------------------------------------------------------------ NODE 3285.70 : HGL = < 210.775 >;EGL = < 216.864 >; FLOWLINE = < 209.470> *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 3285.70 TO NODE 3462.80 IS CODE = 1 UPSTREAM NODE 3462.80 ELEVATION = 219.88 (FLOW IS SUPERCRITICAL) ------------------------------------------------------------------------------ " CALCULATE FRICTION LOSSES(LACFCD): PIPE FLOW = 43.00 CFS PIPE DIAMETER = 24.00 INCHES PIPE LENGTH = 177.10 FEET MANNING'S N = .01300 ------------------------------------------------------------------------------ NORMAL DEPTH(FT) = 1.33 CRITICAL DEPTH(FT) = 1.96 ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ UPSTREAM CONTROL ASSUMED FLOWDEPTH(FT) = 1.10 ----------------------------------------------------------------------------- ----------------------------------------------------------------------------- GRADUALLY VARIED FLOW PROFILE COMPUTED INFORMATION: ------------------------------------------------------------------------------ DISTANCE FROM FLOW DEPTH VELOCITY SPECIFIC PRESSURE+ CONTROL(FT) (FT) (FT /SEC) ENERGY(FT) MOMENTUM(POUNDS) .000 1.096 24.379 10.331 2083.73 5.027 1.108 24.057 10.101 2058.23 10.245 1.120 23.744 9.880 2033.47 15.680 1.132 23.440 9.669 2009.44 21.357 1.144 23.143 9.466 1986.10 27.309 1.156 22.855 9.272 1963.44 33.574 1.168 22.574 9.085 1941.44 40.201 1.179 22.301 8.907 1920.06 47.249 1.191 22.034 8.735 1899.30 54.792 1.203 21.775 8.570 1879.12 62.927 1.215 21.522 8.412 1859.52 71.779 1.227 21.276 8.260 1840.48 81.519 1.239 21.036 8.114 1821.97 92.388 1.250 20.802 7.974 1803.99 104.736 1.262 20.574 7.839 1786.51 119.107 1.274 20.351 7.709 1769.52 136.414 1.286 20.134 7.585 1753.01 158.366 1.298 19.923 7.465 1736.96 177.100 1.305 19.795 7.394 1727.30 ------------------------------------------------------------------------------ NODE 3462.80 : HGL = < 220.976 >;EGL = < 230.211 >;FLOWLINE = < 219.880> FLOW PROCESS FROM NODE 3462.80 TO NODE 3466.80 IS CODE = 5 UPSTREAM NODE 3466.80 ELEVATION = 220.38 (FLOW IS SUPERCRITICAL) ----------------------------------------------------------------------------- CALCULATE JUNCTION LOSSES: PIPE FLOW DIAMETER ANGLE FLOWLINE CRITICAL VELOCITY (CFS) (INCHES) (DEGREES) ELEVATION DEPTH(FT.) (FT /SEC) UPSTREAM 43.00 18.00 .00 220.38 1.50 24.334 DOWNSTREAM 43.00 24.00 - 219.88 1.96 24.387 LATERAL #1 .00 .00 .00 .00 .00 .000 LATERAL #2 .00 .00 .00 .00 .00 .000 Q5 .00 = = =Q5 EQUALS BASIN INPUT = == LACFCD AND OCEMA FLOW JUNCTION FORMULAE USED: DY=(Q2*V2-Ql*Vl*COS(DELTAI)-Q3*V3*COS(DELTA3)- Q4 *V4 *COS(DELTA4)) /((Al +A2) *16.1) +FRICTION LOSSES UPSTREAM: MANNING'S N = .01300; FRICTION SLOPE _ .16307 DOWNSTREAM: MANNING'S N = .01300; FRICTION SLOPE _ .10645 AVERAGED FRICTION SLOPE IN JUNCTION ASSUMED AS .13476 JUNCTION LENGTH = 4.00 FEET FRICTION LOSSES = .539 FEET ENTRANCE LOSSES = .000 FEET JUNCTION LOSSES = (DY +HV1 -HV2) +(ENTRANCE LOSSES) JUNCTION LOSSES = ( .863) +( .000) _ .863 ----------------------------------------------------------------------------- NODE 3466.80 : HGL = < 221.878 >;EGL = < 231.074 >;FLOWLINE = < 220.380> ********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 3466.80 TO NODE 3649.20 IS CODE = 1 UPSTREAM NODE 3649.20 ELEVATION = 233.54 (FLOW UNSEALS IN REACH) CALCULATE FRICTION LOSSES(LACFCD): PIPE FLOW = 43.00 CFS PIPE DIAMETER = 18.00 INCHES PIPE LENGTH = 182.40 FEET MANNING'S N = .01300 ___> NORMAL PIPEFLOW IS PRESSURE FLOW ----------------------------------------------------------------------------- NORMAL DEPTH(FT) = 1.50 CRITICAL DEPTH(FT) = 1.50 ----------------------------------------------------------------------------- DOWNSTREAM CONTROL ASSUMED FLOWDEPTH(FT) = 1.50 ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ GRADUALLY VARIED FLOW PROFILE COMPUTED INFORMATION: ----------------------------------------------------------------------------- DISTANCE FROM FLOW DEPTH VELOCITY SPECIFIC PRESSURE+ CONTROL(FT) (FT) (FT /SEC) ENERGY(FT) MOMENTUM(POUNDS) .000 1.498 24.327 10.694 2110.30 .000 1.499 24.327 10.694 2110.30 .000 1.499 24.327 10.694 2110.30 .000 1.499 24.327 10.694 2110.30 .000 1.499 24.326 10.694 2110.30 .000 1.499 24.326 10.694 2110.30 .000 1.499 24.326 10.694 2110.30 .001 1.499 24.326 10.694 2110.30 .001 1.499 24.326 10.694 2110.30 .001 1.499 24.326 10.694 2110.31 .001 1.499 24.326 10.694 2110.31 .001 1.499 24.326 10.694 2110.31 .002 1.499 24.326 10.694 2110.31 .002 1.499 24.326 10.694 2110.32 .002 1.500 24.326 10.694 2110.32 .003 1.500 24.326 10.694 2110.33 .003 1.500 24.326 10.694 2110.33 .004 1.500 24.326 10.694 2110.33 .004 1.500 24.326 10.694 2110.34 .005 1.500 24.325 10.694 2110.35 .006 1.500 24.325 10.694 2110.35 FLOW IS UNDER PRESSURE 182.400 18.904 24.333 28.099 4029.54 ----------------------------------------------------------------------------- NODE 3649.20 : HGL = < 252.444 >;EGL = < 261.638 >;FLOWLINE = < 233.540> FLOW PROCESS FROM NODE 3649.20 TO NODE 3653.20 IS CODE = 5 UPSTREAM NODE 3653.20 ELEVATION = 233.87 (FLOW IS UNDER PRESSURE) ----------------------------------------------------------------------------- CALCULATE JUNCTION LOSSES: PIPE FLOW DIAMETER ANGLE FLOWLINE CRITICAL VELOCITY (CFS) (INCHES) (DEGREES) ELEVATION DEPTH(FT.) (FT /SEC) UPSTREAM 34.00 18.00 10.00 233.87 1.50 19.240 DOWNSTREAM 43.00 18.00 - 233.54 1.50 24.333 LATERAL #1 9.00 18.00 90.00 233.87 1.16 5.093 LATERAL #2 .00 .00 .00 .00 .00 .000 Q5 .00 = = =Q5 EQUALS BASIN INPUT = == LACFCD AND OCEMA FLOW JUNCTION FORMULAE USED: DY=(Q2*V2-Q1*Vl*COS(DELTAl)-Q3*V3*COS(DELTA3)- Q4 *V4 *COS(DELTA4)) /((Al +A2) *16.1) +FRICTION LOSSES UPSTREAM: MANNING'S N = .01300; FRICTION SLOPE _ .10476 DOWNSTREAM: MANNING'S N = .01300; FRICTION SLOPE _ .16757 AVERAGED FRICTION SLOPE IN JUNCTION ASSUMED AS .13617 JUNCTION LENGTH = 4.00 FEET - FRICTION LOSSES = .545 FEET ENTRANCE LOSSES = .000 FEET JUNCTION LOSSES = (DY +HV1 -HV2) +(ENTRANCE LOSSES) JUNCTION LOSSES = ( 4.165) +( .000) = 4.165 ------------------------------------------------------------------------------ NODE 3653.20 : HGL = < 260.056 >;EGL = < 265.804 >;FLOWLINE = < 233.870> *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 3653.20 TO NODE 3818.16 IS CODE = 1 UPSTREAM NODE 3818.16 ELEVATION = 246.15 (FLOW IS UNDER PRESSURE) ------------------------------------------------------------------------------ -- CALCULATE FRICTION LOSSES(LACFCD): PIPE FLOW = 34.00 CFS PIPE DIAMETER = 18.00 INCHES PIPE LENGTH = 164.96 FEET MANNING'S N = .01300 SF= (Q /K) * *2 = (( 34.00)/( 105.043)) * *2 = .10477 HF =L *SF = ( 164.96) *( .10477) = 17.282 ------------------------------------------------------------------------------ NODE 3818.16 : HGL = < 277.338 >;EGL = < 283.086 >; FLOWLINE = < 246.150> FLOW PROCESS FROM NODE 3818.16 TO NODE 3818.16 IS CODE = 2 UPSTREAM NODE 3818.16 ELEVATION = 246.15 (FLOW IS UNDER PRESSURE) ----------------------------------------------------------------------------- CALCULATE MANHOLE LOSSES(LACFCD): PIPE FLOW = 34.00 CFS PIPE DIAMETER = 18.00 INCHES FLOW VELOCITY = 19.24 FEET /SEC. VELOCITY HEAD = 5.748 FEET HMN = .05 *(VELOCITY HEAD) _ .05 *( 5.748) _ .287 NODE 3818.16 : HGL = < 277.625 >;EGL = < 283.373 >; FLOWLINE = < 246.150> *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 3818.16 TO NODE 3929.43 IS CODE = 1 UPSTREAM NODE 3929.43 ELEVATION = 257.05 (FLOW IS UNDER PRESSURE) ------------------------------------------------------------------------------ - CALCULATE FRICTION LOSSES(LACFCD): PIPE FLOW = 34.00 CFS PIPE DIAMETER = 18.00 INCHES PIPE LENGTH = 111.27 FEET MANNING'S N = .01300 SF= (Q /K) * *2 = (( 34.00)/( 105.044)) * *2 = .10477 HF =L *SF = ( 111.27) *( .10477) = 11.657 ----------------------------------------------------------------------------- NODE 3929.43 : HGL = < 289.283 >;EGL = < 295.031 >; FLOWLINE = < 257.050> ********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 3929.43 TO NODE 3933.43 IS CODE = 5 UPSTREAM NODE 3933.43 ELEVATION = 257.38 (FLOW IS UNDER PRESSURE) ----------------------------------------------------------------------------- CALCULATE JUNCTION LOSSES: PIPE FLOW DIAMETER ANGLE FLOWLINE CRITICAL VELOCITY (CFS) (INCHES) (DEGREES) ELEVATION DEPTH(FT.) (FT /SEC) UPSTREAM 31.00 18.00 .00 257.38 1.49 17.542 DOWNSTREAM 34.00 18.00 - 257.05 1.50 19.240 LATERAL #1 3.00 18.00 80.00 257.38 .66 1.698 LATERAL #2 .00 .00 .00 .00 .00 .000 Q5 .00 = = =Q5 EQUALS BASIN INPUT = == LACFCD AND OCEMA FLOW JUNCTION FORMULAE USED: DY=(Q2*V2-Q1*V1*COS(DELTAI)-Q3*V3*COS(DELTA3)- Q4 *V4 *COS(DELTA4)) /((Al +A2) *16.1) +FRICTION LOSSES UPSTREAM: MANNING'S N = .01300; FRICTION SLOPE _ .08709 DOWNSTREAM: MANNING'S N = .01300; FRICTION SLOPE _ .10476 AVERAGED FRICTION SLOPE IN JUNCTION ASSUMED AS .09593 JUNCTION LENGTH = 4.00 FEET FRICTION LOSSES = .384 FEET ENTRANCE LOSSES = .000 FEET JUNCTION LOSSES = (DY +HV1 -HV2) +(ENTRANCE LOSSES) JUNCTION LOSSES = ( 1.338) +( .000) = 1.338 ----------------------------------------------------------------------------- NODE 3933.43 : HGL = < 291.590 >;EGL = < 296.368 >; FLOWLINE = < 257.380> FLOW PROCESS FROM NODE 3933.43 TO NODE 4113.88 IS CODE = 1 UPSTREAM NODE 4113.88 ELEVATION = 274.05 (FLOW IS UNDER PRESSURE) ----------------------------------------------------------------------------- CALCULATE FRICTION LOSSES(LACFCD): PIPE FLOW = 31.00 CFS PIPE DIAMETER = 18.00 INCHES PIPE LENGTH = 180.45 FEET MANNING'S N = .01300 SF= (Q /K) * *2 = (( 31.00)/( 105.043)) * *2 = .08709 HF =L *SF = ( 180.45) *( .08709) = 15.716 ----------------------------------------------------------------------------- NODE 4113.88 : HGL = < 307.306 >;EGL = < 312.084 >; FLOWLINE = < 274.050> *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 4113.88 TO NODE 4117.88 IS CODE = 5 UPSTREAM NODE 4117.88 ELEVATION = 274.38 (FLOW IS UNDER PRESSURE) ------------------------------------------------------------------------------ CALCULATE JUNCTION LOSSES: PIPE FLOW DIAMETER ANGLE FLOWLINE CRITICAL VELOCITY (CFS) (INCHES) (DEGREES) ELEVATION DEPTH(FT.) (FT /SEC) UPSTREAM 17.00 18.00 45.00 274.38 1.44 9.620 DOWNSTREAM 31.00 18.00 - 274.05 1.49 17.542 LATERAL #1 14.00 18.00 45.00 274.38 1.38 7.922 LATERAL #2 .00 .00 .00 .00 .00 .000 Q5 .00 = = =Q5 EQUALS BASIN INPUT = == LACFCD AND OCEMA FLOW JUNCTION FORMULAE USED: DY=(Q2*V2-Ql*V1*COS(DELTAl)-Q3*V3*COS(DELTA3)- Q4 *V4 *COS(DELTA4)) /((Al +A2) *16.1) +FRICTION LOSSES UPSTREAM: MANNING'S N = .01300; FRICTION SLOPE _ .02619 DOWNSTREAM: MANNING'S N = .01300; FRICTION SLOPE _ .08709 AVERAGED FRICTION SLOPE IN JUNCTION ASSUMED AS .05664 JUNCTION LENGTH = 4.00 FEET FRICTION LOSSES = .227 FEET ENTRANCE LOSSES = .000 FEET JUNCTION LOSSES = (DY +HV1 -HV2) +(ENTRANCE LOSSES) JUNCTION LOSSES = ( 3.032) +( .000) = 3.032 ------------------------------------------------------------------------------ NODE 4117.88 : HGL = < 313.679 >;EGL = < 315.116 >; FLOWLINE = < 274.380> ********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** UPSTREAM PIPE FLOW CONTROL DATA: NODE NUMBER = 4117.88 FLOWLINE ELEVATION = 274.38 ASSUMED UPSTREAM CONTROL HGL = 275.82 FOR DOWNSTREAM RUN ANALYSIS ----------------------------------------------------------------------------- END OF GRADUALLY VARIED FLOW ANALYSIS PIPE -FLOW HYDRAULICS COMPUTER PROGRAM PACKAGE (Reference: LACFCD,LACRD, AND OCEMA HYDRAULICS CRITERION) (c) Copyright 1982 -93 Advanced Engineering Software (aes) Ver. 4.6A Release Date: 7/18/93 License ID 1415 Analysis prepared by: NOLTE and ASSOCIATES, Inc. 5469 Kearny Villa Road, Suit 305 San Diego, CA 92123 (619) 278 -9393 FAX No. (619) 278 -4628 * * * * * * * * * * * * * * * * * * * * * * * * ** DESCRIPTION OF STUDY * * * * * * * * * * * * * * * * * * * * * * * * ** * LEUCADIA BLVD * LINE Al 10YR STORM * * ******************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** -- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - FILE NAME: 10LINEAI.DAT TIME /DATE OF STUDY: 16:58 3/29/1996 *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** GRADUALLY VARIED FLOW ANALYSIS FOR PIPE SYSTEM NODAL POINT STATUS TABLE (Note: " *" indicates nodal point data used.) UPSTREAM RUN DOWNSTREAM RUN NODE MODEL PRESSURE PRESSURE+ FLOW PRESSURE+ NUMBER PROCESS HEAD(FT) MOMENTUM(POUNDS) DEPTH(FT) MOMENTUM(POUNDS) 1000.00- 3.97* 500.10 1.29 Dc 218.86 ) FRICTION 1023.58- 4.01* 504.80 1.29 Dc 218.86 ) JUNCTION 1027.58- 4.89* 498.67 .84 96.16 FRICTION 1101.22- 4.42* 446.46 .96 Dc 93.55 CATCH BASIN 1103.22- 4.48* 410.85 .96 Dc 31.34 ----------------------------------------------------------------------------- MAXIMUM NUMBER OF ENERGY BALANCES USED IN EACH PROFILE = 20 ----------------------------------------------------------------------------- NOTE: STEADY FLOW HYDRAULIC HEAD -LOSS COMPUTATIONS BASED ON THE MOST CONSERVATIVE FORMULAE FROM THE CURRENT LACRD,LACFCD, AND OCEMA DESIGN MANUALS. ********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** DOWNSTREAM PIPE FLOW CONTROL DATA: NODE NUMBER = 1000.00 FLOWLINE ELEVATION = 274.38 PIPE FLOW = 11.50 CFS PIPE DIAMETER = 18.00 INCHES ASSUMED DOWNSTREAM CONTROL HGL = 278.350 NODE 1000.00 : HGL = < 278.350 >;EGL = < 279.008 >; FLOWLINE = < 274.380> *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 1000.00 TO NODE 1023.58 IS CODE = 1 UPSTREAM NODE 1023.58 ELEVATION = 274.62 (FLOW IS UNDER PRESSURE) ------------------------------------------------------------------------------ CALCULATE FRICTION LOSSES(LACFCD): PIPE FLOW = 11.50 CFS PIPE DIAMETER = 18.00 INCHES PIPE LENGTH = 23.58 FEET MANNING'S N = .01300 SF= (Q /K) * *2 = (( 11.50)/( 105.043)) * *2 = .01199 HF =L *SF = ( 23.58) *( .01199) = .283 ----------------------------------------------------------------------------- NODE 1023.58 : HGL = < 278.633 >;EGL = < 279.290 >; FLOWLINE = < 274.620> ********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 1023.58 TO NODE 1027.58 IS CODE = 5 UPSTREAM NODE 1027.58 ELEVATION = 274.95 (FLOW IS UNDER PRESSURE) ----------------------------------------------------------------------------- CALCULATE JUNCTION LOSSES: PIPE FLOW DIAMETER ANGLE FLOWLINE CRITICAL VELOCITY (CFS) (INCHES) (DEGREES) ELEVATION DEPTH(FT.) (FT /SEC) UPSTREAM 6.20 18.00 45.00 274.95 .96 3.508 DOWNSTREAM 11.50 18.00 - 274.62 1.29 6.508 LATERAL #1 .00 .00 .00 .00 .00 .000 LATERAL #2 .00 .00 .00 .00 .00 .000 Q5 5.30 = = =Q5 EQUALS BASIN INPUT = == LACFCD AND OCEMA FLOW JUNCTION FORMULAE USED: DY=(Q2*V2-Q1*Vl*COS(DELTAl)-Q3*V3*COS(DELTA3)- Q4 *V4 *COS(DELTA4)) /((Al +A2) *16.1) +FRICTION LOSSES UPSTREAM: MANNING'S N = .01300; FRICTION SLOPE = .00348 DOWNSTREAM: MANNING'S N = .01300; FRICTION SLOPE = .01199 AVERAGED FRICTION SLOPE IN JUNCTION ASSUMED AS .00773 JUNCTION LENGTH = 4.00 FEET FRICTION LOSSES = .031 FEET ENTRANCE LOSSES = .132 FEET JUNCTION LOSSES = (DY +HV1 -HV2) +(ENTRANCE LOSSES) .JUNCTION LOSSES = ( .609) +( .132) = .741 ----------------------------------------------------------------------------- NODE 1027.58 HGL = < 279.840 >;EGL = < 280.031 >; FLOWLINE = < 274.950> FLOW PROCESS FROM NODE 1027.58 TO NODE 1101.22 IS CODE = 1 UPSTREAM NODE 1101.22 ELEVATION = 275.68 (FLOW IS UNDER PRESSURE) ------------------------------------------------------------------------------ CALCULATE FRICTION LOSSES(LACFCD): PIPE FLOW = 6.20 CFS PIPE DIAMETER = 18.00 INCHES PIPE LENGTH = 73.64 FEET MANNING'S N = .01300 SF= (Q /K) * *2 = (( 6.20)/( 105.046)) * *2 = .00348 HF =L *SF = ( 73.64) *( .00348) = .257 ------------------------------------------------------------------------------ NODE 1101.22 : HGL = < 280.097 >;EGL = < 280.288 >; FLOWLINE = < 275.680> *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 1101.22 TO NODE 1103.22 IS CODE = 8 UPSTREAM NODE 1103.22 ELEVATION = 275.85 (FLOW IS UNDER PRESSURE) ------------------------------------------------------------------------------ CALCULATE CATCH BASIN ENTRANCE LOSSES(LACFCD): PIPE FLOW = 6.20 CFS PIPE DIAMETER = 18.00 INCHES FLOW VELOCITY = 3.51 FEET /SEC. VELOCITY HEAD = .191 FEET CATCH BASIN ENERGY LOSS = .2 *(VELOCITY HEAD) = .2 *( .191) = .038 ----------------------------------------------------------------------------- NODE 1103.22 : HGL = < 280.326 >;EGL = < 280.326 >; FLOWLINE = < 275.850> *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** _ UPSTREAM PIPE FLOW CONTROL DATA: NODE NUMBER = 1103.22 FLOWLINE ELEVATION = 275.85 ASSUMED UPSTREAM CONTROL HGL = 276.81 FOR DOWNSTREAM RUN ANALYSIS PIPE -FLOW HYDRAULICS COMPUTER PROGRAM PACKAGE (Reference: LACFCD,LACRD, AND OCEMA HYDRAULICS CRITERION) (c) Copyright 1982 -93 Advanced Engineering Software (aes) Ver. 4.6A Release Date: 7/18/93 License ID 1415 Analysis prepared by: NOLTE and ASSOCIATES, Inc. 5469 Kearny Villa Road, Suit 305 San Diego, CA 92123 (619) 278 -9393 FAX No. (619) 278 -4628 * * * * * * * * * * * * * * * * * * * * * * * * ** DESCRIPTION OF STUDY * * * * * * * * * * * * * * * * * * * * * * * * ** * LEUCADIA BLVD * LINE A2 10 YR STORM * * ******************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** ----------------------------------------------------------------------------- FILE NAME: 10LINEA2.DAT TIME /DATE OF STUDY: 17:43 3/29/1996 *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** GRADUALLY VARIED FLOW ANALYSIS FOR PIPE SYSTEM NODAL POINT STATUS TABLE (Note: " *" indicates nodal point data used.) UPSTREAM RUN DOWNSTREAM RUN NODE MODEL PRESSURE PRESSURE+ FLOW PRESSURE+ NUMBER PROCESS HEAD(FT) MOMENTUM(POUNDS) DEPTH(FT) MOMENTUM(POUNDS) 1000.00- .90 42.62 .47* 42.73 } FRICTION 1059.98- .66 *Dc 36.26 .66 *Dc 36.26 } CATCH BASIN 1061.98- .79* 15.68 .66 Dc 12.89 ----------------------------------------------------------------------------- MAXIMUM NUMBER OF ENERGY BALANCES USED IN EACH PROFILE = 20 ------------------------------------------------------------------------------ NOTE: STEADY FLOW HYDRAULIC HEAD -LOSS COMPUTATIONS BASED ON THE MOST CONSERVATIVE FORMULAE FROM THE CURRENT LACRD,LACFCD, AND OCEMA DESIGN MANUALS. DOWNSTREAM PIPE FLOW CONTROL DATA: NODE NUMBER = 1000.00 FLOWLINE ELEVATION = 257.38 PIPE FLOW = 3.00 CFS PIPE DIAMETER = 18.00 INCHES ASSUMED DOWNSTREAM CONTROL HGL = 258.280 ----------------------------------------------------------------------------- NODE 1000.00 : HGL = < 257.848 >;EGL = < 258.479 >; FLOWLINE = < 257.380> ********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 1000.00 TO NODE 1059.98 IS CODE = 1 UPSTREAM NODE 1059.98 ELEVATION = 258.55 (FLOW IS SUPERCRITICAL) ----------------------------------------------------------------------------- CALCULATE FRICTION LOSSES(LACFCD): PIPE FLOW = 3.00 CFS PIPE DIAMETER = 18.00 INCHES PIPE LENGTH = 59.05 FEET MANNING'S N = .01300 ----------------------------------------------------------------------------- NORMAL DEPTH(FT) = .46 CRITICAL DEPTH(FT) = .66 UPSTREAM CONTROL ASSUMED FLOWDEPTH(FT) _ .66 a GRADUALLY VARIED FLOW PROFILE COMPUTED INFORMATION: ------------------------------------------------------------------------------ DISTANCE FROM FLOW DEPTH VELOCITY SPECIFIC PRESSURE+ CONTROL(FT) (FT) (FT /SEC) ENERGY(FT) MOMENTUM(POUNDS) .000 .658 4.017 .909 36.26 .021 .648 4.099 .909 36.27 .086 .638 4.184 .910 36.31 .201 .628 4.272 .912 36.38 .373 .618 4.364 .914 36.48 .611 .608 4.460 .917 36.62 .922 .598 4.560 .921 36.78 1.321 .588 4.664 .926 36.98 1.820 .578 4.772 .932 37.21 2.440 .568 4.886 .939 37.49 3.204 .558 5.004 .947 37.80 4.144 .548 5.128 .957 38.15 5.302 .538 5.258 .968 38.54 6.740 .528 5.394 .980 38.98 8.546 .518 5.536 .995 39.47 10.857 .508 5.686 1.011 40.00 13.904 .498 5.843 1.029 40.59 18.118 .488 6.008 1.049 41.23 24.468 .478 6.182 1.072 41.94 36.068 .468 6.365 1.098 42.70 59.050 .468 6.370 1.099 42.73 ------------------------------------------------------------------------------ NODE 1059.98 : HGL = < 259.208 >;EGL = < 259.459 >;FLOWLINE = < 258.550> FLOW PROCESS FROM NODE 1059.98 TO NODE 1061.98 IS CODE = 8 UPSTREAM NODE 1061.98 ELEVATION = 258.72 (FLOW IS AT CRITICAL DEPTH) ----------------------------------------------------------------------------- CALCULATE CATCH BASIN ENTRANCE LOSSES(LACFCD): PIPE FLOW = 3.00 CFS PIPE DIAMETER = 18.00 INCHES FLOW VELOCITY = 4.02 FEET /SEC. VELOCITY HEAD = .251 FEET CATCH BASIN ENERGY LOSS = .2 *(VELOCITY HEAD) = .2 *( .251) = .050 ------------------------------------------------------------------------------ NODE 1061.98 : HGL = < 259.509 >;EGL = < 259.509 >;FLOWLINE = < 258.720> *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** UPSTREAM PIPE FLOW CONTROL DATA: NODE NUMBER = 1061.98 FLOWLINE ELEVATION = 258.72 ASSUMED UPSTREAM CONTROL HGL = 259.38 FOR DOWNSTREAM RUN ANALYSIS ----------------------------------------------------------------------------- ----------------------------------------------------------------------------- END OF GRADUALLY VARIED FLOW ANALYSIS *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** PIPE -FLOW HYDRAULICS COMPUTER PROGRAM PACKAGE (Reference: LACFCD,LACRD, AND OCEMA HYDRAULICS CRITERION) (c) Copyright 1982 -93 Advanced Engineering Software (aes) Ver. 4.6A Release Date: 7/18/93 License ID 1415 Analysis prepared by: NOLTE and ASSOCIATES, Inc. 5469 Kearny Villa Road, Suit 305 San Diego, CA 92123 (619) 278 -9393 FAX No. (619) 278 -4628 * * * * * * * * * * * * * * * * * * * * * * * * ** DESCRIPTION OF STUDY * * * * * * * * * * * * * * * * * * * * * * * * ** * LEUCADIA BLVD * LINE A3 10 YR STORM * * ******************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** -- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - FILE NAME: 10LINEA3.DAT TIME /DATE OF STUDY: 17:58 3/29/1996 *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** GRADUALLY VARIED FLOW ANALYSIS FOR PIPE SYSTEM NODAL POINT STATUS TABLE (Note: " *" indicates nodal point data used.) UPSTREAM RUN DOWNSTREAM RUN NODE MODEL PRESSURE PRESSURE+ FLOW PRESSURE+ NUMBER PROCESS HEAD(FT) MOMENTUM(POUNDS) DEPTH(FT) MOMENTUM(POUNDS) 1000.00- 2.32* 197.35 .60 75.18 } FRICTION 1015.93- 1.92* 153.45 .83 Dc 64.92 } JUNCTION 1019.93- 1.84* 119.94 .18 2.02 } FRICTION 1031.95- 1.72* 106.72 .20 Dc 1.95 } CATCH BASIN 1033.95- 1.55* 87.93 .20 Dc .72 ----------------------------------------------------------------------------- MAXIMUM NUMBER OF ENERGY BALANCES USED IN EACH PROFILE = 20 ----------------------------------------------------------------------------- NOTE: STEADY FLOW HYDRAULIC HEAD -LOSS COMPUTATIONS BASED ON THE MOST CONSERVATIVE FORMULAE FROM THE CURRENT LACRD,LACFCD, AND OCEMA DESIGN MANUALS. ********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** DOWNSTREAM PIPE FLOW CONTROL DATA: NODE NUMBER = 1000.00 FLOWLINE ELEVATION = 208.75 PIPE FLOW = 4.70 CFS PIPE DIAMETER = 18.00 INCHES ASSUMED DOWNSTREAM CONTROL HGL = 211.070 NODE 1000.00 : HGL = < 211.070 >;EGL = < 211.180 >;FLOWLINE = < 208.750> *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 1000.00 TO NODE 1015.93 IS CODE = 1 UPSTREAM NODE 1015.93 ELEVATION = 209.18 (FLOW IS UNDER PRESSURE) ------------------------------------------------------------------------------ CALCULATE FRICTION LOSSES(LACFCD): PIPE FLOW = 4.70 CFS PIPE DIAMETER = 18.00 INCHES PIPE LENGTH = 15.93 FEET MANNING'S N = .01300 SF= (Q /K) * *2 = (( 4.70)/( 105.044)) * *2 = .00200 HF =L *SF = ( 15.93) *( .00200) _ .032 ------------------------------------------------------------------------------ NODE 1015.93 : HGL = < 211.102 >;EGL = < 211.212 >; FLOWLINE = < 209.180> ********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 1015.93 TO NODE 1019.93 IS CODE = 5 UPSTREAM NODE 1019.93 ELEVATION = 209.51 (FLOW IS UNDER PRESSURE) ----------------------------------------------------------------------------- CALCULATE JUNCTION LOSSES: PIPE FLOW DIAMETER ANGLE FLOWLINE CRITICAL VELOCITY (CFS) (INCHES) (DEGREES) ELEVATION DEPTH(FT.) (FT /SEC) UPSTREAM .30 18.00 30.00 209.51 .20 .169 DOWNSTREAM 4.70 18.00 - 209.18 .83 2.660 LATERAL #1 .00 .00 .00 .00 .00 .000 LATERAL #2 .00 .00 .00 .00 .00 .000 Q5 4.40 = = =Q5 EQUALS BASIN INPUT = == LACFCD AND OCEMA FLOW JUNCTION FORMULAE USED: DY=(Q2*V2-Ql*V1*COS(DELTAI)-Q3*V3*COS(DELTA3)- Q4 *V4 *COS(DELTA4)) /((Al +A2) *16.1) +FRICTION LOSSES UPSTREAM: MANNING'S N = .01300; FRICTION SLOPE _ .00001 DOWNSTREAM: MANNING'S N = .01300; FRICTION SLOPE _ .00200 AVERAGED FRICTION SLOPE IN JUNCTION ASSUMED AS .00101 JUNCTION LENGTH = 4.00 FEET FRICTION LOSSES = .004 FEET ENTRANCE LOSSES = .022 FEET JUNCTION LOSSES = (DY +HV1 -HV2) +(ENTRANCE LOSSES) JUNCTION LOSSES = ( .114) +( .022) _ .135 ----------------------------------------------------------------------------- NODE 1019.93 : HGL = < 211.347 >;EGL = < 211.347 >; FLOWLINE = < 209.510> FLOW PROCESS FROM NODE 1019.93 TO NODE 1031.95 IS CODE = 1 UPSTREAM NODE 1031.95 ELEVATION = 209.63 (FLOW IS UNDER PRESSURE) ----------------------------------------------------------------------------- CALCULATE FRICTION LOSSES(LACFCD): PIPE FLOW = .30 CFS PIPE DIAMETER = 18.00 INCHES PIPE LENGTH = 12.00 FEET MANNING'S N = .01300 SF= (Q /K) * *2 = (( .30)/( 108.612)) * *2 = .00001 HF =L *SF = ( 12.00) *( .00001) _ .000 ------------------------------------------------------------------------------ NODE 1031.95 : HGL = < 211.347 >;EGL = < 211.347 >; FLOWLINE = < 209.630> *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 1031.95 TO NODE 1033.95 IS CODE = 8 UPSTREAM NODE 1033.95 ELEVATION = 209.80 (FLOW IS UNDER PRESSURE) ------------------------------------------------------------------------------ CALCULATE CATCH BASIN ENTRANCE LOSSES(LACFCD): PIPE FLOW = .30 CFS PIPE DIAMETER = 18.00 INCHES FLOW VELOCITY = .17 FEET /SEC. VELOCITY HEAD = .000 FEET CATCH BASIN ENERGY LOSS = .2 *(VELOCITY HEAD) _ .2 *( .000) _ .000 ----------------------------------------------------------------------------- NODE 1033.95 : HGL = < 211.347 >;EGL = < 211.347 >; FLOWLINE = < 209.800> *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** UPSTREAM PIPE FLOW CONTROL DATA: NODE NUMBER = 1033.95 FLOWLINE ELEVATION = 209.80 ASSUMED UPSTREAM CONTROL HGL = 210.00 FOR DOWNSTREAM RUN ANALYSIS *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** PIPE -FLOW HYDRAULICS COMPUTER PROGRAM PACKAGE (Reference: LACFCD,LACRD, AND OCEMA HYDRAULICS CRITERION) (c) Copyright 1982 -93 Advanced Engineering Software (aes) Ver. 4.6A Release Date: 7/18/93 License ID 1415 Analysis prepared by: NOLTE and ASSOCIATES, Inc. 5469 Kearny Villa Road, Suit 305 San Diego, CA 92123 (619) 278 -9393 FAX No. (619) 278 -4628 * * * * * * * * * * * * * * * * * * * * * * * * ** DESCRIPTION OF STUDY * * * * * * * * * * * * * * * * * * * * * * * * ** * LEUCADIA BLVD * LINE A4 10 YR STORM * ******************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** -- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - FILE NAME: 10LINEA4.DAT TIME /DATE OF STUDY: 18:28 3/29/1996 *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** GRADUALLY VARIED FLOW ANALYSIS FOR PIPE SYSTEM NODAL POINT STATUS TABLE (Note: " *" indicates nodal point data used.) UPSTREAM RUN DOWNSTREAM RUN NODE MODEL PRESSURE PRESSURE+ FLOW PRESSURE+ NUMBER PROCESS HEAD(FT) MOMENTUM(POUNDS) DEPTH(FT) MOMENTUM(POUNDS) 1000.00- 2.69* 323.59 .66 273.24 } FRICTION } HYDRAULIC JUMP 1099.69- 1.22 *Dc 179.35 1.22 *Dc 179.35 } JUNCTION 1103.69- 2.12* 243.85 1.09 160.81 } FRICTION 1147.65- 2.02* 232.52 1.17 Dc 159.65 } CATCH BASIN 1149.65- 2.35* 176.64 1.17 Dc 48.99 ----------------------------------------------------------------------------- MAXIMUM NUMBER OF ENERGY BALANCES USED IN EACH PROFILE = 20 ----------------------------------------------------------------------------- NOTE: STEADY FLOW HYDRAULIC HEAD -LOSS COMPUTATIONS BASED ON THE MOST CONSERVATIVE FORMULAE FROM THE CURRENT LACRD,LACFCD, AND OCEMA DESIGN MANUALS. ********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** DOWNSTREAM PIPE FLOW CONTROL DATA: NODE NUMBER = 1000.00 FLOWLINE ELEVATION = 196.00 PIPE FLOW = 10.00 CFS PIPE DIAMETER = 18.00 INCHES ASSUMED DOWNSTREAM CONTROL HGL = 198.690 ------------------------------------------------------------------------------ NODE 1000.00 : HGL = < 198.690 >;EGL = < 199.187 >;FLOWLINE = < 196.000> *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** __ FLOW PROCESS FROM NODE 1000.00 TO NODE 1099.69 IS CODE = 1 UPSTREAM NODE 1099.69 ELEVATION = 202.73 (HYDRAULIC JUMP OCCURS) ------------------------------------------------------------------------------ CALCULATE FRICTION LOSSES(LACFCD): PIPE FLOW = 10.00 CFS PIPE DIAMETER = 18.00 INCHES PIPE LENGTH = 99.69 FEET MANNING'S N = .01300 ------------------------------------------------------------------------------ HYDRAULIC JUMP: DOWNSTREAM RUN ANALYSIS RESULTS ----------------------------------------------------------------------------- NORMAL DEPTH(FT) _ .63 CRITICAL DEPTH(FT) = 1.22 UPSTREAM CONTROL ASSUMED FLOWDEPTH(FT) = 1.22 ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ GRADUALLY VARIED FLOW PROFILE COMPUTED INFORMATION: ----------------------------------------------------------------------- - - - - -- DISTANCE FROM FLOW DEPTH VELOCITY SPECIFIC PRESSURE+ CONTROL(FT) (FT) (FT /SEC) ENERGY(FT) MOMENTUM(POUNDS) .000 1.219 6.501 1.875 179.35 .028 1.189 6.653 1.877 179.50 .118 1.160 6.819 1.882 179.98 .277 1.130 6.999 1.891 180.80 .515 1.101 7.194 1.905 181.98 .844 1.071 7.404 1.923 183.54 1.280 1.042 7.633 1.947 185.52 1.841 1.012 7.881 1.977 187.95 2.552 .983 8.149 2.014 190.85 3.441 .953 8.441 2.060 194.29 4.550 .924 8.758 2.115 198.29 5.932 .894 9.103 2.181 202.91 7.658 .864 9.479 2.261 208.23 9.832 .835 9.891 2.355 214.31 12.606 .805 10.342 2.467 221.23 16.215 .776 10.838 2.601 229.10 21.059 .746 11.385 2.760 238.04 27.885 .717 11.989 2.950 248.18 38.381 .687 12.660 3.178 259.69 57.961 .658 13.408 3.451 272.78 99.690 .657 13.434 3.461 273.24 ----------------------------------------------------------------------------- HYDRAULIC JUMP: UPSTREAM RUN ANALYSIS RESULTS DOWNSTREAM CONTROL ASSUMED PRESSURE HEAD(FT) = 2.69 ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ PRESSURE FLOW PROFILE COMPUTED INFORMATION: ----------------------------------------------------------------------------- DISTANCE FROM PRESSURE VELOCITY SPECIFIC PRESSURE+ CONTROL(FT) HEAD(FT) (FT /SEC) ENERGY(FT) MOMENTUM(POUNDS) .000 2.690 5.659 3.187 323.59 20.361 1.500 5.659 1.997 192.36 ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ _ASSUMED DOWNSTREAM ----------------------------------------------------------------------------- PRESSURE HEAD(FT) = 1.50 ----------------------------------------------------------------------------- GRADUALLY VARIED FLOW PROFILE COMPUTED INFORMATION: ------------------------------------------------------------------------------ DISTANCE FROM FLOW DEPTH VELOCITY SPECIFIC PRESSURE+ CONTROL(FT) (FT) (FT /SEC) ENERGY(FT) MOMENTUM(POUNDS) 20.361 1.500 5.657 1.997 192.36 20.574 1.486 5.666 1.985 190.98 20.764 1.472 5.682 1.973 189.75 20.940 1.458 5.702 1.963 188.60 21.103 1.444 5.727 1.953 187.55 21.255 1.430 5.755 1.944 186.56 21.397 1.416 5.786 1.936 185.64 21.530 1.402 5.820 1.928 184.79 21.654 1.388 5.857 1.920 184.00 21.769 1.373 5.896 1.914 183.27 21.875 1.359 5.938 1.907 182.60 21.972 1.345 5.983 1.901 182.00 22.061 1.331 6.030 1.896 181.45 22.140 1.317 6.080 1.892 180.97 22.210 1.303 6.132 1.887 180.54 22.270 1.289 6.187 1.884 180.18 22.320 1.275 6.244 1.881 179.89 22.360 1.261 6.305 1.879 179.65 22.389 1.247 6.367 1.877 179.48 22.407 1.233 6.433 1.876 179.38 22.413 1.219 6.501 1.875 179.35 99.690 1.219 6.501 1.875 179.35 ---------------- - - - - -- -END OF HYDRAULIC JUMP ANALYSIS ------------------------ PRESSURE +MOMENTUM BALANCE OCCURS AT 7.83 FEET UPSTREAM OF NODE 1000.00 DOWNSTREAM DEPTH = 2.233 FEET, UPSTREAM CONJUGATE DEPTH = .657 FEET ----------------------------------------------------------------------------- NODE 1099.69 : HGL = < 203.949 >;EGL = < 204.605 >; FLOWLINE = < 202.730> FLOW PROCESS FROM NODE 1099.69 TO NODE 1103.69 IS CODE = 5 UPSTREAM NODE 1103.69 ELEVATION = 203.06 (FLOW IS AT CRITICAL DEPTH) ----------------------------------------------------------------------------- CALCULATE JUNCTION LOSSES: PIPE FLOW DIAMETER ANGLE FLOWLINE CRITICAL VELOCITY (CFS) (INCHES) (DEGREES) ELEVATION DEPTH(FT.) (FT /SEC) UPSTREAM 9.20 18.00 80.00 203.06 1.17 5.206 DOWNSTREAM 10.00 18.00 - 202.73 1.22 6.503 LATERAL #1 .00 .00 .00 .00 .00 .000 LATERAL #2 .00 .00 .00 .00 .00 .000 Q5 .80 = = =Q5 EQUALS BASIN INPUT = == LACFCD AND OCEMA FLOW JUNCTION FORMULAE USED: DY=(Q2*V2-Ql*Vl*COS(DELTAl)-Q3*V3*COS(DELTA3)- Q4 *V4 *COS(DELTA4)) /((Al +A2) *16.1) +FRICTION LOSSES - UPSTREAM: MANNING'S N = .01300; FRICTION SLOPE _ .00767 DOWNSTREAM: MANNING'S N = .01300; FRICTION SLOPE _ .00921 AVERAGED FRICTION SLOPE IN JUNCTION ASSUMED AS .00844 JUNCTION LENGTH = 4.00 FEET FRICTION LOSSES = .034 FEET ENTRANCE LOSSES = .131 FEET JUNCTION LOSSES = (DY +HV1 -HV2) +(ENTRANCE LOSSES) JUNCTION LOSSES = ( .864) +( .131) _ .995 _ ---------------------------------------------------------------------------- NODE 1103.69 : HGL = < 205.180 >;EGL = < 205.601 >; FLOWLINE = < 203.060> *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 1103.69 TO NODE 1147.65 IS CODE = 1 UPSTREAM NODE 1147.65 ELEVATION = 203.50 (FLOW IS UNDER PRESSURE) ------------------------------------------------------------------------------ CALCULATE FRICTION LOSSES(LACFCD): PIPE FLOW = 9.20 CFS PIPE DIAMETER = 18.00 INCHES PIPE LENGTH = 43.96 FEET MANNING'S N = .01300 SF= (Q /K) * *2 = (( 9.20)/( 105.044)) * *2 = .00767 HF =L *SF = ( 43.96) *( .00767) _ .337 ------------------------------------------------------------------------------ _NODE 1147.65 : HGL = < 205.517 >;EGL = < 205.938 >; FLOWLINE = < 203.500> FLOW PROCESS FROM NODE 1147.65 TO NODE 1149.65 IS CODE = 8 UPSTREAM NODE 1149.65 ELEVATION = 203.67 (FLOW IS UNDER PRESSURE) ------------------------------------------------------------------------------ CALCULATE CATCH BASIN ENTRANCE LOSSES(LACFCD): PIPE FLOW = 9.20 CFS PIPE DIAMETER = 18.00 INCHES FLOW VELOCITY = 5.21 FEET /SEC. VELOCITY HEAD = .421 FEET CATCH BASIN ENERGY LOSS = .2 *(VELOCITY HEAD) _ .2 *( .421) _ .084 ----------------------------------------------------------------------------- NODE 1149.65 : HGL = < 206.022 >;EGL = < 206.022 >; FLOWLINE = < 203.670> ********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** UPSTREAM PIPE FLOW CONTROL DATA: NODE NUMBER = 1149.65 FLOWLINE ELEVATION = 203.67 ASSUMED UPSTREAM CONTROL HGL = 204.84 FOR DOWNSTREAM RUN ANALYSIS ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ END OF GRADUALLY VARIED FLOW ANALYSIS *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** PIPE -FLOW HYDRAULICS COMPUTER PROGRAM PACKAGE (Reference: LACFCD,LACRD, AND OCEMA HYDRAULICS CRITERION) (c) Copyright 1982 -93 Advanced Engineering Software (aes) Ver. 4.6A Release Date: 7/18/93 License ID 1415 Analysis prepared by: NOLTE and ASSOCIATES, Inc. 5469 Kearny Villa Road, Suit 305 San Diego, CA 92123 (619) 278 -9393 FAX No. (619) 278 -4628 * * * * * * * * * * * * * * * * * * * * * * * * ** DESCRIPTION OF STUDY * * * * * * * * * * * * * * * * * * * * * * * * ** * LEUCADIA BLVD * LIONE A5 10 YR STORM * * ******************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** -- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - FILE NAME: 10LINEA5.DAT TIME /DATE OF STUDY: 18:33 3/29/1996 *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** GRADUALLY VARIED FLOW ANALYSIS FOR PIPE SYSTEM NODAL POINT STATUS TABLE (Note: " *" indicates nodal point data used.) UPSTREAM RUN DOWNSTREAM RUN NODE MODEL PRESSURE PRESSURE+ FLOW PRESSURE+ NUMBER PROCESS HEAD(FT) MOMENTUM(POUNDS) DEPTH(FT) MOMENTUM(POUNDS) 972.25- .84 41.18 .43* 49.15 } FRICTION 998.25- .67 Dc 37.82 .35* 62.14 } FRICTION 1037.55- .67 *Dc 37.82 .67 *Dc 37.82 } CATCH BASIN 1039.55- .81* 16.42 .67 Dc 13.43 ------------------------------------------------------------------------------ MAXIMUM NUMBER OF ENERGY BALANCES USED IN EACH PROFILE = 20 ------------------------------------------------------------------------------ NOTE: STEADY FLOW HYDRAULIC HEAD -LOSS COMPUTATIONS BASED ON THE MOST CONSERVATIVE FORMULAE FROM THE CURRENT LACRD,LACFCD, AND OCEMA DESIGN MANUALS. *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** DOWNSTREAM PIPE FLOW CONTROL DATA: NODE NUMBER = 972.25 FLOWLINE ELEVATION = 194.67 PIPE FLOW = 3.10 CFS PIPE DIAMETER = 18.00 INCHES ASSUMED DOWNSTREAM CONTROL HGL = 195.510 ----------------------------------------------------------------------------- NODE 972.25 : HGL = < 195.100 >;EGL = < 195.953 >; FLOWLINE = < 194.670> ********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 972.25 TO NODE 998.25 IS CODE = 1 UPSTREAM NODE 998.25 ELEVATION = 195.10 (FLOW IS SUPERCRITICAL) _---------------------------------------------------------------------------- CALCULATE FRICTION LOSSES(LACFCD): PIPE FLOW = 3.10 CFS PIPE DIAMETER = 18.00 INCHES PIPE LENGTH = 25.50 FEET MANNING'S N = .01300 ----------------------------------------------------------------------------- NORMAL DEPTH(FT) _ .49 CRITICAL DEPTH(FT) _ .67 UPSTREAM CONTROL ASSUMED FLOWDEPTH(FT) _ .35 GRADUALLY VARIED FLOW PROFILE COMPUTED INFORMATION: ----------------------------------------------------------------------------- DISTANCE FROM FLOW DEPTH VELOCITY SPECIFIC PRESSURE+ CONTROL(FT) (FT) (FT /SEC) ENERGY(FT) MOMENTUM(POUNDS) .000 .350 9.874 1.865 62.14 1.761 .357 9.609 1.792 60.69 3.570 .364 9.357 1.724 59.31 5.432 .371 9.115 1.662 58.00 7.355 .378 8.885 1.604 56.76 9.346 .384 8.665 1.551 55.59 11.416 .391 8.454 1.502 54.48 13.577 .398 8.252 1.456 53.42 15.843 .405 8.059 1.414 52.42 18.233 .411 7.873 1.375 51.47 20.773 .418 7.695 1.338 50.57 23.493 .425 7.524 1.305 49.71 25.500 .430 7.411 1.283 49.15 ------------------------------------------------------------------------------ NODE 998.25 : HGL = < 195.450 >;EGL = < 196.965 >;FLOWLINE = < 195.100> " FLOW PROCESS FROM NODE 998.25 TO NODE 1037.55 IS CODE = 1 UPSTREAM NODE 1037.55 ELEVATION = 198.00 (FLOW IS SUPERCRITICAL) ------------------------------------------------------------------------------ CALCULATE FRICTION LOSSES(LACFCD): PIPE FLOW = 3.10 CFS PIPE DIAMETER = 18.00 INCHES PIPE LENGTH = 39.30 FEET MANNING'S N = .01300 ------------------------------------------------------------------------------ NORMAL DEPTH(FT) _ .33 CRITICAL DEPTH(FT) _ .67 UPSTREAM CONTROL ASSUMED FLOWDEPTH(FT) _ .67 GRADUALLY VARIED FLOW PROFILE COMPUTED INFORMATION: ------------------------------------------------------------------------------ DISTANCE FROM FLOW DEPTH VELOCITY SPECIFIC PRESSURE+ CONTROL(FT) (FT) (FT /SEC) ENERGY(FT) MOMENTUM(POUNDS) .000 .670 4.059 .926 37.82 .012 .653 4.196 .927 37.86 .052 .636 4.343 .929 37.98 .122 .619 4.500 .934 38.19 .229 .603 4.668 .941 38.49 .378 .586 4.848 .951 38.89 .577 .569 5.041 .964 39.39 .835 .552 5.249 .980 40.01 1.163 .535 5.474 1.001 40.75 1.578 .519 5.717 1.026 41.63 2.098 .502 5.980 1.057 42.66 2.750 .485 6.266 1.095 43.85 3.569 .468 6.578 1.141 45.22 4.606 .451 6.920 1.195 46.79 5.936 .435 7.294 1.261 48.58 7.674 .418 7.706 1.341 50.62 10.016 .401 8.162 1.436 52.95 13.331 .384 8.668 1.552 55.60 18.445 .367 9.231 1.692 58.63 28.020 .351 9.863 1.862 62.08 39.300 .350 9.874 1.865 62.14 ------------------------------------------------------------------------------ NODE 1037.55 : HGL = < 198.670 >;EGL = < 198.926 >; FLOWLINE = < 198.000> *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 1037.55 TO NODE 1039.55 IS CODE = 8 UPSTREAM NODE 1039.55 ELEVATION = 198.17 (FLOW IS AT CRITICAL DEPTH) ------------------------------------------------------------------------------ CALCULATE CATCH BASIN ENTRANCE LOSSES(LACFCD): PIPE FLOW = 3.10 CFS PIPE DIAMETER = 18.00 INCHES FLOW VELOCITY = 4.06 FEET /SEC. VELOCITY HEAD = .256 FEET CATCH BASIN ENERGY LOSS = .2 *(VELOCITY HEAD) = .2 *( .256) = .051 NODE 1039.55 : HGL = < 198.977 >;EGL = < 198.977 >; FLOWLINE = < 198.170> UPSTREAM PIPE FLOW CONTROL DATA: NODE NUMBER = 1039.55 FLOWLINE ELEVATION = 198.17 ASSUMED UPSTREAM CONTROL HGL = 198.84 FOR DOWNSTREAM RUN ANALYSIS ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ END OF GRADUALLY VARIED FLOW ANALYSIS 14?7 Drainoae Unit No. 24 Morin SCOW: 1' • 40 �lliX Cirri z4', 7,c r� x Ar,p C/� /craao:r 'r4p aK Droinaoe Unit No. 18 ,Lt Jjrc*rll //ff$r I 4 SJ�.*LPCI'� --NT icu /cic /z',x CaP Kam. d - 06 e.( tar, .4O/fOdcb- .00'wRY mace Unit No. 22 e 4.400 D/fch /'Oe)g /•gctp ////1111''''J/J.J wif�f r �JYvccrNil1A"J V" l.tf/ ar %L-t Di /cif Lis1J nit No• 23 170 .go unit No. 16 Drainage Unit No 14 "Wi&Scelo: 1' • 'SO• Ar 5p� O4/ 190 170 I 160 150 l�,x•,tr� tr. Unit No. 13 170 160 1_� 160 1s0 140 /17'PI 130 itf'/ -TOE I. vxz 4 049 ,wj:�sw- 1E DETAILS PROFILES d SAeet 2 of S a *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** PIPE -FLOW HYDRAULICS COMPUTER PROGRAM PACKAGE (Reference: LACFCD,LACRD, AND OCEMA HYDRAULICS CRITERION) (c) Copyright 1982 -93 Advanced Engineering Software (aes) Ver. 4.6A Release Date: 7/18/93 License ID 1415 Analysis prepared by: NOLTE and ASSOCIATES, Inc. 5469 Kearny Villa Road, Suit 305 San Diego, CA 92123 (619) 278 -9393 FAX No. (619) 278 -4628 * * * * * * * * * * * * * * * * * * * * * * * * ** DESCRIPTION OF STUDY * * * * * * * * * * * * * * * * * * * * * * * * ** _* LEUCADIA BLVD * LINE B AND CALTRANS DRAINAGE UNIT NO. 15 * ioo YR sToer� ******************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** -- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - FILE NAME: SDLINEB.DAT TIME /DATE OF STUDY: 13:16 3/22/1996 *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** GRADUALLY VARIED FLOW ANALYSIS FOR PIPE SYSTEM NODAL POINT STATUS TABLE (Note: " *" indicates nodal point data used.) UPSTREAM RUN DOWNSTREAM RUN NODE MODEL PRESSURE PRESSURE+ FLOW PRESSURE+ NUMBER PROCESS HEAD(FT) MOMENTUM(POUNDS) DEPTH(FT) MOMENTUM(POUNDS) 1000.00- 2.00 442.77 .78* 706.10 } FRICTION 1208.00- 1.61 Dc 409.87 1.36* 426.08 } JUNCTION 1212.00- 1.96 402.15 1.08* 438.25 } FRICTION 1228.00- 1.55 *Dc 370.52 1.55 *Dc 370.52 - } JUNCTION 1232.00- 2.71* 460.72 1.16 268.22 } FRICTION 1340.00- 2.06* 333.60 1.36 Dc 259.08 } JUNCTION 1344.00- 2.02* 219.20 1.03 144.91 } FRICTION 1437.04- 1.70* 183.82 1.13 Dc 143.15 } CATCH BASIN 1441.04- 2.13* 152.13 1.13 Dc 45.02 ----------------------------------------------------------------------------- MAXIMUM NUMBER OF ENERGY BALANCES USED IN EACH PROFILE = 20 ------------------------------------------------------------------------------ NOTE: STEADY FLOW HYDRAULIC HEAD -LOSS COMPUTATIONS BASED ON THE MOST CONSERVATIVE FORMULAE FROM THE CURRENT LACRD,LACFCD, AND OCEMA DESIGN MANUALS. *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** DOWNSTREAM PIPE FLOW CONTROL DATA: NODE NUMBER = 1000.00 FLOWLINE ELEVATION = 146.50 PIPE FLOW = 20.00 CFS PIPE DIAMETER = 24.00 INCHES ASSUMED DOWNSTREAM CONTROL HGL = 148.500 ----------------------------------------------------------------------------- NODE 1000.00 : HGL = < 147.280 >;EGL = < 152.103 >;FLOWLINE = < 146.500> ********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 1000.00 TO NODE 1208.00 IS CODE = 1 UPSTREAM NODE 1208.00 ELEVATION = 164.45 (FLOW IS SUPERCRITICAL) ----------------------------------------------------------------------------- CALCULATE FRICTION LOSSES(LACFCD): PIPE FLOW = 20.00 CFS PIPE DIAMETER = 24.00 INCHES PIPE LENGTH = 208.00 FEET MANNING'S N = .01300 ----------------------------------------------------------------------------- NORMAL DEPTH(FT) _ .75 CRITICAL DEPTH(FT) = 1.61 UPSTREAM CONTROL ASSUMED FLOWDEPTH(FT) = 1.36 ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ GRADUALLY VARIED FLOW PROFILE COMPUTED INFORMATION: ----------------------------------------------------------------------------- DISTANCE FROM FLOW DEPTH VELOCITY SPECIFIC PRESSURE+ CONTROL(FT) (FT) (FT /SEC) ENERGY(FT) MOMENTUM(POUNDS) .000 1.357 8.813 2.563 426.08 .441 1.326 9.039 2.596 430.63 .967 1.296 9.280 2.634 435.86 1.589 1.266 9.537 2.679 441.80 2.323 1.236 9.810 2.731 448.51 3.184 1.206 10.103 2.791 456.05 4.196 1.175 10.415 2.861 464.48 5.383 1.145 10.749 2.940 473.87 6.779 1.115 11.106 3.032 484.28 8.426 1.085 11.490 3.136 495.83 10.378 1.055 11.903 3.256 508.59 12.708 1.024 12.346 3.393 522.68 15.515 .994 12.825 3.550 538.24 18.936 .964 13.342 3.730 555.40 23.178 .934 13.902 3.936 574.34 28.558 .903 14.509 4.174 595.24 35.611 .873 15.170 4.449 618.33 45.341 .843 15.892 4.767 643.87 60.010 .813 16.681 5.136 672.15 86.872 .783 17.547 5.567 703.53 208.000 .780 17.618 5.603 706.10 ----------------------------------------------------------------------------- NODE 1208.00 : HGL = < 165.807 >;EGL = < 167.013 >;FLOWLINE = < 164.450> FLOW PROCESS FROM NODE 1208.00 TO NODE 1212.00 IS CODE = 5 UPSTREAM NODE 1212.00 ELEVATION = 165.00 (FLOW IS SUPERCRITICAL) ----------------------------------------------------------------------------- CALCULATE JUNCTION LOSSES: PIPE FLOW DIAMETER ANGLE FLOWLINE CRITICAL VELOCITY (CFS) (INCHES) (DEGREES) ELEVATION DEPTH(FT.) (FT /SEC) UPSTREAM 18.60 24.00 15.00 165.00 1.55 10.785 DOWNSTREAM 20.00 24.00 - 164.45 1.61 8.815 LATERAL #1 .00 .00 .00 .00 .00 .000 LATERAL #2 .00 .00 .00 .00 .00 .000 Q5 1.40 = = =Q5 EQUALS BASIN INPUT = == LACFCD AND OCEMA FLOW JUNCTION FORMULAE USED: DY=(Q2*V2-Ql*Vl*COS(DELTAl)-Q3*V3*COS(DELTA3)- Q4 *V4 *COS(DELTA4)) /((A1 +A2) *16.1) +FRICTION LOSSES UPSTREAM: MANNING'S N = .01300; FRICTION SLOPE = .02111 DOWNSTREAM: MANNING'S N = .01300; FRICTION SLOPE = .01213 AVERAGED FRICTION SLOPE IN JUNCTION ASSUMED AS .01662 JUNCTION LENGTH = 4.00 FEET FRICTION LOSSES = .066 FEET ENTRANCE LOSSES = .241 FEET JUNCTION LOSSES = (DY +HV1 -HV2) +(ENTRANCE LOSSES) JUNCTION LOSSES = ( .628) +( .241) = .870 ----------------------------------------------------------------------------- NODE 1212.00 : HGL = < 166.077 >;EGL = < 167.883 >; FLOWLINE = < 165.000> FLOW PROCESS FROM NODE 1212.00 TO NODE 1228.00 IS CODE = 1 UPSTREAM NODE 1228.00 ELEVATION = 165.80 (FLOW IS SUPERCRITICAL) ----------------------------------------------------------------------------- CALCULATE FRICTION LOSSES(LACFCD): PIPE FLOW = 18.60 CFS PIPE DIAMETER = 24.00 INCHES PIPE LENGTH = 16.00 FEET MANNING'S N = .01300 ----------------------------------------------------------------------------- NORMAL DEPTH(FT) _ .84 CRITICAL DEPTH(FT) = 1.55 UPSTREAM CONTROL ASSUMED FLOWDEPTH(FT) = 1.55 GRADUALLY VARIED FLOW PROFILE COMPUTED INFORMATION: ------------------------------------------------------------------------------ DISTANCE FROM FLOW DEPTH VELOCITY SPECIFIC PRESSURE+ CONTROL(FT) (FT) (FT /SEC) ENERGY(FT) MOMENTUM(POUNDS) .000 1.552 7.107 2.337 370.52 .042 1.517 7.274 2.339 370.80 .176 1.481 7.454 2.344 371.68 .413 1.445 7.648 2.354 373.19 .769 1.410 7.856 2.369 375.36 1.261 1.374 8.08 "0 2.389 378.24 1.913 1.338 8.321 2.414 381.88 2.752 1.303 8.581 2.447 386.34 3.813 1.267 8.860 2.487 391.67 5.141 1.232 9.161 2.536 397.94 6.794 1.196 9.487 2.594 405.24 8.850 1.160 9.839 2.664 413.66 11.414 1.125 10.221 2.748 423.30 14.635 1.089 10.635 2.846 434.27 16.000 1.077 10.781 2.883 438.25 ----------------------------------------------------------------------------- NODE 1228.00 : HGL = < 167.352 >;EGL = < 168.137 >; FLOWLINE = < 165.800> ********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 1228.00 TO NODE 1232.00 IS CODE = 5 UPSTREAM NODE 1232.00 ELEVATION = 166.13 (FLOW IS AT CRITICAL DEPTH) ----------------------------------------------------------------------------- CALCULATE JUNCTION LOSSES: PIPE FLOW DIAMETER ANGLE FLOWLINE CRITICAL VELOCITY (CFS) (INCHES) (DEGREES) ELEVATION DEPTH(FT.) (FT /SEC) UPSTREAM 14.30 24.00 80.00 166.13 1.36 4.552 DOWNSTREAM 18.60 24.00 - 165.80 1.55 7.109 LATERAL #1 .00 .00 .00 .00 .00 .000 LATERAL #2 .00 .00 .00 .00 .00 .000 Q5 4.30 = = =Q5 EQUALS BASIN INPUT = == LACFCD AND OCEMA FLOW JUNCTION FORMULAE USED: DY=(Q2*V2-Ql*V1*COS(DELTAl)-Q3*V3*COS(DELTA3)- Q4 *V4 *COS(DELTA4)) /((A1 +A2) *16.1) +FRICTION LOSSES UPSTREAM: MANNING'S N = .01300; FRICTION SLOPE = 00400 DOWNSTREAM: MANNING'S N = .01300; FRICTION SLOPE = .00753 AVERAGED FRICTION SLOPE IN JUNCTION ASSUMED AS .00576 JUNCTION LENGTH = 4.00 FEET FRICTION LOSSES = .023 FEET ENTRANCE LOSSES = .157 FEET JUNCTION LOSSES = (DY +HV1 -HV2) +(ENTRANCE LOSSES) JUNCTION LOSSES = ( .864) +( .157) = 1.021 ----------------------------------------------------------------------------- NODE 1232.00 : HGL = < 168.837 >;EGL = < 169.158 >;FLOWLINE = < 166.130> ********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 1232.00 TO NODE 1340.00 IS CODE = 1 UPSTREAM NODE 1340.00 ELEVATION = 167.21 (FLOW IS UNDER PRESSURE) ------------------------------------------------------------------------------ CALCULATE FRICTION LOSSES(LACFCD): PIPE FLOW = 14.30 CFS PIPE DIAMETER = 24.00 INCHES PIPE LENGTH = 108.00 FEET MANNING'S N = .01300 SF= (Q /K) * *2 = (( 14.30)/( 226.225)) * *2 = .00400 HF =L *SF = ( 108.00) *( .00400) = .432 ------------------------------------------------------------------------------ NODE 1340.00 : HGL = < 169.268 >;EGL = < 169.590 >;FLOWLINE = < 167.210> *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 1340.00 TO NODE 1344.00 IS CODE = 5 UPSTREAM NODE 1344.00 ELEVATION = 167.71 (FLOW IS UNDER PRESSURE) ------------------------------------------------------------------------------ CALCULATE JUNCTION LOSSES: PIPE FLOW DIAMETER ANGLE FLOWLINE CRITICAL VELOCITY (CFS) (INCHES) (DEGREES) ELEVATION DEPTH(FT.) (FT /SEC) UPSTREAM 8.50 18.00 30.00 167.71 1.13 4.810 DOWNSTREAM 14.30 24.00 - 167.21 1.36 4.552 LATERAL #1 .00 .00 .00 .00 .00 .000 LATERAL #2 .00 .00 .00 .00 .00 .000 Q5 5.80 = = =Q5 EQUALS BASIN INPUT = == LACFCD AND OCEMA FLOW JUNCTION FORMULAE USED: DY=(Q2*V2-Ql*Vl*COS(DELTAl)-Q3*V3*COS(DELTA3)- Q4 *V4 *COS(DELTA4)) /((Al +A2) *16.1) +FRICTION LOSSES UPSTREAM: MANNING'S N = .01300; FRICTION SLOPE = .00655 DOWNSTREAM: MANNING'S N = .01300; FRICTION SLOPE = .00400 AVERAGED FRICTION SLOPE IN JUNCTION ASSUMED AS .00527 JUNCTION LENGTH = 4.00 FEET FRICTION LOSSES = .021 FEET ENTRANCE LOSSES = .064 FEET JUNCTION LOSSES = (DY +HV1- HV2) +(ENTRANCE LOSSES) JUNCTION LOSSES = ( .434) +( .064) = .499 ----------------------------------------------------------------------------- NODE 1344.00 : HGL = < 169.729 >;EGL = < 170.089 >;FLOWLINE = < 167.710> ********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 1344.00 TO NODE 1437.04 IS CODE = 1 UPSTREAM NODE 1437.04 ELEVATION = 168.64 (FLOW IS UNDER PRESSURE) ----------------------------------------------------------------------------- CALCULATE FRICTION LOSSES(LACFCD): PIPE FLOW = 8.50 CFS PIPE DIAMETER = 18.00 INCHES PIPE LENGTH = 93.04 FEET MANNING'S N = .01300 SF= (Q /K) * *2 = (( 8.50)/( 105.044)) * *2 = .00655 HF =L *SF = ( 93.04) *( .00655) = .609 ----------------------------------------------------------------------------- NODE 1437.04 : HGL = < 170.339 >;EGL = < 170.698 >;FLOWLINE = < 168.640> *********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 1437.04 TO NODE 1441.04 IS CODE = 8 UPSTREAM NODE 1441.04 ELEVATION = 168.64 (FLOW IS UNDER PRESSURE) ----------------------------------------------------------------------------- CALCULATE CATCH BASIN ENTRANCE LOSSES(LACFCD): PIPE FLOW = 8.50 CFS PIPE DIAMETER = 18.00 INCHES FLOW VELOCITY = 4.81 FEET /SEC. VELOCITY HEAD = .359 FEET CATCH BASIN ENERGY LOSS = .2 *(VELOCITY HEAD) _ .2 *( .359) _ .072 ----------------------------------------------------------------------------- NODE 1441.04 : HGL = < 170.770 >;EGL = < 170.770 >; FLOWLINE = < 168.640> ********************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** UPSTREAM PIPE FLOW CONTROL DATA: NODE NUMBER = 1441.04 FLOWLINE ELEVATION = 168.64 ASSUMED UPSTREAM CONTROL HGL = 169.77 FOR DOWNSTREAM RUN ANALYSIS END OF GRADUALLY VARIED FLOW ANALYSIS Sheet1 , LEUCADIA BOULEVARD CURB INLET DATA TABLE FN: SD0019 \00 \WIN \CIDATA.XLS j *FLOW REQ. STREET HYDRO. Q100 DEPTH INLET STREET NAME STATION GRADE NODE (cfs) (APP. X -D) LENGTH! REMARKS LEUCADIA BLVD 9 +74.25 1.97% 20.2 8.5 0.40 19.5 21' TYPE "B -1" " 9 +94.25 1.97% 21.2 6.6 0.37 16.1 17' TYPE "B -1" " 129+02.611 5.64% 6.1 6.6 0.32 18 19' TYPE "B -1" " 28+22.071 4.79% 7.1 12.2 0.39 1 28.5 30' TYPE "B -1" " 37 +80 7.24% 1 1.2 10.2 0.35 26 27' TYPE "B -1" " 37 +80 7.24% 2.2 7.1 0.31 19.8 21' TYPE "B -1" SAXONY ROAD 10 +95 SUMP 8.2 13.7 ***0.6 11.4 13' TYPE "B -1" " 10 +85.96 1.39% 9 1.1 0.23 3.7 **13' TYPE "B -1" PASIFLORA AVE. 11 +15 SUMP 4.1 4.4 """'0.6 3.7 TYPE "B" * REQ. INLET LENGTH BASED ON CITY OF SAN DIEGO FORMULA Q= 0.7L(A +Y) ^3/2 WHERE A =0.33' AND Y = DEPTH OF FLOW I ** CURB INLET OVERSIZED IN CASE FLOWS FROM OTHER SIDE OF STREET CROSS OVER *** MAXIMUM PONDING HIEGHT (H) OF 0.6' USED IN SUMP CALCULATIONS Page 1 20— Is- 16 - 14 — 12 — 10 9- 8- 7 — 6 — J - w Q- 0 4— J w 3— w H p 2- 1.8- 0 I.6 14— 1.2 — 1.0— 0.9 — 0.8 — 0.7 — 0.6— 0.5— 04— �+— I.5 ' —� G+- n- • 015 J�Depfh I 0.13 n = 0175 RESIDENTIAL STREET ONE SIDE ONLY I 1 1 2 3 4 5 6 7 8 9 10 20 30 40 50 DISCHARGE (C. F S) EXAMPLE Given: 0 = 10 S = 2.5 Chart gives: Depth = 0.4 , Velocity = 4.4 f. p s. SAN DIEGO COUNTY GUTTEF; AND ROADWAY DEPARTMENT OF SPECIAL DISTRICT SERVICES DISCHARGE- VELOCITY CHART DESIGN MANUAL APPROVED -� /��_�tl�' DATE 1 /•3C�G 9 APPENDIX X -D IV -A- 13 CHART 1 -103.6 A CAPACITY OF CURB OPENING INLETS M ASSUMED 2% CROWN. Q = 0.7L (A +Y) 3/2 *A = 0.33 Y = HEIGHT OF WATER AT CURB FACE (0.4' MAXIMUM) REFER TO CHART 1- 104.12 L = LENGTH OF CLEAR OPENING OF INLET *'Use A =0 when the inlet is adjacent to traffic; i.e., for a Type "J" median inlet or where the parking lane is removed. REV. CITY OF SAN DIEGO - DESIGN GUIDE SHT. NO. CAPACITY OF CURB OPENING INLETS 13 CHART I- 103.6C 1.0 2 10 8 1-� 10 O 6 8 S N 9 V 4 T = 3 8 .. J O T 2 F- W O w v z 1 Z uo z z S 5 O / = S Z = 3 L_ w _ O / J 0 • 4 O x c� O 2 W re > W CL 3 V .08 CL 06 .1• rid J .03 ow le D4 2 .03 it 2 �1 He'lat N cure, Srrtece of _ � I tend" Weeer� -� t� �eeei eeeHee�O� (0) G ELEVATION SECTION —" REV. CITY OF SAN DIEGO - DESIGN GUIDE NOMOGRAM - CAPACITY , CURB � I INLET AT SAG 15 4 3 2 1.5 z W 1.0 a 0 .9 O W .7 x O N .6 W .S Z x CL .4 0 W O Z a .3 .2 .IS FINAL ENVIRONMENTAL IMPACT REPORT ENCINITAS RANCH SPECIFIC PLAN AND LEUCADIA BOULEVARD ALIGNMENT Case No. 92 -098 SP SCH # 93121012 Prepared for: City of Encinitas 505 South Vulcan Avenue Encinitas, California 92024 By: Curtis Scott Englehorn and Associates Post Office Box 458 Cardiff By The Sea, California 92007 March, 1994 REPORT PRINTED ON RECYCLED PAPER PREFACE This final environmental impact report (FEIR) pertains to the Encinitas Ranch Specific Plan and Leucadia Boulevard Alignment. It has been prepared in compliance with the California Environmental Quality Act (CEQA), the California Code of Regulations CEQA Guidelines, and the City of Encinitas CEQA Guidelines. The FEIR consists of three parts. The first part contains comments and responses for the Encinitas Ranch Specific Plan and Leucadia Boulevard Draft Environmental Impact Report (DEIR). The second part is the revised DEIR. The third part is the revised Technical Appendices to the DEIR under separate cover. REVISIONS TO THE DRAFT ENVIRONMENTAL IMPACT REPORT AND TECHNICAL APPENDICES Limited revisions have been made to the DEIR and Technical Appendices. The revisions involve recorded lengths for Leucadia Boulevard alignment segments; recorded direct impacts and mitigation requirements for Diegan coastal sage scrub and southern maritime chaparral; Williamson Act contract status and project compliance with agricultural regulations; and project consistency with the regional Congestion Management Program (CMP). No changes have been made to the project and the revisions do not involve significant new information. Lengths for Leucadia Boulevard alignment segments on figures were incorrectly measured for the project description. The recorded total distance, length for the middle segment, and length of the eastern segment have been changed. These revisions are on page 2 -26 of the DEIR. The changes do not affect the environmental impact analysis in the DEIR. Direct impact acreage for Diegan coastal sage scrub was incorrectly calculated for Specific Plan Land Use Plans A and B. Total direct impact for sage scrub recorded as 33.8 acres (69 %) has been changed to 18.2 acres (37 %). Direct impacts recorded for sub - associations have also been changed accordingly. These revisions are in Table 1.2 on page 1 -10, Table 4 -5 on page 4 -56, and in the text on page 4 -58 of the DEIR. Although the changes represent a reduction in reported direct impacts to sage scrub, they do not affect the determination of significant impact to this sensiti -e vegetation or recommendation to mitigate the impacts. The corresponding recorded total mitigation requirement for sage scrub has been changed from 70.6 acres to 40.4 acres. Breakdown by mitigation ratio has also been changed accordingly. These revisions are in Table 4 -7 on page 4 -62, in text on page 4 -63, and in Table 7 -1 on page 7 -5 of the DEIR. The changes reduce the mitigation requirement for sage scrub by 20.2 acres. Direct impact acreage for Diegan coastal sage scrub and southern maritime chaparral was incorrectly calculated for the Reduced Effects on Sensitive Resources alternative. For Alternative Land Use Plans A and B the recorded percentage reduction in total impacts to sage scrub and chaparral has been changed. These revisions are in text on page 5 -16 of the DEIR. Total direct impact for sage scrub for the Alternative Land Use Plans recorded as 25.1 acres (51 %) [ -8.7 ac] has been changed to 11.2 acres (23 %) [ -7.0 ac]. Direct impacts recorded for sub- associations have also been changed accordingly. Total direct impact for southern maritime chaparral for the Alternative Land Use Plans recorded as 18.5 acres (15 %) [ -15.7 ac] has been changed to 20.6 acres (17 %) [- 13.6 ac]. These revisions are in Table 5 -6 on page 5 -18 and in the text on page 5 -19 of the DEIR. The changes represent a reduction in reported direct impacts to sage scrub, and a slight increase in direct impacts to chaparral. They do not affect the determination of significant impact to these sensitive vegetation communities and recommendation to mitigate. The Reduced Effects on Sensitive Resources alternative remains environmentally superior to the Specific Plan and is recommended for consideration by decisionmakers. The corresponding recorded total mitigation requirement for sage scrub has been changed from 52.1 acres [ -18.5 ac] to 26.4 acres [ -14.0 ac]. Breakdown by mitigation ratio has also been changed accordingly. The recorded total mitigation requirement for southern maritime chaparral has been changed from 47.3 acres [ -29 ac] to 54.1 acres [ -22.2 ac]. Recorded total mitigation requirement for Alternative Land Use Plan A has been changed from 45.6 acres to 52.4 acres. Breakdown by mitigation ratio has also been changed accordingly. These revisions are in Table 5 -8 on page 5 -23 and in text on page 5 -22 of the DEIR. The changes reduce the mitigation requirement for sage scrub by 25.7 acres and increase the requirement for chaparral by 6.8 acres. Revisions to DEIR Appendix D upon which the above changes for biological resources are based are in Tables 4, 6, and 9 and in text on pages 2, 3, 5, 7, 10, 23, 29, 57, 59, 61, 62, 92, 99, 100, 101, and 115. The Williamson Act contract expiration dates for parcels under Encinitas Ranch ownership were incorrectly recorded. These dates have been changed to one year earlier. In addition, a notice of non - renewal was filed in December of 1993 for parcels with Williamson Act contracts reported as active in the November 1993 DEIR. The status of these parcels has been changed to reflect expiration of the contract in the year 2003. The revisions are on Figure 4 -32 on page 1 -141, in Table 4 -15 on page 4 -142, and in text on pages 4 -140 and 4 -153. The date and status changes will not affect the ultimate maximum retirement of agricultural lands in the Ecke Agricultural Preserve. Reported provisions for Williamson Act contract cancellation were outdated. The repealed section of the Act has been deleted and replaced with a description of the current provisions which involve a landowners petition and findings necessary for local government to approve a cancellation. This revision is in text cn pages 4 -144 and 4 -145. An overview of possible actions the City may need to take when it assumes responsibilities of the Act has been added. This revision is in text on page 4 -153. Finally, a summary of determinations made for the loss of productive land and effects on the regional economy in previous subsections has been added to further support the analysis of regulatory compliance. This revision is in text on page 4 -153. All revisions serve to clarify the earlier analysis and do not affect the determinations of compliance. A discussion of the definitional and public policy framework relating to agricultural land and its conversion to other uses, labeled Appendix I, has been added to the DEIR techn_ cal appendices to further clarify the agricultural regulatory compliance analysis in the DEIR. Project consistency with the regional Congestion Management Pror_.•am (CMP) has been clarified by adding an overview of the program and condition_ under which it would apply. The road segment of potential concern is E1 Camino Real between Garden View Road and Mountain Vista Drive. The revision is in text on pages 3 -6, 4 -166, and 4 -170. This revision does not affect the determination of program consistency. COMMENTS AND RESPONSES FOR THE DRAFT ENVIRONMENTAL IMPACT REPORT The DEIR was circulated for public review in excess of 45 days from 3 December 1993 through 18 January 1994. Comments on the DEIR were received in writing from persons listed in the index to follow. A code is assigned to key each person to their comments, and in turn, to each response. Because none of the responses involve important changes in information in the text of the DEIR or Technical Appendices, no revisions have been made to the documents for this purpose. Public participation is essential to the CEQA process and comments received during circulation of the DEIR are appreciated. Public Hearings for the project will be held in the near future and attendance and testimony is encouraged. k3 INDEX OF PERSONS COMMENTING ON THE DRAFT ENVIRONMENTAL IMPACT REPORT CODE PERSON /AGENCY DATE PAGE 1 Michele F.Waltz 29 November 1993 5 South Coast Section Chief Los Angeles District Corp of Engineers Department of the Army 2 Gail C. Kobetich 19 January 1994 7 Field Supervisor Fish and Wildlife Service U.S. Department of the Interior 3 Fred Worthley 13 January 1994 15 Region 5 Regional Manager Department of Fish and Game State of California Resources Agency 4 Bill Dillon 13 January 1994 21 Planning Studies Branch Chief District 11 Planning State of California Department of Transportation 5 Jim Vasquez 11 January 1994 22 District 11 Environmental Analysis Branch A State of California Department of Transportation 6 T.E. Allison 11 January 1994 23 Project Manager District 11 Project Development North State of California Department of Transportation 7 Cid Tesoro 11 January 1994 25 District Hydraulics Engineer District 11 Hydraulics State of California Department of Transportation 8 Debbie Pilas- Treadway 29 December 1993 26 Staff Analyst State of California Native American Heritage Commission 9 Joe Convery 12 January 1994 27 Staff Analyst San Diego Local Agency Formation Commission 10 Lee McEachern 10 January 1994 28 Coastal Planner California Coastal Commission State of California Resources Agency 11 Lauren M. Wasserman 14 January 1994 30 Director Department of Planning and Land Use County of San Diego 12 David Wigginton 7 December 1993 32 Community Services Director City of Encinitas 13 Christer Westman 17 January 1994 33 Associate Planner Planning Department City of Carlsbad k3 14 Mike Poland 9 December 1993 Principal Planner Development Services Department Planning Division City of San Marcos 15 Bob Nelson 17 January 1994 Director of Public Works Victor Graves SDWD Engineering and Planning Supervisor San Dieguito Water District 16 F.D. Fontanesi 14 January 1994 General Services Director OLivenhain Municipal Water District 17 Eric J. Hall 18 January 1994 Adminstrative Services Director San Dieguito Union High School District 18 Dan M. Dunham 9 December 1993 Associate Vice President Strategic Planning 15 January 1994 Community Systems Associates on behalf of Encinitas Union School District 19 Caroline Stable 17 January 1994 QuaiL BotanicaL Gardens Acting Director QuaiL BotanicaL Gardens Foundation 20 Dolores Welty 16 January 1994 Conservation Chair Friends of Batiquitos Lagoon 21 Mark T. Hickner 17 January 1994 Project Manager T &B Planning Consultants 22 Louis E. GobeL 14 January 1994 Law Offices of Louis E. GobeL on behalf of Hinsvark, Franklin, and Watson 23 Joan Herskowitz 14 January 1994 Encinitas California 24 Mike Stewart 13 January 1994 Project Manager Fieldstone La Costa 25 James C. Hirsch 18 January 1994 Senior Director FORMA 26 Julie Fisher 6 January 1994 Encinitas California 4 37 38 41 42 43 57 59 65 68 70 72 73 75 w z O a w w C4 to l LL.I d Lw O Q= w zi 61! �o 23•- a. o01 N g d f�NSC • •bYa]a ' w 4 c U G m 4 w lei o O w v ro -.i O W W 0 tx C v 9 it 0 o ti U bG c m >, ai ..l 4)414)4 >c c a) C aaa 0 c >w0•.i> 00>,p >,4' m41 m al Y•'1M 7Y 4)U a V07 c 11 O 41 V) U ro�0V0 v Uualnw c Q w m0 vw 41 N C 4J Y 0 14 A v c C -. a m .4 C O .1 •. 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Trails and Creek Man • . • Orrr • • • • , Quail Gardens Creek \'• ♦ Y °• `/ Trails • :� • � EociaitasCreek Pedestrian Overpass � • • � . •I• (East Fork) Blue Line CreeW � ••�•••/ '• '• (WOOd:r other ,� ' •� , ! I. MIM'Slre materw) • \• • .•I . • • Tr ads as shown here mean trail. that ue • •.1 sa in a natural or put like satin& • r• • • Trad, that arc nrar road. u. sepuuad ban •, thos. roads by a 15- to 20' vegamd buffer. Cottonwood � j� • ..:...... . Creek • , 1 (Illstortcal) \ YMCA Quad Botanical Gardens • Trails — busy roads should be •at on the Sports Park 1 •• W (6apa.deJ) upwind side of the rod (whey possible) to rduce pdawan caposur• to auto •rrlla.lOnt i ' •• Map 3 Rail-Road , Trails Creeks Transit Station Encinitas (LEI I C Plan) Blvd. (Approvad Plan) nti w •a y b u � � ? o LL q. x otb °F:O • d n 42. e � o n a a 3 0 H a ^ 7 nti Z6 N N N N N O • :N° F H- -in H o C w Gin C) ^ "� w O x OO S 7 A /HSe w LCt C �• '."' A �p O y y m C 2: M < x O N n n O d a �• N A' c. w w A y o aK y O N - G 0. •�, t"o r, n < H �' �► (7 w .w, w_ po8a'w'H C E ;d c 0 4 E _._ x su o`^-o y LF o a= F c; a H P. Gw000 o eL� 'o, do d v_° � f. s c C, co w A a ti o 0. a n o < � a < H00 • o 00 0 c ? o p y O ° -O wN >O 00 O S p ? VC ] . H O 0 _ 0. N A 7 N o o > n co tl0 a0 L.- �°c °a w o w ' . H d n y O �f : N H a w � ry = S y w O 7 2 UO •c » a O » S O O C C y o 0. 0. n c a0 , w 0. w S m ^O t p ° oc w ° 0. cr ^o -o w. o 7< ° 3 C o n G . v a w o < 0 s • o o 3ct � m c w e 7 co ° • �'r co uo- ap _ n o ao c0 s o c w 3 F a 'N77 m 7 a Oa° _ 2° � C ^ S W p ro O 0. y ? O O O CD = w w 7 �• .O. o fl c °C •n M ° » 0 C .'S o ^ n< S 7 o o c w n ^ ?o•owa o c 2. 2 ,O nc_p1�c�w.0 w 00 w N S 0 0 P- w °-= t7 = v c o°' a c °a? c 0 0 ry i7 o H e o w 3 v e UO= 0 s w o a a O w c w o O c O A o N y y p °� Cw 1 o ff et c w• 9 m » c n w O n. a w S= 0 W o amc+ O 0.f_s O < w O � 0 07 o d c 3 ° < 0. �s 0. o T . a 3 n ° c � ti w •v ° d o °c y o f v° o 0=? to 0- ° H xp wo o o 0 yn � w 0 a W m 3 0 o 0 c 7 A O < ^o N H 0 � - C w y. O aOu . Er w n o > o o g F 2 o y o g2 H d o n cw CZ w 3 °; o ry ° O <• ^ d y N. p ^O. H 7 a0 a d O' �� o0 ° O d n �' ^ w 3• w Uo 7. a �e co o c w s o w 0 F S E o c o 33 o p? y w C S y y (o _. O R w x c o H a H �� u o= c 0 00 ?' s a .°n O ,�.. O N N N N N • • :N° • • . n H ^ . ^ . sE, s= o 0 o �o O,o = 4 o A w N 0 n co s o n C �p C fD . 70 0w 0 0 O 0 o O o m - :3 a n a. . ° ° D CV C � ^ 0 °N s o o co O o o o 2' n w CL ao ^' 2< E o O c io it n 0 n a° d n p E o co E p' < m c (� 0.A ry a' d H x T o c ° UO E (i 0 O 0.� O O S d N C. N h' c co co v O d 0 p no 0. a G c O b H o. O N d ry cco �• o w a. p �e G fD ^ d c ry y n R n G. ° oO o W o 3 E o y a. ° UO O ° ,n., = 7s w Lm •N O N CD 0 N. iTl Fr OZ 0 7ry n w O S 7 0 O < O 0. W 7� d N S 0 0 (➢ CL = P- R R a o sv. 0 w A n °' m s tz y. vac• °' .yw.� o awo o w 0 ,moo E nry n.a O p, o.0. y p, w > O w to N v io Er v c a<� =_ ° ti w •v ° o C5 a -0 O m 0 v n N o= d D Er H xp o o °o wo w H H d O < s2 0'N 0 o w O Uo 7. a H o 0 io w D o— ° •v y o y w C S y y (o _. O c •v G1 0 m co H n w 2, o E w ry � O (SD C O w w O c a o H .y O 0 w y 11 I L d C E N N O \ V u I •u o) ie cl 1 < 5 eE U 'l r CE G q _ � W r •� o m� o � <� r � ' Ala r Ly r I 1 I r U y w r n >; W rn-- W /" d y � a b ° •g m 0 N N N Q N • w a r1 ./� C % N 0 rn C w .> w � w t d C y L 95 •. N `o T C7 Q y m �c 3 ZZV O m m ty �Z2 O d. V Q. C N p y U N O L °= N Q o p F n U = n > E WLLJ Lu — wow C7 m LL CO m n ti.. LL m N = d N° U L1J d Cn O C_ L°L U C N C y d 2 V H �. A p t' } N > a n O DOLL. W ° o In J c) cc w o 0 o:3 z m 'o E> Lu Lo LLI a V W 2 6M II �ji;i � .. t Y �o eAmE ZW ni c a v co to o o o E9 n=y ti v ° c v a c° CJ L A `o ° o E d O LL c-om gH )�,.y({p to m 06E d N E m i0 O N g 3 1CO eCa N i J W W W ' •// w o o '� o L o o a> p �e a n m as�12� °:e S Z to to U U to U m 2' N Q LL O ¢ m 2 U O O U m my n c`° e �t °$ a'i?tao�n pp(( lf�l DRAFT ENVIRONMENTAL IMPACT REPORT ENCINITAS RANCH SPECIFIC PLAN AND LEUCADIA BOULEVARD ALIGNMENT Case No. 92 -098 SP SCH # 93121012 Prepared for: City of Encinitas 505 South Vulcan Avenue Encinitas, California 92024 By: Curtis Scott Englehorn and Associates Post Office Box 458 Cardiff By The Sea, California 92007 November, 1993 Revised March, 1994 TABLE OF CONTENTS Page Section 1.0 INTRODUCTION AND EXECUTIVE SUMMARY . . . . . . . . • . . . . . . . . 1 -1 . . 1 -1 1.1 Introduction . . . . . . . . . . . . . . . . . . . 1 -1 1.1.1 Background . . . . . . . . . . . . . . . . . . . . . . . 1 -1 1.1.2 CEQA Compliance . . . . . . . . . . . . . . . . . . . . . . . 1-2 1.2 Project Overview . . . . . . . . . . . . . . . . . . . . . . . 1 -2 1.2.1 Characteristics . . . . . . . . • . . • • . • • . . . ' ' 1 -2 1.2.2 Environmental Setting . . . . • . . . . . . . • . . . 1.3 Significant Environmental Effects and Mitigation Measures • • . 1 -4 1.4 Comparison of Project and Alternatives . . . . • • • ' ' ' . . . 1 -5 1.5 Areas of Controversy and Issues to be Resolved . • • • ' . ' . . 1 -5 1.6 Findings and Statement of Overriding Considerations . . . . . . . 2 -1 2.0 PROJECT DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 -1 2.1 Location . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 -1 2.2 Objectives . . . . . . . . . . . . . . . . . . . . . . . . 2.3 Discretionary Actions and Permitting . . . . . . . . . . . . . . 2 -1 2.3.1 Concurrent Actions and Permitting . . • . . . • . . . . . . 2 -1 2 -6 2.3.2 Subsequent Actions and Permitting . . • . . . . . . . . . • . 2 -6 2.4 Characteristics . • . 2 -6 2.4.1 Encinitas Ranch Specific Plan . . . . . . . . . . . . . . . 2 -26 2.4.2 Leucadia Boulevard Alignment . . . . . . . . . . . . . . . . 2 -26 2.4.3 Annexation Area . . . . . . . . . . . . . . . . . . . . . 3.0 ENVIRONMENTAL SETTING . . . . . . . . . . . . . . . . . . . . . . . 3 -1 . . 3 -1 3.1 Vicinity . . . . . . . . . . . . . . . . . . . . . . . . . . 3 -1 3.1.1 Geology and Soils . . . . . . . . . . . . . . . . . . . . . 3 -1 3.1.2 Topography and Drainage . . . . . . . . . . . . . . . . . . 3 -1 3.1.3 Biological Resources . . . . . . . . . . . . . . . . . . . 3 -1 3.1.4 Cultural Resources and Paleontology . . . . . . . . . . . . . . . 3 -2 3.1.5 Land Use . . . . . . . . . . . . . . . . . . . . . . 3 -2 3.1.6 Transportation and Public Services . . . . . . . . . . . . 3 -2 3.1.7 Potential Future Conditions . . . . . . . . . . . . . . . . . . 3 -3 3.2 Region . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 -3 3.2.1 Geology and Soils . . . . . . . . . . . . . . . . . . . . . 3 -3 3.2.2 Topography and Drainage . . . . . . . . . . . . . . . . . . 3 -4 3.2.3 Biological Resources . . . . . . . . . . . . . . . . . . . 3 -4 3.2.4 Cultural Resources and Paleontology . . . . . . . . . . . . . 3 -4 3.2.5 Land Use . . . . . . . . . . . . . . . . . . . . . . . . 3 -4 3.2.6 Transportation and Public Services . . . . . . . . . . . . 3 -4 3.2.7 Potential Future Conditions . . . . . . . . . . . . . . . . 3 -5 3.2.8 Rare or Unique Resources . . . . . . . . . . . . . . . . . 3 -5 3.3 General and Regional Plan Consistency . . . . . . . . . . . . . 3 -5 3.3.1 General Plan . . . . . . . . . . . . . . . . . . . . . . . 3 -5 3.3.2 Regional Plans . . . . . . . . . . . . . . . . . . . . . . 4.0 ENVIRONMENTAL IMPACT ANALYSIS . . . . . . . . . . . . . . . . . . . 4 -1 4 -1 4.1 Geology and Soils . . . . . . . . . . . . . . . . . . . . . . . 4 -1 4.1.1 Existing conditions . . . . . . . . . . . . . . . . . . . . 4 -2 4.1.2 Environmental effects . . . . . . . . . . . . . . . . . . . 4 -4 4.1.3 Mitigation measures . . . . . . . . . . . . . . . . . . . . 4 -5 4.2 Hazardous Materials . . . . . . . . . . . . . . . . . . . . . . 4 -5 4.2.1 Existing conditions . . . . . . . . . . . . . . . . . . . . 4 -8 4.2.2 Environmental effects . . . . . . . . . . . . . . . . . . . 4 -8 4.2.3 Mitigation measures . . . . . . . . . . . . . . . . . . . . 4-9 4.3 Hydrology and Grading . . . . . . . . . . . . . . . . . . . . . 4 -9 4.3.1 Existing conditions . . . . . . . . . . . . . . . . . . . . 4 -12 4.3.2 Environmental effects . . . . . . . . . . . . . . . . . . . 4 -22 4.3.3 Mitigation measures . . . . . . . . . . . . . . . . . . • • i TABLE OF CONTENTS Section Paae 4.4 Topographic Alteration and Visual Quality . . . . . . . . . . . 4 -28 4.4.1 Existing conditions . . . . . . . . . . . . . . . . . . . . 4 -28 4 -34 4.4.2 Environmental effects . . . . . . . . . . . . . . . . . . . 4 -40 4.4.3 Mitigation measures . . . . . . . . . . . . . . . . . . . . 4 -43 4.5 Biological Resources . . . . . . . . . . . . . . . . . . . . . . 4 -43 4.5.1 Existing conditions . . . . . . . . . . . . . . . . . . . . 4 -55 4.5.2 Environmental effects . . . . . . . . . . . . . . . . . . . 4 -62 4.5.3 Mitigation measures . . . . . . . . . . . . . . . . . . . . 4 -66 4.6 Cultural Resources and Paleontology . . . . • . . . . . . . . . 4 -66 4.6.1 Existing conditions . . . . . . . . . . . . . . . . . . . . 4 -68 4.6.2 Environmental effects . . . . . . . . . . . . . . . . . . . . 4 -71 4.6.3 Mitigation measures . . . . . . . . . . . . . . . . . . . 4 -72 4.7 Land Use Compatibility . . . . . . . . . . . . . . . . . . . . . 4 -72 4.7.1 Existing conditions . . . . . . . . . . . . . . . . . . . . 4 -91 4.7.2 Environmental effects . . . . . . . . . . . . . . . . . . . 4 -96 4.7.3 Mitigation measures . . . . . . . . . . . . . . . . . . . . 4 -97 4.8 General Plan Consistency . . . . . . . . . . . . . . . . . . . . 4 -97 4.8.1 Existing conditions . . . . . . . . . . . . . . . . . . . . 4 -97 4.8.2 Environmental effects . . . . . . . . . . . . . . . . . . . 4 -126 4.8.3 Mitigation measures . . . . . . . . . . . . . . . . . . . . 4 -130 4.9 Agriculture . . . . . . . . . . . . . . . . . . . . . . . . 4 -130 4.9.1 Existing conditions . . . . . . . . . . . . . . . . . . . 4 -150 4.9.2 Environmental effects . . . . . . . . . . . . . . . . . . 4 -155 4.9.3 Mitigation measures . . . . . . . . . . . . . . . . . . . . . 4 -156 4.10 Traffic . . . . . . . . . . . . . . . . 4 -156 4.10.1 Existing conditions . . . . . . . . . . . . . . . . . . . 4 -160 4.10.2 Environmental effects . . . . . . . . . . . . . . . . . . 4 -174 4.10.3 Mitigation measures . . . . . . . . . . . . . . . . . . . 4 -174 4.11 Noise . . . . . . . . . . . . . . . . 4 -176 4.11.1 Existing conditions . . . . . . . . . . . . . . . . . 4 -181 4.11.2 Environmental effects . . . . . . . . . . . . . . . . . . 4 -191 4.11.3 Mitigation measures . . . . . . . . . . . . . . . . . . . . 4 -193 4.12 Air Quality . . . . . . . . . . . . . . . . . . . . . . . . 4 -193 4.12.1 Existing conditions . . . . . . . . . . . . . . . . . . . 4 -196 4.12.2 Environmental effects . . . . . . . . . . . . . . . . . . 4 -201 4.12.3 Mitigation measures . . . . . . . . . . . . . . . . . . . 4 -202 4.13 Public Facilities and Services . . . . . . . . . . . . . . . . 4 -202 4.13.1 Existing conditions . . . . . . . . . . . . . . . . . . . 4 -217 4.13.2 Environmental effects . . . . . . . . . . . . . . . . . . 4 -225 4.13.3 Mitigation measures . . . . . . . . . . . . . . . . . . 5.0 ALTERNATIVES TO THE PROPOSED ACTION . . . . . . . . . . . . . . . . 5 -1 5 -1 5.1 Reduced Effects on Sensitive Resources . . . . . . . . . . . . . 5 -1 5.1.1 Characteristics . . . . . . . . . . . . . . . . . . . . . . 5 -1 5.1.2 Comparative Impact Analysis . . . . . . . . . . . . . . . . . 5 -22 5.1.3 Mitigation Measures . . . . . . . . . 5 -22 5.2 Different Leucadia Boulevard Alignment . . . . . . . . . . . . . 5 -22 5.2.1 Characteristics . . . . . . . . . . . . . . . . . . . . . . 5 -25 5.2.2 Comparative Impact Analysis . . . . . . . . . . . . . . . . . 5 -38 5.2.3 Mitigation Measures . . . . . . . . . . . 5 -38 5.3 Reduced Effects on Encinitas Creek Floodplain . . . . . . . . . 5 -38 5.3.1 Characteristics . . . . . . . . . . . . . . . . . . . . . . 5 -38 5.3.2 Comparative Impact Analysis . . . . . . . . . . . . . . . . . 5 -40 5.3.3 Mitigation Measures . . . . . . . . . . . . . . . . . . . 5 -40 5.4 Different Uses and Use Configuration . . 5 -40 5.4.1 Characteristics . . . . . . . . . . . . . . . . . . . 5 -40 5.4.2 Comparative Impact Analysis . . . . . . . . . . . . . . 5 -42 5.5 Strict Adherence to Encinitas General Plan Criteria . . . . . . 5 -42 5.5.1 Characteristics . . . . . . . . . . . . . . . . . 5 -43 5.5.2 Comparative Impact Analysis . . . . . . . . . . . ii TABLE OF CONTENTS Section page 5.6 County Jurisdiction . . . . . . . . . . . . . . . . . . . . . . 5 -44 5.6.1 Characteristics . . . . . . . . . . . . . . . . . . . . . . 5 -44 5.6.2 Comparative Impact Analysis . . . . . . . . . . . . . . . . 5 -46 5.7 Different Location . . . . . . . . . . . . . . . . . . . . . . . 5 -46 5.7.1 Characteristics . . . . . . . . . . . . . . . . . . . . . . 5 -47 5.7.2 Comparative Impact Analysis . . . . . . . . . . . . . . . . 5 -49 5.8 No Project . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 -50 5.8.1 Characteristics . . . . . . . . . . . . . . . . . . . . . . 5 -50 5.8.2 Comparative Impact Analysis . . . . . . . . . . . . . . . . 5 -51 6.0 GENERAL ASSESSMENT . . . . . . . . . . . . . . . . . . . . . . . . 6 -1 6.1 Any Significant Environmental Effects Which Cannot be Avoided if the Proposal is Implemented . . . . . . . . . . . . . . . . . 6 -1 6.2 The Relationship Between Local Short -germ Uses of Man's Environment and the Maintenance and Enhancement _i Long -term Productivity 6 -1 6.3 Any Significant Irreversible Environmental Changes Which Would be Involved in the Proposed Action Should It be Implemented 6 -2 6.4 The Growth Inducing Impact of the Proposed Action . . . . . . . 6 -2 6.4.1 Growth Potential . . . . . . . . . . . . . . . . . . . . . 6 -2 6.4.2 Growth Influences . . . . . . . . . . . . . . . . . . . . . 6 -4 6.4.3 Growth Management . . . . . . . . . . . . . . . . . . . . 6 -5 6.5 Effects Found Not to be Significant . . . . . . . . . . . . . . 6 -9 6.6 Cumul_ =ive Impacts . . . . . . . . . . . . . . . . . . . . . . . 6 -9 6.6.1 Related Projects . . . . . . . . . . . . . . . . . . . . . 6 -9 6.6.2 Cumulative Impact Analysis . . . . . . . . . . . . . . . . 6 -27 6.6.3 Reduced Development for Green Valley Master Plan . . . . . 6 -30 7.0 MITIGATION MONITORING AND r:PORTING PROGRAM . . . . . . . . . . 7 -1 8.0 REFERENCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 -1 9.0 ORGANIZATIONS AND PERSONS CONSULTED . . . . . . . . . . . . . . . . 9 -1 10.0 DOCUMENT PREPARERS . . . . . . . . . . . . . . . . . . . . . . . . 10 -1 APPENDICES A through I under separate cover iii. LIST OF TABLES Pag- Table 1-1 Specific Plan Land Use Summary (Condensed) 1 -3 1 -6 1 -2 Potential Significant Effects and Mitigation Measures Summary . . . 2 -1 City of Encinitas Application and Permit Requirements 2 -7 for Specific Plan Development . . . . . . . . . . . . . . . . . 2 -9 2 -2 Specific Plan Land Use Plan A Summary . . . . • • • ' . . ' ' . . 2 -13 2 -3 -24 Specific Plan Land Use Plan B Summary . . . . . . . . . . . . . . . 2 2 -4 Specific Plan Phasing Plan A Summary . . • • • • . ' 2 -25 2 -5 Specific Plan Phasing Plan B Summary . . . . . . • . . . . . . . 4 -1 Runoff Peak Flow for Specific Plan . . . . . . . . . . . . . . . . 4 -16 4 -17 4 -2 Water Quality Elements for Specific Plan . . . . . . . . . . . . . 4 -19 4 -3 Grading Elements for Specific Plan . . . . . . . . . . . . . . . . 4 -44 4 -4 Vegetation Types and Areal Extent Summary . . . . . . . . . . . . . 4 -56 4 -5 Impacted Vegetation Types Summary . . . . . . . . . . . . . . . . . 4 -59 4 -6 Impacted Sensitive Plant Species Summary . . . . . . . . . . . . . 4 -62 4 -7 Impacted Vegetation Mitigation Requirements . . . . . . . . . . . . 4 -98 4 -8 Encinitas General Plan Goals and Policies . . . . . . . . . . 4 -112 4 -9 San Dieguito Community Plan Goals and Policies . . . . . . . . . 4 -117 4 -10 Local Coastal Program San Dieguito Land Use Plan . . . . . . . . 4 -133 4 -11 Soils Suitability for Farming in Project Area . . . . . . . . . . 4 -135 4 -12 Soils Capability Unit Descriptions in Project Area . . . . . . . 4 -136 4 -13 Soils Storie Index Descriptions for San Diego County . . . . . . 4 -137 4 -14 Agricultural Crop Acreage and Other Uses in Project Area . . . . No.l Williamson Act Agreements Status 4 -142 4 -15 4 -16 Ecke Agricultural Preserve Agricultural Crop Acreage and Value in San Diego County . . . • 4 -147 4 -17 Nursery Products and Market Flowers Category 1990 -1991 . . 4 -148 4 -18 Acres and Valuee • • • • ' ' ' ' ' . Estimated Agricultural • Acreage.Remaining in Production . . . . 4 -152 4 -19 in Project Area • ' ' ' ' ' ' . ' ' ' ' Existing Intersection Capacity • Utilization Summary . • • ' ' . 4 -159 4 -163 4 -20 Post Year 2010 Intersection Capacity Utilization Summary • • ' ' 4 -165 4 -21 Interim Year Intersection Capacity Utilization Summary • • . ' ' 4 -167 4 -22 Specific Plan Land Use and Vehicle Trip Generation Summary . . 4 -23 Post Year 2010 Intersection Capacity Utilization with 4 -172 Via Cantebria Extension Summary . . . . . . . . • • • ' ' ' ' . . 4 -175 4 -24 4 -25 Traffic Impact Mitigation Requirements . . . . . . . . . . . . . Regional Commercial Center Access Drive Configuration Guidelines 4 -175 4 -26 Existing Noise Levels for Leucadia Boulevard Improvement Section 2010 4 -177 4 -179 4 -27 Noise Level Changes for General Plan Buildout Post Year - 4 -182 4 -28 Noise Level Changes for Specific Plan Land Use Plan A . . . . . . 4 -29 Noise Level Changes for Specific Plan Land Use Plan A Carlsbad ' ' 4 -184 With Northern Extension of Via Cantebria Into . • ' 4 -186 4 -30 Internal Road Noise Contours for Specific Plan . . . . . . . . . 4 -31 Post Year 2010 Noise Contours for Leucadia Boulevard 4 -187 Improvement Section • • • • • • • • • ' ' ' ' ' 4 -32 Post Year 2010 Noise Levels for Leucadia Boulevard 4 -188 4 -33 Improvement Section . . . . . . . • • • • ' ' ' ' ' . . Representative Noise Barrier Characteristics for Leucadia 4 -190 Boulevard Improvement Section . . . . . . . . . . • • • 4 -194 4 -34 Ambient Air Quality Standards . . . . . . . . . . • . • ' ' ' . 1991 Ambient Air Quality Data for Oceanside California • • • 4 -196 4 -35 4 -36 Vehicle Speed and Vehicle Miles Traveled . . . . • ' ' ' . ' . . 4 -198 4 -200 4 -37 Air Pollutants from Mobile Sources . . . • • • • • ' ' . ' . . . 4 -200 4 -38 Air Pollutants from Stationary Sources . . . . • • ' ' ' . . . 4 -201 4 -39 Air Pollutants from Combined Sources . • • . • ' . ' ' ' ' . . . 4 -205 4 -40 Selected Existing Infrastructure Improvements . . • • • . ' . . . 4 -207 4 -41 Selected Proposed Infrastructure Improvements . • . . • • ' . . 4 -219 4 -42 Estimated Water Demands . . . . . . . . . . . . . . . . . . . . 4 -222 4 -43 Estimated Sewer Demands . . . . . . . . . . . . . . . . . . . . iv v LIST OF TABLES Table Page 5 -1 Reduced Effects on Sensitive Resources Alternative Land Use Plan A Summary . • • . . . . . . . . . 5 -2 5 -2 Reduced Effects on Sensitive Resources Alternative Land Use Plan B Summary . . . . . . . . . . . . . . . . . . . . . . . . . 5 -5 5 -3 Reduced Effects on Sensitive Resources Alternative Runoff Peak Flow . . . . . . . . . . . . . . . . . . . . . . . . . 5 -9 5 -4 Reduced Effects on Sensitive Resources Alternative Water Quality Elements . . . . . . . . . . . . . . . . . . . . . . 5 -10 5 -5 Reduced Effects on Sensitive Resources Alternative Grading Elements . . . . . . . . . . . . . . . 5 -15 5 -6 Reduced Effects on Sensitive Resources Alternative Impacted Vegetation Types Summary . . . . . . . . . . . . 5 -18 5 -7 Reduced Effects on Sensitive Resources Alternative Impacted Sensitive Plant Species Summary . . . . . . . . . . . . . 5 -21 5 -8 Reduced Effects on Sensitive Resources Alternative Impacted Vegetation Mitigation Requirements . . . . . . . . . . . . 5 -23 5 -9 Different Leucadia Boulevard Alignment Alternative Scheme 1 Plan A Summary . . . . . . . . . . . . . . . . . . . . . . 5 -30 5 -10 Different Leucadia Boulevard Alignment Alternative Scheme 1 Plan B Summary . . . . . . . . . . . . . . . . . . . . . . 5 -31 5 -11 Different Leucadia Boulevard Alignment Alternative Scheme 2 Plan A Summary . . . . . . . . . . . . . . . . . . . . . . 5 -32 5 -12 Different Leucadia Boulevard Alignment Alternative Scheme 2 Plan B Summary . . . . . . . . . . . . . . . . . . . . . . 5 -33 5 -13 Different Leucadia Boulevard Alignment Bluff Cut Grading Elements . 5 -35 5 -14 Different Leucadia Boulevard Alignment Impacted Vegetation Types Summary . . . . . . . . . . . . . . . . . 5 -36 5 -15 Different Leucadia Boulevard Alignment Impacted Sensitive Plant Species Summary . . . . . . . . . . . . . 5 -36 5 -16 Different Leucadia Boulevard Alignment Habitat Fragmentation . . . 5 -38 5 -17 Different Uses and Use Configuration Alternative Summary . . . . . 5 -41 5 -18 Encinitas General Plan Land Use Alternative Land Use Summary . . . 5 -43 5 -19 San Diego County General Plan Land Use Alternative Land Use Summary 5 -45 6 -1 Encinitas General Plan Growth Management Program . . . . . . . . . 6 -6 6 -2 Related Projects Significant Individual and Cumulative Environmental Impacts and Mitigation Measures Summary . . . . . . . 6 -12 6 -3 Reduced Development for Green Valley Master Plan . . . . . . . . . 6 -30 7 -1 Mitigation Monitoring and Reporting Program . . . . . . . . . . . . 7 -2 v LIST OF FIGURES vi Page Figure 2 -2 2 -1 Region . . . . . . . . . . . . 2 -3 2 -2 Encinitas Environs Road System . . . . . . . . . . . . 2 -4 2 -3 Encinitas Communities . . . . . . . . . . . . . . . . . . . 2 -5. 2 -4 Project Components . . . . . . . . . . . . . . . . . . . . . . 2 -10 2 -5 Specific Plan Planning Areas . . . . . . . . . . . . . . . . . . . 2 -11 2 -6 Land Use Plan A . . . . . . . . . . . . . . . . . . . . . . . . 2 -14 2 -7 Regional Commercial Center Site Plan . . . . . . . . . . . . 2 -15 2 -8 Land Use Plan B . . . . . . . . . . . . . . . . . . . . 2 -18 2 -9 Circulation Plan Land Use Plan A . . . . . . . . . . . . . . . . . 2 -19 2 -10 Circulation Plan Land Use Plan B . . . . . . . . . . . . . . . . . 2 -20 2 -11 Zoning Land Use Plan A . . . . . . . . . . . . . . . . . . . . . . 2 -21 2 -12 Zoning Land Use Plan B . . . . . . . . . . . . . . . . . . . . . . 2 -28 2 -13 Leucadia Boulevard Alignment Western Segment A . . . . . . . . . . 2 -29 2 -13 Leucadia Boulevard Alignment Western Segment B . . . . . . . . . . 2 -30 2 -14 Leucadia Boulevard Alignment Middle Segment . . . . . . . . . . . . 2 -31 2 -15 Leucadia Boulevard Alignment Eastern Segment A . . . . . . . . . . 2 -32 2 -15 Leucadia Boulevard Alignment Eastern Segment B . . . . . . . . . . . 4 -3 4 -1 Geologic Units . . . . . . . . . . . . . . . . . . . . . . . . . 4 -6 4 -2 Hazardous Materials . . . . . . . . . . . . . . . . . . . . . . . . 4 -11 4 -3 Hydrologic Conditions . . . . . . . . . . . . . . . . 4 -14 4 -4 Slope Conditions . . . . . . . . . . . . 4 -15 4 -5 Drainage Basins . . . . . . . . . . . 4 -20 4 -6 Graded Banks Land Use Plan A . . . . . . . . . . . . . . . . . . . 4 -21 4 -7 Graded Banks Land Use Plan B . . . . . . . . . . . . . . . . . . . 4 -24 4 -8 Slope Encroachment Land Use Plan A . . . . . . . . . . . . . . 4 -25 4 -9 Slope Encroachment Land Use Plan B . . . . . . . . . . . . . 4 -26 4 -10 Floodplain Encroachment Encinitas Creek . . . . . . . . . . 4 -29 4 -11 Topographic Conditions . . . . . . . . . . . . . . . 4 -32 4 -12 Vantage Points . . . . . . . . . . . . . . . . . . . . . 4 -33 4 -13 Encinitas Visual Resources . . . . . . . . . . . . . . . . . . 4 -38 4 -14 Cross Sections Green Valley . . . . . . . . . . . . . . . . . . . . 4 -39 4 -15 4 Visual Simulation Vantage Points . . . . . Visual Simulation Regional Commercial Center . . . . . . . . . . . Leucadia Boulevard . -16 ' ' _ 4 -41 4 -17 Alignment . • • ' ' Visual Simulation Leucadia Boulevard Alignment Western Segment 4 -42 4 -18 Vegetation Communities . . . . . . . . . . . . . . . . . . . 4 -45 4 -50 4 -19 Sensitive Species . . . . . . . . . . . . . . . . . . . . . . . . . 4 -57 4 -20 Impacted Vegetation Communities . . . . . . . . . . . . . . . . . . 4 -60 4 -21 Impacted Sensitive Species . . . . . . . . . . . . . . . . . . . . . 4 -73 4 -22 Current Land Uses . . . . . . . . . . . . . . . . . . . . . . . . 4 -78 4 -23 Future Land Uses Leucadia . . . . . . . . . . . . . . . . . . . . . 4 -79 4 -24 Future Land Uses Old Encinitas . . . . . . . . . . . . . . . . . . 4 -80 4 -25 Future Land Uses New Encinitas . . . . . . . . . . . . . . . . . . 4 -81 4 -26 Encinitas Special Study Overlay . . . . . . . . . . . . . . . . . . 4 -82 4 -27 Encinitas Circulation Plan . . . . . . . . . . . . . . . . . . . . 4 -83 4 -28 Encinitas Recreation Facilities Plan . . . . . . . . . . . . 4 -84 4 -29 Encinitas Bikeway Facilities Plan . . . . . . . . . . . . . . 4 -87 4 -30 Future Land Use San Dieguito Community Plan . . . . . . . . . . . . . 4 -134 4 -31 Soil Series . . . . . . . . . . . . . . . . . . . . . . . . . . 4 -141 4 -32 Ecke Agricultural Preserve . . . . . . . . . . . . . . . . . . . 4 -157 4 -33 Existing Traffic Volumes . . . . . . . . . . . . . . . . . . 4 -158 4 -34 Existing Intersections . . . . . . . . . . . . . . . . . . . 4 -159 4 -35 Long -Range Traffic Volumes . . . . . . . . . . . . . . . . . . . 4 -162 4 -36 Future Intersections . . . . . . . . . . . . . . . . . . . . . . 4 -164 4 -37 Interim Traffic Volumes . . . . . . . . . . . . . . . . . . . . 4 -168 4 -38 Trip Distribution . . . . . . . . . . . . . . . . . . . . . . . 4 -169 4 -39 Long -Range Traffic Volumes Specific Plan . . . . . . . . . . . . 4 -171 4 -40 Long -Range Traffic Volumes Extension of Via Cantebria . . . . . . 4 -173 4 -41 Interim Traffic Volumes Specific Plan . . . . . . . . . . . . . . vi LIST OF FIGURES Figure P -2 4 -42 Existing and Proposed Water Facilities . . . . . . . . . . . . . 4 -204 4 -43 Future Reservoir Alternative Sites . . . . . . . . . . . . . . . 4 -210 4 -44 Existing and Proposed Sewer Facilities . . . . . . . . . . . . . 4 -213 5 -1 Alternative Land Use Plan A . . . . . . . . . . . . . . . . . . . . 5 -3 5 -2 Alternative Land Use Plan B . . . . . . . . . . . . . . . . . . . . 5 -4 5 -3 Zoning Alternative Land Use Plan A . . . . . . . . . . . . . . . . 5 -6 5 -4 Zoning Alternative Land Use Plan B . . . . . . . . . . . . . . . . 5 -7 5 -5 Graded Banks Alternative Land Use Plan A . . . . . . . . . . . . . 5 -11 5 -6 Graded Banks Alternative Land Use Plan B . . . . . . . . . . . . . 5 -12 5 -7 Slope Encroachment Alternative Land Use Plan A . . . . . . . . . . 5 -13 5 -8 Slope Encroachment Alternative Land Use Plan B . . . . . . . . . . 5 -14 5 -9 Impacted Vegetation Communities Alternative Land Use Plans . . . . 5 -17 5 -10 Impacted Sensitive Species Alternative Land Use Plans . . . . . . . 5 -20 5 -11 Alternative Leucadia Boulevard Alignment Encinitas Standards . . . 5 -24 5 -12 Alternative Leucadia Boulevard Alignment Scheme 1 Plan A . . . . . 5 -26 5 -13 Alternative Leucadia Boulevard Alignment Scheme 1 Plan B . . . . . 5 -27 5 -14 Alternative Leucadia Boulevard Alignment Scheme 2 Plan A . . . . . 5 -28 5 -15 Alternative Leucadia Boulevard Alignment Scheme 2 Plan B . . . . . 5 -29 5 -16 Alternative Leucadia Boulevard Alignment Scheme 3 . . . . . . . . . 5 -30 5 -17 Alternative Floodplain Encroachment . . . . . . . . . . . . . . . . 5 -39 5 -18 Different Sites . . . . . . . . . . . . . . . . . . . . . . . . . . 5 -48 6 -1 Related Projects . . . . . . . . . . . . . . . . . . . . . . . . . 6 -11 vii 1.0 INTRODUCTION AND EXECUTIVE SUMMARY 1.1 INTRODUCTION 1.1.1 BACKGROUND upon submittal of an application to prepare a specific plan for the Ecke Sphere of Influence, the City of Encinitas Community Development Department established a detailed procedure for plan preparation and permitting in accordance with Encinitas General Plan goals and policies particular to the sphere. The Encinitas Ranch Specific Plan Task Force was formed in July of 1992 to guide formation of the specific plan to be produced by T &B Planning Consultants for the applicant, the Carltas Company. The task force was charged with issue identification, determination of goals and objectives, consideration of environmental constraints, consideration of land use options, selection of a preferred plan, and determination of development standards for the preferred plan. Public, Planning Commission, and City Council workshops were held to accomplish or complete some of these tasks. The specific plan boundaries established by the applicant excluded some properties in the Sphere of Influence owned by other interests. In order to avoid creating any islands or isolate individual small parcels it was decided that the excluded ownerships would be included together with the specific plan area in annexation to the City. Preparation of the specific plan triggered the need to identify a precise alignment and design for improvements to, and extension of, Leucadia Boulevard through the plan area in accordance with the Encinitas Circulation Plan and General Plan goals and policies particular to this roadway. The Leucadia Boulevard Task Force was formed in January of 1993 to guide the improvement and extension alignment details to be prepared by Leedshill - Herkenhoff for the City. The task force was charged with issue identification, consideration of environmental constraints, consideration of alternative design concepts, and selection of a preferred alternative. Public workshops were held in conjunction with the various tasks. In order to minimize or eliminate negative environmental effects of the specific plan and roadway extension, the City contracted Curtis Scott Englehorn and Associates to conduct phased environmental planning and analysis. With the first phase, an environmental resource data base was established and evaluated to identify opportunities and constraints for development of the study area. This phase provided input for preparation of environmentally responsive specific plan land use options and road extension alignments. Resource issues studied were geology /soils, hazardous materials, hydrology, biological resources, cultural and paleontological resources, and public facilities. The second phase was devoted to identification of any residual significant effects of, and mitigation measures for the preferred specific plan and roadway alignment. Alternatives to the proposed specific plan were also identified and evaluated. Data and analysis of both phases were then incorporated into an environmental impact report evaluating all resource issues related to the overall project. 1.1.2 CEQA COMPLIANCE This environmental document is by definition an environmental impact report (EIR). It has been prepared in type and scope in compliance with the California Environmental Quality Act (CEQA) of 1970 as amended, and Title 14, Div. 6.3 (CEQA Guidelines) of the California Code of Regulations as revised. The report has also been prepared in accordance with the City of Encinitas Local Guidelines for Implementation of the California Environmental Quality Act. CEQA Guidelines note that an EIR is intended to inform public agency decisionmakers and the public generally of the significant environmental effects of a project, to identify 1 -1 possible ways to minimize the significant effects, and to describe reasonable alternatives to the project. The preliminary scope of this EIR was determined through initial study of the project by the City of Encinitas Community Development Department. It was broadened and given more detail by early public consultation in project workshops, and early responsible and trustee agency consultation in meetings. The scope was then confirmed and completed with responses to a Notice of Preparation issued in March of 1993. In a format and content complying with CEQA Guidelines, this introduction is followed by an executive summary to complete the first section of the EIR. Section 2 provides a description of the project. This is followed by Section 3 which describes the environmental setting of the project vicinity and region. Section 4 presents existing conditions for each resource issue, evaluates project impacts, and identifies mitigation measures. A reasonable range of alternatives to the project are then described in Section 5. Section 6 contains a general assessment of mandatory topics. A mitigation monitoring and reporting program is then provided in Section 7. Finally, Sections 8, 9, and 10 list references, organizations and persons consulted, and document preparers. Technical investigations conducted in support of, and summarized in the EIR are bound together under separate cover as an appendix to the document. 1.2 PROJECT OVERVIEW 1.2.1 CHARACTERISTICS The Encinitas Ranch Specific Plan area, Leucadia Boulevard alignment, and annexation area (project) are located in the northwestern sector of the City of Encinitas, San Diego County, California. This project lies east of Interstate 5 and west of El Camino Real, south of La Costa Avenue and north of Encinitas Boulevard. For the Specific Plan there are two relatively similar land use plans depending on the size and location of future agricultural activities in the 852.8 acre Specific Plan area. Land use summaries for the plans, called Land Use Plans A and B are presented in a condensed form in Table 1 -1. The Specific Plan also includes other elements related to the land use plans such as a zoning ordinance, design guidelines, and a phasing plan. The Leucadia Boulevard alignment involves improvements to the existing roadway between I -5 and the Specific Plan area and an extension through the plan area to E1 Camino Real. Annexation includes the Specific Plan area and all other properties within the 907.8 acre Ecke Sphere of Influence. Principal discretionary actions by the City of Encinitas are adoption of the Specific Plan and Leucadia Boulevard alignment, certain amendments to the Encinitas General Plan, and approval of annexation to the City. Examples of other related concurrent or subsequent discretionary actions and permitting are approvals of a rezone, Specific Plan Public Facilities Financing Plan (Development Agreement), special district annexations and /or boundary adjustments, Williamson Act contract cancellation and /or amendment, precise plans for certain planning areas, and individual tentative maps and use permits. Certain associated permits will also be required by state and federal agencies. 1.2.2 ENVIRONMENTAL SETTING Mapped geologic units for the project area are fills, topsoil /colluvium, alluvium, Terrace Deposits, and Torrey Sandstone. There are no deep - seated landslides or active faults in the area. Soil associations are Marina - Chesterton, Salinas -Corral itos, and Las F lore s- Huerhuero, all suitable for agricultural production. Topography is dominated by a north to south trending coastal mesa in the west and the broad Green Valley in the east. The mesa is dissected in the northwest by finger canyons of Indian Head canyon. There are steep slopes on the bluffs along the western side of Green Valley and along the 1 -2 Table 1 -1 Specific Plan Land Use Summary (Condensed) Land Use Plan A Land Use Type Acreage (AC) Commercial /Office Square Footage (SF) Dwelling Unit Density (DU /AC) Duelling Units (DU) Sin Le Famil y Residential 116.4 -- 3.2 377 Mixed Use 87.3 220,000 30.0 873 Elementary School 12.1 -- -- -- RegionaL Commercial Center 73.8 650,000 -- -- Golf Course (18 holes & club house) 173.4 -- -- -- A riculture 134.1 -- -- Magdalena Ecke Community Park 29.8 -- -- -' Open Space 179.6 -- -- Roads (circulation element) 46.3 -- -- Fspecific Plan 852.8 870,0001 -- 1,2502 Land Use Plan B Land Use Type Acreage (AC) Commercial /Office Square Footage (SF) Duelling Unit Density (DU /AC) Dwelling Units (DU) Sin le Famil y Residential 157.1 -- 2.9 461 Mixed Use 47.6 75,000 30.0 665 Elementary School 10.0 -- -- -- Re ionaL Commercial Center 73.8 650,000 -- -- Community Use 17.2 145,000 — -- Golf Course (18 holes & club house) 173.4 -- -- A riculture 126.0 -- -- -' Magdalena Ecke Community Park 29.8 -- Open Space 170.3 -- -- Roads (circulation element) 47.6 -- -- '- Specific Plan 852.8 870,0001 -- 1,1263 1 A 150 room hotel /inn will be permitted if a major use permit is approved pursuant to the Specific 2 Plan in a portion of the North Mesa planning area. Up to 1385 dwelling units will be permitted if a rezone is approved pursuant to the Specific Plan allowing a maximum multi- family density of 10 du /ac in portions of the Quail Hollow East and North 3 Mesa planning areas. Up to 1261 dwelling units will be permitted if a rezone is approved pursuant to the Specific Plan allowing a maximum multi - family density of 10 du /ac in portions of the Quail Hollow East and North Mesa planning areas. Source: T &B Planning Consultants (1993) 1 -3 walls of the finger canyons in the northwest. Drainage on the upper mesa is westerly to Indian Head canyon and Batiquitos Lagoon and to Cottonwood Creek and the Pacific Ocean while Green Valley drains to Encinitas Creek and Batiquitos Lagoon. Natural vegetation covers roughly 220 acres, or almost 25 percent of the project area. Principal vegetation types are southern maritime chaparral and Diegan coastal sage scrub. Some riparian woodland, riparian scrub, and wetlands are also found on the site. These plant communities provide sensitive habitat. Examples of sensitive plants on the property are Encinitas baccharis, Del Mar sand aster, summer- holly, wart - stemmed ceanothus, Del Mar manzanita, and California adolphia. Representative sensitive animals are the orangethroat whiptail and coastal California gnatcatcher. The chaparral primarily occurs as a large stand on the bluff bordering Green Valley and is contiguous with similar chaparral offsite to the north. The sage scrub is found mostly in the finger canyons in the northwest. The riparian and wetland communities are best represented along Encinitas Creek in Green Valley. Geologic formations underlying the project area are marine in origin and have the potential for paleontological resources. Prehistoric use of the area is evidenced by previously recorded archaeology sites, two of which have not been completely destroyed. There are numerous historical sites in the project area. Current use is agriculture with greenhouses and open flower fields on the upper mesa and open flower fields on the floor of Green Valley. Access is by driveways and farm roads from surrounding roadways. The Specific Plan area carries an Encinitas General Plan land use designation and Zoning Code classification of [SP] Specific Plan. The majority of the project area is also designated [AC] Agricultural Cropland in conjunction with [SPA] Specific Plan Area [2.8] by the San Diego County San Dieguito Community Plan. The primary County zone classification for the area is S -88. 1.3 SIGNIFICANT ENVIRONMENTAL EFFECTS AND MITIGATION MEASURES A number of potential significant environmental effects associated with the project have been identified during detailed analysis. Significant impacts, adopted impact controls, mitigation measures, and the level Of significance after controls and /or mitigation measures are summarized in Table 1 -2. Adopted impact controls are measures in affect to reduce potential significant effects. An example is a grading ordinance which requires erosion control measures for all development both during and after grading activities. Mitigation measures include certain Specific Plan elements as well as other additional requirements. An example of a Specific Plan element is the Zoning Ordinance Development Standards which limit building height. Other additional measures are those apart from the Specific Plan such as replacement of lost sensitive native vegetation. 1.4 COMPARISON OF PROJECT AND ALTERNATIVES Alternatives to the project include redesign of the Specific Plan to reduce effects on sensitive resources, several different alignments for the Leucadia Boulevard bluff cut, and redesign of the Specific Plan to reduce Encinitas Creek floodplain encroachment. Additional alternatives are the specific plan land use option not favored during plan formulation, a specific plan in strict compliance with the framework established by the Encinitas General Plan, a specific plan in accordance with the framework established by the County General Plan, different locations for the Specific Plan regional commercial and golf course uses, and no project at all. Of the alternatives, "no project" is considered environmentally superior. When considering the others as a group, the redesign to reduce effects on sensitive resources is considered environmentally superior and is recommended for consideration by decisionmakers. Comparisons of the different alignments for Leucadia Boulevard and reduced Encinitas Creek floodplain encroachment to the Specific Plan are inconclusive. The other alternatives do not meet all of the project objectives. 1 -4 1.5 AREAS OF CONTROVERSY AND ISSUES TO BE RESOLVED Numerous issues have been raised by agencies and the public upon receiving notice of the project. The principal concerns are protection of sensitive biological resources on the site, the rarity of southern maritime chaparral onsite and in the region, severance of habitat by the extension of Leucadia Boulevard, preservation of wildlife corridors, disturbance of wetlands onsite, and offsite water quality effects on Batiquitos Lagoon. Additional primary concerns are preservation of agricultural lands, relationship to Quail Botanical Gardens, golf course use, regional commercial use, and recreational opportunities. Other major concerns are topographic alteration, visual quality, traffic circulation, and growth onsite and in the region. After analysis of these and other issues, impacts and mitigation measures have been identified. In addition, the redesign to reduce effects on sensitive resources alternative is recommended for consideration by decisionmakers. The choice among identified alternatives is yet to be resolved. 1.6 FINDINGS AND STATEMENT OF OVERRIDING CONSIDERATIONS Findings in accordance with California Code of Regulations Title 14, Div. 6.3 (CEQA Guidelines), Sec. 15091 will be necessary for approval of the project or any alternative which involves significant impacts. The possible findings are: (1) Changes or alterations have been required in, or incorporated into the project which avoid or substantially lessen the significant effects identified in the final EIR; (2) Such changes or alterations are within the responsibility and jurisdiction of another public agency and not the agency making the finding. Such changes have been adopted by such agency or can and should be adopted by such agency; and (3) Specific economic, social, or other considerations make infeasible the mitigation measures or project alternatives identified in the final EIR. Code Sec. 15093 notes that CEQA requires the decisionmaker to balance the benefits of a project against its unavoidable environmental risks in determining whether to approve the project. If project benefits out -weigh the unavoidable adverse effects, the adverse effects can be considered "acceptable." 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O W W C L L O m O) o W o m'pp u L O 1--1 r • H 7 w m O W O •r U O N _N N W 'O N W > A C N u N W c to > r u W W > C W W O W V N •r y y O N •r W C u� W 4 w 2 d W> ar N 7 O C r 0 N N O O W t 01 c WC O 7 L C0 ++rn m c � 41 0 m ccE a to ~ W u1p 41 W O to W 7 W W C W 0 a) m O O C V E V V E X O O w c W x 0 7 E c W W U U L W L W J •r W L i1 i.) b 7 a W N C O W u M a+ a+ r C N c V C v •C u (D LO v m O1 V N C c •o O) C 01 w E W V 0- W N 0) N O C N C W W V > V W Y- Z J Q v N U d V r W C W E W W C L L O m L • H 7 7 W N W J W W C •O] v E L V E O W In N t > 0 W V t a+ O W w 7 Of N C 2 W W V E d E E C O •V W O) N V M � E W W C 9L a v w Z W CL Vf C N O 8 8 L W 0 V c 6.• E N L L/ u 10 ~ U N E L W C L L W L O C1 T _ O L V OC 41 WW c C a C u c 0 U W Q C L q d v 7p $ N c W r I •M vD C � OV •r W O f O O CL o W O O r s w 41 E O C N O ) C N O Wu a J W • J J to J V w U >•.� v > W > a+ -u V 7 L W W — -� C u >> C •N O •N O > •N W U F •r U L= W V •r :3 4- C W Eo7 W'- 49 O) U O) L %n V X W N - U �p W O N W 4 F V u W Z Ol W V 1 -1% U) U aI W U •4 r-1 .G 7 A4 W N 0 N c C O W V Y 7 ++ +J +J +J O W W W W W 0) 41 O 4- W M \ V) W O C C C •C E W O) O) C) w 4J p H W y N N N Ot J L C H C H C H C �••� W W V J Q W q C C L Ot N W lu p y L o) L .+ 0 CL > W x +' C O W O N W j 2.0 PROJECT DESCRIPTION 2.1 LOCATION !The Encinitas Ranch Specific Plan area, Leucadia Boulevard alignment, and annexation area (project) are generally located in the northwestern sector of the City of Encinitas, San Diego County, California. This regional location is shown on Figure 2 -1, followed by the Encinitas and environs road system on Figure 2 -2. Encinitas is situated between the cities of Carlsbad and Solana Beach, along the coast about 25 miles north of the City of San Diego. The project area lies east of Interstate 5, south of La Costa Avenue and the Carlsbad city limits, north of Encinitas Boulevard, and west of E1 Camino Real. As can be seen on Figures 2 -3 and 2 -4, the Specific Plan area lies wholly within the City of Encinitas Ecke Sphere of Influence, with the Leucadia Boulevard alignment within both the City limits and sphere. This roadway alignment extends from I -5 easterly to the Specific Plan boundary (Encinitas city limits) and beyond through the plan area to E1 Camino Real. The area subject to annexation encompasses the entire Sphere of Influence to include the Specific Plan area, Olivenhain Municipal Water District parcel, YMCA /Sports Park properties, Leaf property, and Thornton property. 2.2 OBJECTIVES The Encinitas Ranch Specific Plan has been prepared under the authority granted to the City of Encinitas by the California Government Code, Title 7, Division 3, Articles 8 and 9. Sections 65450 and 65507. This plan is intended to provide for the orderly and efficient development of its respective Specific Plan area in accordance with provisions of the Encinitas General Plan. The Specific Plan establishes standards, procedures, and guidelines for development of various land uses including residential, commercial, mixed residential /commercial /office, school, golf course, agriculture, park, and open space together with circulation plan (element) roads and other essential public service support systems. All future tentative parcel maps, tentative maps, use permits, or other similar entitlements for properties located within the boundaries of the Specific Plan must be consistent with the regulations set forth in the plan and with all other City regulations. Furthermore, all regulations, conditions, and programs contained in the plan will be deemed separate, distinct, and independent provisions of the Encinitas Ranch Specific Plan. IThe Leucadia Boulevard Alignment is intended to provide for the orderly implementation of the City Circulation Plan in accordance with the provisions of the Encinitas General Plan. This alignment establishes a precise location for right -of -way, and physical parameters for improvements and new construction of the roadway. The alignment identifies intersections and access, and sets standards and guidelines for buffers including setbacks, landscaping, and noise attenuation. Annexation is intended to provide for orderly and efficient expansion of the City in accordance with provisions of the General Plan. The annexation area includes properties within the Specific Plan Boundaries as well as all other properties within the Ecke Sphere of Influence. Annexation will enable a full range of services to be provided and ensure that development of these properties occurs in accordance with General Plan policies and the City Growth Management Program. 2.3 DISCRETIONARY ACTIONS AND PERMITTING 2.3.1 CONCURRENT ACTIONS AND PERMITTING A number of discretionary actions must be taken in conjunction with an approval of the project. First and foremost are adoption of the Encinitas Ranch Specific Plan, Encinitas Specific Plan Zoning Ordinance with rezone request, and Encinitas Ranch Design Guidelines, as well as adoption of the Leucadia Boulevard Alignment 2 -1 I ORANGE COUNTY Oceanside Harbor Oceanside Buena Vista Lagoon Agua Hedionda Lagoon Carlsbad Batiquitos Lagoo)Bewh Leucad Enci Cardiff•by Sola Del Mar Pacific Ocean La Jolla Paeif¢ Baaeh Mission Bay Minion 113"0 Ocean Beach San Diego Point Loma Feet 0 20.000 40.000 0 2 4 8 Miles Figure 2 -1 Region Source: SANDAG (1991) RIVERSIDE COUNTY Rainbow Lake Wohilord '.ake Hodges L Rancho Bernardo C„ ! +f W .� g; I :,� . T. 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I r(.- �. • Al I ',,�' i 'I l - _ ti I 11 and approval of master conceptual otenta the map ifor uthe Spec f c Planadoptions may be apprarea. Amendments o of the 8 2 Encinitas G 8.8; eCirculationlElementc Policy including 223circulation Element P Circulation Element Circulation Plan Figure 21 Element Goal 5 and Policy 5.3; for classifications for extension, Bou cation of Via Cantebria extensionoin�Carlsbadn and Garden View n C -26; and Noise Element Policy 1.6. A Public related text change to page Facilities Financing Plan (Development Agreement) will also need approval. The s are last discretionarye actions in this serie including the Spec fic Plan parea and all other properties by Sphere of In Approval the City of Encinitas and Local Agency Formation Commission (LAFCO). App y Water of adjct t bo ndaries,1e andc Sanitary annexation of District Leu ca and d County Leucadia District Disti ultimate Service Area by the respective Districts and LAFCO may occur concurrently with, or after other annexation actions. 2.3.2 SUBSEQUENT ACTIONS AND PERMITTING After initial project approvals numerous pro ectltimplmentat ion. One actions action and permitting will be necessary before P (Development Agreement - approval of a public facilities financing program Preannexacellation ofrthe Williamson ecifiPlan contractnfor eparcels nin1Green" approval of can Valley. In addition, approval of an amendment to the Williamson Act contract for parcels supporting the golf course may be requested to accommodate this use. Subsequent City of Encinitas applications for the Specific aPlan area accordance in Table 2 -l. Precise plane will have to be prepared future for the South Mesa, East Saxony, and Quail with the Specific Plan in the Gardens East planning areas. Applicable tentative and parcel maps, use permits, for these and similar entitlements will also be necessary applicable permitting will also be necessary for developmwent ent of f the Thornton as. Such he property in the project area. Design review will be required for all development in the Specific Plan area and the Thornton property. Other related subsequent permitting for the entire project area will include grading, building, and similar construction specific actions. into the Eventually the Specific Plan, through its incorporation (Encinitas Local Coastal have to be reviewed and General Plan tal Program), approved by the Coastal Commission in compliance with the California Coastal Act. In the meantime a coastal development permit from the Coastal Commission will be required for development in the Specific Plan and greater project area. A U.S. Army Corps of Engineers, 404 permit will be required for alterations to wetlands of Encinitas Creek, its tributary, and other wetlands. A state Fish and Game 1600 permit will be necessary for alterations to wetlands of Encinitas Creek and its tributary, other USGS blueline streams, and elsewhere. A federal Section 4(d) or 10(a) permit will be required for any "takes" of the federal listed (threatened) California gnatcatcher. A memorandum of understanding will be necessary for any propagation and use as mitigation, of thet may the (endangered) Encinitas baccharis. Pollutant discharge 401 p er necessary in accordance with State Water Quality Control Board and /or Environmental Protection Agency water quality control requirements. 2.4 CHARACTERISTICS 2.4.1 ENCINITAS RANCH SPECIFIC PLAN Land Use Plans the Specific Plan is presented in the Encinitas Ranch A detailed description of Specific Plan prepared by T &B Planning Consultants (1993). Aspects of the 2 -6 Table 2 -1 City of Encinitas Application and Permit Requirements for Specific Plan Development PLanning Area Design Review' Tentative Map Use Permit I Precise Plant Zone Change 1. Quail Hollow East X X X3 2. North Mesa X X X4 X5 3. Sidonia East X X 4. West Saxony X X6 X7 5. East Saxony X 6. Quail Gardens East X 7. South Mesa X 8. Green VaLLey X8 X X9 Magdalena Ecke Park10 2 Design Review includes review of site plan and building elevations. Due to uncertainties as to the future configuration and location of the agricultural operations 3 a precise plan will be required subject to CAB and PC approval. Specific Plan allows up to 67 units at a maximum density of 10 du /ac in lieu of single family 4 adjacent to the golf course subject to approval of a zone change. Visitor Serving Lodging of up to 150 units is permitted on the northern edge of Magdalena Ecke 5 Park in lieu of single family subject to a Major Use Permit. Specific Plan allows up to 126 units at a maximum density of 10 du /ac in Lieu of single family 6 adjacent to Magdalena Ecke Park and golf course subject to approval of a zone change. 7 Depending on the uses proposed a tentative map application may be required. 8 Depending on the uses proposed a Use Permit may be required. Design Review is required for all future uses; Design Review for the regional commercial use is 9 required only to a level to ensure consistency with the Specific Plan standards. 10 Depending on the use proposed a Use Permit may be required. Under County ownership. 2 -7 description pertinent to a thorough analysis of potential environmental effects follows. The Encinitas Ranch Specific Plan is designed to allow continued agricultural use, while at the same time permitting residential, commercial, mixed -use, school, golf course, park, and open space uses on the 852.8 acre site. Because of unforeseeable conditions related to market and other conditions affecting agricultural operations, two scenarios for development called Land Use Plan A and Land Use Plan B have been prepared. Although most of the land uses and development standards are the same for both plans, there are some distinct differences. To facilitate descriptions of the two land use plans the Specific Plan area is divided into eight planning areas. These areas are shown on Figure 2 -5 and are named Quail Hollow East (map symbol - 1), North Mesa (map symbol - 2), Sidonia East (map symbol - 3), West Saxony (map symbol - 4), East Saxony (map symbol - 5), Quail Gardens East (map symbol - 6), South Mesa (map symbol - 7), and Green Valley (map symbol - 8). The Quail Hollow East, North Mesa, Sidonia East, West Saxony, and Green Valley planning areas are planned to a level allowing implementation through tentative map and other entitlements. The East Saxony, Quail Gardens East, and South Mesa planning areas will have to be precisely planned at a later date depending on the future configuration and location of agricultural operations. However, recreational uses may be implemented independently of a precise plan. The precise plans for these areas must indicate the location(s) of land designated as an agricultural zone, provide for other uses on the balance of the land, and be incorporated into the Specific Plan. Future precise plans may incorporate all or a portion of the uses identified in the Specific Plan. One or more precise plans may be submitted, but no plan can be less than 20 acres in the area affected by the precise plan. Land Use Plan A assumes that the agricultural zone will be located in the South Mesa planning area while Land Use Plan B has the agricultural zone in both the South Mesa and East Saxony planning areas. The Encinitas Ranch Specific Plan Zoning Ordinance assumes implementation of Land Use Plan A. This option is preferred by the Specific Plan sponsor because of anticipated agricultural production requirements. If Land Use Plan B is selected for implementation the Zoning Ordinance must be changed through a rezoning procedure in compliance with conditions set forth in the Ordinance. Agricultural uses are permitted by right by the Specific Plan and any areas except those designated as Open Space may be subdivided and developed for agricultural purposes without amendment of the plan or preparation of a precise plan. Agricultural uses are defined as including all aspects of research, development, propagation, finishing, distribution, and wholesale marketing together with associated functions. These uses may need a variety of structures including laboratories, greenhouses or other growing and production facilities, field nurseries, shade houses, packing and shipping facilities, offices, storage facilities, and employee housing as consistent with the Zoning Ordinance. Land Use Plan A Land Use Plan A is presented graphically on Figure 2 -6, with land use statistics listed in Table 2 -2. The Plan designates 134.1 acres for continued agricultural use, located in the South Mesa planning area. It is anticipated that the majority of agricultural activities will take place in large greenhouses. Secondary uses may include agricultural biotechnical and bioresearch laboratories and facilities. An 18 -hole golf course with club house facilities and driving range is located on 173.4 acres of the South Mesa, North Mesa, and Quail Hollow East planning areas. Nine holes and the club house are situated north of Leucadia Boulevard with the remaining nine holes south of this roadway. There are 116.4 acres supporting 377 single family dwellings. Of this total three units will be at a maximum gross density of 0.7 du /ac on 4.3 acres in the South Mesa planning area. Another 280 units will be at a density of 3.0 du /ac 2 -8 Table 2 -2 Specific Plan Land Use Plan A Summary Land Use Type Acreage ommerciaL /office Dwelling Unit Duelling Units (AC) Square Footage Density (DU) (SF) (DU /AC) Single Family Residential [total] [116.4] -- [3.2] [377] Single Family Residential 4.3 -- 0.7 3 Single Family Residential 93.4 -- 3.0 280 Single Family Residential 18.7 -- 5.0 94 Mixed Use [total] [87.3] [220,000] [30.0] [873] Green Valley [total] [34.6] [50,000] [25.0] [502] Multi - Family Residential 19.9 -- 25.0 502 Commercial /Office 3.9 50,000 -- -- Church /School 10.8 -- -- -- East Saxony [total] [39.7] [145,000] [20.0] [208] Multi - Family Residential 10.4 -- 20.0 208 Commercial /Office 14.8 145,000 -- -- QuaiL BotanicaL Expansion 14.5 -- -- -- West Saxony [total] [13.0] [25,000] [25.0] [163] Multi - Family Residential 6.5 -- 25.0 163 Commercial /Office 6.5 25,000 -- -- ELementary School 12.1 -- -- -- RegionaL Commercial Center 73.8 650.000 -- -- Golf Course (18 holes & club house) 173.4 -- - -- Agriculture 134.1 -- -- -- Ma dalena Ecke Community Park 29.8 -- -- -- Open Spacel CtotaL] [179.6] -- -- -- Natural Areas 135.7 -- -- -- Manufactured Slopes 14.6 -- - -- 'rails 3.5 -- -- -- :cinitas Creek/Tributary 25.8 -- -- -- Roads (circulation element) 46.3 -- -- -- Specific Plan 852.8 877 .j002 -- 1,2503 1 Includes natural areas, manufactured slo es adjacent to roads, trails outside p ) golf course, and 2 drainage /detention areas. 150 room hotel /inn will be permitted if a major use permit is approved pursuant to the Specific 3 3n in a portion of the North Mesa planning area. Up to 1385 duelling units will be permitted if a rezone is approved pursuant to the Specific Plan allowing a maximum multi - family density of 10 du /ac in portions of the Quail Hollow East and North Mesa planning areas. Source: T &B Planning Consultants (1993) 2 -9 OWN Ili t, ,1 { w „J 3: 3 YK: i i i i II lill �1 11 �t�11`tl 1�\ 1 y ANOXV S IS3 YINOaIS� All ✓sue.. ' , J �.i .� J AIM. 1tfS3W " H12J0N, qtr 1SV3 MOIIOH N 4 4J to ro to ro W b ro W to 3 4-) O >4 m EQ a a b 4 ro ro ro Im r-4 to W O O �t to r-1 � U a � • x ro cxd Dro U Zs •rt in FA Ci i7 r-1 A C! 44 -4 � -- ro •r♦ +i O 4J 4J •ri +J N q Rcr) r-4 ro k b N to fd O N 0 d a z W oa 0 0 a-4 of z W to En a ul H I O) N l4 U tT � rl O W En �1 11 �t�11`tl 1�\ 1 y ANOXV S IS3 YINOaIS� All ✓sue.. ' , J �.i .� J AIM. 1tfS3W " H12J0N, qtr 1SV3 MOIIOH N �j oot \ (£66T) s4us4TnsuoD fbuiuuETd 91Z :aoanos `d uuTd asn PuPrI 9 -Z ainbi3 I 3 1 "no3x-lw y �1 �_ � � 1 N - -_._ t� /� . -. •�, I. ',ru riao9sae �� \ �I f _ l - � s. III •II J ' J��I %. ___ ...J I �` � � 1 1 �� -. \I -�- 4 .� 1 • it f /� i i� /� _ � 133N1$NOINfI ` l )1141 / 35 �3YIW • � AIIWb- 131•�J� 10(,4'JS 1 \ 1 1 0o1 9GF zlW I �: A J � � � � < � I, � AnWr 3i Nr, • � or la � � �re9�i?t{ � � � � 1 � � srr I � � ��`I .. ��•�� _ � ,. - /. _ _ • '''�� ,,j Nogg ;�� o�� l F1 'JI ,�. . 1 �� ✓� �� iI _ \ �o i 1 Dv ,no o 319N.$ 1.30 055 \` _ �� ` �/ �Cl V10 01131 r _ I Fw 0[ I• �— f �i %� � L 006 orinoaC f y - a-• --- -° IJ 1 ___r_ H31N 3� 1 f %- • l _./ I _ p1 - \ dill._ 1 1 y �I b� wlob3Wwo F ) _I _� S � y_ -G-- = 111 / III i I i F � ovo \v 1\ \ II f � I ��: �YQ� raSwN `l - � � //� {` \\ \ • • - �zo r7rs �.3rNa 33e �" zF ,vIINH sa A aro'N 3�1's� i I a �x; N � 1 �^ )� W ob6 SE 104E — /�S�f - Vi W #- S \� IL/ '�� \ \• •— (�(f�(j�,IWr33lDN19 � �. (�. H \\ 1\`\\1 i I 1. /�' )� 11�•.b.( �. _\'�� __ o 3N��S3j Y2 IrN. ( �11 'Al '• l j\` I �'. � 1� `� I �, 0 w d I 1 1' 1 u located primarily in the North Mesa, Quail Hollow East, Sidonia East, and Quail Gardens East planning areas. There will be 94 units at a density of 5.0 du /ac on 18.7 acres in the East Saxony planning area. A 12.1 acre elementary school site is located in the East Saxony area at the intersection of Union Street and Saxony Road. Mixed uses are planned for 52.7 acres of the East and West Saxony planning areas with 13.0 acres west of Saxony Road designed to support community serving uses such as an amphitheater, theater, and /or museum. If these uses are not implemented, the area will develop with a mix of multi - family residential, commercial, and office uses. On the 39.7 acres east of Saxony Road a mix of multi - family residential, commercial, and office uses are planned together with a possible 14.5 acre expansion of Quail Botanical Gardens or other community oriented use. A 73.8 acre regional commercial center is planned in Green Valley. This and other uses in the planning area are shown on Figure 2 -7. There will be 34.6 acres of mixed uses developed in the manner of a village center combining commercial, office, and multi - family residential uses. Multi - family housing consisting of a mix of townhouses, apartments, and condominiums will also be located on 19.9 acres in this planning area. A church, day -care center, and other community oriented facilities may be included in the village center. There is a 25.8 acre linear greenbelt and recreation area adjacent to E1 Camino Real containing an open drainage channel for Encinitas Creek and its southern tributary, and a mix of passive and active recreational areas. The 29.8 acre Magdalena Ecke Park is designated as a Community Park to be maintained in a natural condition for passive recreational use. The 93.2 acre bluff system in Green Valley, as well as 24.2 acres of the bluff system and northwestern finger canyons in the Quail Hollow East, and 22.6 acres of the bluff and finger canyons in the North Mesa planning areas are also designated as natural open space. In Quail Gardens East, 6.6 acres along Quail Gardens Drive will function as linear open space for drainage purposes. Vehicle access is provided by an extension of Leucadia Boulevard easterly over the upper mesa and down through Green Valley to E1 Camino Real. In addition, Quail Gardens Drive is extended northerly, with an intersection at the Leucadia Boulevard extension, to Quail Hollow Drive on the northwest. Union Street is extended easterly to intersect with the Quail Gardens extension and on (Street A) into the South Mesa planning area. Via Cantebria is extended northerly down into Green Valley to the northern boundary of the site. There are intersections with a westerly extension of Garden View Road and the Leucadia Boulevard extension. There is also a connection point beyond Leucadia Boulevard for the extension of Via Cantebria offsite into Carlsbad. There is an additional access point (Woodley Road) planned from E1 Camino Real into Green Valley midway between Leucadia Boulevard and Garden View Road. A public recreational trail system interconnects open space throughout the Specific Plan area. Primary components consist of trails along the toe and top of the bluff along Green Valley. These trails are linked together with one cross trail through the bluff and another along Leucadia Boulevard. There also will be potential for a connecting trail through Magdalena Ecke Park. Land Use Plan B Land Use Plan B is presented graphically on Figure 2 -8, with land use statistics listed in Table 2 -3. Land Use Plan B assumes that agricultural uses will occupy 126.0 acres in the South Mesa, Quail Gardens East, and East Saxony planning areas. The golf course and club house facility are identical to that of Land Use Plan A. Single family residential development in the Quail Hollow East, North Mesa, and Sidonia East planning areas is also the same as in Land Use Plan A. The mixed -use development planned for West Saxony and various uses in Green Valley are also identical to that of Land Use Plan A. 2 -12 Table 2 -3 Specific Plan Land Use Plan B Summary Land Use Type Acreage (AC) Commercial /Office Square Footage Duelling Unit Density Dwelling Units (DU) (SF) (DU /AC) Single Family Residential [totaLl Single Family Residential Sin Le Famil y Residential [157.11 4.3 152.8 -- -- -- [2.93 0.7 3.0 [4611 3 458 Mixed Use [total] Green Valley [total] Multi - Family Residential Commercial /Office [47.63 [34.63 19.9 3.9 [75,0001 [50,0003 -- 50,000 [30.03 [25.01 25.0 -- [6651 [5023 502 Church /School West Saxony [total] Multi - Family Residential Commercial /Office 10.8 [13.03 6.5 6.5 -- [25,0003 -- 25,000 -- [25.03 25.0 -- [1633 163 Elementary School 10.0 -- -- Re ionaL Commercial Center 73.8 650,000 -- -- Community Use 17.2 145,000 -- -- Golf Course (18 holes & club house) 173.4 -- -- -- Agriculture 126.0 -- '- -- Ma dalena Ecke Community Park 29.8 -- -- Open Space [total] Natural Areas [170.33 129.1 -- -- -- '- __ Manufactured Slopes Trails 14.6 0.8 -- -- -- -- __ Encinitas Creek/Tributary 25.8 -- -' __ Roads (circulation element) 47.6 -- -' -- Specific Plan 852.8 870,0002 - 1,1263 1 Includes natural areas, manufactured slopes adjacent to roads, trails outside golf course, and 2 drainage /detention areas. A 150 room hotel /inn will be permitted if a major use permit is approved pursuant to the Specific 3 Plan in a portion of the North Mesa planning area. Up to 1261 duelling units will be permitted if a rezone is approved pursuant to the Specific Plan allowing a maximum multi - family density of 10 du /ac in portions of the Quail HoLLow East and North Mesa planning areas. Source: T &B Planning Consultants (1993) 2 -13 r L _ � !�✓ t,�i�� ' '�'�', 4�.��r t, .o,� �� ` ° L 1, L�''`�) '� � �� )�li �r V �� ; � �,1r I 7N,"T, h ,' r —'Vr' �,�h ' �•. -1' "� _ l'I' � "� � mil" "� A.,� i• y��_." ,.. �L�r}� F 1 � f 0 Tel IS if r)t '.� (iy�ii �,•, � V:��1•lq ()c•�9 ��btl �� r!a �U N � X11 c?1 '�! . ) .) ;) ,•) - ;_ �� ., -• "� ' ? � r � lam] )) .l ) ') )) •) �) �1 �l� �� w� ;� ^{ ,• JI,��7',� �O "• 7`W E.4 �l 1`l, •� 1 ,(r �w11+��' rl � LP 1 i `'(): c� - -- 1� �l �j ►1 z I w w 1� F�+"1 W W �ll 1� W W U U W O U z 0 w x 4J W O O N 10 N 4; Dot t' op 0 t OJOOL VIN TS sn 71� go, "as v I�33V,II5 N3d0 nose' II Il 051) 61! no OZ aw/na o c 11C Ed VUNIGISau W z z rxi m 9: ca ii r-i F4 --F i se ---- - -------- I l"s� A t' l v I El 1IN" OWN nal No� IVIIN i,�r�' - -- �r� - "�` 'I it )l Ln L J 3, t' op 0 t OJOOL VIN TS sn 71� go, "as v I�33V,II5 N3d0 nose' II Il 051) 61! no OZ aw/na o c 11C Ed VUNIGISau W z z rxi m 9: ca ii r-i F4 --F i se ---- - -------- I l"s� A t' l v I El 1IN" OWN nal No� IVIIN i,�r�' - -- �r� - "�` 'I it )l Ln EJV" CIO LU Z Z Zo < 0 E75 z < CL Lu > U Lu o 3� Z Q0 o > o < LU 0 a- > > 0 _j 0 M o QU Q < C �- LU a z Z Lu 0 . r) w 0 Z 0 < < <§ <!E o 6 U.J c) LU zo 0 0 D fx; < up 00 < Uj L-u Lu gb 5 =) 3:(.) 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It i ry as "I NC u 31 N 4J ro +-) ro as a r-I ED oa �+ CP (gip q-� U 'O b rn L)0 a�, N U w o ON N 0- U z Z 0 N w _j < _j P_ Z z < UJ .4Z LU U.j LLJ X Lu Lu 0 < CL z LU a_ 0 X < c) < C) ULU) LL < LL < D LU LU _3 D (D LLJ x z q 9 2 Cf) m U) LO . . . . . . . . . .... Ll U. C) LWU W Lu IAA� . . . . . . . . . . . . znW-H3 WNH'OEI l� 3 1 Ts r"rvm _.i"XMJS 113 A, 133 Ov % S6�- 06 lf 3 An' ? M-113 S ti so- so L2 MIS IV s so (d 4 ED 0 U 0) Ea Na CQ CN Q) �4 :j .10) 4 0 r-4 ul 0 < LL) LLJ U.j LLJ X 0 of LLJ 0 0 F- I D 0 < 0 < CL z LU a_ 0 . . . . . . . . . .... Ll U. C) LWU W Lu IAA� . . . . . . . . . . . . znW-H3 WNH'OEI l� 3 1 Ts r"rvm _.i"XMJS 113 A, 133 Ov % S6�- 06 lf 3 An' ? M-113 S ti so- so L2 MIS IV s so (d 4 ED 0 U 0) Ea Na CQ CN Q) �4 :j .10) 4 0 r-4 ul 0 0 co z Z 0 N z LLJ 0 JcC/) Lu CLI < c) LLJ LL < LU LLJ C) x U) C6 2 LL U.1 LU IV IX uds UZI ni j; SO, 1-4t ' � CJ%��'�'� s �� -�' lays- a3� -�._� .,;� ,��f, o-la, Z3� V I V:fs -SQ; so MIS U) 4j C: ru 43 ro 0 rd a) c)) Na (o CN E-4 C14 a) � u $4 0 N 1 C%4 _j < LL1 Lij LLJ 0 LLI o 0 C_V < (D 0 OL z LU n- 0 LL U.1 LU IV IX uds UZI ni j; SO, 1-4t ' � CJ%��'�'� s �� -�' lays- a3� -�._� .,;� ,��f, o-la, Z3� V I V:fs -SQ; so MIS U) 4j C: ru 43 ro 0 rd a) c)) Na (o CN E-4 C14 a) � u $4 0 N 1 C%4 In addition to the location and size of agricultural lands there are several other key differences between the two land use plans, all restricted to the East Saxony, Quail Gardens East, and South Mesa planning areas. In Land Use Plan B the single family residential uses of Land Use Plan A are relocated from the East Saxony area to the South Mesa area. No more than 207 single family detached dwelling units with an average gross density of 3.0 du /ac will be situated on 69.2 acres between the golf course and bluff top edge along Green Valley. The school site is also relocated from the East Saxony planning area to South Mesa. The Quail Gardens East planning area will contain 20 single family homes on 6.9 acres at a density of 3.0 du /ac. There are 17.2 acres of community uses planned on each side of Quail Gardens Drive. This community use area is designed to accommodate a variety of uses including the possible expansion of Quail Botanical Gardens, and a museum. Neighborhood and community serving commercial and office uses could also be developed in this mixed use area. Vehicle access for Land Use Plan B is the same as Land Use Plan A except that Union Street is not extended easterly and an additional street (Street B) is provided to connect the Quail Gardens Drive extension, by way of Street A. to the Via Cantebria extension in the South Mesa planning area. The public trail system for Land Use Plan B is essentially the same as that for Land Use Plan A. Optional Land Uses The Specific Plan allows portions of the North Mesa and Quail Hollow East planning areas to develop as multi - family residential at a gross density not to exceed 10 du /ac provided that a rezone is approved. Total dwelling units in the Specific Plan area cannot exceed 1385 with Land Use Plan A and 1261 with Land Use Plan B. The locations for multi - family dwellings are 12.6 acres in North Mesa north and northeast of Magdalena Ecke Park and 6.7 acres in Quail Hollow East south of Quail Gardens Drive. In addition, the Specific Plan allows a portion of the North Mesa planning area to develop as a 150 room hotel or inn provided a major use permit is approved. The 8.0 acre site is located north of Magdalena Ecke Park. Circulation Plan Traffic circulation within the Specific Plan area will be on roads in accordance with the Specific Plan Circulation Plan for Land Use Plans A and B shown on Figures 2 -9 and 2 -10. The circulation system for both Land Use Plans A and B includes extensions of Leucadia Boulevard, Quail Gardens Drive, Via Cantebria, and Garden View Road. Leucadia Boulevard is classified as a Major Arterial (four lanes). The right -of -way is 100 feet wide through the Sidonia East and a portion of the North Mesa planning areas and narrows to 70 feet for the balance of its extension through North Mesa. In Green Valley the right -of -way widens to 100 feet at its intersection with Via Cantebria and 128 feet near its intersection with E1 Camino Real. In certain locations there is a 30 foot wide Landscape Development Zone abutting each side of the right -of -way. Quail Gardens Drive is classified as an Augmented Local (two lanes) with a 60 foot wide right -of -way. Via Cantebria is classified as a Collector ( four lanes) with a 72 foot wide right -of -way to its intersection with Garden View Road. Its extension on to Leucadia Boulevard is as an Augmented Collector with a 90 foot wide right -of -way. There is a segment north of Leucadia Boulevard classified as a Collector with an 84 foot wide right -of -way to a connection point at the property boundary for an extension into Carlsbad. Garden View Road near E1 Camino Real is a Collector with an 84 foot wide right -of -way. Land Use Plan A includes an extension of Union Street as an Urban Local with a 60 foot right -of -way through the East Saxony planning area to intersect with Quail Gardens Drive. An additional yet to be named street (Street A) classified as an Urban Local provides access to the Quail Gardens East planning area. Land Use Plan B differs by not extending Union Street but providing access to the Quail Gardens East and South Mesa planning areas with two yet to be named streets 2 -16 (Street A and Street B) classified as Urban Local roadways with 60 foot wide right -of -ways. Street B intersects with the Via Cantebria extension. Grading Plan Specific Plan site grading will be in accordance with concept grading plans consistent with the grading shown underlying uses on Land Use Plans A and B. These grading plans accommodate the land uses, traffic circulation system, and surface drainage for the entire Specific Plan area. Grading plan development standards are provided to ensure minimal alteration of landform, aesthetically acceptable treatment of graded banks, proper drainage and erosion control, and appropriate landscaping. Zoning Ordinance The Encinitas Ranch Zoning Ordinance sets forth permitted uses and development standards for various land uses, known as zones, within the Specific Plan area. There are a total of seven zones, shown on Figures 2 -11 and 2 -12 for Land Use Plans A and B, with brief descriptions of each zone to follow. In addition to the zones is a Park and Recreation Overlay. The overlay is applied to any of the zones except Open Space, where it is restricted to the linear greenbelt /recreation area along the Encinitas Creek tributary paralleling E1 Camino Real. Examples of permitted uses are athletic playing fields, parks and playgrounds, botanical gardens, hiking and bicycle trails, and senior or youth facilities. Representative uses subject to a major use permit are amphitheater, museum, and theater. Agricultural and recreational uses are permitted in all zones except Open Space, subject to the development standards of the Agricultural Zone and provisions of the Park and Recreation Overlay. Interim Use Standards are included in the ordinance for the Green Valley, East Saxony, and West Saxony planning areas where such uses are either permitted, or allowed subject to a major use permit, prior to ultimate development. Examples of permitted uses are art and music festivals, fairs, farmer's market, outdoor flower market, and equestrian facilities. Representative uses through discretionary approval are parking lots, conference or cultural centers, and horticultural nurseries. Development standards apply primarily to building height limits and parking requirements. Outdoor Dining Standards for all Mixed Use and Commercial Zones complete the ordinance. Agricultural Zone (map symbol - AG) Permitted uses in the Agricultural Zone (AG Zone) include, but are not limited to agriculture, arboriculture, and floriculture operations, supporting facilities, associated biotechnical and biogenetic research, horticultural services, and community gardens. Examples of uses subject to major and minor use permits are farm employee housing, retail nurseries, and roadside sales. Development standards apply to such criteria as building heights, lot sizes, and building setbacks. Open Space Zone (map symbol - OS) This zone is intended to preserve biological and cultural resources intact with minimum human access. Permitted uses in the Open Space Zone (oS Zone) are restricted to hiking trails and paths. Bicycle trails and paths are allowed subject to a minor use permit. Other uses may be considered if they are substantially the same as trails and paths. Development standards such as width, and vertical grades are applied to trails and paths. Single Family Residential Zones (map symbols - ER -SFR1 & ER -SFR2) Permitted uses in Single Family Residential Zones (ER -SFRl & ER -SFR2 Zones) are primarily defined as dwelling units for one family. Examples of other permitted uses are educational institutions or schools, family day -care or group care, and private recreational facilities. Examples of uses allowed with a minor use 2 -17 permit are day -care and family -care, and a fire station. With a major use permit uses such as churches and synagogues, congregate care and convalescent homes, and public park and recreational facilities are allowed. In the ER -SFRl Zone only, cultural facilities such as museums and hotels and motels are allowed subject to a major use permit. Development standards apply to such criteria as building heights, lot sizes, building setbacks, auxiliary structures, walls and fences, parking, and open space buffers. Multi- Family Residential Zone (map symbol - ER -MFR) Examples of principal permitted uses in the Multi- Family Residential Zone (ER -MFR Zone) are apartment houses, condominiums, town - homes, and multi - family dwellings. Other uses such as schools, congregate care, family day -care, group care, and private recreational facilities are also permitted. With a minor use permit experimental housing and other uses such as day -care and family care are allowed. With a major use permit such uses as churches and synagogues, and public park and recreational facilities are allowed. Development standards apply to such criteria as building heights, lot sizes, building setbacks, auxiliary structures, walls and fences, parking, open space and private recreation facilities, landscaping, refuse collection, and open space buffers. Mixed Use Zones (map symbols - ER -MU1 & ER -MU2) These two Mixed Use Zones (ER -MU1 & ER -MU2 Zones) include a broad range of residential, office, and commercial uses. Examples of permitted uses are professional offices, apartment houses and condominiums, bank /savings and loan, retail sales, food and beverage services, hardware and sporting goods, and private fitness clubs. With a major use permit such uses as an amphitheater, bowling alleys, museums, and theaters are allowed. Development standards apply to such criteria as building heights, lot sizes, building setbacks, auxiliary structures, walls and fences, access and parking, landscaping, refuse collection, truck wells, and lighting. Commercial Zone (map symbol - ER -C) Principal permitted uses in the Commercial Zone (ER -C Zone) are commercial and include a wide range of activities. Most of the commercial uses mentioned for the mixed use zones are permitted as well as more intense uses such as building materials sales, home improvement centers, lumber yards, discount stores, drive - thru restaurants, gasoline stations, and theaters. With a minor use permit such uses as a bar /cocktail lounge, furniture manufacturing, and recording studios are allowed. Examples of uses allowed by major use permit are automobile repair, hotels and motels, radio and television studios, and textile manufacturing. Development standards apply to such criteria as building heights, lot sizes, building setbacks, auxiliary structures, walls and fences, access and parking, landscaping, refuse collection, truck wells, and lighting. Design Guidelines Design Guidelines for the Encinitas Ranch Specific Plan serve as a method to achieve a high quality, aesthetically cohesive community within the plan area. These guidelines provide for additional discretionary review for proposed development beyond the provisions of the Specific Plan and regulations of the Specific Plan Zoning Ordinance. The Guidelines are intended to ensure that new development will be of high quality that complements the character of existing development, while allowing flexibility for innovative and creative design. All new building, landscaping, exterior alterations, or construction projects, whether they require a permit or not, are subject to design review unless specifically exempted by the Specific Plan. Within the Design Guidelines are both general guidelines for the entire plan area and particular guidelines for Green Valley. The general guidelines cover site planning, architectural components, and landscaping. Site planning attention is focused on circulation, access, and parking. Architectural guidelines pertain 2 -22 to building massing, roofs, windows and doors, and building colors and materials. Landscaping guidelines include master landscape plans for Land Use Plans A and B, as well as landscape development zone and streetscape plantings, golf course plantings, edge conditions between different uses, circulation streetscenes, Specific Plan zones, entries, slope plantings and fuel modification, and a landscape planting palette. For Green Valley, particular guidelines for site planning, architecture, and landscaping are provided. The site planning guidelines cover the overall area, and the regional commercial center and mixed use development locations. General architectural guidelines are presented for all of Green Valley and for the regional commercial center and mixed use development. Landscaping guidelines focus on entry features and monumentation, landscape design elements, and a landscape planting palette. Phasing Plan Implementation of the Specific Plan will occur in two major phases, each of which are separated into sub - phases. The phasing plan is presented in Tables 2 -4 and 2 -5 depending on which land use plan is selected for implementation. Numbers in parenthesis correspond to the Specific Plan phase numbers. Phase 1 is identical for both land use plans and is divided into three successive sub - phases to commence shortly after necessary approvals and be completed within about 10 years. Phase lA involves construction of 475,000 square feet of the regional commercial center south of Leucadia Boulevard in Green Valley. A segment of Leucadia Boulevard adjacent to the center will be constructed to provide access. In addition, drainage improvements for the Encinitas Creek tributary along E1 Camino Real will be installed. Phase 1B follows with development of the remaining commercial space north of Leucadia Boulevard to complete the center. Concurrently, Leucadia Boulevard will be extended on through the Specific Plan area to connect to its existing alignment. An entrance (Woodley Road) between Leucadia Boulevard and Garden View Road from E1 Camino Real will also be constructed. With Phase 1C, mixed uses in the West Saxony planning area are implemented. This sub -phase may occur any time during Phase 1. Phase 2 consists of all other Specific Plan development. This phase is expected to begin after Phase 1 completion of the regional commercial center and Leucadia Boulevard extension, roughly 10 years after project approval. Phase 2 is also divided into sub - phases which may be implemented in or out of order, at any time during Phase 2. Phases 2A (2) and 2D (5) are the same for both Land Use Plans A and B. With 2A single family dwelling units and the golf course are developed in the Quail Hollow East, North Mesa, and South Mesa planning areas. With 2D additional single family dwelling units are built in the Quail Hollow East, Sidonia East and North Mesa planning areas. Phase 2B ( 3 ) for Land Use Plan A involves agricultural development in South Mesa. This phase also includes mixed uses in Green Valley. For Land Use Plan B, development in Green Valley is the same but there is less agricultural development in south Mesa. Phase 2C (4) for Land Use Plan A is limited to the East Saxony and Quail Gardens East planning areas. An elementary school may be built during this phase. For Land Use Plan B, development is limited to West Saxony, South Mesa and Quail Gardens East involving agricultural uses, single family dwellings, community use, and a possible elementary school. Roads and other infrastructure improvements associated with each phase will be constructed in accordance with traffic and other service demands in a logical progression. The Thornton property is not included in the Specific Plan Phasing Plan and its development may occur at any time after project approval in conjunction with, or after provision of access and other services. 2 -23 Table 2 -4 Specific Plan Phasing Plan A Summary Commercial /Office Dwell(nng)Units Land Use Type Planning Area Acreage (AC) Square Footage (SF) Phase 1A - Regional Commercial Center [81.8] [475,0007 -- [total] (south) 56.0 475,000 -- Regional Commercial Center Green Valley 25.8 Open Space Phase 1B - Re ional Commercial Center [17.87 [175,000] -_ [total] Center (north) Green Valle 17,8 175,000 R ional Commercial Phase 1C - West Saxony [13.0] [25,0007 [163] 163 [total] West Saxon 13.0 25,000 Mixed Use Phase 2A (2) - Golf Course -- C3] [184.47 CtotaL7 Quail Hollow East 173.4 Golf Course and Club House North Mesa South Mesa 4.3 -- 3 Single family Residential North Mesa 6.7 0 en S ce Phase 2B (3) - South Mesa /Green Valle [265.67 [50, 0001 [502] CtotaL7 South Mesa 134.1 50,000 502 Agriculture Green Valley 34.6 -- Mixed Use South Mesa 3 7 -- -- Open Space Green Valle 93 !) Phase 2C (4) - QuaiL Gardens East /East Saxony [95.3] [145,0007 [3517 94 [total] Single Family Residential East Saxony Gardens 18 7 East 16 7 -- 49 208 Quail 39 7 145,0 00 Mixed Use East Saxony East Saxony 12.1 Elementary School East Saxony 1.5 -- __ Open Space Quail Gardens East 6A Phase 2D (5) - Various Single Family Residential -- [231] [118.8] -- 231 [tota U Single Family Residential Qua il Hollow East 76 7 North Mesa Sidonia East -- Quail Hollow East 24.2 -- Open Space North Mesa 17.9 ALL Phases 29.8 Magdalena Ecke Community Park 46 3 -- __ Roads 852.8 870,000 1,250 Specific Plan T &B Planning Consultants (1993) Source: 2 -24 Table 2 -5 Specific Plan Phasing Plan B Summary Land Use Type Planning Area Acreage Commercial /Office Dwelling Units (AC) Square Footage (DU) (SF) Phase 1A - RegionaL Commercial Center [total] [81.8] [475,000] -- Regional Commercial Cen=(,oth) Gree n Valley 56.0 475,000 -- Open Space Green Valley 25.8 -- -- Phase 1B - RegionaL Commercial Center [total] [17.8] 1 [175,000] -- RegionaL Commercial Center (north) Green VaLLey 17.8 175,000 -- Phase 1C - West Saxony [total] [13.0] 1 [25,000] [163] Mixed Use West Saxony 13.0 25,000 163 Phase 2A (2) - Golf Course [total] [184.4] -- [3] Golf Course and Club House Quail Hollow East 173.4 -- -- North Mesa South Mesa Single Family Residential 4.3 -- 3 Open Space North Mesa 6.7 -- -- Phase 2B (3) - South Mesa /Green Valle [total] [187.6] [50,000] [502] Agriculture South Mesa 58.8 -- -- Mixed Use Green Valley 34.6 50,000 502 Open Space South Mesa 1.0 -- -- Green VaLLey 93.2 -- -- Phase 2C (4) - Quail Gardens East /East Saxony [total] [172.0] -- [227] Agriculture Quail Gardens East 67.2 -- -- Single Family Residential Quail Gardens East 6.9 -- 20 West Saxony 69.2 207 Community Use Quail Gardens East 9.4 -- -- East Saxony 7.8 -- -- Elementary School South Mesa 10.0 -- -- Open Space Quail Gardens East 1.5 -- -- Phase 2D (5) - Various Sin Le Famil y Residential [total] [118.8] -- [231] Single Family Residential Quail Hollow East 45.2 -- 136 North Mesa Sidonia East 31.5 95 Open Space Quail Hollow East 24.2 -- -- North Mesa 17.9 -- ALL Phases Magdalena Ecke Community Park 29.8 -- -- Roads 47.6 -- -- Specific Plan 1 1 852.8 870,000 1,256 Source: T &B Planning Consultants (1993) 2 -25 Public Facilities Financing Plan A detailed Public Facilities Financing Plan, or Development Agreement (Preannexation Agreement) must be prepared prior to development to implement the improvements and programs of the Specific Plan. A financing program in support of the plan will analyze methods to finance infrastructure and develop a process for enacting financing methods. 2.4.2 LEUCADIA BOULEVARD ALIGNMENT Alignment A detailed alignment for the Leucadia Boulevard improvements and extension has been prepared by Leedshill - Herkenhoff (1993). The approximate 9470 feet (1.8 miles) Leucadia Boulevard alignment is divided into three major segments. The western segment includes the existing roadway from the I -5 interchange to its intersection with Sidonia Street at the Specific Plan boundary. On the upper mesa the middle segment extends through the Specific Plan Sidonia East and North Mesa Planning areas to the bluff top edge. The eastern segment then descends into Green Valley to intersect with E1 Camino Real at Olivenhain Road. As shown on Figure 2 -13, the western segment runs a linear distance of about 3410 feet from the I -5 north bound ramps to Sidonia Street. Right -of -way width varies from 126 to 140 feet. There are two lanes of pavement 32 feet wide in each direction divided by an eight foot wide landscaped median. The pavement will be bounded by curbs and sidewalks. Urania Avenue on the north is realigned to the west to intersect directly with Clark Avenue. The northern leg of Saxony Road is realigned to the east to directly match its southern leg. Several existing intersections will be eliminated and the streets terminated in cul -de -sacs. On the south these streets are La Mirada Avenue, Del Riego Avenue, Del Rio Avenue, Eugene Avenue, Passifloria Avenue, and Sidonia Street. On the north the cul -de- sacs are Passifloria Avenue and Sidonia Street. The middle segment, shown on Figure 2 -14, runs a linear distance of approximately 2600 feet from Sidonia Street through the Specific Plan area to the bluff edge. The boulevard right -of -way is mostly 132 feet wide but narrows to 128 feet where the bluff cut begins. There are two lanes paved to 32 feet in width in both directions separated by an eight foot wide landscaped median. There will be curbs and sidewalks on each side of the roadway. Distance for the eastern segment shown on Figure 2 -15 is about 3460 feet from the bluff top to E1 Camino Real. Right -of -way through the bluff cut is 128 feet wide with two lanes paved to 32 feet in each direction separated by a four foot wide median. A pedestrian path will meander along the roadway in this location. There will be a golf cart overpass near the bluff top and a wildlife crossing above the roadway in the bluff area. The right -of -way widens to 160 feet at the intersection with Via Cantebria on the valley floor then continues at 170 feet to E1 Camino Real. East and west bound lanes are paved to 46 feet with a 24 foot wide landscaped median in this location. Phasing The eastern segment of Leucadia Boulevard adjacent to the regional commercial center in Green Valley will be constructed during Phase lA of Specific Plan Phasing Plan. With completion of Phase 1B of the Specific Plan the boulevard will be extended up onto the mesa top and connected to the existing segment east of Sidonia Street. Improvements to the existing segment of Leucadia Boulevard between I -5 and Sidonia Street will be constructed after this connection is made and traffic volumes warrant implementation. 2.4.3 ANNEXATION AREA The annexation area is the entire 907.8 acre City of Encinitas Ecke Sphere of Influence and is shown on the previously presented Figure 2.3. This area includes all properties within the 852.8 acre Encinitas Ranch Specific Plan 2 -26 boundaries, as well as the 2.7 acre Olivenhain Municipal Water District reservoir site on the upper mesa, the 15.0 acre Magdalena Ecke Family YMCA and adjoining Paul Ecke Sports Park west of Saxony Road, the 2.5 acre Leaf property near the terminus of Quail Gardens Drive, and the 40 acre Thornton property to the southeast of the plan area. Locations of these properties can be found on the previously presented Figure 2 -4. The YMCA and Sports Park have previously been given an Encinitas General Plan designation and Zoning Code classification (prezoning) of Public /Semi - Public. These two properties are almost entirely developed with buildings, parking lots, and outdoor sports fields for use by YMCA members and the public. Access is by driveways from Saxony Road. The Thornton property has been previously designated Residential [2.01 -3.00 Units /Acre] and classified (prezoned) Residential 3 (R -3) for single family residential use. This property is used for agricultural purposes and could support up to 120 dwellings. Access will be provided by connection to the Specific Plan street system (Street B). The Leaf property will be given an Encinitas General Plan designation of Residential [0.51 -1.00 Units /Acre] and Zoning Code classification (prezoning) of Rural Residential 1 [RR -1]. This property is developed as a residence and sculpture studio and could support two dwelling units. Access will be provided from the extension of Quail Gardens Drive. The Olivenhain Municipal Water District parcel will be given a General Plan designation and Zoning Code classification (prezoning) of Public /Semi - Public. 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J M O\ O\ r-1 W D O 0 4J PO CP $4 (d a U) x •'i N 1 ro 91 1 Ul •4 •11 N $44z o � a V, W �1 U -+ O W t/1 0 M 1 N M I N o � � � � L�r EL i " ti � , � p— _ fie• �!`% �� 1� )��' / � � � \1 11` 11 \1 4 1 1 I \ 1 , 1 , I 1 I _ I —100% I 1 1 i-"Z 1 1 I � 1 �I _ 1 D 1 1 �I 1 1 1 I 1 'I �I �I 1� V I' 1 1 1 11 �\II 1� 11 1 1 I 1 I' �I �I I 1 I I 1 1 1 1 1 I 1 '1 I �t 1� 1 wI. d 1ba �1Nd `' d N 1, ' 1 1 .. Ji I II 1 I� t ya a wu5 . � 1 r �.•-Y _._ - ids �_„.. . t a4s y�. s �y6 . �I ttl � pOq N 4J En rt� a'Aw Ln H Q) 14 W M ON 44 44 O $4 Ul x I r-I ...I to W N a ui O L1 O U) N M I N 3.0 ENVIRONMENTAL SETTING 3.1 VICINITY The project vicinity includes the Encinitas communities of Leucadia, Old Encinitas, and New Encinitas and the Carlsbad communities of Green Valley and La Costa Southwest. Locations for these communities are shown on the previously presented Figure 2 -3. An account of the natural and man -made features of the vicinity based on a description of the resources of the Encinitas region in the Encinitas General Plan Environmental Impact Report, Master Environmental Assessment (EIR /MEA) by Cotton/ Bel and /Associates and Westec Services (1987) follows. 3.1.1 GEOLOGY AND SOILS Underlying geologic formations consist of alluvium, Quaternary Terrace Deposits, and Eocene Marine Sedimentary Rocks. Several minor inferred trace faults have been mapped along the coastal bluffs, the south shore of Batiquitos Lagoon, and Encinitas Creek. Soil associations consist of Marina - Chesterton, Salinas - Corralitos, and Las Flores - Huerhuero. These soils are suitable for productive agriculture. 3.1.2 TOPOGRAPHY AND DRAINAGE Topography is characterized by marine terraces, or mesas, in the west and rolling hills in the east. Canyons bisecting the vicinity are Indian Head (Saxony) and Green Valley in the north opening to Batiquitos Lagoon, Encinitas Creek canyon extending from Green Valley to the east, and Cottonwood Creek canyon in the south opening to the beach. Elevations range from about 15 feet Mean Sea Level (MSL) in lower Green Valley to 400 feet MSL atop the mesa above the valley. Steep slopes are found primarily on the bluffs defining the western limits of Green Valley, the bluffs along the southern edge of Batiquitos Lagoon, and the walls of Indian Head, Cottonwood Creek, and Encinitas Creek canyons. Drainage is to Indian Head and Encinitas creeks northerly to Batiquitos Lagoon, or to Cottonwood Creek westerly to the Pacific Ocean. 3.1.3 BIOLOGICAL RESOURCES Native vegetation is well represented in relatively large contiguous blocks on bluffs, in canyons, and along major drainages. Southern maritime chaparral is found on the inland bluffs along the west side of Green Valley and the south wall of Encinitas Creek canyon. Southern mixed chaparral is located on the southern bluffs of Batiquitos Lagoon. Coastal sage scrub occurs in Indian Head canyon and small canyons opening to Batiquitos Lagoon. There is riparian wetland along Indian Head and Encinitas creeks and coastal wetland around Batiquitos Lagoon. These plant communities provide sensitive habitat and all but the southern mixed chaparral are considered sensitive in their own right. Sensitive plants noted in the vicinity include California adolphia, wart - stemmed ceanothus, mesa clubmoss, western dichondra, and Encinitas baccharis. Probable sensitive animals include San Diego horned lizard, orange throated whip -tail, California black - tailed gnatcatcher, and cactus wren. 3.1.4 CULTURAL RESOURCES AND PALEONTOLOGY Numerous archaeology sites including camps, lithic scatters, and midden have been recorded around Batiquitos Lagoon and on mesa tops near drainages. The first house in the Encinitas community was built in 1881. In the early 1920's the Ecke and other families began growing flowers in Encinitas and Leucadia. Historical structures, primarily represented by houses, still stand in the vicinity. A paleontological site yielding marine fossils is recorded in the coastal sector just south of Batiquitos Lagoon. Quaternary alluvium and terrace deposits, and Eocene marine sedimentary rocks underlying the vicinity have potential for paleontological resources. 3 -1 3.1.5 LAND USE According to a 1987 inventory, in Leucadia 1059.4 acres (49 %) of the 2145.1 acre community are cavoted to residential uses. There are 280.9 acres (13 %) and 559.9 acres (26 %) respectively (39 %) in agricultural use or undeveloped. Fifty acres (2%) are devoted to commercial uses. Open space accounts for 32.5 acres (2 %) of the area. The residential neighborhoods are found primarily on mesas in the western part of the community. Agricultural greenhouses and nurseries are scattered throughout Leucadia with the major floricultural operations including greenhouses and floricultural fields on the eastern mesa and in Green Valley. The undeveloped land is mostly on the bluffs of Green Valley and Batiquitos Lagoon and in Indian Head Canyon. Commercial uses are concentrated along Highway 101 near the beach. In Old Encinitas 736.6 acres (46 %) of the 1598.7 acre community are residential. Of the total acreage, 173.6 acres (11 %) are in agriculture and 146.5 acres are undeveloped (9 %). Commercial uses account for 151.5 acres (9 %) of the community. There are 84.7 acres (5 %) of open space. Residential neighborhoods are widespread with some greenhouses, nurseries, and undeveloped land scattered throughout. The commercial uses are concentrated along Highway 101 and Encinitas Boulevard. New " cinitas is primarily a residential community with 1436.4 acres (65 %) of its 22_ acres in these uses. There are 65.6 acres (3%) in agricultural use while 183 __,res (8%) lie undeveloped. There are 163.3 acres (7%) of commercial land and 285.2 acres (13 %) of open space. Commercial uses are located almost entirely along E1 Camino Real and Encinitas Boulevard. Agricultural land is primarily restricted to Green Valley with undeveloped land in the north and south along E1 Camino Real. The Carlsbad community of Southwest La Costa consists of residential neighborhoods, undeveloped land of Arroyo La Costa to the east of El Camino Real, and some commercial uses in northern Green Valley along E1 Camino Real. The Carlsbad Green Valley community is devoted to field floriculture on the valley floor with the bluff undeveloped. 3.1.6 TRANSPORTATION AND PUBLIC SERVICES Main north and south vehicle transportation corridors through the vicinity are Highway 101, Interstate 5, and E1 Camino Real. Main east and west corridors are La Costa Avenue, and Encinitas Boulevard. Other important north and south streets in the vicinity include Vulcan Avenue, Saxony Road, and Via Cantebria. Important east -west streets are Leucadia Boulevard, Olivenhain Road, Garden View Road, Via Montoro, Mountain Vista Drive, and Via Molena. A full range of urban public services is provided in the vicinity by the cities of Encinitas and Carlsbad and various special districts. 3.1.7 POTENTIAL FUTURE CONDITIONS The potential future conditions of the Encinitas communities in the vicinity are determined by goals and policies of the Encinitas General Plan (City of Encinitas, 1989). In Leucadia and its Sphere of Influence area, 2205 acres, or 75% of the 2953 acre community are planned for residential uses. Agricultural use is anticipated on 451 acres (15 %) of the community area. Ecological resources, open space, and parks are expected to constitute 91 acres (3 %) of the area. Eighty -four acres (3 %) are designated for commercial uses. According to the General Plan the majority of the community will remain predominantly residential with commercial uses along the Highway 101 corridor and at the Leucadia Boulevard /I -5 interchange. Vacant land and greenhouses throughout the community will be developed in residential uses. Land preserved for agriculture is anticipated to be located in the east portion of the community. Steep slopes in Indian Head canyon and on bluffs of Green Valley and Batiquitos Lagoon will be retained in natural open space. Leucadia Boulevard (Major /4 Lanes) is planned to be extended through to connect to Olivenhain Road. 3 -2 Quail Gardens Drive (Augmented Local /2 Lanes) and Vii Cantebria (Major /4 Lanes) are planned to be extended to the north. In Old Encinitas and its Sphere area, 1054 acres (60 %) of the 1656 acre community are planned for residential uses. Commercial uses are planned to occupy 180 acres (11 %) of the community area. Twenty -nine acres (2%) are designated for light industrial use. Ecological resources, open space, and parks are expected to constitute 96 acres (6%) of the community. New development is anticipated to be minimal and with most of it occurring as infill. There will be two distinct commercial districts in the same location as existing commercial uses along Highway 101 and Encinitas Boulevard. Light industrial use will be concentrated south of Encinitas Boulevard at Westlake Street. Open space will be primarily found in parks in the area. In New Encinitas and its Sphere, 1864 acres (78 %) of the 2413 acre community are planned for residential uses. Two hundred forty -three acres (10 %) of the community are designated for commercial uses. Light industrial use is planned to constitute 55 acres (2 %) of the community area. Ecological resources, open space, and parks are expected to occupy 145 acres (6%) of the area. Overall, land use will remain as it presently exists with some infill. Commercial uses will be concentrated along E1 Camino _Real and Encinitas Boulevard. The light industrial land will be at the southeast corner of E1 Camino Real and Olivenhain Road. Open space will be mostly in the Encinitas Creek corridor and on nearby bluffs, in the major power transmission easement, and in parks. The City of Carlsbad General Plan Land Use Map (Planning Department, 1990) indicates the potential future conditions for both the Southwest La Costa and Green Valley communities. Southwest La Costa is planned to remain predominantly residential with the Arroyo La Costa neighborhood developed in these uses. Steep sloped areas along E1 Camino Real and riparian wetlands in Arroyo La Costa are designated as open space. Calle Barcelona (Secondary Arterial /4 Lanes) is planned to be extended through Arroyo La Costa. Green Valley is designated for community commercial, professional, and residential uses. 3.2 REGION The project region encompasses the vicinity and greater Encinitas area as shown on the previously presented Figures 2 -1 and 2 -3. A summary of the resources of the Encinitas region based on a description provided in the Encinitas General Plan EIR /MEA by Cotton /Beland /Associates and Westec Services (1987) follows. 3.2.1 GEOLOGY AND SOILS The majority of the area lies on marine terraces of the coastal plains province of the Peninsular Ranges. Geologic formations include rocks ranging in age from the Jurassic to Quaternary periods, with the older Jurassic material in the northeastern uplands and the younger materials along the coast. Mapped lithologic units are alluvium, Quaternary Terrace Deposits, Eocene Marine Sedimentary Rocks, and Undifferentiated Cretaceous Granitics. Major fault zones affecting the region include San Jacinto, Elsinore, San Andreas, Rose Canyon, and four off - shore. Several inferred minor fault traces are mapped in the Encinitas area. There are four soil associations in the area with the Marina - Chesterton along the coast, the Salinas -Corral itos in major coastal valleys, the Las Flores - Huerhuero in the inland valley, and Exchequer -San Miguel in the northeastern uplands. These soils are well suited to agricultural production. 3.2.2 TOPOGRAPHY AND DRAINAGE Topography of the region is characterized by steep coastal bluffs, fairly level marine terraces, or mesas, progressing inland to rolling hills, and steep foothills in the eastern and northeastern uplands. There are two primary canyon systems with Green Valley opening into Batiquitos Lagoon in the north and Lux canyon opening into the San Elijo Lagoon in the south. Major valleys include those surrounding the lagoons, and the Olivenhain Valley in the east. Elevations 3 -3 range from sea level along the beaches to approximately 960 feet MSL atop the foothills. Steep slopes occur primarily along coastal and inland bluffs, canyon and valley walls, and northeastern foothills. Drainage is into Encinitas and San Marcos creeks and Batiquitos Lagoon in the north, and Escondido Creek and San Elijo Lagoon in the south. 3.2.3 BIOLOGICAL RESOURCES Although much of Encinitas is developed, large blocks of undisturbed native vegetation exists around the lagoons, along major drainages, on steep slopes of coastal and inland bluffs, and on northeastern foothills. Seven categories of natural vegetation have been mapped including southern maritime chaparral, mixed chaparral, coastal sage scrub, coastal and riparian wetlands, riparian woodland, and eucalyptus woodland. All but the eucalyptus woodland provide sensitive habitat. Southern maritime chaparral is restricted to the coastal fog belt between Carlsbad and Torrey Pines State Reserve. Coastal and riparian wetlands are very limited in the region. Twenty -nine sensitive plant species and 65 sensitive animal species are known to, or probably occur in the area. 3.2.4 CULTURAL RESOURCES AND PALEONTOLOGY Prehistoric use of the region is evidenced by numerous archaeology sites associated with the San Dieguito and La Jolla peoples dating back 9000 years. Representative site types are villages, campsites, lithic scatters, and middens. Historic use dates back to visits by Spanish explorers in 1769. The Los Encinitos Rancho was established soon thereafter, and in 1884 the Colony of Olivenhain was created by German emigrants. The coastal locales began to develop around 1880 with the coming of the railroad. Floriculture became a dominant agricultural activity near the coast in the early 19201x. Standing historical structures range from houses and outbuildings of the 1880's to residential and business structures with various architectural styles of the early 19001x. Distribution of paleontological resources in the Encinitas area is dependent on locations of geologic formations in which fossils have been preserved. Formations known to be fossiliferous are Quaternary alluvium and terrace deposits, Eocene marine sedimentary rocks, undifferentiated Cretaceous granitics, and Jurassic Santiago Peak Volcanics. 3.2.5 LAND USE According to a 1987 inventory, the total land area of Encinitas 13,000 acres, or 20.62 square miles. Of this total, 11,413 acres (17.8 square miles) are within the incorporated boundaries while 1783 acres (2.8 square miles) are within the City's sphere of influence. Residential land uses account for approximately 41% of the total land area. Commercial, industrial, and public uses account for about 3 %, 0.1 %, and 3% respectively. Land devoted to agricultural production totals 1538.3 acres (12 %) of Encinitas while undeveloped natural lands account for 3571.7 acres (27 %) of the area. 3.2.6 TRANSPORTATION AND PUBLIC SERVICES Main north and south vehicle transportation corridors in and through Encinitas are Highway 101, Interstate 5, and E1 Camino Real. Main east and west corridors are La Costa Avenue, Encinitas Boulevard, and Manchester Avenue. Amtrack provides passenger rail service between San Diego and Los Angeles through Encinitas with nearby stations in Oceanside and Del Mar. Complete urban public services are available in the region and provided by the City of Encinitas and various special districts. 3.2.7 POTENTIAL FUTURE CONDITIONS Goals and policies of the Encinitas General Plan determine the potential future conditions of the region. The City of Encinitas will continue to be primarily residential with 10,264 acres, or 76% of the 13,573 acre area planned for these 3 -4 uses. Five hundred ninety -four acres (4 %) are planned for commercial uses while 84 acres (1 %) are designated for light industrial use. Four hundred fifty -one acres (3%) are expected to be preserved for agriculture and 1326 acres (10 %) set aside for ecological resources, open space, and parks. Commercial uses will be concentrated along Highway 101, Encinitas Boulevard, and E1 Camino Real. Light industrial use will be at two locations, one at Encinitas Boulevard and Westlake Street and the other at E1 Camino Real and olivenhain Road. The Agricultural preserve is anticipated in the eastern sector of the Leucadia community. Open space will be found along the beach, around San Elijo and Batiquitos lagoons, along Escondido and Encinitas creeks, on bluffs of Green Valley and Lux Canyon, in Indian Head canyon, and on foothills in the east. Certain main transportation corridors will be upgraded and Leucadia Boulevard extended through Leucadia. 3.2.8 RARE OR UNIQUE RESOURCES Although not confined solely to the Encinitas area, a number of rare or unique environmental resources in the region could be affected by project implementation. These resources are steep inland bluffs; the Encinitas Creek, Indian Head, and Batiquitos Lagoon drainages; southern maritime chaparral, coastal sage scrub, scrub oak chaparral, and riparian and wetland habitats; Encinitas baccharis, Del Mar sand aster, wart - stemmed ceanothus, Del Mar manzanita, summer- holly, Nuttall's scrub oak, Palmer's grappling -hook, ashy spike -moss, western dichondra, and California adolphia plant species; orangethroat whiptail, coastal California gnatcatcher, Cooper's hawk, southern California rufous- crowned sparrow, and California horned lark animal species; two coastal archaeology sites and five historical sites; a large productive block of floricultural land; and extensive contiguous natural habitat. 3.3 GENERAL AND REGIONAL PLAN CONSISTENCY 3.3.1 GENERAL PLAN A number of inconsistencies with certain Encinitas General Plan goals and policies have been identified. They are the Circulation Element Circulation Plan classifications for Leucadia Boulevard (Major) and Via Cantebria (Major) extensions and the location of the Garden View Road extension (south of Post Office site); and Land Use and Circulation Element goals and policies particular to the specific plan area (LU 8.8/25,000 ADT ceiling) and Leucadia Boulevard improvements (C 5 /Major classification). Other inconsistencies with General Plan city wide goals and policies are for Land Use (LU 8.2 /floodplain intrusion, LU 8.5 /steep slope encroachment, and LU 8.6 /significant natural features); Housing (H 3.11 /steep slope, canyon, and floodplain encroachment); Resource Management (RM 4.9 /floodplain intrusion, RM 9.9 /natural drainage preservation, RM 10.1 /sensitive vegetation on steep slopes preservation, and RM 10.5 /contiguous sensitive vegetation preservation); and Noise (N 1.6 /mitigation requirements). 3.3.2 REGIONAL PLANS State Implementation Plan The State Implementation Plan (SIP) and Regional Air Quality Strategy (RAQS) have been developed by the San Diego County Air Pollution Control District (APCD) to address San Diego's nonattainment status for criteria pollutants under the federal and state Clean Air Acts. The 1991 Draft RAQS lists methods to control emissions. The project is generally consistent with the RAQS. However, the Specific Plan will result in a slightly larger population and vehicle trip volume than previously anticipated for buildout of the Encinitas General Plan. Although there will be increased vehicle emissions both locally and in the San Diego air basin, they are not of the magnitude to necessitate a revision of RAQS control methods or hinder efforts to achieve attainment. 3 -5 Regional Transportation Plan The San Diego Association of Governments (SANDAG) 1990 Regional Transportation Plan is a set of policies, plans and programs to guide the effective coordination and orderly programming of transportation improvements among local, regional, state, and federal agencies. It addresses major transportation issues, transportation goals and objectives, policies, and specific actions. The project is consistent with the plan. Of particular importance is the extension of Leucadia Boulevard as a planned section of the significant regional arterial system. In addition, the project is responsive to other pertinent aspects of the Highway Element and other applicable elements of the plan. Level of Service (LOS) policies are established through the regional Congestion Management Program (CMP). The CMP only applies to regional arterial circulation roads. Within the City of Encinitas these arterial roads are E1 Camino Real, Olivenhain Road, and Manchester Avenue between I -5 and E1 Camino Real. Under the CMP a Deficiency Plan is required for any road segment that falls below LOS D. With Specific Plan generated traffic volumes and no extension of Via Cantebria into Carlsbad the segment of E1 Camino Real between Garden View Road and Mountain Vista Drive at 63,000 ADT falls below LOS D (60,000 ADT) as defined by the Encinitas General Plan (Circulation Element Table 3, pg C -23). Under this circumstance a Deficiency Plan will be required if the project is approved. With the Specific Plan and extension of Via Cantebria into Carlsbad, this segment of E1 Camino Real will carry 60,000 ADT and no Deficiency Plan will be necessary. Natural Communities Conservation Planning Program In response to the California Natural Community Conservation Act of 1991, the City of Encinitas has agreed to participate in the Natural Community Conservation Planning /Coastal Sage Scrub (NCCP /CSS) program. The program is aimed at long- term conservation of native animal and plant species, and their habitats in areas large enough to ensure their continued viability. In north San Diego County the program is directed toward a multi - jurisdictional effort to develop the Multiple Habitat Conservation Plan (MHCP). To date, mapping of natural habitat in the subregion and an assessment of habitat quality has been completed. Habitat ownership and development status is now being investigated. Upon completion of this effort feasible locations and size of habitat areas for preservation will be identified. The Specific Plan area is included on MHCP habitat maps. Project technical biological data will be submitted to the MHCP to provide verification and further detail to previously collected MHCP information. The Specific Plan includes the majority of mapped natural vegetation on the site in large contiguous blocks of open space. These blocks are also situated to allow connectivity with offsite areas supporting similar habitat. The project is thereby consistent with the MHCP in its interim state and does not preclude completion of the MRCP in accordance with its mission. 3 -6 4.0 ENVIRONMENTAL IMPACT ANALYSIS 4.1 GEOLOGY AND SOILS A limited geotechnical evaluation of the project area has been conducted by Ninyo & Moore (1992). The evaluation includes a review of pertinent geologic literature, geologic reconnaissance and mapping of the study area, engineering and geotechnical analysis of the data obtained, and a report of findings, conclusions and recommendations. A copy of the report, labeled Appendix A, is included with other technical appendices to this document. Its content is summarized in the following discussion. 4.1.1 EXISTING CONDITIONS Geologic Setting The study area is situated in the coastal section of the Peninsular Ranges Geomorphic Province. This geomorphic province extends from the Transverse Ranges and Los Angeles Basin south to the Mexican border and beyond. Generally, the province consists of rugged mountains underlain by Mesozoic igneous and metamorphic rocks to the east, and a dissected coastal plain underlain by Cenozoic sediments to the west. Geologic Units The study area is underlain by Eocene sedimentary formational material and Quaternary terrace deposits. These geologic units are overlain by surficial deposits consisting of fill, colluvium, and alluvium. No deep- seated landslides have been identified within the site. Two landslides have been mapped near the northwest boundary of the study area. Geologic units are mapped on Figure 4 -1. A brief description of these units follows. Fills (map symbol - af) Fills on the site consist of agricultural fills, fills to form reservoirs or alter drainage courses, fills as stockpiles, and roadway embankments. The fills appear to generally be derived from on -site materials. Topsoil/colluvium (not mapped) Topsoil and colluvium are present in many undisturbed areas of the site. These materials consist of medium to dark brown clayey sand and sandy clay. Alluvium (map symbol - Qal) Alluvium is present in Green Valley and in many small drainage courses in the study area. This material generally consists of clayey sand and sandy clay. Terrace Deposits (map symbol - Qt) Pleistocene -age marine terrace deposits underlie the upper portion of the mesa in the central sector and the western limits of the site. The deposits generally consist of reddish brown, dense,- moderately cemented, silty sandstone with localized lenses of gravel and cobbles. Torrey Sandstone (map symbol - Tt) Eocene -age Torrey Sandstone underlies most of the study area at depth. This unit generally consists of a very dense, white to tan, silty sandstone. It is generally massive, although some localized bedding and cross bedding occurs. 4 -1 Groundwater No seeps, springs, or other indication of a shallow groundwater table were observed. Groundwater is likely present in the study area, particularly at depth and along geologic contacts between surf icial deposits and formational materials, and in alluvium of drainage courses. Localized seasonal fluctuations in groundwater levels may occur due to variations in topography, subsurface geologic conditions, rainfall, irrigation, and other factors. Faulting, Seismicity, and Liquefaction No active faults have been previously mapped within the site. The La Costa Avenue fault is mapped approximately 4000 feet northwest of the study area. Although an inferred fault has been mapped along the eastern portion of the site, the only evidence observed was the absence of surficial exposures in the Delmar Formation along the west side of E1 Camino Real which may be the result of erosion and deposition of alluvium. In addition, a small fault has been mapped in a cut slope at the northern edge of the study area off Saxony Road. Observations of current conditions indicate that this feature may be a stratigraphic contact. The above mentioned faults, if present, are not considered active. The most significant probable seismic event in the study area would be an earthquake of magnitude 6.5 on the Rose Canyon Fault, located offshore about five miles to the west. Loose granular soils with silt and clay contents which are saturated by a relatively shallow groundwater table are the most susceptible to liquefaction. Mineral Resources Mineral resources in the study area may include sand and gravel. However, no known economic mineral resources such as sand and gravel have been identified on the site. Erosion Earth materials on the site have low to moderate potential for erosion in their present state. Erosion potential may be affected by alterations of the natural ground surface. 4.1.2 ENVIRONMENTAL EFFECTS Geologic impacts are significant if geologic hazards such as faults, landslides, slope instability, potential ground failure or liquefaction, and flooding are present which could negatively affect project improvements, especially those for human habitation and use. Soils impacts are considered significant if soils properties such as erodible, expansive, potential settlement, and poor permeability are present which could negatively affect project improvements. Development within the study area is feasible from a geotechnical perspective. No active faults are known to occur on or nearby the site. No deep- seated landslides have been mapped or observed. Sandy formational units present on the site should possess relatively favorable engineering characteristics. The majority of the corridor for the extension of Leucadia Boulevard is underlain by formational materials which should provide relatively favorable geotechnical conditions. There are a number of significant effects associated with geologic and soil conditions within the study area. Areas of the site underlain by alluvium (Qal) may be subject to liquefaction if saturated. Where uncompacted fills and unconsolidated alluvium are present on the property there may be potential for settlement under additional loads from embankments or structures. Cut slopes in Terrace Deposits (Qt) and Torrey Sandstone (Tt) on the site may not be stable and require remedial grading. 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Construction of paved roadways, parking lots, and other impervious surfaces will reduce infiltration and locally increase surface runoff. 4.1.3 MITIGATION MEASURES The Encinitas Municipal Code Sec.s 23.24.170 and 23.24.180 (Grading Ordinance) require soil and geology engineering reports for grading operations as follows: A soil engineering report, when required by the City Engineer, shall be prepared and certified by a California registered soils engineer and shall be based on adequate and necessary test borings, and shall contain all the following information: A. Data regarding the nature, distribution, strength, and erodibility of existing soils. B. Data regarding the nature, distribution, strength, and erodibility of soil to be placed on the site, if any. C. Conclusions and recommendations for grading procedures. D. Conclusions and recommended designs for interim soil stabilization devices and measures for permanent soil stabilization after construction is completed when necessary. E. Design criteria for corrective measures when necessary. F. Opinions and recommendations covering adequacy of sites to be developed by the proposed grading. Recommendations included in the report and approved by the City Engineer shall be incorporated in the grading plans or specifications. An engineering geology report, when required by the City Engineer, shall be prepared by a California certified engineering geologist and shall be based on adequate and necessary test borings and shall contain the following information: A. An adequate description of the geology of the site. B. Conclusions and recommendations regarding the effect of geologic conditions on the proposed development. C. Opinions and recommendations covering the adequacy of sites to be developed by the proposed grading. Recommendations included in the report and approved by the City Engineer shall be incorporated in the grading plans or specifications. Comprehensive geotechnical investigations including development specific subsurface exploration and laboratory testing should be conducted by state registered geologists /engineers prior to site development and construction of the Leucadia Boulevard extension. The investigations should include the following: An evaluation of subsurface conditions in areas of proposed development and provision of site specific data on potential geologic and geotechnical hazards and constraints, and information pertaining to engineering characteristics of earth materials. 4 -4 Recommendations for grading /earthwork, slope stability, subsurface drainage, roadway structural sections, and other pertinent geotechnical design considerations. As a result of the investigations, recommendations to control liquefaction may include installation of vertical drains, remedial grading, or ground modification. Settlement may be controlled by remedial grading, surcharging, monitoring by means of settlement monuments, deep foundation systems, or ground modification. Measures to control instability may include earth -fill buttresses or stability fills. Expansion may be controlled by selective grading or special foundation design. Areas to be graded can be constructed to control surface water runoff, drainage devices installed, and disturbed areas planted with drought resistant vegetation to control erosion. Subsequent comprehensive geotechnical investigations and implementation of recommendations therein will reduce identified significant geologic and soils impacts to a level of insignificance. 4.2 HAZARDOUS MATERIALS A phase 1 environmental site assessment of the project area and environs has been performed by Ninyo & Moore (1992). The assessment includes a review of title records, research of prior land use practices pertinent to hazardous substances, review of regulatory agency records of hazardous substances sites within one mile, review of historical aerial photographs and maps, a general visual site reconnaissance, and a report of findings, conclusions, and recommendations. A copy of the report, labeled Appendix B, is included with other technical appendices to this document. The following discussion is a summary of the assessment. 4.2.1 EXISTING CONDITIONS Potential Environmental Concerns The majority of the study area has been purposes or left in its natural state. This site reconnaissance indicated a number of Locations of potential concern areas ar description of each concern follows. Pesticide and Herbicide Usage historically used for agricultural use together with records checks and potential environmental concerns. e shown on Figure 4 -2. A brief Pesticides and herbicides are used in greenhouses and on open fields of the site. Documentation of historical pesticide and herbicide use is not available. Compounds currently used have hazardous ingredients including chlorinated compounds. Tenant growers in the study area use pesticides and herbicides such as Avid, Benlate, CHIPCO, Orthene, Round UP, Diquat, and Malathion. Prior to 1989, copper sulfate was used as an inhibitor of algae growth beneath growing tables within greenhouses. Lagoons (map symbol - LAG 0) Three lagoons to capture stormwater runoff for use in emergency situations such as drought are located in the study area. Lagoons 1 and 2 are hydraulically connected with a sump and pump station. These lagoons provide approximately one percent of the irrigation water used on the property. Lagoon 3 is currently not utilized. Another source of water to Lagoons 1 and 2 is runoff from the greenhouses. Excess water from sprinklers and misters is collected in plastic piping underneath growing tables. Some of the water is recycled and some discharged to a collection sump. Any contaminants in the water have the potential of entering the subsoil through the bare soil floors of the greenhouses. Since copper sulfate was used in greenhouses prior to 1989, there is a possibility that some copper sulfate has entered lagoon waters. These lagoons may also have received pesticides and herbicides. 4 -5 Upon inspection the water in Lagoon 1 appeared very clear and green with the greenish tint suggesting algae growth. Vegetation o green, the covered owiths not clear, what stressed. Water in Lagoon 2 was also g appeared to be algae. Vegetation around the lagoon was not stressed. The extensive oon growth was dry d o and overgrown with weeds.s added from the greenhouse runoff . Lag Underground Storage Tanks and Contaminated Soil Stockpile (map symbols - UST 0, Css) During the summer of 1990, 24 underground storage tanks (UST's) were removed from the study area. Twenty -one of these tanks were 10,000 gallon UST's storing diesel fuel, two were 1,000 gallon UST's storing gasoline, and one was a 560 ed gallon UST storing waste oil. There three drocarbons,o all assoc at d rwith as containing soils impacted by p etroleum hydrocarbons, former UST's. UST Site 1 is a former location of eighteen 10,000 gallon diesel tanks. UST Site 2 is the former location of two 1000 gallon gasoline tanks. UST site 3 was impacted by a leaking remote fill pipe associated with three 10,000 gallon UST's storing diesel. Previous analysis of soil samples indicate that the impacted soils in these three locations have been removed and stockpiled on the site. The approximate 180 cubic yards of stockpiled soil has been allowed by the San Diego Hazardous Material Management Division (HMMD) to remain on the property to naturally biodegrade over time. Remaining issues related to the UST removal are the condition of stockpiled contaminated soils, approximately 800 feet of underground piping to the removed UST's (UST No.l), and potential existence of three additional UST's. Two 2,000 gallon UST's are currently in service to store gasoline in the study area. Annual integrity test results since 1988 indicate a leak in piping for the tanks. The piping was repaired and passed follow -up testing. Based on the previous leak, soils around the leaking pipe may have been impacted by gasoline. Plant Refuse Stockpile Area (map symbol - PRS) Plant refuse is disposed of in a small valley on the site. The refuse appears to consist of soil and plant material from potted plants. The refuse is stockpiled but not reused. Soils in this location have not been tested for pesticides, herbicides, or copper. Vehicle Maintenance and Chemical Storage Facilities (map symbols - VMF, CSF) There are vehicle maintenance and chemical storage facilities on the site. Stained concrete floors were observed in the vehicle maintenance area. Hazardous wastes are stored in a bermed area. This containment area is stained and filled with absorbent material. The present chemical storage area is approximately three years old and is in good condition. The concrete floor has no obvious cracks or fractures, is covered with a protective coating, and the outside loading and unloading area is contained by a concrete berm. Within the pad is a blind sump to, collect spillage of hazardous substances. In the past, the chemical storage area was located near the maintenance and fertilizer storage areas. Historical Land Use The majority of the site has been historically used for agricultural purposes or left in a natural state. The Ecke holdings have been utilized since the late 1920'x. Currently in addition to the Ecke poinsettia operation in the southwest portion of the site there are 10 tenants on the property. Agricultural use started on or before 1928, mostly in the southwest sector and in Green Valley along E1 Camino Real. Agricultural usage expanded gradually to the north until 1980 when nearly the entire area was cultivated. About one -half of the 4 -7 greenhouses were constructed in the southwest sector by the 1960's with the remaining greenhouses built by the 1980'x. Surrounding residential uses were not constructed until the late 1970's and early 19801s. Rea atory Records Review Neither the project site nor properties within a one -mile radius of the site have been listed by federal agencies as having experienced significant unauthorized releases of hazardous substances or other events with potential adverse environmental effects. Ten facilities within one mile of the project site and the site itself are documented as "No Further Action Required ", "Preliminary Assessment ", or "Unresolved" by the California Department of Health Services. Two facilities and the project site are documented as "Leaking Tanks" by the Office of Planning and Research. Within one mile of the site four facilities are documented as "Case Closed ", one facility is documented as "Unknown ", and one facility and the site are documented as "Preliminary Site Assessment Underway" by the State of California Leaking Underground Storage Tanks Information System. Within one mile of the project site six leaking UST locations are documented as "Case Closed ", two locations including the site are listed as "Preliminary Assessment Underway ", and one location is documented as "Remedial Action Underway" by the Regional Water Quality Control Board ( RWQCB). Within one mile of the site 15 facilities with toxic releases are documented as "Case Closed ", one facility and the project site are documented as "Preliminary Assessment Underway ", and one facility is documented as "Leak Being Confirmed" by the RWQCB. One landfill site is reported by the RWQCB within one mile of the site. Operating Permits Thirteen facilities within a one -mile radius of the project site are included in a California Department of Health Services data base tracking movement and disposal of hazardous waste. Twenty -eight facilities within one mile of the project site and the site have State Water Quality Board permitte& UST's. 4.2.2 ENVIRONMENTAL EFFECTS Hazardous materials are significant if known contaminated sites or contamination sources occur in or near the site, if underground fuel tanks occur on the site, or hazardous materials associated with manufacturing, agricultural, or other uses have been used on the site which could negatively effect life forms health and safety. Although it appears that several documented releases of hazardous wastes in the study area have been reported, impacts pertaining to the site are considered low to moderate at this time. Three locations with documented contamination are situated within one - quarter mile of the study area. Two of the locations are UST removal sites which have been reported as needing no further action. The third site is a closed landfill which is ranked as a low priority. A number of significant hazardous materials impacts are identified. The subsurface of agricultural fields and plant refuse stockpile area on the site could contain pesticides, herbicides, and copper. Water in Lagoons 1 & 2 could contain pesticides, herbicides, and copper. Contaminated soil stockpiled on the site could contain petroleum products. Two abandoned 10,000 gallon diesel UST's may not have been removed from the property. The subsurface of the vehicle maintenance locations, past chemical storage areas, and greenhouse areas could be impacted by hazardous materials. 4.2.3 MITIGATION MEASURES Further assessment of potential adverse environmental impacts from past use of hazardous materials in certain locations on the site should be conducted by licensed/ registered site assessors prior to site development and construction of the Leucadia Boulevard extension. The assessment should include the following: 4 -8 Site - specific environmental audits, on -site soil borings, installation of groundwater monitoring wells, sampling, and analysis. Specific localities for further assessment to include: Subsurface of agricultural fields and plant refuse stockpile; Lagoons 1 and 2; contaminated soil stockpile site (monitoring to verify effectiveness of treatment); two 10,000 gallon diesel UST's (possible presence confirmation); and subsurface of the vehicle maintenance areas, past chemical storage areas, and greenhouse areas. As a result of further assessment remedial measures may include UST and supporting systems removal, facilities removal, decontamination of lagoons in place, decontamination of soils in place, removal of contaminated soils and decontamination of on -site stockpiles, and /or removal of contaminated soils for disposal at an approved offsite location. Subsequent hazardous materials assessment and implementation of recommended remedial measures therein will reduce identified significant hazardous materials impacts to a level of insignificance. 4.3 HYDROLOGY AND GRADING A grading, hydrology, erosion, and water quality evaluation of the Encinitas Ranch Specific Plan area and environs has been performed by F.C. Springer & Associates (1993). The evaluation includes a description of existing tributary drainage basins, hydrologic conditions, erosion and sedimentation, and water quality as well as an analysis of impacts and recommendations for mitigation. A copy of the report, labeled Appendix C, is included with other technical appendices to this document. The following discussion is a summary of the evaluation. 4.3.1 EXISTING CONDITIONS Watershed Description The Specific Plan area consists of approximately 850 acres divided by a steep ridge running north and south midway through the property. This ridge serves as a boundary dividing the area into two major watersheds and four major tributary watershed areas. The watershed boundaries and principal existing drainage improvements are delineated on Figure 4 -3 and described briefly as follows. On the east side of the north to south ridge, drainage is easterly into Green Valley and Encinitas Creek which flows north into Batiquitos Lagoon. This watershed drains both the bluff along the upper mesa and low lying areas on both sides of E1 Camino Real. Runoff enters the south branch of Encinitas Creek which meets the main channel near the intersection of El Camino Real and Olivenhain Road. The creek then flows north along the west side of E1 Camino Real and offsite through extensive riparian habitat to La Costa Avenue. A triple 12 by 8 foot box culvert under La Costa Avenue conveys flows from Encinitas Creek into Batiquitos Lagoon. The west side of the north to south ridge, referred to as the Upper Mesa, drains into various watercourses that convey runoff either to Saxony Creek and Batiquitos Lagoon or through storm drains and natural courses to cottonwood Creek and the Pacific Ocean. There are three major tributary watershed basins draining the upper mesa. The northerly of these tributary basins includes a portion of Indian Head Canyon and drains offsite into a natural watercourse called Saxony Creek flowing north under and along Saxony Road to La Costa Avenue. A siltation basin constructed in the mid 1980's is located in the watercourse on the west side of Saxony Road north of Quail Hollow Road. At La Costa Avenue, drainage is carried under the roadway in a 10 by 6 foot box culvert to Batiquitos Lagoon. 4 -9 Known as Quail Gardens, the second tributary basin on the upper mesa includes two existing reservoirs in the study area. These reservoirs are used to capture storm water runoff for use in emergency irrigation situations such as drought or water system outages. Downstream of the reservoirs runoff enters the northerly branch of Cottonwood Creek which flows along the east side of Quail Gardens Drive and through the Quail Park subdivision to the intersection of Quail Gardens Drive and Encinitas Boulevard. At Encinitas Boulevard flow enters a double 6 by 6 foot box culvert on the north side of the boulevard and is conveyed into a series of storm drains along the south side of the roadway. The storm drain system extends to the west and under I -5 to connect to the main pipe for Cottonwood Creek. Sometimes referred to as Moonlight Creek, the third tributary basin contains a portion of the Cottonwood Creek tributary watershed with a concentration point at a 54 inch storm drain culvert extending under I -5 at the most westerly point of the Specific Plan area. Flow passes through the culvert into a natural watercourse southerly along I -5 and into the Cottonwood Creek storm drain system along Encinitas Boulevard west of the freeway. Flow then joins the main waters of Cottonwood Creek confined to a combination of culverts and open channels to Moonlight Beach and the ocean. Peak Flow Based on City of Encinitas Master Drainage Plan Update studies, virtually all of the existing storm drain facilities that receive runoff from the study area watersheds are inadequate to handle the ultimate development peak flow occurring with a 100 year flood event. One exception is the 54 inch culvert under I -5 conveying runoff from the most westerly portion of the site. Another exception is the combination of a double 60 inch storm drain and overflow section through the Quail Park subdivision. Based on studies by the cities of Carlsbad and Encinitas, the triple 12 by 8 foot box culvert under La Costa Avenue that conveys Encinitas Creek flows to Batiquitos Lagoon is inadequate to handle the 100 year peak flow. However, additional recent investigations (Howard Chang) indicate that detention basins and minor improvements to reduce peak flows in Encinitas Creek will allow this culvert to handle the 100 year flood event. Floodplains Approximately 26 acres in Green Valley within the Specific Plan area along the south branch and main channel of Encinitas Creek is mapped (Howard Chang) as floodplain. The 100 year flood event is projected to be 1900 cubic feet per second (cfs). Historical drainage patterns of the floodplain and creek channel have been altered to some extent by agricultural operations, undocumented fill in certain locations, and the construction of E1 Camino Real. There is another unmapped floodplain along a tributary of Cottonwood Creek extending northerly near Quail Gardens Drive. The 100 year flood event in this location is projected to be 1400 cfs. Encinitas General Plan goals and policies pertaining to floodplains are presented in detail in the following subsection entitled General Plan Consistency. A pertinent Public Safety Element policy is to prohibit development, grading, or filling in drainage courses, floodways, and floodplains as provided by Land Use Policy 8.2 (PS 1.1). No development is allowed in the 100 year floodplain that is not compatible with the associated flood hazard such as nurseries, parking, agriculture, and open space. Only minimum grading and fill necessary to accommodate these uses is allowed, and such grading cannot significantly redirect or impede flood flows or require floodway modifications. Exceptions to limitations can be made to allow minimum equivalent development under zoning. Exceptions can also be made for circulation element roads, flood control projects to protect existing structures, and where protection is necessary for public safety. 4 -10 Erosion and Sedimentation Extensive erosion and sedimentation is evident in the Encinitas Creek floodplain and riparian areas as well as other natural watercourses in the study area. Significant sedimentation from Encinitas Creek has occurred offsite at Batiquitos Lagoon. Water Quality It is a generally adopted policy of state and local agencies and the cities of Encinitas and Carlsbad to ensure that storm runoff does not adversely impact habitat of coastal lagoons. A major adverse impact to lagoon water quality and habitat would be an increase in sedimentation and debris deposition. Significant sedimentation and debris buildup has already occurred in Batiquitos Lagoon from watersheds in and outside the study area. Another adverse impact to coastal lagoon water quality and habitat is an increase in pollutants such as metals, petroleum products, fertilizers, and other chemicals that can occur in agricultural and urban runoff. Erosion, sedimentation, and debris deposition as well as agricultural, nutrient, and urban pollutants can also adversely impact natural watercourses of the study area. Slope Slope gradients vary depending on the landforms present in the Specific Plan area. Percent slope in three categories for the study area is shown on Figure 4 -4. These categories are generally defined as 0 -25% being moderate, 25 -40% steep, and 40 %+ being very steep. Slope gradients of the upper mesa are relatively uniform at about 10% and flatter and fall into the moderate category. Slopes of the bluff along Green Valley range from approximately 12% through 25% to 50% and are primarily in the moderate, steep, and very steep categories. Green Valley slopes are fairly uniform at around 10% and in the moderate category. Slope gradients of the northern finger canyons range from about 10% through 25% to 50% and are mostly in the moderate and steep categories. Quail Gardens canyon slopes are primarily on the order of 15% and flatter and in the moderate category. There are approximately 44.32 acres of very steep slopes in the Specific Plan area which occur almost exclusively along the bluff. Another 60.13 acres are steep, and are mostly concentrated along the bluff and in the northern finger canyons. Together, the very steep and steep slopes total 104.45 acres, or 12% of the 852.8 Specific Plan area. On the Thornton property there are approximately three acres of slopes greater than 25% along the bluff and western boundary. The Leaf property has roughly 0.45 acre of steep slopes on a ridge face through the center of the site. Encinitas General Plan goals and policies pertaining to steep slopes are presented in detail in the following subsection entitled General Plan Consistency. A pertinent Public Safety Element policy is to restrict development in areas where slope exceeds 25% as specified in the Hillside /Inland Bluff Overlay Zone regulations (PS 1.2). Exceptions can be made for circulation element roads, and local streets and driveways necessary to access more developable portions of a site. The Hillside /Inland Bluff Overlay regulations allow maximum development encroachment by percentage of the total steep slopes on a site. For parcels with 75% or less of their total area in steep slopes the encroachment allowance is 10 %. 4.3.2 ENVIRONMENTAL EFFECTS Hydrology impacts are significant if flood hazards are created, runoff peak flow is increased, drainage patterns are altered, or streams and water bodies are subject to erosion and sedimentation. Water quality impacts are significant if runoff is contaminated or otherwise altered which could negatively effect life forms. Erosion impacts are significant where graded banks are higher than 30 feet. Grading impacts are significant if steep ( >25 %) slope encroachment exceeds 4 -12 allowances, there is floodplain or stream encroachment, or graded banks are higher than 30 feet and consequently noticeable. Development within the study area is feasible from the hydrologic standpoint. With development of the site, and through control measures, levels of sediment and debris compared to that from current agricultural land use will be reduced. With development, nutrient levels such as nitrogen and phosphorus from agricultural runoff reaching natural stream courses and Batiquitos Lagoon will also be reduced in some locations. However, numerous significant hydrology, water quality, erosion, and grading impacts are identified. Hydrology and Water Quality Hydrology impacts of the Specific Plan involve increases in runoff peak flow and floodplain encroachment. Floodplain encroachment is discussed in the following subsection. Tributary drainage basins for Land Use Plans A and B are shown on Figure 4 -5. Pre - development, post - development, and percent change in peak flow for each basin are listed in Table 4 -1. Generally, peak flows increase over the pre - development condition for both land use plans. The location of agricultural use strongly influences peak flows in various basins. Further, peak flows increase as development intensifies. With both Land Use Plans A and B there are substantial increases in peak flow in the Quail Hollow East and northern North Mesa planning areas (Basins A,B and C) with single family residences and the golf course. Development within the southern North Mesa planning area (Basins D and E) results in only small increases. There is a major reduction in peak flow in the northern South Mesa and northern Sidonia East planning areas (Basin F). From the regional perspective, there will be an overall significant increase in peak flows from these four planning areas (Basins A through F). Runoff will be into a natural watercourse northerly along Saxony Road to Batiquitos Lagoon. In Green Valley (Basin L) there is a significant increase in peak flow associated with the regional commercial and mixed use development. The basin drains into the south branch and main channel of Encinitas Creek and north to Batiquitos Lagoon. Peak flow for the West Saxony, East Saxony, Quail Gardens East, and South Mesa planning areas differs depending on uses under the two land use plans. The location of agriculture strongly influences peak flows in respective basins. With Land Use Plan A peak flows increase substantially in the northern East Saxony and Quail Gardens East planning areas (Basins H and K). With Land Use Plan B peak flows increase substantially in the South Mesa planning area (Basin G) while there are major reductions in peak flow in the East and West Saxony planning areas (Basins J and K). From the regional perspective there will be a significant increase in peak flow into Cottonwood Creek west of I -5 by way of Moonlight Creek with Land Use Plan A and a significant increase in peak flow into the creek east of I -5 through the northern Quail Gardens tributary with Land Use Plan B. Water Quality impacts are identified as urban pollutants, erosion and sedimentation, and nutrient pollutants. These elements not only affect watercourses within the Specific Plan area but also downstream waters of Encinitas Creek, Saxony Creek, Batiquitos Lagoon, Cottonwood Creek, and the nearshore ocean. The changes in urban pollutant, sediment, and nutrient pollutant sources by basin for Land Use Plans A and B are listed in Table 4 -2. Conversion of agriculture to other uses results in a reduction in sediment sources and, except for landscaped open space uses such as the golf course, a reduction in nutrient pollutant sources. Urban pollutant sources increase as development intensifies. There are new or substantially increased urban and nutrient pollutant sources for both Land Use Plans A and B in the Quail Hollow East, and northern North Mesa planning areas (Basins A through E) associated with single family residential and golf course development. At the same time there are moderate to major reductions in sediment sources in these areas. In the northern Sidonia East and southern 4 -13 Table 4 -1 Runoff Peak Flow for Specific Plan Tributary Basin Planning Designation Area Tributary Basin Area (AC) Pre - Development Runoff Composite Coefficient (C) Post- Development Runoff Composite Coefficient (C) Change in Peak Lo Flou Land Use Plan A A 1 44,2 0.40 0.45 +13 B 1,2 23.8 0.30 0.36 +20 E F,D C 1.2 47.8 0.41 0.46 +12 2 41.8 0.41 0.43 + 5 E 2,3 46.1 0.42 0.43 + 2 F 2,3,7 53.0 0.55 0.46 -16 G 7 137.1 0.40 0.40 0 H 3,5,6,7 170.9 0.45 0.52 +16 I 7 3.1 0.45 0.45 0 1 4,5 38.0 0.67 0.70 + 5 K 4,5 56.6 0.53 1 0.66 +25 L g 246.8 0.40 0.50 +25 Land Use Plan B A 1 44.2 0.40 0.45 +13 B 1,2 23.8 0.30 0.36 +20 C 1,2 47.8 0.41 0.46 +12 D 2 41.8 0.41 0.43 + 5 E 2,3 46.1 0.42 0.43 + 2 F 2,3,7 53.0 0.55 0.47 -15 G 7 137.1 0.40 0.48 +20 H 3,5,6,7 170.9 0.45 0.49 + 9 I 7 3.1 0.45 0.45 0 4,5 38.0 0.67 0.51 -24 K 4,5 56.6 0.53 0.46 -13 L 8 246.8 0.40 0.50 +25 Source: F.C. Springer & Associates (1993) 4 -16 Table 4 -2 Water Quality Elements for Specific Plan Tributary Basin Designation Planning Area Tributary Basin Area (AC) Change in Urban Pollutants Sources ( %) Change in Sediment Sources (%) Change in Nutrient Pollutants Sources (%) Land Use Plan A A 1 44.2 NUNPS -20 NUNPS B 1,2 23.8 NUNPS -18 NUNPS C 1,2 47.8 +1056 -20 + 678 D 2 41.8 + 333 - 7 + 101 E 2,3 46.1 + 142 - 6 + 46 F 2,3,7 53.0 - 30 +13 + 27 G 7 137.1 0 0 - 2 H 3,5,6,7 170.9 NUNPS -22 - 40 I 7 3.1 0 0 + 82 J 4,5 38.0 + 31 -36 NUNPS K 4,5 56.6 + 197 -40 - 48 L 8 246.8 NUNPS -35 - 64 Land Use Plan B A 1 44.2 NUNPS -20 NUNPS B 1,2 23.8 NUNPS -18 NUNPS C 1,2 47.8 +1056 -20 + 678 D 2 41.8 + 333 - 7 + 101 E 2,3 46.1 + 142 - 6 + 46 F 2,3,7 53.0 - 14 + 6 + 18 G 7 137.1 NUNPS -29 - 27 H 3,5,6,7 170.9 NUNPS -13 - 35 I 7 3.1 0 0 + 82 J 4,5 38.0 - 54 +63 NUNPS K 4,5 56.6 - 91 +18 + 75 L 8 246.8 NUNPS -35 - 64 CNUNPS] Means new urban or nutrient pollutants sources. Source: F.C. Springer & Associates (1993) 4 -17 North Mesa (Basin F) there is a major reduction in urban pollutant sources together with a substantial increase in nutrient pollutant sources and moderate increase in sediment sources. The reduction in urban pollutants sources will be due to the conversion of greenhouses to residential use. Greenhouses with semi- permanent and permanent roofs in urban settings collect airborn pollutants. They also have surrounding paved surfaces which collect vehicle oils and tire residue. Of regional importance is a significant increase in urban and nutrient pollutants and a major reduction in sediment entering Saxony Creek and Batiquitos Lagoon. In Green Valley (Basin L) with both land use plans there are new sources for urban pollutants associated with the regional commercial and mixed uses and a major reduction in both sediment and nutrient pollutant sources. From the regional perspective there will be significant new urban pollutants and a major reduction in sediment and nutrient pollutants entering Encinitas Creek and Batiquitos Lagoon. Water quality elements for the West Saxony, East Saxony, Quail Gardens East, and South Mesa planning areas differ depending on uses under the two land use plans. Where agriculture is located clearly affects changes in water quality elements. With Land Use Plan A there are new or substantially increased urban pollutant sources in the West Saxony, East Saxony, and Quail Gardens East planning areas (Basins H,J, and K). Except in West Saxony and southern East Saxony (Basin J) where new nutrient pollutant sources are introduced, there are also major reductions in sediment and nutrient pollutant sources. With Land Use Plan B there are new urban pollutant sources in the South Mesa and Quail Gardens East planning areas (Basins G and H) together with major reductions of both sediment and nutrient pollutant sources. In the East and West Saxony planning areas (Basins J and K) there are major reductions in urban pollutant sources together with substantial increases in sediment sources and substantial increases in or new nutrient pollutant sources. From the regional perspective there will be a significant increase in urban pollutants into Cottonwood Creek west of I -5 through Moonlight Creek with Land Use Plan A while with Land Use Plan B there will be a significant increase in urban pollutants into the creek east of the freeway by way of the northern Quail Gardens tributary. Grading and Slope /Floodplain Encroachment Grading volume for implementation of both Land Use Plans A and B is estimated at 2,142,230 cubic yards of balanced cut and fill. Graded area will total approximately 494.8 acres. This equates to 4330 cubic yards per graded acre or 2512 cubic yards per acre for the entire site. These per acre grading volumes are are considered moderate. The maximum height of graded banks associated with circulation plan roads will be 90 feet along Via Cantebria in Green Valley. Maximum bank height for Leucadia Boulevard will be 75 feet in the bluff cut between the upper mesa and Green Valley. Bank height along Via Cantebria near the bluff will reach 45 feet. Where Quail Gardens Drive cuts through the upper mesa to connect with Quail Hollow Drive bank height will be 85 feet. The maximum bank height for other locations throughout the Specific Plan area will be 55 feet at golf course hole 15. There are various localized areas throughout the Specific Plan area where graded banks exceed 30 feet in height. These locations are shown on Figures 4 -6 and 4 -7 with acreage by land use itemized in Table 4 -3. The largest graded area with high banks for both Land Use Plans A and B is along Via Cantebria adjacent to the regional commercial center. Approximately 6.7 acres of high banks are planned in this location with heights to a maximum of about 90 feet. The next largest areas with high banks, totaling 10.0 acres for Land Use Plan A and 9.1 acres for Land Use Plan B, are also associated with circulation plan roads. Common locations include the Leucadia Boulevard extension bluff cut, Via Cantebria extension into Green Valley, and the extension of Quail Gardens Drive in the Quail Hollow East planning area. For Land Use Plan A there are also high banks along the Union Street extension and Street A. For Land Use Plan B additional high banks are located along Street A. 4 -18 Table 4 -3 Grading Elements for Specific Plan Land Use Type Area (AC) Encroachment of 25%+ Slopes (AC) Graded Banks with 30 Ft+ Height (AC) Encroachment of Encinitas Creek FLoodplain (AC) Land Use Plan A Sin Le Famil y Residential 116.4 8.4 1.2 0.0 Mixed Use 87.3 0.2 0.3 0.6 ELementary School 12.1 0.0 0.0 0.0 Regional Commercial Center 73.8 0.0 6.7 7.3 Golf Course 173.4 16.1 1.5 0.0 Agriculture 134.1 0.0 0.0 0.0 Community Park 29.8 0.0 0.0 0.0 Open Space 179.6 0.0 0.0 15.7 Roads (circulation element) 46.3 7.7 10.0 1.9 Total 852.8 32.4 19.7 25.5 Land Use Plan B Sin le Famil y Residential 157.1 8.4 0.7 0.0 Mixed Use 47.6 0.2 0.3 0.6 Elementary School 10.0 0.0 0.1 0.0 Re ionaL Commercial Center 73.8 0.0 6.7 7.3 Community Use 17.2 0.0 0.7 0.0 Golf Course 173.4 16.1 1.5 0.0 Agriculture 126.0 0.0 0.0 0.0 Community Park 29.8 0.0 0.0 0.0 Open Space 170.3 0.0 0.0 15.7 Roads (circulation element) 47.6 7.2 9.1 1.9 Total 852.8 31.9 19.1 25.5 Source: F.C. Springer & Associates (1993) 4 -19 Specific Plan grading encroachment into slopes with gradients of 25% or steeper for Land Use Plans A and B is shown on Figures 4 -8 and 4 -9 with acreage by land use itemized in the previously presented Table 4 -3. There is a total 32.3 acre encroachment into steep slopes with Land Use Plan A and a 31.9 acre encroachment with Land Use Plan B. Net encroachment, or the total less circulation plan roads, is 24.6 acres or 24% with Land Use Plan A, and 24.7 or 24% with Land Use Plan B. These net encroachments are greater than the 10% allowance for the 104.45 acres of steep slopes on the site. The largest block of encroachment for both land use plans is by part of the golf course in the Quail Hollow East and North Mesa planning areas. There is approximately 16.1 acres of encroachment in this location involving holes 13, 15, and 16. The next largest block of encroachment is about 8.4 acres of the single family residential area between the golf course holes 14 and 15. The remaining substantial areas of encroachment totaling 7.7 acres for Land Use Plan A and 7.2 acres for Land Use Plan B are associated with circulation plan roads. The bluff bluff for the Via cut for Cantebria Next extension withubboth r land use extension n e plans account for the majority of roadway encroachment. Unmapped floodplain of the Cottonwood Creek tributary in the Quail Gardens East planning area is designated for open space. Specific Plan encroachment into the Encinitas Creek floodplain is shown on Figure 4 -10, and acreage by land use itemized in the previously presented Table 4 -3. Total floodplain area both land use plans is 25.5 acres with the largest area of encroachment being 15.7 acres of open space recreational uses and channel improvements. The next largest area is the regional commercial center occupying 7.3 acres. Mixed use occupies 0.6 acres while circulation plan roads encroach into 1.9 acres of the floodplain. Allowable encroachment in accordance with identified exceptions include the open space uses, minimum commercial development of the Carter property, the extensions of Leucadia Boulevard and Garden View Road, and flood control protection of E1 Camino Real. In addition to encroachment the Encinitas Creek tributary channel is also relocated to the east both within and outside the floodplain. Encroachment of the floodplain and relocation of the tributary channel will alter historical patterns resulting in diversions, concentration of flows, and higher velocities. These conditions may increase erosion in the encroachment locations, degradation of the channel bottom, and downstream sedimentation both on and off the site. 4.3.3 MITIGATION MEASURES Hydrolocry and Water Ouality The Encinitas Municipal Code Sec. 23.24.140 (Grading Ordinance) requires a grading plan for grading operations which includes the following: D. Location and graphic representation of all existing natural and proposed man -made drainage facilities. E. Detailed plans of all surface and subsurface drainage devices, walls, cribbing, dams, and other protective devices to be constructed with or as a part of the proposed work, together with a map showing the drainage area and the estimated runoff of the area served by any drain. H. Location of proposed final surface runoff, erosion, and sediment control measures. Code Sec.s 23.24.150 and 23.24.160 (Grading Ordinance) require interim and final erosion and sediment control plans for grading operations which include the following: 4 -22 A. Maximum surface runoff from the site shall be calculated using the method approved by the City Engineer. B. Delineation and description of measures to retain sediment on the site including specifications for sedimentation basins and traps, and a schedule for their maintenance and upkeep; delineation and description of surface runoff and erosion control devices. In addition, Code Sec. 23.24.380 (Grading Ordinance) requires the following be included in an erosion control system for grading operations: A. The faces of cut and fill slopes and project site shall be prepared and maintained to control against erosion. D. Desilting facilities shall be provided at drainage outlets form the graded site. H. Erosion protection shall consist of effective planting of all cut slopes in excess of 5 feet high and fill slopes more than three 3 feet high unless otherwise approved by the City Engineer. Code Sec. 23.24.480 provides standards for drainage and graded bank terracing to further control runoff as follows: B. Terraces at least 6 feet in width shall be established at not more than 30 foot vertical intervals in all cut and fill slopes to control surface drainage and debris except where only one terrace is required, it shall be at mid - height. For cut or fill slopes greater than 60 feet and up to 120 feet in vertical height, one terrace at approximately mid height shall be 12 feet in width. Code Sec. 23.24.510 (Grading Ordinance) includes the following requirement for planting of slopes: The surface of all cut slopes more than 5 feet in height and fill slopes more than 3 feet in height shall be protected against damage by erosion by planting with grass and ground cover plants. Slopes exceeding 15 feet in vertical height shall also be planted with shrubs, spaced at not to exceed 10 feet centers; or trees, spaced not to exceed 20 feet centers; or a combination of shrubs and trees at equivalent spacing in addition to the grass or ground cover plants. The plants selected and planting methods used shall be suitable for the soil and climatic conditions of the site. Plant material shall be selected which will produce a permanent planting coverage effectively controlling erosion. Finally, Sec. 23.24.370 controls wet season work with the following requirement: A. No grading permit shall be issued for work occurring between October lst of any year and April 15th of the following year, unless the plans for such work include details of protective measures, including desilting basins or other temporary drainage or control measures, or both. All development must also comply with water quality guidelines and other requirements of the State Water Quality Control Board (WQCB) and Environmental Protection Agency (EPA) including those under Best Management Practices and the National Pollutant Discharge Elimination System (NPDES). Onsite flood detention basins should be provided in tributary basins with increased peak flows. For Land Use Plan A these are Basins A,B,C,D,E,H,J,K and L. For Land Use Plan B the Basins are A,B,C,D,E,G and L. Detention basins should be located in concert with present or future basins in the respective watersheds. Locations should include the Quail Hollow East, and North Mesa 4 -23 planning areas (Basins A through E), the Quail Gardens East planning area (Basin H) , the East and West Saxony planning areas (Basins J and K) , the South Mesa planning area (Basin G), and Green Valley (Basin L). In Green Valley the basins should be placed within development areas and not directly "on- stream" in Encinitas Creek. Onsite urban pollutant filtration basins and /or grassy swales or buffer strips (bio- filters) should be provided for all tributary basins with new or increased urban pollutant sources. For Land Use Plan A these include Basins A,B,C,D,E,H,J,K and L. For Land Use Plan B these are Basins A,B,C,D,E,G,H, and L. Locations should include the Quail Hollow East, and North Mesa planning areas (Basins A through E), South Mesa (Basin G), the Quail Gardens East planning area (Basin H), the West and East Saxony planning areas (Basins J and K), and Green Valley (Basin L). Urban pollutant controls should be located off - stream of Encinitas Creek and other natural watercourses. Irrigation and fertilizer management programs to minimize release of excess nutrients into surface water drainage should be implemented for the golf course in the Quail Hollow East, North Mesa, and South Mesa planning areas and open space recreational facilities in Green Valley. Onsite sediment traps /basins should be provided in tributary basins where development occurs. For Land Use Plan A these are A,B,C,D,E,F,H,J,K and L. For Land Use Plan B the Basins are A,B,C,D,E,F,G,H,J and L. Locations should include the Quail Hollow East, North Mesa, and Sidonia East planning areas (Basins A through F), the South Mesa planning area (Basin G), the Quail Gardens East planning area (Basin H), the East and West Saxony planning areas (Basins J and K), and Green Valley (Basin L). In Green Valley the basins should be placed at the toe of the bluff for open space areas. Comprehensive hydrology studies including peak runoff, erosion, sedimentation, grading, and water quality should be conducted prior to site development. These studies should include the following: Evaluations of and improvements for additional capacity and other improvements to existing storm drain facilities receiving flows from development; location and design of any necessary detention basins and storm drain facilities. Evaluations of and improvements for sediment and debris control for downstream natural water courses, storm drain facilities, and Batiquitos Lagoon; location and design of any necessary sediment, debris, and urban pollutant control basins. Measures to control erosion may include temporary and /or permanent desiltation /debris basins, soil conditioning and stabilization, vegetative cover, protective coverings, interceptor ditches, slope drains, and natural watercourse grade control structures such as check dams and drop structures. Measures to control water quality may include pollutant /filtration basins, desiltation /debris basins, grassy swales /buffer strips, porous pavement, and the erosion control measures above. The above measures will reduce identified significant hydrology and water quality impacts to levels of insignificance. Grading and SlopelFloodplain Encroachment The Encinitas Municipal Code Sec.s 23.24.450 and 23.24.460 (Grading Ordinance) regulate graded cuts and fills as follows: The slope of cut of fill surfaces shall be no steeper than is safe for the intended use. Cut or fill slopes shall be no steeper than two horizontal to one vertical (2:1). Slopes steeper than 2:1 may be permitted under special circumstances where the intent of the 4 -27 steeper slope is to provide a slope of varying steepness in order to more closely approximate a natural appearing embankment. In addition Code Sec. 23.24.490 (Grading ::rdinance) requires rounding and blending of slopes as follows: A. All slopes greater than 15 feet high shall be rounded into the existing terrain to produce a contoured transition from slope face to natural ground and abutting cut and fill surfaces where conditions permit. B. Straight uniform slopes shall be avoided. Every effort should be made to construct slopes that appear natural in character. The steepness of slopes should vary and slope faces should undulate in an effort to produce a more natural appearing slope. Sharp angular changes in the direction of slope faces shall not be permitted. Graded banks should not exceed 30 feet in height where feasible for site specific development. Al- graded banks greater than 15 feet high should be contour, or land -form graded. Graded bank slope increments should vary and banks undulate both vertically and horizontally. The above measures will reduce grading impacts associated with high bank visibility to a level of insignificance. The above measures together with previous measures for water quality will reduce erosion impacts associated with high banks to levels of insignificance. Encroachment of steep slopes in excess of the allowance cannot be mitigated without redesign. An alternative to adequately reduce encroachment would be one which withdraws grading from steep slopes in the Quail Hollow East and North Mesa planning areas. This redesign is discussed in the following section entitled Alternatives to the Proposed Action. Bridge structures for roadways should be provided to span the Encinitas Creek floodplain. A site specific hydrology study and drainage control plan should be prepared and implemented to minimize the effects of floodplain encroachment and channel relocation. The plan should be for an open, soft bottom environmental channel with vegetative linings, drop structures, and other energy dissipating structures. Design consideration should be made for necessary Green Valley off - stream urban pollutant and sediment control measures. Encinitas Creek floodplain encroachment by commercial and mixed use development can only be mitigated through redesign. To adequately reduce encroachment would be a redesign which withdraws development from the floodplain. A discussion of this redesign is also presented in the section entitled Alternatives to the Proposed Action. Another option is to amend General Plan Land Use Policy 8.2 to allow floodplain intrusion under certain circumstances. This option is discussed in the subsection entitled General Plan Consistency to follow. 4.4 TOPOGRAPHIC ALTERATION AND VISUAL QUALITY 4.4.1 EXISTING CONDITIONS Landforms Topographic features within the Specific Plan area are diverse. As can be seen on Figure 4 -11, the area is dominated by a north -south trending mesa, an inland bluff defining its eastern edge, and the open north -south trending Green Valley below. The northwest portion of the mesa is cut by distinct east -west trending finger canyons extending from nearby Indian Head canyon with ridges between them. In the south, the mesa is bisected by the relatively open Quail Gardens canyon extending into the property from Cottonwood Creek canyon beyond. The bluff is cut by numerous ravines and gullies forming sharp ridges between them. There is a thin sandstone escarpment at the bluff top. A partially channelized tributary 4 -28 00 ,e h long the eastern edge of Green Valley near creek flows northerly a 8 miles)- of Encinitas roximately 9600 feet (lsevered by E1 Camino Real. ofi p the where it is about ve with a length south measuring is extensi miles) wide and from about The upper mesa 5900 feet (1.1 the mesa is at its narrow high from In the north 8200 feet (1.6 miles) feet It is roughly canyon, around roximately 125 to 200 from 1300 to Quail Gardens The bluff i. face is ap' miles) long plan area to 1000 feet across. The bluff 4500 feet (0.85 and the p wide. Valley extend bey order of 1000 900 to 1600 feet en Valley is about on the roughly top- bluff and Green canyon is toe to Both the canyons in the northwest Gardens 1800 feet wide. Finger cant' feet wide. Quail south. d 400 to d 1 wide. the nortfeet long and 1300 feet with to 1400 long creek confluence near 3800 feet (0.72 miles) the tributary atop the mesa low of 74 feet MSL h at of 399 feet MSL are 375 feet range from a Road to a the mesa top feet MSL Elevations Olivenhain elevations on to 325 to 305 Other representativ a ently declining canyons range from 175 Encinitas Creek near edg g er top. In Quail its eastern edge th of the eastern the northern fing MSL along the le 325 feet MSL near the mesa around 300 side. Elevations in MSL in the bottom to in Green along the western bottoms to around feet of the bluff to feet MSL in range from 200 along the toe gently declines and en canyon elevations The valley floor g channel drops Gardens the mesa top. Elevations creek 250 feet MSL• The tributary where it joins feet MSL near 175 to creek. Valley range from the tributary of 76 feet in the north around 100 feet MSL south to a low from 120 feet MSL leaves the property- Encinitas creek and the study area, topographic features in Green Valley and Prominent Features bluff bordering Valley- noticeable major facing aci)us, open Green four readi' the rugged east the sP from Indian There are foremost its top, Second is extending prominent First and line along canyons and associated ridge. The fourth p associated ridge finger cany the upper mesa' ortion of the upper Third is the distinct Port of the southern P Green Valley, canyon into the no s canyo Separating are the bluff along in Head is Quail Gardens features Creek sector ofYthe feature individual natural the Cottonwood Sector Distinct its tributary drainage► in the northwest mesa. Creek and fingeY canyons Encinitas canyon► and steep Quail Gardens ly sensitive site. ertaining to' topographical subsection goals and Policies p iri the following resented in detail Use Element policies include Encinitas General areasg are P Pertinent Land and constrained n to minimize hazard icant lain areas a, preservation of sig entitled General Plan ment in f10 w as require drainage courses, limitations on develo LU 8.2), as well toppings, natural rock outcropp and views (LU 8.6)• preserve res °urcessuch as bluffs opography, trees, natural featar s areas, steep wetlands/riparian etlands/ P o raphY of the plan limited by the tOP g from the Vises is can be obtained the Specific Plan area the plan area and the foothills of Distant views of to the north, Costa the open Visibility of and La and ridge area and its environs. La Costa in Carlsb F From Aviara face, hilltops of Aviara and to the east• arral covered bluff a moderate Olivenhain Valley, rugged chap make up ridge line northeastern the mesa topface and cultivated fields Ofeu�alyPtus windbreak along background. line with pine and From olivenhain the bluff the wide background- extensive and far reaching a Dints are Part of small part of the constitute a public and private vantag P ediate (very close) P views can be obtained from the plan area close - 2)► and ocean View (map Principal close and 3'. West of the p e map symbol Inge canyons Figure 4 -12. ( covered northern fing shown on of - 1), Rainbow Ridge and windbreak beyond make hborhoods of Leu, cultivated The scrub top, Sk _ (31 neigh cultivated mesa symbol cultivated ridge tops. with some 4 -30 up a major part of midground °m ocean View nd and background from and background, cultivated fields and scenery from Sk the Stratford TO the south greenhouses Yloft symbol (ma yo1 relatively are seen as and Rainbow mesa top and eighborhoods of Old 4) and Camino La Orchedalews can also be of the greenhouses u Encinitas. From these Camino be gained make p a lar E1 Dorado (map East of the gas. Part of the locations the cultivated Costa Avenue and area close background. views Of La Costa (mad symbol Road can be gained from rugged bluff facesbol 7)• Although 6) and Etheamino Real between Green Valley to et with ridgeline and gh °ften obscured Levante nei La From Levante the her with the bluff windbreak, and later Parian forest Y ri midground and valley, bluff and ridgeline can Cultivated ' the background , and ridgeline be seen from the of scenery, make roadway. Immediate v' up a portion of the Quail sews north of the broad Hollow Drive Plan area neighborhood and Normand can be obtained canyons °f Leucadia Y Road (ma from Saxon with cultivated rid at symbol P symbol - 8) and y Road between cultivated mesa geto s 9)• The scrub the Quail Gardens eucalyptus top and P make up a major covered northern yptus groves are a not cn br dominating P he Backe midground with he West of the 1 this scenery. the symbol Plan area immediate Y� symbola10) and the Fox views can be south of Point neighborhood gained from Sidonia top, and windbreak beyond Boulevard cultivates Leucadia (map symbol Street (map is noticeable beyond dominate fields and )• From Boulevard in the midground. the entire view. Pastures of the finger greenhouses first From Foxpoint aloe Prominent eucalyptus mesa g canyons makin line the street g Sidonia north YPtus grove up the street. The up the midground with the northern °f Leucadia Poinsettia Plan area and the mesa to scrub covered cultivate Park can also be P the back d fields and Mangano Circle (ma seen from ground further line the street, p symbol - 12 Saxony Road between Immediate views Greenhouses and a few north sews south of the of Quail Gardens Plan area can be neighborhood Court (ma gained from dominate the (map symbol - 14). (map the Gardens foreground and 13) and Drive by trees are noticeable midground. The old Vogel. of Quail Delphinium Street windbreak along in the gel Ranch Garden canyon Plan are g the ridgeline midgr °und. A scrub buildings a in this make up the covered gs surrounded syaol location are also background. Canyon side 15). From east facing Provided from Immediate with the above scene makes u g higher Quail Botanical views of the the Garden dominate the P much garden grounds Gardens (map top and windbre foreground i e midground. The and the observation tower Margarita ak beyond co mmediately to the tots °f greenhouses Mountains and San command a major share north. The cdltivatedbel a the horizon. acinto Of °f the back mesa can be seen ground. The Santa East of the during clear days on Via M f the Plan area immediate views Amar ivenand E dC View Road maan be obtained from El Vista Dr' amino P symbol Canino neighborhoods Real (ma - 16), olio Real between neighborhood °f New Encinitas (ol - 17)� the Garden Road between Valle °f La Co arden V' Y, rugged bluff costa (map symbol _ 20 symbols - 18,19 iew and Mountain dominate the with escarpment ). The cultiv )' and the Amargosa Green Valle midground and background along its to ated fields of the Y and elsewhere from these P, and ridgeline with Green rainbow affect of in the Plan locations. windbreak colorful blooms area are in cut flower o hen the fields of Designated v' is striking, r stock production corridors i the Points in " significant single vista Specific plan viewsheds cannot be point in the vicinity environs scenic highways and scenic view clearly Y is at Oak Cr are shown on F north to La y seen• Leucadia Bo est p figure 4_ Of the Costa Avenue ulevard, Saxon ark, from which the l3. The Plan area. 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AV N 3 F I s 6 y� tll > LS mM3 J w a0 r73nZVld b3 1J ba30Yl '< m 08 H 3nl f �d ° 10 000 as Q3a�lllH < a nC u m a J 31Nbn3'1 OJ^1 -N3JS.3 n h rte' y o r 2 r @ 7 41 S 3801 � � 11; a ? l l Y )Y s' y 99 II 1J �C 7 N `) DmJ 410 IlV p f1Q ��' Y rJ aN y 3 _ A-C / Oa y YNY n1NVN w 7 bo lYd )O > z i �s l A O o .__..o o� b�b 3n3 1S3a0� ^= �_ O \ " S y301 AK o v � Pd) ITS Z 9nl> A1lunoj-D)SO: DI '� /Ib dl d� b �SIYI -t asnOH 4n!3 a / ' - d1S03- -vi �' • p ° oa 31Nb b�� i ro s _ _ 8011nbl vg < 1` A M r,N u I dls°J Y1 p `''l J .� > -f idt c S34jol3 .711 30 VZY� n, r7 arNO dwr >�3� r < °a ado nlOj15 S0-L! nfJvv 39 n� H3N \d -1 ✓ I1l F!Cl y �0,,/ �Y b �`'' 0 Ob O- ^-.�}\ Oy 1, s% J M i CO • - i IP AN ON N 1 d' O 4-) cd ,1 1) k r4 :3 O to � U � O v v U U 0 •� $4 q -- b+ C M c0 o a ON � H 131 CG v 0 04 H O 1 H 01 N -4 o w �3 OOfii V Fe u ` \ / II jL .rr 1 1 Nl et .i v \ \\ \ —Z \'`�� \•�" ` � �� - "/�'/ tea: \ ,c$` Encinitas General Plan goals and policies pertaining to scenic highways, community views, vistas, and aesthetic qualities are presented in detail in the following subsection entitled General Plan Consistency. Pertinent Circulation Element policies are to design roads to enhance scenic areas (C 4.1), promote roadside and median landscaping (C 4.2), and establish a separate system for trails and paths (C 4.4). Pertinent Resource Management Element policies are to maintain and enhance the scenic highway /visual corridor viewsheds (RM 4.6) and subject development along scenic highways, within scenic view corridors, and adjacent to vista points to design review established for the Scenic /Visual Corridor Overlay Zone and additional criteria for roads and development (RM 4.9). For roads, the type and physical characteristics of a roadway should be compatible with the natural character of the respective corridor and with the scenic highway function. For development, projects should be set back from bases of bluffs and bluff or ridge top silhouette lines, leave floodplains open, and provide unobstructed view corridors from the scenic highway. 4.4.2 ENVIRONMENTAL EFFECTS Alterations in landform are significant if steep slope ( >25 %) encroachment exceeds allowances, there are extensive graded banks higher than 30 feet, distinct natural features are substantially modified, and /or there is a substantial overall physical change in topography. Aesthetic impacts are significant if landmarks or scenic vistas are blocked from public view, scenic vistas are degraded for the public, significant alterations in landform are noticeable to the public, or structural or landscape features severely contrast with the surrounding structural and vegetative character. The Specific Plan design is generally responsive to the topographic constraints of the site. Land uses requiring relatively flat areas are located where there are similar existing landforms. Other uses are sited and /or clustered with respect for topographic conditions. Steep slopes are for the most part preserved as open space. Overall grading will be moderate and the basic topography and distinct features of the site will remain intact. Scenic vistas will be maintained and structural and landscape features will harmonize with the surrounding character. However, significant landform alteration, and visual quality impacts are identified in certain locations. Landform Alteration As noted in the previous subsection entitled Hydrology and Grading, grading volume for implementation of the Specific Plan will be moderate with 2,142,230 cubic yards of balanced cut and fill. This will be equivalent to 4330 cubic yards per graded acre or 2512 cubic yards per acre for the entire site. Overall, there will not be a substantial physical change in the dominant mesa, bluff, valley, finger canyon, and ridge landforms of the site. Various localized areas where graded banks will exceed 30 feet in height have been identified which are considered individually extensive. With both Land Use Plans A and B the largest contiguous area with high banks, about 6.7 acres, will be in Green Valley along Via Cantebria next to the regional commercial district. Next in contiguous areal extent will be the Leucadia Boulevard bluff cut with 3.8 acres between Green Valley and the upper mesa. Although of less acreage and somewhat fragmented, there will also be extensive high banks where the Via Cantebria extension into Green Valley skirts the bluff, and where Quail Gardens Drive cuts through a ridge to connect to Quail Hollow Drive in the Quail Hollow East planning area. There will also be three separate areas near the golf course holes 14 and 15 in the northwestern finger canyons of Quail Hollow East and North Mesa which are close enough to be considered extensive. Finally, there will be extensive high banks associated with single family development in Quail Gardens East. 4 -34 Steep slope encroachment for both Land Use Plans A and B will exceed the 10% allowance for the site. The largest area of encroachment for both plans will be two close blocks totaling 16.1 acres associated with golf course holes 14 and 15 in the Quail Hollow East and North Mesa planning areas. The next largest block will be about 8.4 acres of single family development between golf course holes 14 and 15. Other steep slope encroachment will mostly occur at the Leucadia Boulevard bluff cut, where Via Cantebria extends along the bluff into Green Valley, and where Quail Gardens Drive cuts through a ridge to connect with Quail Hollow Drive in the northwest corner of the site. There will also be some steep slope encroachment in the Quail Gardens East planning area associated with single family development and the local street to the upper mesa. An additional impact to individual distinct natural features will be substantial modification of the Encinitas Creek floodplain and channel. With both Land Use Plans A and B development will intrude into the 25.5 acre floodplain. The largest area of encroachment will be 15.7 acres of recreational facilities, primarily consisting of ball fields, and channel improvements. Second in areal extent will be 7.3 acres of the regional commercial center. Mixed use will occupy 0.6 acres while roads will intrude into 1.9 acres. Although the streambed will remain open it will be relocated to the east closer to E1 Camino Real. The Cottonwood Creek tributary in Quail Gardens canyon will be maintained in open space. Visual Quality Implementation of the Specific Plan will have little effect on distant views of the site. From Aviara, La Costa, and Olivenhain with both Land Use Plans A and B there will be no view blockage. The bluff face and ridge line will appear to be intact with minor daylight cuts along the bluff top not noticeable. Although portions of the pine and eucalyptus windbreak will be removed, similar trees incorporated into the golf course landscape will preserve the basic wooded character of the ridgeline. Because of the golf course location no structures will be visible along most of the ridgeline. Rooftops of the single family dwellings in Quail Hollow East planning area may be visible. However, individual lot landscaping will partially screen the structures from view. From Aviara and La Costa the open fields in Green Valley will be replaced with buildings and parking lots of the regional commercial center. This will be a distant, but noticeable change in the visual character of the valley. With clustering of the structures and landscaping throughout the parking lots the scene will not severely contrast with the surroundings. To the west close views will not be blocked with Land Use Plans A and B. From Skyloft and Rainbow Ridge the scrub covered upper finger canyons and cultivated fields on the ridge tops will be transformed into a wooded golf course. The lower canyon areas will remain intact. Although somewhat different in visual character, this landscape will be pleasant to the eye. Clustered single family dwellings will be visible in the background but not restrict the open nature of the scenery. There will be a noticeable significant change in the landform. The finger canyons will be shortened with fill banks and intervening ridges lowered and widened to accommodate the golf course. From Ocean View the cultivated fields in the midground will be replaced by mixed uses with both land use plans. These uses may take the form of an amphitheater and community services buildings or clustered multi - family structures. With Land Use Plan A the background will be transformed from greenhouses to a school and mixed uses. The mixed uses may include clustered commercial and office buildings, and multi - family structures. With Land Use Plan B the background will remain the same. Because the surroundings are visually diverse the school and mixed uses will blend in easily. To the south close views from the Stratford and Camino La Orchida neighborhoods will not be blocked. Greenhouses on the Thornton property will be replaced with single family dwellings. With Land Use Plan A some of the open agricultural 4 -35 fields of the Specific Plan area will be replaced with greenhouses while other fields remain intact. With Land Use Plan B the fields will be partially transformed to a school and single family dwellings in the background. In either case the change will be visually similar to the surroundings and not degrade the view. To the east close views from E1 Camino Real between La Costa Avenue and Olivenhain Road, and the Levante neighborhood will not be blocked. Where the site can be seen through the riparian forest, the bluff face and ridge line will appear intact. Trees of the golf course will preserve the basic wooded character of the ridgeline. Much of the ridgeline will be free of structures and landscaping will screen the single family dwellings in Quail Hollow East planning area from view. Buildings and parking lots of the regional commercial center will replace the open fields in Green Valley. The change in visual character of the valley will be noticeable, but clustering of the structures and landscaping in the parking lots will result in a view similar to the surrounding developed commercial areas. Immediate views from the north will not be blocked. Along Saxony Road and from the Quail Gardens neighborhood much of the scrub covered finger canyons and cultivated ridge and mesa top will be replaced by a wooded golf course. This will be a pleasant scene. Although the scenery will be relatively unchanged the alteration in landform by the golf course will be noticeable. The immediate view from Foxpoint to the west will be similarly affected. From Sidonia Street north of Leucadia Boulevard the greenhouses will be replaced with single family dwellings. From Sidonia Street south of Leucadia Boulevard the cultivated fields on the mesa top in the foreground will be replaced by single family dwellings. Cultivated fields in the near background will be replaced by a golf course. With Land Use Plan A the far background will remain in cultivation while with Land Use Plan B it will be transformed to a single family neighborhood. The view of the golf course may be partially blocked by structures depending on the final lot elevations. The homes in the foreground might degrade the scenic vista for some viewers. Where visible, the golf course will be similar to the fields in visual character. With individual lot landscaping the single family neighborhood beyond will not be unpleasant to see. The public and private views from this location are limited to a few homes and one block length of street. To the south from Quail Gardens Drive the view will not be blocked. With Land Use Plan A the open cultivated fields will be mostly replaced by single family residences with some community uses on the west side of the roadway. The community use area may be utilized for an expansion of the adjacent Quail Botanical Gardens. With Land Use Plan B the transition will be from fields to primarily community uses with some single family dwellings to the northeast. Community uses could take the form of a library, museum, or other civic use. The old ranch buildings might be preserved in place as part of a museum under the community use scenario. With both land use plans the open swale along the east side of the street will remain as an open drainage. Again, there will be a change in visual character but not one that is unpleasant to the eye. From Quail Botanical Gardens the view might be partially blocked. With both Land Use Plans A and B adjacent greenhouses may be replaced with community uses. If the pad elevation is raised by grading, buildings could obstruct portions of the view from the garden ground level. For some viewers these buildings might degrade the scenic vista. From the observation tower the view will remain unobstructed. It is noted that among the community use options is expansion of the Gardens in this location. With both land use plans the midground view of cultivated fields on the mesa will be replaced by a golf course. With Land Use Plan A there will be agricultural fields beyond while with Land Use Plan B single family homes will be seen. In the background single family dwellings will be visible near the horizon. As elsewhere, the visual changes will not be unpleasant. 4 -36 Immediate views from the east along E1 Camino Real and in the Garden View, Mountain Vista, and Amargosa neighborhoods will not be blocked. As indicated in the cross sections presented on Figure 4 -14, the bluff and ridgeline will be visible from all vantage points. With both land use plans the bluff and ridgeline will remain visually intact. With Land Use Plan A agricultural use on the mesa top will continue and any structures set back far enough from the ridgeline so as not to be visible. With Land Use Plan B single family dwellings will also be set back from the ridgeline and where the windbreak is removed individual lot landscaping will screen structures from view. The Leucadia Boulevard alignment up onto the mesa top is located in an open ravine with steep cuts through the bluff to be compatible with the rugged physical characteristics of the immediate area. On the valley floor the open cultivated fields will be replaced with mixed uses, the regional commercial center, and parking lots. Buildings will be set back from the base of the bluff with Via Cantebria between. Mixed uses will be in the form of townhomes, apartments, shops, and offices arranged as a small village. The commercial center buildings will be clustered, and surrounding parking lots extensively landscaped. There will be an open channel for the Encinitas Creek tributary. Along the channel where the mixed uses and commercial center join there will be recreational ball fields in a park like setting. Although the development will be similar to surrounding commercial and office areas there will be a noticeable change in the visual character of the valley. The commercial center and mixed use buildings might degrade the scenic vista for some viewers. A computer visual simulation of the regional commercial center and Leucadia Boulevard extension has been prepared by Planning Systems (1993). From a vantage point shown on Figure 4 -15, before and after views are presented on Figure 4 -16. The vantage point is on Olivenhain Road with the view looking west across the intersection with E1 Camino Real. A crossing over Encinitas Creek is in the foreground, the commercial center in the midground, and the Leucadia Boulevard extension up onto the mesa in the background. Landscaping along the roadway will have a tremendous effect on the view. The simulation indicates that street trees will be major obstructers of the commercial buildings. Median plantings along the boulevard and additional trees within the parking lots of the commercial complex were not included in the simulation. With these plantings the buildings will be almost completely blocked from view. However, the bluff grading for Leucadia Boulevard will be distinctly visible in the background. A visual simulation of the improvements to Leucadia Boulevard between I -5 and Sidonia Street has also been generated. From a vantage point on the boulevard near Passiflora Avenue looking west shown on the previously presented Figure 4 -15 the before and after views are presented on Figure 4 -17. The trees indicated are relatively small, yet mature specimens. They are modeled at approximately 25 feet wide by 30 feet tall with 60 foot on center spacing along Leucadia Boulevard. Again, street trees will be major obstructers of the residences and sound walls. In both this and the above case, the views are static and individuals experiencing the actual views will change their vantage points, object of view, and focus rapidly as they pass by. A second above ground water tank could be constructed at the Olivenhain Municipal Water District Wanket reservoir site on the mesa top. The existing tank can be seen from various vantage points around the plan area. Views would be of two tanks rather than one. Architectural and Landscape Character The Specific Plan Design Guidelines provide an impression of the architectural and landscape character for development of various uses in the Specific Plan area. The Architectural Guidelines deal with building massing, colors, materials, and roof lines. In regard to massing, wall planes will vary and include architectural detailing, long expanses of blank walls will be avoided, linear buildings will have architectural projections or recessed areas, these and other buildings will also have vertical articulation such as towers and parapets. 4 -37 (E66T) V/ � OEI15 D%/VE ' � I Z �__�- -. - - -i �- - --� LLI V) W O 0 U b W C u I I W I Iz I W I � I Z I I jo 1 I � I � - I I � I � I � I 0 0 N / I I I t I i � a c o O 0 0 1= Q I= p0 I (J j= o ! ! 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L �- -- _ \ . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................. .......................... ........................... .......................... ........................... .......................... .. ............................... ... ............................... ......... ............................... . . . • . EfVCINIT.4S F{:gtJCH . V E V C/ PONT LOCAMON1,133 Figure 4 -15 Visual Simulation Vantage Points Source: Planning Systems (1993) 4 -39 Building masses will be small and varied in form and large expanses of similar rooflines will be avoided. For roofs, roof lines will be varied and pitched roofs preferred over flat roofs. Mansard roofs will be discouraged on commercial, office, and other mixed use buildings in favor of flat roofs with parapets. Brightly colored or reflective materials will be discouraged and rooftop equipment screened from view. In regard to materials and colors natural building materials such as brick, stucco, terra cotta, stone, tile, and wood will be encouraged. Colored roof tiles will be limited to subtle colors while building colors will be coordinated with those of adjacent structures. The Landscape Guidelines include development zones and streetscape plantings, golf course landscaping, edge conditions, streetscenes, recreational zones, entries, slope plantings, and a landscape planting palate. The Specific Plan area will be extensively landscaped with trees, shrubs, and other plant materials. Special consideration will be given to drought tolerant and native plants where appropriate. Particular guidelines are included for the Green Valley Planning area. For the regional commercial center small building masses will be located near E1 Camino Real and Leucadia Boulevard while large building masses will be set back from and face these major streets. Small stores and business will be clustered. A community theater with an 85 foot high fly tower could be included in one of these clusters. An 80 foot sign tower may be included in the complex near the Woodley Road entrance. Large buildings of the commercial center will have different colors and materials for visual diversity. There will be towers, parapets, arcades, and overhangs at entrances and corners. Parking lots will be situated to minimize vehicular movement between uses. Mixed uses will be arranged in a village setting. Buildings with long expanses of blank walls will be avoided while covered arcades and awnings will be encouraged. Building entrances will face major pedestrian routes. The multi- family developments will be related to surrounding streets and have interior common open space facilities. Landscaping will include a major entry feature /monument at the E1 Camino Real intersection with Leucadia Boulevard and minor entry features at other entrances to the commercial center. Trees will be planted throughout parking lots and the lots screened from the view of passing motorists with berms and landscaping. The Design Guidelines are intended to provide a method for achieving a high quality, aesthetically cohesive environment in the Specific Plan area. With their implementation architectural and landscape features will not severely contrast with the surrounding structural and vegetative character. 4.4.3 MITIGATION MEASURES Landform Alteration The Encinitas Municipal Code Sec. 23.24 (Grading ordinance) regulates cuts and fills and requires rounding and blending of slopes as well as requires planting of slopes. The regulations are described in detail in the preceding subsection entitled Hydrology and Grading. Additional mitigation measures are also set forth in that subsection including limitation of graded bank height to 30 feet where feasible, and contour grading for all banks exceeding 15 feet in height. The regulations and measures together will reduce extensive high bank impacts to a level of insignificance. Encroachment of steep slopes in excess of the 10% allowance cannot be mitigated without redesign. An alternative which withdraws grading from steep slopes in the Quail Hollow East and North Mesa planning areas would adequately reduce encroachment. Modification of the Encinitas Creek floodplain and channel also cannot be mitigated without redesign. An alternative to adequately reduce intrusion would be one that withdraws development from the floodplain. There is 4 -40 also the option to amend the General Plan to exempt such intrusion. Both redesigns are discussed in the following section entitled Alternatives to the Proposed Action. Visual Quality The Specific Plan Zoning Ordinance, Single Family Residential Zones, Sec.6.5.2, Development Standards limit building heights to twenty -two (22) feet or two (2) stories and to thirty (30) feet with Design Review. Minimum lot sizes are 10,000 square feet for the ERSFRI Zone and 5,000 square feet for the ERSFR2 Zone. Front and rear yard setbacks are 25 feet and 20 feet respectively. Interior side yard setbacks are 10 feet for ERSFRI and 5 feet for ERSFR2. There are strict controls for accessory structures, walls, and fences. The Multi- Family Zone, Sec.6.6.2. Development Standards limit building heights to forty -five (45) feet or three (3) stories. Minimum lot size for the ERMFR Zone is 20,000 square feet and all yard setbacks are 10 feet. Strict controls are applied for accessory structures, walls, fences, auxiliary structures and equipment, storage, p arkin g. and landscaping. Mixed -Use Zones, Sec.s 6.7.2 and 6.8.2, Development Standards limit building heights to forty -five (45) feet, or not to exceed three (3) stories. Minimum lot area is 10,000 square feet. No front and rear yard setbacks are required for the ERMU1 Zone. Front and rear yard setbacks for the ERMU2 Zone are 20 and 15 feet respectively. Interior side yard setbacks for both zones are 10 feet. There are site planning requirements and strict controls for accessory structures, auxiliary structures and equipment, storage, outdoor open space, and parking. These zones also have regulations for walls and fences, refuse collection areas and loading docks, and lighting. Landscaping requirements include minimum planted areas, screens, and front and street side yard plantings. commercial Zone, Sec. 6.9.2, Development Standards limit building height to forty -five (45) feet, not to exceed three (3) stories. Minimum lot area is 10,000 square feet. The front yard setback is 20 feet while the interior yard set back is 10 feet. There is no rear yard setback for this zone. There are strict controls for accessory structures, auxiliary structures and equipment, storage, outdoor open space, and parking. This zone has regulations for walls and fences, refuse collection areas and loading docks, _nd lighting. Landscaping requirements include minimum planted areas, screens, and front and street side yard plantings. The Specific Plan General Planning Standards for the North Mesa planning area require landscape screening around the water tank facility to visually separate and screen tanks from surrounding areas. The Specific Plan also requires Design Review for all development in the Specific Plan area. Design review will be focused on the Specific Plan Design Guidelines. The Zoning Ordinance Regulations together with General Planning Standards and Design Review will ensure that impacts to visual quality will not reach levels of significance. 4.5 BIOLOGICAL RESOURCES A biological survey of the Encinitas Ranch Specific Plan area has been conducted by Sweetwater Environmental Biologists (1993). The survey includes vegetation communities and fauna, sensitive biological resources, regional importance, impacts, and recommendations for mitigation. A copy of the report, labeled Appendix D, is included with other technical appendices to this document. Content of the report is summarized in the following discussion. 4.5.1 EXISTING CONDITIONS Vegetation Communities Thirteen vegetation types occur in the study area. In addition, there are large areas of the site that are developed as commercial nurseries and field floriculture. Vegetation types are mapped on Figure 4 -18 with their areal extent 4 -43 listed in Table 4 -4. A brief description of the vegetation types follows. One hundred thirty -seven plant species, 29 of which are non - native, are known to be on the site. Table 4 -4 Vegetation Types and Areal Extent Summary Vegetation Type Acreage Site Coverage (AC) (Z) Diegan Coastal Sage Scrub [totaLJ [49.1] [6] California sagebrush sub - association 23.4 3 Lemonade -berry sub - association 21.3 3 Black sage sub - association 2.8 <1 Laurel sumac sub- association 1.4 <1 California adol hia sub - association 0.2 <1 Chaparral [total] [122.9] [143 Southern maritime chaparral 120.0 11 Scrub oak cha arraL 2.9 <1 Woodland [totaLJ [6.13 1<13 Southern willow riparian woodland 6.1 <1 Riparian Scrub [total] [4.3] [03 Southern willow scrub 0.8 <1 Mulefat scrub 1.5 <1 Southern riparian scrub 2.0 <1 Marsh [total] [3.2] [ <1] Coastal and valley freshwater marsh 2.1 <1 Disturbed wetland 1.1 <1 Grasslands [total] [4.2] [ <1] Non - native grassLand 4.2 <1 Other [total] [663.0) [783 Ornamentals (Eucal)Ftus & Torrey Pine 12.9 2 Pond 5.1 <1 Developed 97.9 11 Cultivation 503.2 59 RuderaL 42.6 5 Stream channel 1.3 <1 Specific Plan 852.8 100 Source: Sweetwater Environmental Biologists (1993) Scrub Communities Diegan Coastal Sage Scrub (map symbol - DCSS) Diegan coastal sage scrub is classified into several subtypes or sub - associations based on the dominate species. Subtypes that occur on the site include California sagebrush dominated scrub, lemonade berry dominated scrub, laurel sumac dominated scrub, black sage dominated scrub, and California adolphia dominated scrub. The Diegan coastal sage scrub is generally of high quality and located primarily on the west and east facing slopes of the north to south mesa on the site. In the northwestern portion of the site lemonade berry dominated sage scrub predominates on the north facing slopes, while California sagebrush dominated scrub predominates on the south facing slopes. The sage scrub in these locations appears to be a climax community. On the east facing slopes of the mesa the scrub seems to be a seral community. 4 -44 i 111 I .+..-- • - - - - -- (�' 1 I � 1,1'1 1 ' , II OnY _ -- - �1 ]n, I j. alna 0 -Ont I , .601 I i)Y I ,III Ins sina Ono I Y -ffa9 III 9nY On. nna i ant D -ant I l -66806 anY ilna 1iM ina ---•� -anno , .I I+ ', I �� r -n5D 9n• � VV f �onY '� 1 on. 11 4- 1 Dwc. 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I h II r, 'l I �t orr �� o,•, jI i 1 'I 7i .. 1 I ,i,� f'�:o , �•� I X11 cr . I i I I I I I ��a••o /7 ,e• all • // I I i `I ... 0 The coastal sage scrub on the site is generally of high quality and contiguous with additional scrub west of the western boundary. The offsite scrub is more disturbed and is not of as high a quality as that on -site. Diegan coastal sage scrub occupies approximately 49.1 acres (6%) of the site. Of this total California sagebrush and lemonade berry are the most widely represented sub - associations covering 23.4 and 21.3 acres respectively. Chaparral Communities Southern Maritime Chaparral (map symbol - SMC) Southern maritime chaparral is the dominant natural vegetation type on the property. Dominant species include wart - stemmed D 1 °t Mar (Ceanothus verrucosus), chamise (Andenostoma fasciculatum), (Arctostaphylos glandulosa spp. crassifolia), Nuttall's scrub oak (Quercus dumosa) , and summer holly (Comarostaphylis diversifolia ssp. diversifolia). This chaparral is generally limited to the east facing slopes of the north to south mesa. Southern maritime chaparral is highly restricted and sensitive habitat and one of the most significant biological resources on the property. The chaparral is contiguous with a large block of similar habitat offsite to the north. Approximately 120.0 acres (14 %) of the property is covered by southern maritime chaparral, of which about 6.9 acres is disturbed. The chaparral on the site represents approximately four percent of the total for the remaining community in Southern California. The bluff area off site contains 91 acres of southern maritime chaparral making the total localized contiguous block at least 220 acres. Scrub Oak Chaparral (map symbol - SOC) Scrub oak chaparral on the site is dominated almost exclusively by Nuttall's scrub oak (Quercus dumosa), with toyon and lemonade berry as minor constituents. h southern maritime chaparral on both the The scrub oak occurs in a matrix wit east and west facing slopes of the mesa, usually in steep mesic drainages. The community is best represented along the drainages on east facing slopes directly west of E1 Camino Real at Olivenhain Road. Approximately 2.9 acres ( <l %) occur on the property. Riparian Communities Southern Willow Riparian Woodland (map symbol - WRW) Southern willow riparian woodland is found at the confluence of Encinitas Creek and its tributary to the south paralleling E1 Camino Real. This woodland is dominated by arroyo willow (Salix lasiolpis var. bracelinae) in association with narrow- leaved willow (Salix exigua). The southern willow riparian woodland represents the southern boundary of a large contiguous block of riparian vegetation along Encinitas Creek to the north. The on site woodland constitutes about 6.1 acres ( <l %) of the property. Southern Riparian Scrub (map symbol - SRS) What is best described as southern riparian scrub is found in one drainage in the northwestern portion of the site. The community contains a mixture of riparian and non - riparian species that cannot be convincingly classified as either southern willow scrub or mulefat scrub. Dominant species are Mexican elderberry (Sambucus mexicana), poison oak (Toxicodendron diversiloba), and giant wild rye (Leymus condensatus). This habitat covers approximately 2.0 acres ( <l %) of the site. 4 -46 Southern Willow Scrub (map symbol - SWS) Southern willow scrub occurs along t;.- south to north flowing tributary to Encinitas Creek. The scrub is along mos_ of this stream from the confluence near Olivenhain Road south to a concrete channel near the south boundary. The community is dominated by arroyo willow and mulefat (Baccharis salicifolia). About 0.8 acres ( <I %) of the property supports southern willow scrub. Mulefat Scrub (map symbol - MFS) Mulefat scrub is found along the bottom of an abandoned water detention facility in the southern portion of the site. This community is dominated by mulefat and occupies approximately 1.5 acre (<1 %) of the site. Marsh and Emergent Wetland Communities Coastal and Valley Freshwater Marsh (map symbol - CVFWM) Coastal and val_ -_y freshwater marsh is restricted to the periphery of two ponds along the southwestern boundary, along a blue line stream just below the upper pond, and in drainages of Magdalena Ecke park. Approximately 2.1 acres ( <1 %) of marsh are on the site. Another 1.1 acres along the drainage flowing south from greenhouses to the northern pond is classified as disturbed wetland. One acre of disturbed wetland is located along the periphery of the southern willow riparian woodland. Cat -tails (Typha sp.), coastal isocoma (Isocoma menziesii var. vernonioides), curly dock, and western rag weed (A•.rosia psilostachya) make up the floral composition of this community. Ornamental Plantings Torrey Pine (map symbol - PT) A few hundredcrrey pines (Pinus torreyana) have been planted on the property as a windscreen and for aesthetic purposes. They occur along the eastern edge of the north to south mesa and around the slopes of the northern most pond. Torrey pines occupy about 4.5 acres of a total 12.9 acres of ornamental trees on the site. Eucalyptus (map symbol - EUC) Several hundred eucalyptus (Eucalyptus e,.) have ' -so been planted on the property for windscreen and aesthetic purposes. The s;reens are found along the eastern edge of the mesa, along tI.e western border, beside portions of the stream along E1 Camino Real, and around various structures. About 8.4 acres of the property are planted with eucalyptus. Grassland Communities Non - native Grassland (map symbol - NNG) Non - native grassland occurs as a mosaic with the Diegan sage scrub in the northwestern portion of the site. Characteristic species include oats (Avena Bp.), red brome (Bromus madritensis spp. rubens), and mustard (Hirschfeldia incana). This grassland occupies approximately 4.2 ages ( <l %) of the property. Ruderal Vegetation (map symbol - RUD) Areas on the site used for disposal of ornamental cuttings, clearings for storing equipment, and fallow fields support non - native weedy species. Ruderal areas are adapted to a regime of frequent disturbance and tend to be dominated by forbs rather than grasses. Characteristic species include red brome, mustard, and Russian thistle (Salsola tragus). 4 -47 Fauna All animal species, native and non - native are included in the survey. Primary focus is on vertebrates with attention to birds and reptiles. Invertebrates Eleven species of invertebrates were observed on the property. The two phyla Mollusca and Arthropoda are probably the most well represented. Four arthropod groups tend to dominate in terms of numbers including crustaceans (shrimps, crabs, crayfishes) , myriapods (centipedes, millipedes), arachnids (spiders, scorpions), and insects. Vertebrates Seventy -three vertebrate species were identified including two fishes, three amphibians, three reptiles, 59 birds, and six mammals. Fish Fish are represented by two non - native species of bluegill (Lepomis macrochirus) and mosquitofish (Gambusia affinis affinis) in the Encinitas Creek tributary along E1 Camino Real. Amphibians Three amphibians were observed including Pacific chorus frog (Pseudacris regilla), California toad (Bufo boreas halophilus), and bullfrog (Rana catesbiana) . The California slender salamander (Batrachoseps attenuatus) may be present on the property. Reptiles Reptile species are represented by the western fence lizard (Sceloporus occidentalis), side - blotched lizard (Uta stanisburiana), and orangethroat whiptail (Cnemidophorus hyperythrus beldingi). Several other species are expected to occur such as the San Diego horned lizard (Phrynosoma coronatum blainvillei), and southern pacific rattlesnake (Crotalus viridis helleri). Birds Fifty -nine species of birds were observed on the property. Various types of waterfowl are represented such as grebes, herons, and ducks. Several kinds of hawks, and numerous types of tyrant flycatchers, warblers, and sparrows were also seen. Mammals Six mammal species are represented including coyote (Canis latrans), bush rabbit (Sylvilagus bachmani), desert cottontail (Sylvilagus auduboni), Botta's pocket gopher (Thomomys bottae), and dusky- footed woodrat (Neotoma fuscipes). The pocket gophers were found using all habitats while the rest of the mammals were restricted to shrublands and riparian areas. A number of small rodents could also occur such as desert woodrat (Neotoma lepida intermedia), Dulzura California pocket mouse (Chaetodipus californicus femoralis), and pacific kangaroo rat (Dipodomys agilis). Sensitive Habitats Sensitive habitats are those considered rare within the region, considered sensitive by the California Department of Fish and Game (CDFG), and /or listed as sensitive by the County of San Diego. 4 -48 Diegan Coastal Sage Scrub Diegan coastal sage scrub is considered sensitive habitat by several resource agencies because it supports a number of federal and state endangered, threatened, and rare plants, as well as several bird and reptile candidate species for federal listing. Loss estimates in California range from 36 to 85 percent. Historical reduction of sage scrub in San Diego County is on the order of 72 %, due primarily to urbanization. Southern Maritime Chaparral Southern maritime chaparral is considered sensitive by the County of San Diego and CDFG because of its scarcity and high number of sensitive species. This habitat is almost entirely restricted to the coastal fog belt from La Jolla to Carlsbad, with some scattered patches to the south on Point Loma and Spooner's Mesa, and in Penasquitos Canyon. Distribution coincides with some of the most developed areas in this region. Recent mapping efforts by the Multiple Species Conservation Plan (MSCP) and Multiple Habitat Conservation Plan (MRCP) have identified only 3336 acres of southern maritime chaparral extant within San Diego County. In Encinitas the chaparral is found on the subject property and in Lux Canyon, Sienna Canyon, Oak Crest Park, and the north facing slopes just south of Encinitas Creek between E1 Camino Real and Rancho Santa Fe Road. Scrub Oak Chaparral This plant community is included in this survey as a sensitive habitat for several reasons including the anticipated listing of Nuttall's scrub oak as a List 1B species by the California Native Plant Society (CNPS). Scrub oak chaparral may also be viewed as a sub - association of southern maritime chaparral because it occurs in a matrix with this community. The restrictive range of Nuttall's scrub oak also suggests that communities dominated by this species are even more restrictive than those without it. Riparian and wetland Habitats Riparian communities and wetlands are considered sensitive by local, state and federal agencies. Riparian communities are situated along stream courses and adjacent banks. The wetland habitats on the property are southern willow riparian woodland, southern willow scrub, coastal and valley freshwater marsh, mule fat scrub, and disturbed wetlands. Because of their proximity to stream courses, the southern willow riparian woodland and southern willow scrub are also considered riparian habitats. The southern riparian scrub community is not considered a wetland. Wetland habitat is naturally limited and beneficial to migrant birds. Other important functions include wildlife movement, and surface water and an insect prey base for many species of fish, amphibians, reptiles and birds. Wetland habitat also harbors aquatic animals and supports many rare and endangered species. Freshwater marsh in San Diego County has been reduced by 91 percent since the pre- European era. Riparian habitat is specifically addressed by the CDFG Code (Sections 1600 - 1606). Current estimates of riparian habitat reduction in Southern California floodplain areas run as high as 97 percent. Sensitive Plants Sensitive plants include those listed, or are candidates for listing, by the US Fish and Wildlife Service (USFWS), CDFG, and CNPS. Eleven sensitive plant species were detected on the site. Sensitive plant locations are mapped on Figure 4 -19 with a brief description of each species to follow. 4 -49 Encinitas baccharis ( Baccharis vanessae) (map symbol - Bv) [USFWS: Proposed Endangered (Oct. 1993) ; CDFG: Endangered; CNPS rating: List 1B, R -E -D 2 -3 -31 Encinitas baccharis is limited to a few highly restricted populations and is endangered throughout its range. Known locations for this species are in Encinitas, Mt. Israel /Del Dios, Mount Woodson and Carmel Mountain Ranch near Poway, east Mira Mesa, Rancho San Bernardo, Rancho Cielo near Rancho Santa Fe, and Devil Canyon in the San Mateo Canyon Wilderness Area of the Cleveland National Forest. Encinitas baccharis occurs in both southern maritime chaparral and southern mixed chaparral and is associated with chamise and wart - stemmed ceanothus. Six populations totaling approximately 49 individuals of this plant are found on the site in southern maritime chaparral on east facing slopes on the north to south mesa. The largest population contains 30 individuals. Del Mar manzanita (Arctostaphylos glandulosa spp. crassifolia) (map symbol - Ag) [USFWS: Proposed Endangered (Oct. 1993); CNPS rating: 1B; R -E -D 3 -3 -2] This species is restricted to coastal San Diego County. Reported localities are Encinitas, Rancho Santa Fe, Del Mar, and Torrey Pines State Reserve. A significant metapopulation is known from Carlsbad. Del Mar manzanita occurs in, and is one of the indicators of southern maritime chaparral. Fifty -six populations totaling approximately 1383 individuals of Del Mar manzanita occur in southern maritime chaparral on east facing slopes of the mesa on the site. Most of the populations consist of only a few individuals but there are two large populations containing 400 and 500 plants. Del Mar sand aster (Lessingia filaginifolia var. linifolia) (map symbol - Cf) [USFWS: Proposed Threatened (Oct. 1993); CNPS rating: List 1B, R-E -D 3 -2 -3] Del Mar sand aster is a San Diego County endemic restricted to a few disjunct populations near the coast between Los Penasquitos Canyon and Encinitas and possibly Carlsbad. Twenty -nine populations of about 6805 individuals of this plant are found on the site within southern maritime chaparral on east facing slopes of the north to south mesa. The largest population contains approximately 2500 individuals with three other populations of about 1000 each. Torrey pine ( Pinus torreyana) (map symbol - Pt) [USFWS: Candidate (Category 2); CNPS rating: List 1B, R -E -D 3 -2 -3] Torrey pine is the most restricted pine species in California. It occurs only along the coast near Del Mar and on Santa Rosa Island. On the mainland Torrey pine is found around the mouth of Soledad Canyon extending to the northern edge of Del Mar and inland about 1.5 miles. It has also been reported in the San Dieguito Valley. Torrey pines are found in Torrey pine woodlands and southern maritime chaparral. Several hundred individuals have been planted on the site. Some Torrey pines have subsequently invaded the southern maritime chaparral and become naturalized. Approximately 225 individuals occur on the property. Summer -holly (Comarostaphylis diversifolia spp. diversifolia) (map symbol - Cd) [USFWS: Candidate (Category 2); CNPS rating: List 1B, R -E -D 2 -2 -2] Summer -holly is found in scattered locations at lower elevations from foothills to the coast in Orange and San Diego counties and into Baja California. Localities reported for San Diego County are the San Marcos Mountains, Mount Whitney, Rancho Santa Fe, Encinitas, Mount Soledad, Penasquitos Canyon, Del Mar Heights, Iron Mountain, Mission Valley canyons, Jamul Valley, and Otay Mountains. Approximately 799 individuals of this plant in 35 populations occur in southern maritime chaparral on east facing slopes of the mesa and in drainages and north facing slopes of the site. The largest population contains approximately 200 individuals. 4 -51 Nuttall's scrub oak (Quercus dumosa) (map symbol - Qd) [CNPS rating: List 1B, R -E -D 2 -2 -3] This species is found in coastal southern California from near Point Conception in Santa Barbara County south into Baja California. It is a newly defined taxon hard to distinguish from the closely related scrub oak. Thirty -five populations totaling 1188 individuals are*on the site in southern maritime chaparral and scrub oak communities. The largest population contains about 300 individuals with several populations of over 100 plants each. Wart - stemmed ceanothus (Ceanothus verrucosus) (map symbol - Cv) [USFWS: Candidate (Category 2); CNPS rating: List 2, R -E -D 1 -2 -1) This species is restricted to western San Diego County and Baja California. Reported localities in San Diego County are Agua Hedionda, Encinitas, Leucadia, Torrey Pines State Reserve, Kearny Mesa, Lake Hodges, and Point Loma. The plant is found in several chaparral types and is one of the indicators of southern maritime chaparral. Approximately 1244 individuals in 61 populations occur on the site in southern maritime chaparral on east facing slopes on the mesa and in drainages and north facing slopes. California adolphia (Adolphia californica) (map symbol - Ac) [CNPS rating: List 2, R -E -D 1 -2 -1] Adolphia is restricted to western San Diego County and northwestern Baja California. Reported localities in the County include Morro Hill, Agua Hedionda, Rancho Santa Fe, Mount Soledad, Rancho Bernardo, Chollas Valley, Barrett Junction, Proctor Valley, and Otay. A significant metapopulation is known from Carlsbad. This species occurs on clay soils in dry canyons and washes in coastal sage scrub and chaparral. Approximately 578 individuals in 17 populations occur in Diegan sage scrub in the northwestern portion of the site. Three populations contain 100 individuals each. Palmer's grappling -hook (Harpagonella palmeri var. palmeri) (map symbol - Hp) [CNPS rating: List 2, R -E -D 1 -2 -1] This species is found in Los Angeles, Orange, Riverside, and San Diego counties, on San Clemente Island, in Arizona, Baja California, and Sonora, Mexico. Reported localities in San Diego County are Guajome Mesa, Rancho Santa Fe, Olivenhain, Poway Grade, Kearny Mesa, Emerald Hills, Mission Gorge, Otay, Dehesa, Rice Canyon, Table Mountain, and Box Canyon. It is also known from Carlsbad. Palmer's grappling -hook occurs on clay soils in annual grasslands and coastal sage scrub at lower elevations. Three populations totaling 550 individuals occur in the northwest corner of Magdalena Ecke park. The largest population contains approximately 500 individuals. Western dichondra (Dichondra occidentalis) (map symbol - Do) [USFWS: Category 3c; CNPS rating: List 4, R -E -D 1 -2 -1] Western dichondra is found from Santa Barbara County to Baja California, and on San Miguel Island. In San Diego County this species occurs north to Agua Hedionda and La Costa and south to the border. It occupies dry, sandy banks in coastal sage scrub, chaparral, or southern oak woodland. Several small populations are found within sage scrub and chaparral in Magdalena Ecke park. Ashy spike -moss (Selaginella cinerascens) (map symbol - Sc) [CNPS rating: List 4, R -E -D 1 -2 -1) This species is restricted to Orange and San Diego counties and northwestern Baja California on flat mesas in coastal sage scrub and chaparral. Ashy spike -moss is scattered throughout Diegan sage scrub and southern maritime chaparral on the site. 4 -52 Sensitive Animals Sensitive animals are species or subspecies listed by the USFWS and /or CDFG. Five sensitive animal species were detected on the site. Sensitive animal sighting localities are shown on the previously presented Figure 4 -19 with brief descriptions of each species to follow. Orangethroat whiptail (Cnemidophorus hyperythrus beldingi) [USFWS: Category 2; CDFG: Species of Concern] The whiptail range is from southern Orange County and southern San Bernardino County south to the tip of Baja California. In the U.S. this lizard is restricted to the coastal plain in coastal sage scrub, chaparral, and edges of riparian woodlands and washes. Several individuals were observed on the site in southern maritime chaparral and Diegan sage scrub. This lizard is expected to be fairly common on the site. The study area may contain the largest amount of whiptail habitat left in Encinitas. Coastal California gnatcatcher (polioptila californica californica) [USFWS: Threatened; CDFG: Species of Special Concern] This species is largely confined to coastal sage scrub areas below 1500 feet MSL in Los Angeles, Orange, and San Diego counties and Baja California. Locally, the bird occurs in small numbers in chamise and southern maritime chaparral. Three pair and two juveniles were observed in Diegan sage scrub and southern maritime chaparral on the property. The two juveniles were not paired and did not occupy the site for even one -half of the breeding season. One of the pairs was seen on one occasion but not later during other visits to the property. Cooper's hawk (Accipiter cooperii) [CDFG: Species of Special Concern] Cooper's hawk occurs through the continental United States excluding Alaska, parts of Montana, and parts of the Dakotas. They winter in Mexico and Honduras. In San Diego County they tend to inhabit lowland riparian areas and oak woodlands in close proximity to scrublands or fields. Individuals were sighted foraging on the property during the spring migration period. The sightings are thought to be transitory individuals. Southern California rufous- crowned sparrow (Aimophila ruficeps canescens) [USFWS: C2; CDFG: Species of Special Concern] This coastal species occurs from Santa Barbara in Ventura County southeast through Los Angeles, Orange, Riverside, and San Diego counties to northwestern Baja California. They are found mainly in coastal sage scrub on rocky hillsides and canyons. One individual was observed on the site in the fall and may have been a dispersing juvenile or wandering adult. California horned lark (Eremophila alpestris actia) [USFWS: Category 2; CDFG: Species of Special Concern] California horned lark is restricted to coastal southern California, central California, and the San Joaquin Valley. Habitat for this bird is open coastal plains, fallow fields, alkali flats, and mountain meadows. Individuals and small groups of this species were observed regularly in agricultural areas of the site. The most seen at any one time were approximately 50 individuals on one of the plowed fields. The species likely uses the property as a migrant and winter visitor. Potential Sensitive Species Fifteen sensitive plant species known from the vicinity were not observed on the site. They are Orcutt's spineflower (Chorizanthe orcuttiana), thread - leaved brodiaea ( Brodiaea filifolia), short - leaved dudleya (Dudleya blochmaniae spp. 4 -53 brevifloia), San Diego thornmint (Acanthomintha ilicifolia), sticky dudleya (Dudleya viscida), Orcutt's brodiaea ( Brodiaea orcuttii), Orcutt's Hazardia ( Hazardia orcuttii), Cleveland's golden star (Muilla clevelandii), Blochman's dudleya (Dudleya blochmaniae ssp. blochmaniae), coast barrel cactus (Ferocactus viridescens), San Diego marsh elder (Iva hayesiana), cliff spurge (Euphorbia miseri), San Diego sagewort JArtemisia palmeri), California adder's tongue (Ophioglossum californicum), and spiny rush (Juncus acutus var. sphaerocarpus). Eighteen sensitive animal species known from the vicinity were not observed on the property. They are coastal whiptail (Cnemidophorus tigris multiscutatus), San Diego horned lizard (Phynosoma coronatum blainvillei), Coronado skink (Eumeces skiltonianus interparietalis), coastal rosy boa (Lichanura trivirgata roseofusca), San Diego ringneck snake (Diadophis punctatus similis), red diamond rattlesnake (Crotalus Tuber), burrowing owl (Athene cunicularia), sharp- shinned hawk (Accipiter striatus), northern harrier (Circus cyaneus), loggerhead shrike (Lanius ludovicianus), least Bell's vireo (vireo bellii pusillus), yellow warbler (Dendroica petechia), yellow - breasted chat (Icteria virens), Bell's sage sparrow (Amphispiza belli belli), San Diego desert woodrat (Neotoma lepida intermedia), Delzura California pocket mouse (Chaetodipus californicus femoralis), northwest San Diego pocket mouse (Chaetodpus fallax fallax), and San Diego black - tailed jackrabbit (Lepus californicus bennettii). Regional Importance Vegetation and Plants The southern maritime chaparral on the site is a significant local, regional, and state resource. Only about 3400 acres of this plant community still exist, very little of which is protected. The 120 acres of southern maritime chaparral on the property, and contiguous 91 acres offsite to the north along Green Valley towards Batiquitos Lagoon is one of the largest remaining patches. It is also one of the highest quality. The community on the site is habitat for one state endangered species (Encinitas baccharis) which also has recently been proposed for federal endangered status, one other plant species also recently proposed for federal endangered listing (Del Mar manzanita), and one additional species recently proposed for federal threatened status (Del Mar sand aster). These species along with wart - stemmed ceanothus and Torrey pine, are all MSCP and MHCP target species. Southern maritime chaparral on the property likely supports one of the largest remaining populations of Del Mar manzanita. The site also probably supports the largest remaining coastal population of Encinitas baccharis. Del Mar sand aster on the property represents the majority of this species reported in the region. The substantial populations of wart - stemmed ceanothus and summer holly on the site may be some of the largest extant coastal populations of these species. MHCP models classify most of the southern maritime chaparral and sage scrub occurring on the east facing slopes north of the point opposite Olivenhain Road as very high (highest rating). South of this point the habitat is rated high and very high. The southern maritime chaparral and sage scrub within Magdalena Ecke park is classified as high. The southern willow riparian woodland north of Olivenhain Road in Green Valley is rated very high, while the southern willow riparian scrub along E1 Camino Real south of Olivenhain Road is classified as moderate. Southern maritime chaparral and sage scrub offsite to the north on east facing slopes in Green Valley is also rated very high. Animals The most important animal species on the property is the coastal California gnatcatcher. This bird has recently been placed on the federal threatened species list and is a significant biological resource at all jurisdictional levels. It has been targeted for conservation in the California Natural Community Conservation Planning (NCCP) program, the MRCP, the City of Carlsbad 4 -54 Habitat Management Plan (HMP), and a variety of other local and regional conservation efforts. MHCP models classify coastal sage habitat for the gnatcatcher on the site as very low to high. The Magdalena Ecke park is designated as high. Other areas on the property which support the gnatcatcher have not been recognized by the MHCP models either because they are not sage scrub or they are too small to be considered. The HMP recognizes both coastal sage scrub and southern maritime chaparral as habitat for the gnatcatcher. The HMP also recognizes the importance of maintaining habitat linkages for the gnatcatcher between Batiquitos Lagoon, Green Valley, and areas east of E1 Camino Real. The property is an extension of this planning area. The MHCP establishes a habitat value index for habitats and identifies wildlife corridors between critical resource areas in and out of the MHCP planning area. The bluffs of Green Valley are assigned a very high habitat value index and the lowland riparian area is considered a fundamental linkage between coastal habitats and the sage scrub, chaparral, and grasslands extending east along Olivenhain Road. The riparian corridor connection across E1 Camino Real is tenuous, dependent on a small bottleneck on the east and west sides of the roadway. The woodland on the site is obliquely adjacent to riparian habitats on Encinitas Creek across E1 Camino Real to the east. Upland habitats across the road are more directly adjacent to the offsite riparian woodland and may serve as a better corridor. However, during the night animals may move across the road from the property up Encinitas Creek. 4.5.2 ENVIRONMENTAL EFFECTS Biological impacts are significant if there is substantial sensitive plant community or habitat disturbance or certain encroachment, or substantial sensitive species disturbance or certain percentage loss. Sensitive plant communities, habitat, and species are those listed as such by federal, state, or local resource agencies because of declining, limited, or threatened populations. Approximately 643 acres, or 75 percent of the property has been developed, is in cultivation, or supports ruderal vegetation. The majority of sensitive habitats and species on the site occur in large contiguous blocks and are primarily restricted to steep slopes. However, numerous significant biological impacts identified as follows will occur. Both direct and indirect impacts have been assessed. Direct impacts are those that permanently alter the affected biological resources to the extent that they are not expected to recover. Indirect impacts result from secondary effects such as habitat fragmentation, edge effect, and human intrusion. Vegetation Direct Impacts Direct impacts to plant communities with Land Use Plans A and B will be identical. These impacts are shown on Figure 4 -20 and itemized in Table 4 -5. It is noted that Land Use Plan A differs from Land Use Plan B from the biological perspective only where approximately 81 acres of cultivated fields will be converted with Plan B to a school and single family residences in the South Mesa planning area. Although the loss of these fields will not be individually significant they are foraging habitat for raptors and the cumulative loss of habitat on a regional basis is significant. Because the ponds will remain part of both land use plans it is assumed they will not be impacted. Any type of modification would be considered significant as they are "waters of the U.S." Impacts to the ponds could also impact the freshwater marshes associated with them. Approximately 1.3 acres (100 %) of the channeled portion of the Encinitas Creek tributary along El Camino Real will be 4 -55 w ro 01 >4 H C O .14 ro 4J 41 N U (d 04 E Ln i le (1) .-I ro H 4 -56 ol � 10 L L 0 0 U U m m OD r- r, O, Do M co a a as d d N N m m L L O O LL LL r• N tv'1 O) rn r-I J-1 D1 O -4 O .-I ro 4J c a� C O $4 C W $4 a) ro 3 4.) N O! 3 to U $4 :3 O ril 4) n n n n n n " Im O 0 0 0 0 0 0 0 N N u r N r r r r u N u u u E w � a u v L W Of� J10 N 1O 0 IT e-M 0000 1T OO�T O� 00 0000000 N ' 0 0 0 4 1 0 O O 0000 O O O 00 0000000 O � v u N a O m 00 O O MNM Ito O• Vl NN .T u tip OO 1-0 v% � —Ln N�00 M�Opp Ol fl OI-N l O) 4+ u r u u u .t u O•r-- u r• e- f` U O U v L 0. E o L M NIAOM�10 tANM NN MOD InO OAT 'D 0000 e- ODOO�OOMM r p 0Q 0Oti 0e-�O MME �O �0�� X00 �� -O�Oa- 10 rrn � Q u �^ r•'T M 00 'TN 0�9 C� MOOLn O Nr•� NN OCR 1• NOM OD V OEM r•N a--O NON �O �O PTO N rnN It �T MN VAN MM e� N L v v N N u N N u u u u �0 e- Ol O.t Ln U Q rr u O u v 0 o a N C L m o o v v L 4+m•r co g u 0 u - 0 m W 2 4J 2 00 a 7 0 41 •� 0 Lm ICO d N N L y U) •� O U L m U N L m n 7 U w 'a G N N 1 O 0 m U O. L N C 7 L N m•r t E L 41 w c d) -0 -0 m rn a 0m m �1 y ar N m O m 'L C y U TD O 41 n O u 0 m m m W d O. m L 7 -o •..� H L w U m m •r m 4i L L m -� .0 m M— 7 0. > 4+ N 4+ L O 0) v C >. m d m O 2(p U 4+ 7 L •r r"1 13 S 4J n C C C F 4+ m.0 07 E m 4+ E O 2 L S U L C u N _N -+ O N I O7•r y u Y m 4j u C U N Yn C C m my 4+ L > N •r m m L -m+ O O L 'O 0) L L O 4+ 4+ M U OL N U O m O m 0) "a 4) C 0 m 0! 40+ m� C m 44 0) O> m E U w CY WY- L. CL m.LwL u 4+ 7 m C u E •r L m •r M 4 C• U L •r m -J m 7 L 4+ 7 m 7 L m 4+ — 7 r 41 J 41 L 7 7 N 4+ L �Ipp N � 10 C L C C> -+ -0 L r W O) m u.2 m m 0. 0 U M O m 0 7 0 0 O• N O O! L O W 7 7 4+ U Of W cJJmJU mrnN V ON O_(nS Uf LuC m2 LOaC w=cn W > O 30 C i C7 O N 4 -56 ol � 10 L L 0 0 U U m m OD r- r, O, Do M co a a as d d N N m m L L O O LL LL r• N tv'1 O) rn r-I J-1 D1 O -4 O .-I ro 4J c a� C O $4 C W $4 a) ro 3 4.) N O! 3 to U $4 :3 O ril impacted. Although "waters of the U.S. ", the channel has no vegetation and is not considered biologically significant. Approximately 1.3 acres (45 %) of scrub oak chaparral will be impacted. This is not significant due to the small amount of habitat lost. Direct impacts will occur to approximately 1.8 acres (43 %) of non - native grasslands, 32.3 acres (76 %) of ruderal vegetation, and 378.8 acres (77 %) of cultivated fields. The individual impacts are not significant because these communities are not sensitive. However, the cumulative loss of associated foraging habitat for raptors on a regional basis is considered significant. About 9.4 acres planted with eucalyptus will be impacted. Although currently being used for nesting by red - shouldered hawks, and probably used by the red - tailed hawk, impacts are not considered significant. Approximately 18.2 acres (37 %) of Diegan coastal sage scrub will be directly impacted. The loss is mostly because of the golf course and single family development in the northwestern Quail Hollow East and North Mesa planning areas. This is significant because sage scrub is the preferred habitat of the threatened coastal California gnatcatcher. of the total, 7.5 acres are California sagebrush dominated sage scrub. About 0.1 acre of this scrub is disturbed. Another 8.0 acres are lemonade -berry dominated_sage scrub, 1.4 acres are laurel sumac dominated sage scrub, and 1.3 acres are black sage dominated sage scrub. About 34.2 acres (29 %) of southern maritime chaparral, 4.3 acres of which is disturbed will be impacted. The loss is primarily in the northeastern portion of the Quail Hollow East and North Mesa planning areas, and the extensions of Via Cantebria and Leucadia Boulevard through the bluff. Given the high quality of this community on the site, the abundance of sensitive plant species which occur there, this is a significant loss. Direct impacts will occur to approximately 0.2 acre (3 %) of southern willow riparian woodland. This is significant because the community is a riparian wetland and endangered least Bell's vireos have been observed directly offsite to the north in similar habitat. About one acre (50 %) of southern riparian scrub will be impacted. Because this is a riparian community the loss is significant. Approximately 0.4 acre (19 %) of coastal and valley freshwater marsh will be impacted along with about 0.6 acre (55 %) of disturbed wetland. About 0.8 acre (100 %) of southern willow scrub, and 1.5 acres (100 %) of mulefat scrub will be impacted. Impacts to wetlands are considered significant. The total direct impacts to wetlands are 3.5 acres with an additional 1.0 acre of impacts to non - wetland riparian habitat, and 1.3 acres of channelized stream. Indirect Impacts Indirect impacts to vegetation with Land Use Plans A and B are the same and are listed in the previously presented Table 4 -5. This vegetation is within buffer distances of 50 feet for sage scrub, southern maritime chaparral, scrub oak chaparral, and southern riparian scrub, and 100 feet for southern willow riparian woodland and wetlands. Approximately 4.4 acres of sage scrub, 14.1 acres of southern maritime chaparral, 0.8 acre of southern willow riparian woodland, 0.3 acre of scrub oak chaparral, 0.1 acre of disturbed wetland, and 0.4 acre of southern riparian scrub will be impacted. With the exception of scrub oak chaparral the impacts are considered significant. The most deleterious indirect impact will be habitat fragmentation and isolation resulting from the extension of Leucadia Boulevard through the east facing bluff up onto the mesa top. This will most likely cause local extirpation of species over an extended period of time (several hundred years). There is an estimated 483 acres of contiguous chaparral and sage scrub communities on the bluff along Green Valley and Batiquitos Lagoon from just south of the property boundary around to Saxony Drive at La Costa Avenue. Leucadia Boulevard will separate this block into two segments. The northern segment will contain approximately 390 acres while the southern segment will be about 93 acres in size. This fragmentation is considered significant. 4 -58 Sensitive Species Direct Impacts ___rect impacts to sensitive plant species are identical with both Land Use Plans A and B. These impacts are shown on Figure 4 -21 and itemized in Table 4 -6. Although several populations of ashy spike -moss and one population of western dichondra will be impacted, these losses are not considered significant. Approximately 214 of the 225 Torrey pines (95 %) will be impacted. This is not considered significant because these individuals were planted and are not an integral part of any natural community on the site. These trees also occur several miles north of their natural range. Table 4 -6 Impacted Sensitive Plant Species Summary Species Total Individuals Direct Impacts Indirect Impacts I Total Im cts Encinitas baccharis 49 5 (10 %) 0 5 (10 %) Del Mar manzanita 1383 137 (10 %) 122 (9%) 259 (19'/.) Del Mar sand aster 6805 1780 (26 %) 327 (57) 2107 (31 %) Torrey pine 225 214 (95 %) 0 214 (95 %) Summer holl y 799 109 (14 %) 28 (4%) 137 (17'/.) Nuttall's scrub oak 1188 253 (21 %) 138 (12 %) 391 (33 %) wart- stemmed ceanothus 1244 197 (16 %) 208 (17 %) 405 (33 %) California adolphia 578 213 (37'/.) 115 (21 %) 328 (57Y.) Source: Sweetwater Environmental Biologists (1993) Approximately eight of the 35 populations (23 %) of summer holly will be directly impacted. About 109 of the 799 individuals (14 %) will be lost. The largest population contains 40 individuals in the Via Cantebria alignment near the bluff. Twenty -six of the 61 populations (43 %) of wart - stemmed ceanothus will be directly impacted. The loss amounts to approximately 197 of the 1244 individuals (16 %) on the site. One of the two largest populations impacted includes 100 individuals in the Leucadia Boulevard alignment. The impacts will not be significant. One population of five individuals of Encinitas baccharis will be directly impacted. The loss is a result of the extension of Leucadia Boulevard through the bluff. Approximately 28 of the 56 populations (50 %) of Del Mar manzanita will be impacted. The impact is mostly a result of extending Via Cantebria and Leucadia Boulevard, and development in the northeast portion of the Quail Hollow East and North Mesa planning areas. The loss amounts to 137 of the 1383 individuals (10 %) of this species on the site with the largest populations from 10 to 20 individuals each. About 11 of the 29 populations (38 %) of Del Mar sand aster will be impacted. Approximately 1780 of the 6805 individuals (26 %) will be lost. Included are a population of 1000 and four populations of between 100 and 200 individuals eliminated by the extension of Via Cantebria skirting the bluff down into Green Valley. These impacts are all significant. About 18 of the 35 populations (51 %) of Nuttall's scrub oak will be impacted. Included are 253 of the 1188 individuals (21 %) of this species on the site. Of 4 -59 these, one population of 80 individuals will be eliminated by Via Cantebria while a portion of a population containing 120 individuals will be lost to the Leucadia Boulevard bluff cut. Eleven of the 17 populations (65 %) of California adolphia will be directly impacted. Approximately 213 of the 578 individuals (37 %) of this species will be eliminated. Around 50 percent of one of the largest populations containing 100 individuals, and all of another population of 50 individuals will be lost to the golf course. These impacts are significant. With the exception of the coastal California gnatcatcher, sensitive animal species observed on the site will not be significantly impacted. Orangethroat _.. whiptails are abundant on the property and sufficient habitat will be conserved in open space. In regard to sensitive birds, either the habitat lost is marginal for the particular species or sufficient good quality habitat will be preserved on the property. One pair of coastal California gnatcatchers will be directly impacted as a result of the loss of at least one acre of coastal sage scrub within which they were observed to breed. This habitat is located in the northeast portion of the Quail Hollow East and North Mesa planning areas. The impact is significant. The majority of the pair's territory occurs outside the impacted location but most of this habitat is southern maritime chaparral. Although seen regularly in the chaparral, it is not known whether they nest in this plant association. The relationship between coastal sage scrub and southern maritime chaparral seems acceptable for the gnatcatcher, but coastal sage scrub is preferred as breeding habitat. Indirect Impacts Indirect impacts to sensitive plan species are the same with Both Land Use Plans A and B and are listed in the previously presented Table 4 -6. The impacts are because of location in buffer areas and include 122 individuals of Del Mar manzanita, 327 individuals of Del Mar sand aster, 138 individuals of Nuttall's scrub oak, 28 individuals of summer holly, 208 individuals of wart- stemmed ceanothus, and 115 individuals of California adolphia. Impacts to summer holly and wart - stemmed ceanothus are not significant. Impacts to Del Mar manzanita, Del Mar sand aster, and Nuttall's scrub oak are not in themselves significant but the combined direct and indirect impacts to these species are considered significant. The impacts to adolphia are considered significant. The extension of Leucadia Boulevard through the bluff will have a significant deleterious effect on the site fauna. The roadway will at a minimum interrupt, and at a maximum preclude some wildlife dispersal. Reptiles, amphibians, weak - flying birds such as the gnatcatcher, and small mammals may not disperse between the two remaining segments of bluff because they are unable to successfully cross a four lane road. At best a few individuals might cross from time to time. Larger mammals such as coyotes and foxes, and strong flying birds will be the least affected because they are better equipped to cross the roadway. The wildlife bridge will offset the impact to some extent, particularly for the coyotes which are important high level predators in isolated patches of scrublands. Localized division of the riparian habitat in Green Valley from the bluff is considered a significant impact from the zoological perspective. At present these habitats are effectively connected by agricultural fields. Riparian areas provide water, cover, and movement corridors for wildlife. Some connectivity will still be maintained between the corridor and bluff along La Costa Avenue near Batiquitos Lagoon. However, there will be no direct connection on the site. In addition, a thin strand of southern maritime chaparral connecting the east and west slopes of the mesa top will be removed by the golf course. This strand is the only remnant of connectivity across the mesa. Artificial lighting and various edge effects near interfaces with development are of significant concern. Artificially lighted areas are usually avoided by nocturnal animals. Exotic species such as cats and rats can invade natural 4 -61 habitats, competing with native species for food, spreading diseases, and threatening native birds and their nests. Human intrusion increases and often results in trampling of plants and removal of wildflowers. 4.5.3 MITIGATION MEASURES An impacted sensitive vegetation and sensitive species replacement and /or acquisition plan should be prepared prior to development. In consideration of the long -term phasing of development the plan should consist of two parts. The first part should include an overall concept and strategy for the entire site. This part should be completed prior to any onsite disturbance of identified impacted resources. The second part should include particular requirements for individual sectors of the site such as Green Valley. Details such as locations of exact restoration and /or acquisition sites, restoration plant palettes, propagation and planting methods, and maintenance should also be included in this part of the plan. The second part should be completed on a sector by sector basis, pric:- to onsite disturbance of identified impacted resources in each respective sector. The Can should satisfy the mitigation requirements presented in the following discuss_on. Vegetation Mitigation for direct and indirect impacts to vegetation communities is itemized in Table 4 -7. For Diegan sage scrub the recommended replacement ratio is two acres replaced for every one acre (2:1) of good quality scrub directly impacted. If restoration is successfully completed prior to the loss this ratio would be reduced to 1:1. The recommended ratio for disturbed sage scrub is 1:1. The recommended replacement ratio for indirect irr._.acts varies. A ratio of 0.5:1 is applied when the adjacent land uses are either agricultural or the golf course. A ratio of 1:1 is recommended where adjacent uses are intense such as residential, commercial, mixed uses, and roads. With re::_:.acement -here would be no net loss. Table 4 -7 Impacted Vegetation Mitigation Requirements Vegetation Type Direct Imp Replacement �s Ind.rect Impact rlitigation Replacement Ratios Acreage 1:1 0.5:1 2:1 1:1 Di an coastal sage scrub 18.1 ? 0.6 40.4 Southern maritime chaparral 29.9 4.3 103 3.8 76.3 Southern willow riparian woodland 0.2 0.0 0.8 0.0 1.2 Southern willow scrub 0.0 0.8 0.0 0.0 0.8 Mulefat scrub 0.0 1.5 0.0 0.0 1.5 Coastal and vali<, freshwater marsh 0.0 0.4 0.0 0.0 0.4 Disturbed wetland 0.0 0.6 0.1 0.0 0.7 Total wetlands 0.2 3.3 1 0.9 0.0 4.6 Southern riparian scrub 0.0 1.0 1 0.0 0.4 1.2 Source: Sweetwater Environmental Biologists (1993) 4 -62 At a ratio of 2:1 the replacement for 36.2 acres. For the disturbed scrub development the replacement should be by agricultural and golf course uses total mitigation requirement is 40.4 good quality Diegan sage scrub should be and scrub indirectly impacted by intense 3.9 acres. For scrub indirectly impacted the replacement should be 0.3 acres. The acres. There are approximately 14 to 16 acres of disturbed locations within open space areas on east facing slopes of the bluff and its edge along the mesa top where replacement could be done. Although within southern maritime chaparral, these locations are best suited for sage scrub restoration because chaparral restoration success is unproven. In addition, if sage scrub is seral to southern maritime chaparral, restoration with scrub would be a viable option in the long- term preservation of the chaparral. Indirect impacts could be reduced to some extent by revegetation of graded banks adjacent to natural areas with appropriate native plant materials as a buffer. The balance of the requirement will have to be accounted for somewhere offsite, either by acquisition of existing sage scrub or restoration of disturbed areas to scrub and placement in permanent open space. Replacement on the site and acquisition or replacement offsite will reduce impacts to a level of insignificance. For good quality southern maritime chaparral the recommended direct impact replacement ratio is 2:1. The recommended ratio for disturbed chaparral is 1:1. The recommended replacement ratio for indirect impacts varies. A ratio of 0.5:1 is applied when the adjacent land uses are either agricultural or the golf course. A ratio of 1:1 is recommended where adjacent uses are intense such as residential, commercial, mixed uses, and roads. The mitigation requirement for good quality southern maritime chaparral should be 57.8 acres. For disturbed chaparral and chaparral indirectly impacted by intense development the requirement should be 14.6 acres. For chaparral indirectly impacted by agriculture and the golf course the requirement should be 1.9 acres. The total mitigation requirement is 76.3 acres. Although there are several locations that have potential for restoration with southern maritime chaparral, the lack of empirical data on restoration of this community suggests a tow probability of success. Acquisition of southern maritime chaparral offsite and placement in permanent open space would partially reduce impacts. However, there is very little southern maritime chaparral available and it may not be comparable in quality to that on the site. Further, there would be a net loss of this plant community. Consequently, the impact to southern maritime chaparral will remain significant and unmitigable. An option to replacement and offsite acquisition of Diegan sage scrub and offsite acquisition of southern maritime chaparral would be redesign to avoid impacts. An alternative would be one that withdraws development from vegetation in the finger canyons of the Quail Hollow East and North Mesa planning areas. The alignment of Quail Gardens Drive near Magdalena Ecke park could also be moved easterly. In addition, development would be pulled back from the bluff edge in the northeast corner of the mesa top. This redesign is discussed in the section to follow entitled Alternatives to the Proposed Action. For direct impacts to good quality southern willow riparian woodland the recommended replacement ratio is 2:1 and the mitigation requirement should be 0.4 acre. At a recommended ratio of 1:1 for indirect impacts the requirement should be 0.8 acre. The total replacement requirement is 1.2 acres. For direct and indirect impacts at a recommended replacement ratio of 1:1 the requirement for southern willow scrub, mulefat scrub, coastal and valley freshwater marsh, and disturbed wetlands should be 3.4 acres. The replacement requirement for southern riparian scrub at ratios of 1:1 for direct impacts and 0.5:1 for indirect impacts should be 1.2 acres. The total wetland mitigation requirement is 4.6 acres while the total riparian, non - wetland requirement is 1.2 acres. With replacement there would be no net loss. 4 -63 The environmental channel for the Encinitas creek tributary is a probable location for the required wetland and riparian replacement. Similar soils support riparian vegetation offsite to the north. With grading to create a channel fringe and floodplain with a water table near or at the surface would support riparian and wetland vegetation. The higher elevations of the channel and floodplain would support southern riparian scrub. Replacement in permanent open space will reduce impacts to a level of insignificance. Significant indirect impacts of fragmentation and isolation of vegetation by the Leucadia Boulevard extension through the bluff can only be mitigated by elimination of the roadway. An alternative alignment would also sever the bluff vegetation into segments. Several alignment locations are examined in the following section entitled Alternatives to the Proposed Action. With any roadway through the bluff the impacts will be significant and unmitigable. Sensitive Species Encinitas baccharis should be replaced by propagation of individuals of the impacted population and introduction into disturbed locations of southern maritime chaparral designated for open space. Seeds and cuttings from the parental population should be collected and propagated every year after project approval up to the time when the population is impacted. Topsoil should also be salvaged just prior to development to include as much of the seed pool as possible. The replacement ratio should exceed 1:1 or at least 5 individuals. This replacement will result in no net loss and reduce impacts to a level of insignificance. Del Mar sand aster should be replaced by propagation through collection of seed and soil (seed bank) from populations to be impacted and introduction into disturbed locations where sage scrub is replaced. This plant appears to be a fugitive and early seral species which can be successfully propagated. The replacement ratio should exceed 1:1 or at least 2107 individuals. Replacement would result in no net loss. An option would be to acquire and place in permanent open space offsite, southern maritime chaparral which contains substantial populations of this species. These actions will reduce impacts to a level of insignificance. California adolphia could also be successfully propagated in a sage scrub restoration effort but is dependent on clay soils. Appropriate clay soils on the site are located in the northwestern portion where development will occur. The replacement ratio should exceed 1:1 or at least 328 individuals. Restoration of coastal sage scrub offsite on clay soils using adolphia as a co- dominant should be conducted and the vegetation placed in permanent open space. An option would be to acquire and place in permanent open space offsite southern maritime chaparral which contains substantial populations of this species. This will reduce impacts to a level of insignificance. Del Mar manzanita and Nuttall's scrub oak are species restricted to certain soils or are otherwise difficult to propagate or transplant. For impacts to these plants southern maritime chaparral which supports substantial populations of the species should be acquired offsite and placed in permanent open space. This will reduce impacts to a level of insignificance. Although impacts to summer holly and wart - stemmed ceanothus are not significant it is recommended that representative of these species also be included in the vegetation of any offsite aquisition site. An option to replacement and offsite acquisition of southern maritime chaparral containing the above sensitive plants would be redesign to avoid impacts. The alternative introduced above would also reduce impacts to sensitive species. This redesign is discussed in the section to follow entitled Alternatives to the Proposed Action. Impacts of lost habitat for the coastal California gnatcatcher should be mitigated by replacing sage scrub vegetation on the site. The restoration site 4 -64 should be contiguous with other habitat occupied by gnatcatchers and large enough to support a pair. This measure will correspond well with mitigation requirements for coastal sage scrub replacement on the site and reduce impacts to a level of insignificance. Acquisition of off site habitat which supports at least one pair of gnatcatchers and placement in permanent open space represents another mitigation approach. Redesign to withdraw from the affected habitat above to reducetornavoid replacement impacts to egetat on and sensitive species would serve this purpose. Habitat Connectivity and Other Considerations A wildlife bridge over the Leucadia Boulevard extension through the bluff is included in the Specific Plan. This bridge is intended to aid in wildlife dispersal. The bridge will be at least 20 feet in width, covered with soil, and planted with native vegetation. This bridge should be located where natural wildlife movement occurs. From a population viability standpoint the dispersal which will occur across the bridge may help. The bridge may be suitable for coyotes, smaller mammals, and reptiles, and become a crossing point for overhead dispersing and foraging birds. However, the small mammals, reptiles, and amphibians may only use the bridge if they happened upon it or routinely frequented habitats next to it. Consequently, the bridge will probably not facilitate substantial wildlife movement. Since no research has been completed that allows prediction of success for a wildlife bridge it must be concluded that impacts will remain significant and unmitigable. Significant impacts to wildlife dispersal through the bluff habitat can only be adequately mitigated by elimination of the Leucadia Boulevard extension. An alternative alignment would also sever the bluff habitat into segments. Several alignment locations are examined in the following section entitled Alternatives -- to the Proposed Action. A wildlife corridor should be created between the bluff and the Encinitas Creek riparian system in Green Valley. The corridor should be at least 50 feet wide and located along the north property line so that an adjacent offsite strip could be added to make its width 100 feet. The corridor should be planted with native species appropriate for both wildlife cover and movement. Access under the extension of Via Cantebria to the bluff adequate for large mammal movement should be provided such as a box culvert. This corridor will establish connectivity for some wildlife dispersal between the bluff and riparian habitats. Elimination of the link across the mesa top can only be mitigated by redesign. The alternative mentioned above would serve this purpose. The Specific Plan General Planning Standards require blended transitional landscape buffering between development and Magdalena Ecke park and other natural open space areas in the Quail Hollow East and North Mesa planning areas. A minimum 25 foot wide rear yard is required to be separated from a 30 foot wide fuel modification zone by a minimum 42 inch high wall or fence. This buffer will limit human and domestic pet encroachment into natural areas. The Mixed Use Zones, Sec.s 6.7.2 and 6.8.2, Development Standards require outdoor lighting to be shielded in a manner to direct it away from adjoining properties. The Commercial Zone, Sec. 6.9.2, Development Standards also require the same shielding for outdoor lighting. These measures will minimize the negative effects of night lighting. 4 -65 4.6 CULTURAL RESOURCES AND PALEONTOLOGY A cultural resource and paleontological investigation of the Encinitas Ranch Specific Plan area has been conducted by Scientific Resource Surveys (1992). The investigation addresses archaeology, history, and paleontology. The investigation includes a literature review, records searches, a cultural resources inventory, in -field inspection, and a report of findings, evaluations, and mitigation. An additional subsurface testing and historical assessment was subsequently preformed by SRS (1993) to determine the significance of the archaeological and historical resources on the site. A copy of the reports, labeled Appendix E, is included with other technical appendices to this document. Report content is summarized in the following discussion. 4.6.1 EXISTING CONDITIONS Archaeological Resources Six prehistoric sites were previously recorded on the property in the 1920's. An attempt to relocate these sites was made in 1986. None of the sites remained intact, having been disturbed by grading and farming activities. However, additional evidence of ancient occupation was documented at that time. This evidence of archaeological resources has been reassessed and uncultivated portions of the study area inspected. No new surface evidence of other archaeological resources was discovered. Locations of the archaeological resources are recorded on maps filed with the City of Encinitas. A brief description of the resources follows. Ecke 1 (map symbol - Ecke 1) This prehistoric site was previously described as a midden redeposit. Midden soil containing shell was found spread over fill in a small canyon. It was believed that the midden did not originate on the property because the site was typical of those located adjacent to the coast. The site was recorded but noted to contain very limited potential to yield significant information. Reassessment of this site indicates that it is probably a bona fide archaeological site rather than a redeposit. There is no evidence or accounts of the midden being transported from some offsite location. Shellfish species associated with archaeological activities found at the site include chione ( Chione sp.), scallop (Pecten sp.), and Moon Shells (Polynices sp.). Ecke 2A & 2B (map symbol - Ecke 2A & 2B) These archaeological resources were previously described as two small shell scatters recorded as parts Of one prehistoric site. No artifacts were observed and it was noted that the resources contained limited potential for significance. Reassessment of these resources confirmed the previous findings. Shells identified at this location included oyster (Ostrea sp.), chione, and scallop. Historical Resources Three historic sites were identified on the property during the 1986 investigation. These sites have been reassessed and additional historic resources have been found during historical reconnaissance of the area. Locations of historic resources are shown on maps filed with the City Of Encinitas. A brief description of the resources follows. Ecke 3 (map symbol - Ecke 3, Olive Tree Site) This site was previously described as having been plowed with scattered remains including remnants of a concrete slab, clay pot fragments, clay tile fragments, and a piece of white glazed stoneware. Olive trees shading the site were dated to the early 1900'x. No evidence of subsurface remains was found. Reassessment of this site revealed artifacts including concrete debris and various housewares. 4 -66 Local inquires suggest Wa a I this site was occupied by a structure moved onto the property around World Ecke 4 (map symbol - Ecke 4) This site Was previously e e stands eof rcact cactus, cultivated ornamentals, t and pads, a palm tree• consisting of two orchard, t large r observe. ct s or subsurface No surf ce ar a afractured concrete slab and an old pieceR of farm machinery• site revealed Local inquires suggest that this site was occupied by a structure moved onto the property around World War II. Ecke 5 (map symbol - Ecke 5) This site was previously described as currenaren,ly datingnto the early v1900rsm a distance. The buildings were noted as app Y Reassessment of this site revealed that the structure no longer exists. There are twores moved onto the property around aWorld War I?te was also occupied by structu Ecke 6 /Concrete Pads (map symbol - Concrete Pad) Two concrete pads with no associated artifacts occur in Green Valley. Ecke 7 /Carter Ranch (map symbol - Carter Property) This site supports a dilapidated barn dating to the 1890'x. Ecke 8 /Vogel Ranch (map symbol - Vogel Ranch) Buildings dating to the 1890's as shown on the USGS 1898 Quadrangle occur on this site. A timber farmhouse is reported to have been built at this location in the 1880's by the Vogel family. This building was used in 1920 and later to house farm workers. Two farm buildings remain, one of which is a butted plank structure with a gabled roof. The other structure is a board and batten flat - building. Bwere probably rebuilt pre-modern technology t to some ext nt withingtheelastd nails hese structures u 50 nails Ecke 9 /The Museum (map symbol - The Museum) Numerous pieces of old farm machinery have been observed on the property most of which are on display at two nearby locations. The collection dates to the 1930's and includes mule - powered Fresno scrapers, rakes, wagons, carts, a windmill, water tower, and a truck. Groh House (map symbol - Groh House) This house, located along the Leucadia Boulevard improvement section, was built in the early 1930's by Al Groh, a retired circus aerialist. Hollywood movie prop crews were brought to the location to assemble the most convincing replica of an early California ranch as possible. The totality was supposed to look like a Mexican stage set. Bricks and roof the were treated toed th lsl ding Garae doors were fitted with ironwork and other doors equipped latches depicting the early Mexican period. The tile, wood overhang, exposed rafters and ceiling beams, and exposed eucalyptus log pillars were intended for a similar effect. This building represents a conscious attempt, allied with Hollywood, to create an early Spanish hacienda. Paleontological Resources The study area contains three lithostratigraphic units of the La Jolla Group including the Middle Eocene Del Mar Formation, Torrey Sandstone, and Scripps Formations. The Sweitzer Formation (Lindavista Formation) consisting of marine 4 -67 and non - marine nearshore terrace deposits caps the succession. Except for the Del Mar Formation these geologic units are shown on the previously presented Figure 4 -1. A brief description of the paleontological resource potential of the formations follows. Sweitzer Formation (map symbol - Qt) This formation is mapped as Terrace deposits and generally described as unfossiliferous and its paleontological resource potential is low due to its possible non - marine origin. Any fossils that do occur could be very significant. Observations of the Sweitzer Formation in the study area revealed a red -iron- stained, cliff forming outcrop throughout the eastern sector. No evidence of fossils was discovered. Eocene Torrey and Scripps Formations (map symbol - Tt) Torrey Sandstone has no fossil localities in the vicinity of the study area. The formation is a barrier beach deposit in which molluscan fossils are rare. A rich fossil locality was previously found in Torrey Sandstone seven miles to the south. The Scripps Formation is fossiliferous and has an abundant molluscan assemblage. One locality (V- 71219) -is known in this formation to the northwest of the study area. Specimens of mollusks, coprolites, ray, galeoid shark, and trionychid turtle were found at this site. Observations of road cuts in Torrey Sandstone in the study area revealed no evidence of fossils. The Scripps Formation/ Torrey Sandstone and Sweitzer Formation contact was inaccessible. Eocene Del Mar Formation The Del Mar Formation crops out in the northeastern sector of the study area immediately east of E1 Camino Real. The formation is a marine lagoonal deposit that displays a distinct molluscan assemblage and resistant sandstone interbeds of Ostrea idriaensis. Attempts to locate previously mapped outcrops of the Del Mar Formation near the intersection of E1 Camino Real and Olivenhain Road were unsuccessful. These outcrops were mapped in stream channels and dense vegetation and standing water made relocation impossible. 4.6.2 ENVIRONMENTAL EFFECTS Archaeology impacts are significant if a prehistoric resource is disturbed or destroyed that is associated with an event or person of historical or scientific importance, can provide information of public interest and useful in addressing research questions, has special or particular quality, is at least 100 years old and possesses substantial stratigraphic integrity, or involves important research questions answerable only with archeological methods. History impacts are significant if a historic resource is disturbed or destroyed that is ordinarily 50 years old, possesses integrity of location and other factors, is associated with events or persons significant to history, or embodies distinctive characteristics. Paleontology impacts are significant if important fossils are disturbed or destroyed. All known archaeological and historical resources must be evaluated for significance prior to any disturbance. If the resources are found not to be significant, no mitigation is necessary. If found significant the resources must be preserved or mitigated through a research program. Known cultural resource sites on the property are very limited in number. With significance testing and appropriate mitigation as necessary, no adverse impacts to cultural resources will occur. The study area retains great potential for producing important information concerning the early years of Encinitas. Geologic formations on the property have sensitivity for paleontological resources. Significance testing of archaeological and historical resources and paleontological sensitivity are described in the following subsections. 4 -68 Archaeological Resources According to CEQA, Appendix K an "important" (significant) archaeological or historical resource is one which meets the following criteria. First, the resource is associated with an event or person of recognized significance in California or American history, or recognized scientific importance in prehistory. Second, the resource can provide information which is both of demonstrable public interest and useful in addressing scientifically consequential and reasonable archaeological research questions. Third, the resource has a special or particular quality such as oldest, best example, largest, or last surviving example of its kind. Fourth, the resource is at least 100 years old and possesses substantial stratigraphic integrity. Finally, the resource involves important research questions that historical research has shown can be answered only with archaeological methods. If an archaeological resource is not important, no mitigation measures are necessary. If a resource is determined to be important, and avoidance is infeasible, an excavation plan for mitigating impacts must be prepared and implemented. Archaeological sites Ecke 1 and Ecke 2A & 2B have been verified as archaeological deposits. However, a questions arose as to whether Ecke 1 was re- deposited or in -place materials. Further, Ecke 2A & 2B have been variously described. Consequently, significance testing of the sites has been conducted. Testing included surface artifact collection, backhoe trenches, and hand excavated meter square units. All removed soil was screened and artifacts and ecofacts labelled and catalogued. Six possible non - diagnostic flakes and a total of 176 modern artifacts were recovered from the two sites. A total 322 shellfish fragments from Ecke 1 and 16 shellfish fragments from Ecke 2 were recovered. The four most abundant species were Chione, Ostrea, Pecten, and Nassarius. All are readily available in nearby wetlands. The occurrence of shellfish suggests that these are prehistoric midden sites. However, the mixture of modern items within the shallow shell deposits indicates that they are at the least, highly disturbed. The disturbance has compromised the ability of the sites to provide information concerning the prehistoric occupation of the area. Neither site is considered significant and no mitigation is necessary. Historical Resources The State of California Department of Parks and Recreation recommends that historical resources be evaluated according to criteria for inclusion of historic resources on the National Register of Historic Places. The site must, in most instances, be 50 years old. Further, the quality of significance in American history, architecture, archaeology, and culture must be present in districts, sites, buildings, structures, and objects of state and local importance that possess integrity of location, design, setting, materials, workmanship, feeling, association, and one of the following. First, there is an association with events that have made a significant contribution to the broad patterns of our history. Or second, there is an association with the lives of persons significant in our past. Or third, there is an embodiment of the distinctive characteristics of a type, period, or method of construction, or a representation of the work of a master, or possession of high artistic values, or representation of a significant and distinguishable entity whose components may lack individual distinction. Or finally, there has been yielded, or likely to be yielded, information important to history or prehistory. Historic sites Ecke 3, Ecke 4, Ecke 5, and Ecke 6 are all post -World War II structural remains which consist of concrete foundations and associated artifacts. These sites are not 50 years old, no structures exist, they do not retain integrity of design, setting, materials, workmanship, feeling and 4 -69 association. They would not be eligible for the National Register and are not considered significant. The Groh Housee, Carter Ranch, Vogel Ranch, Museum (Ecke farm equipment), and additional structure known as the Hammond Ranch House ,m�a_�! gualifv for listing on the National Register. The Groh House will not e directly disturbed and significance testing is not necessary. However, encroachment of Leucadia Boulevard improvements into the lot warrants special attention. Because the other structures could be disturbed or destroyed by development, significance testing of the resources has been conducted. Groh House Improvements to Leucadia Boulevard will encroach into a portion of the Groh House front yard without directly affecting the structure. However, if a noise attenuation barrier such as a wall is necessary in this location its design and materials could degrade the architectural character of the house. Carter Ranch The Carter Ranch buildings most likely were constructed in the 18901x. Today a two -story gambrel roofed, wooden house and barn /garage remains. The original house was destroyed by fire many years ago. The present house appears to be a converted barn. The original house is shown on the 1898 USGS 15' quad map and may have been built by John and Christina Lux or August and Emma Metzac. Both families are listed as residing in Green Valley during the 1900 census. The structures have undergone extensive renovation within the last 50 years and no longer qualify for nomination to the National Register of Historic Places. Vogel Ranch Vogel Ranch consists of a one story wooden house with associated barn, stable, and corral. The house was extensively remodeled in the 1950's with original wood elements replaced by modern pieces and the structure enlarged. The two -story vernacular style barn is constructed of wooden plank siding with all nails round. There has been board replacement on all sides. The former wood shingle roof has been replaced with a tar shingle covering. The barn rests on a concrete foundation with a concrete slab floor. The one story stable is constructed in the batten board style with a wood shingle roof. No square nails were observed and the exterior exhibits extensive board replacement. There is conflicting information as to who built the Vogel Ranch. A structure is denoted on the 1898 USGS 15' quad map in the same location as the ranch and a land transaction of 1880 lists Lemuel Kincaid as the Grantee. According to the 1900 census Mr. Kincaid was a resident of Encinitas in the area described as between Encinitas and Green Valley. The Walter Vogel family did not move to Encinitas until after 1920 and were tenants of Paul Ecke. Mrs. Vogel and Paul Ecke's wife Magdalena were sisters. The current resident, Walter Beljean, is the husband of the Vogel's daughter. Because of extensive renovation within the last 50 years the structures no longer qualify for nomination to the National Register of Historic Places. Hammond Ranch House No longer standing, the Edward Hammond house once existed on the property. It is shown on the USGS 15' quad map and was constructed by Mr. Hammond and his sons. They named their parcel Sunset Ranch and members of the family were residing there as late as 1920. Remains of the house may possibly be incorporated into the present headquarters of the Paul Ecke Poinsettia ranch. Extensive renovation within the last 50 years disqualifies the structure from nomination to the National Register of Historic Places. The Museum The historic farm equipment at the "Museum" on the property include an articulated farm wagon, breaking plow, horse drawn single gang bottom plow, horse 4 -70 drawn drag scrapper, horse drawn self - loading wheel scraper, "Fresno" road grader, horse drawn sulky hayrake, horse drawn broadcast spreader /feeder, 1915 White fire truck, and aeromotor farm windmill. Additional equipment elsewhere includes a mechanical transplanter, a Towner cultivator /subsoiler, and various horse drawn wagons, rakes, and diskers. Collectively this assemblage has potential for understanding historic agricultural practices but is not significant as a historical structure or site. Paleontological Resources Criteria used to determine paleontological sensitivity of a formation are rock type, known paleontological resources, potential paleontological resources, type of fossils found, and amount of information known about the geologic unit. Sensitivity is very low for igneous and metamorphic rock complexes. However, it should be noted that any fossils found in such rocks would be very significant due to their rarity. The sensitivity of sedimentary rock types is at least low. If a sedimentary formation is marine or pluvial in origin the likelihood of fossils is increased and the sensitivity moderate. If a formation is known to contain important fossils its sensitivity is high. Where important fossils are abundant the sensitivity of the formation is considered very high. The Torrey Sandstone, Scripps, and Del Mar Formations are marine in origin and have a moderate sensitivity for potential subsurface paleontological resources. The Lindavista Formation is predominantly unfossiliferous and the occurrence of any fossils would be very significant. Sensitivity of this formation is considered moderate. Site grading could uncover, disturb, or destroy any subsurface paleontological resources that may occur. 4.6.3 MITIGATION MEASURES Historical Resources If a noise attenuation barrier barrier is necessary for the Groh House because of improvements, p to Leucadia Boulevard it should be of materials complementary tot the architectural character of the building. Historic agricultural equipment should be relocated as necessary and if not retained by the present owner donated /sold to a historical society or other interested party for preservation and display. Paleontological Resources Grading activities that cut into natural Torrey Sandstone, Scripps, Del Mar, and Lindavista Formations should be monitored. The monitoring program should be conducted by a qualified paleontologist and include the following activities. Review of final grading plans and attendance at all pregrade meetings to consult with grading and excavation contractors. Monitoring of all grading activities in native materials and recovery of discovered fossil resources; the monitor empowered to redirect earth - moving equipment in order to recover exposed fossils; and unless significant fossils are recovered, monitoring may be restricted to four hours per day. Preparation of recovered specimens to a point of identification including washing of sediments to recover small vertebrates; identification and curation of specimens into an established museum repository with retrievable storage; and preparation of a report of findings with an appended itemized inventory of specimens and submittal to the City of Encinitas. If important fossils are encountered during other development activities, further measures would be necessary to ensure their proper removal and preservation. 4 -71 Such measures should include diversion of construction activities to other locations until fossils are removed, and curation as described above. 4.7 LAND USE COMPATIBILITY 4.7.1 EXISTING CONDITIONS Current Land Uses and Community Character Project Area The Magdalena Ecke Family YMCA and Paul Ecke Sports Park properties are developed for parking and outdoor open field sports activities. The Leaf property is developed as a residence and sculpture studio. An above ground water tank is situated on the Olivenhain Municipal Water District (OMWD) parcel. The Specific Plan area and Thornton property are devoted to agricultural and natural open space use. Distribution of these uses can be seen on Figure 4 -22. Agricultural use is separated into greenhouses for potted plants, cut flowers, and nursery stock production and open fields for cut flower and nursery stock production. The greenhouses are located on the upper mesa in the southwestern sector, at the midwestern boundary near Magdalena Park, and on the Thornton property in the southern sector. There are several support buildings such as warehouses and offices associated with the greenhouses. The open fields are situated on the upper mesa in the extreme western sector, over the large expanse not devoted to greenhouses, in Quail Gardens canyon, and on the floor of Green Valley. There are a few single family residences on the upper mesa and on the Carter property in Green Valley and old farm buildings in Quail Gardens canyon. Two surface reservoirs for runoff storage and irrigation purposes are located on the central upper mesa. Natural open space occurs in finger canyons in the northwest including Magdalena Park, and on the bluff along Green Valley. Access is by driveways along Saxony Road and Sidonia Street, and unimproved farm roads connected to Leucadia Boulevard, Quail Gardens Drive, Via Cantebria, and E1 Camino Real. Along Leucadia Boulevard between the plan area and I -5 where road improvements will be made, land uses are primarily single family residential. The relatively new Fox Point and older Passidonia Knolls neighborhoods lie north and south of the boulevard immediately west of the Specific Plan boundary. Further west are the older Hillside Acres and Avocado Acres on the north and south sides of the roadway. There is a greenhouse grouping and vacant parcels in Hillside Acres on the north side, and a distinctive circa 1930's spanish mediterranean style home at the I -5 interchange. The Avocado Acres neighborhood is on the south side with the Holiday Inn motel situated at the southeast corner of the interchange. A commonly recognized reference point in defining the community character of an area is its "sense of place ", or uniqueness from an overall qualitative standpoint. This is derived from the area's natural and formal boundaries, natural and man -made physical characteristics, and commonly shared human attitudes. Because of the extensive open fields, and natural finger canyons and bluff, most of the Specific Plan area has a strong rural character. The areas developed for greenhouses, though also to a degree rural in nature, have a somewhat industrial feeling due primarily to their structural form and proximity to residential development. Along Leucadia Boulevard the Fox Point neighborhood is individually suburban in character while the Passidonia Knolls neighborhood is older with some vacant parcels and semi -rural in feeling. 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C N GO m N L O N D r J N J = U (1) 3 ; c _ � , ^ c U N cv C V cC N 16 p 3 CC ca LL Cn a '0 N J d 4; C c6 T T v 0 C m M Q c0 N 0 OJ (O 01 •— m O O m •— C U m LL d U J Q J 7 U V C, m C � J � � - • - W - 1 • - o • Z N m I d' O� CO 0) '-i N a ro O N -A ctl +1 U rl 4J � W U W 41 U 34 O WU 4J .n r —4 p N U $4 a d, 14 U O w N m I d' t, _N U LL C 0 cu a) 1 U �� lL CO a ) c °' Q) _ E T U ♦ a co 0.2 CL �10 cC � T d o CL N �' ca V% Q) O y U � L � � (n t O 0 — 3 U E ca Um� LL > v °- cn Q E a� Cli • , ■ a _c N O — Z a T c T E- U c c c ++ C c o oa�i 2) j v .c -' T- t ¢ > U m 000 Q d 4J •ri ul 4J U W �o 14 r. O a`di � U r�I as m v m -4 4J 4-J —1 -.1 Cr' � W W 00 N (D 0) -.4 W i rn OD rn m m U W w O U U N O co I v -1 surroundings Leucadia In the community of Leucadia to the north and west, adjacent land uses are predominately single family residential. Immediately to the north lies the House of Mazda religious retreat, surrounded by open fields. Beyond is the Quail Gardens neighborhood, a greenhouse grouping, and vacant land. A large parcel of natural open space in Indian Head canyon lies adjacent to the northwest. The Fox Point and Passidonia Knolls neighborhoods are adjacent at a midwest location. A greenhouse grouping and some disturbed open space land lies adjacent to the south. Principal access is by Leucadia Boulevard and La Costa Avenue to Saxony Road, Sidonia Street and Quail Hollow Drive. The Quail Gardens neighborhood and Fox Point neighborhoods are individually suburban in character while the Passidonia Knolls neighborhood is older with some vacant parcels and semi -rural in feeling. Overall, the agricultural and open space uses, and older neighborhood together with the nearby rural Specific Plan area give these surroundings a semi -rural character. According to the Encinitas General Plan (City of Encinitas, 1989) 1059.4 acres (49 %) of the 2145.1 acre Leucadia community are devoted to residential uses. Of the residential acreage, 879 (83 %) is single family. There are 280.9 acres (13 %) and 559.9 acres (26 %) respectively (39 %) in agricultural use or undeveloped. Fifty and six- tenths acres (2%) are devoted to commercial uses while 2.6 acres are used for industrial purposes. Open space accounts for 32.5 acres (2 %) of the area. The residential neighborhoods are found primarily on mesas in the western part of the community. Agricultural greenhouses and nurseries are scattered throughout Leucadia with the major floricultural operations, including greenhouses and floricultural fields, on the eastern mesa and in Green Valley (specific plan area). The undeveloped land is mostly on the bluffs of Green Valley and Batiquitos Lagoon and in Indian Head Canyon. Commercial uses are concentrated along Highway 101 near the beach. Primary access for the Leucadia community is Highway 101, Vulcan Avenue, I -5, Saxony Road, La Costa Avenue, and Leucadia Boulevard. The wooded older residential areas of Leucadia together with intermingled agricultural uses, undeveloped parcels, and natural land gives the overall community a semi -rural character. Old Encinitas In Old Encinitas to the southwest and south surrounding uses vary. To the southwest the extreme western sector is bounded on the north by a few single family residences on large lots, a small greenhouse grouping, vacant parcels, and open fields. Immediately to the south are YMCA buildings and apartment complex. To the south across Saxony Road from the Ecke sports complex is the San Luis Rey psychiatric hospital, a vacant parcel, and Quail Botanical Gardens. The small Quail Park single family residential neighborhood lies east of the gardens in the canyon with a greenhouse grouping, and vacant parcels beyond. Next, to the east above the canyon lies the older Pacific Serena duplex neighborhood. Finally, there are single family dwellings on large lots and vacant parcels in an older neighborhood along Princehouse Lane and Seeman Drive directly south of the Thornton property. Principal access is by Encinitas Boulevard, Saxony Road, and Quail Gardens Drive. Because of its diversity of uses, the overall community character of this area of Old Encinitas is difficult to define. The scattered agricultural use, botanical gardens, and older single family neighborhood each lend a semi -rural feeling to their particular locations. However, the sports facilities, hospital, duplex neighborhood, and newer single family neighborhood are decidedly suburban in character. The General Plan notes that in Old Encinitas 736.6 acres (46 %) of the 1598.7 acre community are residential. Single family dwellings account for 520 of these 4 -74 acres (71 %). Of the total community acreage, 173.6 (11 %) are in agriculture and 146.5 (9 %) are undeveloped. Commercial uses account for 151.5 acres (9%) of the community. Industrial use occupies 13.6 acres ( <l%). There are 84.7 acres (5%) of open space. Residential neighborhoods are widespread with some greenhouses, nurseries, and undeveloped land scattered throughout. The commercial uses are concentrated along Highway 101 and Encinitas Boulevard. Principal access for the community is Highway 101, Vulcan Avenue, I -5, and Encinitas Boulevard. Although there are some agricultural uses and open land in Old Encinitas, the overall community character is not perceived to be rural. This community has a distinct older downtown commercial core with surrounding older residential neighborhoods and has a small town feeling. New Encinitas In New Encinitas to the east and southeast surrounding land uses are mostly single family residential and natural open space land with single family residential and commercial uses beyond. Immediately to the southeast lies the Park Encinitas mobile home neighborhood. Beyond are duplex and single family dwellings of the Terraces at Cantebria, and retail commercial complexes along E1 Camino Real. To the east, land across E1 Camino Real near Olivenhain Road is hilly natural open space and terraced graded pads with Garden View and Mountain Vista single family neighborhoods beyond. Principal access is by Encinitas Boulevard, El Camino Real, Via Cantebria, Via Molena, Via Montoro, Mountain Vista Drive, Garden View Road, and Olivenhain Road. Although there is some natural open space land along E1 Camino Real, the overall community character of this area of New Encinitas is suburban. As reported in the General Plan, New Encinitas is primarily a residential community with 1436.4 acres (65 %) of its 2219 acres in these uses. Single family dwellings account for 1194.7 acres (83 %) of the residential land. There are 65.6 acres (3 %) in agricultural use while 183 acres (8 %) lie undeveloped. There are 163.3 acres (7 %) of commercial land and 285.2 acres (13 %) of open space. Commercial uses are located almost entirely along E1 Camino Real and Encinitas Boulevard. Agricultural land is primarily restricted to Green Valley (specific plan area) with undeveloped land in the north and south along E1 Camino Real. Principal access is by Encinitas Boulevard, E1 Camino Real, Via Cantebria, Village Park Way, Mountain Vista Drive, and Garden View Road. Overall, community character is suburban. Carlsbad In Carlsbad to the north Green Valley land is used for open field agriculture with the bluff and riparian corridor along Encinitas Creek in natural open space. To the northeast in the La Costa Southwest community there is natural open space with Rancho de Ponderosa and Santa Fe Ridge single family neighborhoods beyond to the east. Because of the large expanse of agricultural and natural open space in Carlsbad the character there is semi - rural. The Carlsbad Green Valley community, encompassing some 281 acres, is devoted to field floriculture on the valley floor with the bluff and riparian habitat along Encinitas Creek undeveloped. According to the Zone 12 Local Facilities Management Plan (City of Carlsbad, 1990) the Carlsbad community of Southwest La Costa consists of 654 acres of which 163.2 acres (25 %) are developed as single family residential. The 490.8 acre balance lies undeveloped as natural open space land. The open land is located along E1 Camino Real and in the north in the Arroyo La Costa area. Principal access is by E1 Camino Real, Olivenhain Road, Amargosa Drive, and Levante Street. The residential neighborhoods of Southwest La Costa are suburban with the remaining open land along E1 Camino Real and the Green Valley community rural in nature. 4 -75 Future Land Uses and Community Character Encinitas General Plan and Zoning Code Project Area Most of the Specific Plan area and all of the Leaf and OMWD properties are within the Encinitas General Plan Leucadia Community. The extreme western portion of the Specific Plan area, the YMCA /Sports Park, and the Thornton property are within Old Encinitas. Green Valley is within New Encinitas. Land use policy for each of these communities is shown on Figures 4 -23, 4 -24 and 4 -25. In Leucadia and New Encinitas the Specific Plan area is designated Specific Plan (SP). In Old Encinitas the Specific Plan area is designated SP with an underlying designation of Residential (0.51 -1.00 Units /Acre) for the extreme western portion. The YMCA /Sports Park is designated Public /Semi - Public. The Leaf and OMWD properties are designated SP. The Thornton property is designated Residential [2.01 -3.00 Units /Acre). The Encinitas General Plan (City of Encinitas, 1989) Citywide Land Use Policy applies a Specific Plan Overlay to the SP designation which calls for specific plans to be prepared for these lands. In direct reference to the specific plan area the policy states that this some 900+ acres of land known as the "Ecke holdings" are outside of current (1988) incorporated City boundaries, but are within the City of Encinitas Sphere of Influence. This area includes some important visual and environmental resources, is of concern under Coastal Act policies, and includes links vital to the functioning of the City Circulation Plan. Further, the specific plan for this area is to serve as its comprehensive and detailed blueprint for development and use. As such, the specific plan shall be adopted prior to any annexa- -ion of land, or any new development and use other than agricultural uses. The specific plan for this area shall include the following: Implementation of all applicable goals, policies, and provisions of the General Plan, notably those especially established for this area under the Land Use and Circulation elements, including land use allowances /limitations and circulation requirements for the Leucadia Boulevard extension. Processes and procedures for implementation of individual uses and structures (application and review processes) shall be established. As can be seen on Figure 4 -26 and the previously presented Figure 4 -13, portions of the specific plan area are also subject to the General Plan Special Study Overlay and Scenic /Visual Corridor Overlay. The Special Study Overlay is applied to environmentally significant areas and covers the northwest finger canyons, Quail Gardens canyon, the bluff, and Green Valley. The Scenic Corridor Overlay identifies those areas of the City where significant aesthetic and visual resources need to be considered before new development proceeds to ensure that significant viewsheds are retained. Saxony Road, Leucadia Boulevard, and E1 Camino Real are designated Scenic Highways. There is a Scenic Corridor along E1 Camino Real north of Garden View. Further, as shown on Figures 4 -27, 4 -28, and 4 -29 land use in the specific plan area is affected by the General Plan Circulation Plan, Recreation Facilities Plan, and Bikeway Facilities Plan. The Circulation Plan designates Saxony Road and Quail Gardens Drive as Augmented Local Streets (2 Lanes), Via Cantebria as • Major (4 Lanes), Garden View Road as a Collector (4 lanes), E1 Camino Real as • Prime Arterial (6 Lanes), and Leucadia Boulevard as a Major (4 Lanes) with a note that this roadway between I -5 and Ei Camino Real is also designated as "Scenic Roadway" with an 85 foot right -of -way. The recreational trail system runs along the mesa top, the northwest finger canyons, Leucadia Boulevard, E1 Camino Real, and between E1 Camino Real and the mesa trail. There are bikeways along Saxony Road, Quail Gardens Drive, Via Cantebria, E1 Camino Real, and Leucadia Boulevard with a north end Saxony /Quail Hollow connection, and south end Via Cantebria /Garden View Road connection. 4 -76 The corresponding zone classification for the Specific Plan area is Specific Plan [SP]. The corresponding zone classification for the underlying designation in the western portion is Rural Residential 1 [RR -1] for Residential [0.51 -1.00 Units /Acre]. Corresponding zone classifications for the Thornton and YMCA /Sports Park properties are Residential 3 [R -3] for Residential [2.01 -3.00 Units /Acre] and Public /Semi - Public. Rural Residential 1 is intended to maintain rural character by restricting development to single family dwellings with up to one unit per acre possible. Residential 3 is also low density single family with between one and three units per acre and a minimum lot size of 14,500 square feet. Pertinent Zoning Code overlay zones corresponding to the Special Study Overlay designation are the Hillside /Inland Bluff [H /IBO], the Flood Plain [FPO], the Cultural /Natural Resource [CNRO], the Agricultural [AGO], and the Scenic /Visual Corridor [S /VCO]. A framework for future conditions of the specific plan area and Leucadia Boulevard alignment is established by both city wide and particular Encinitas General Plan goals and policies. Applicable General Plan goals and policies are presented in detail in a following subsection entitled General Plan Consistency. In direct reference to the specific plan, the Land Use Element states that the plan shall include agricultural and open space uses on the upper mesa south of the Leucadia Boulevard extension, and low density residential (2 -3 units /acre) use on the mesa north of Leucadia Boulevard. Mixed uses of light industrial, commercial, office professional, institutional, and residential may be allowed in Green Valley. Total development potential shall not generate vehicular traffic in excess of 25,000 average daily trips (ADTs). A number of other specific plan conditions ensure preservation of the agricultural and open space uses and control access. Areas reserved for agriculture shall be at least 40 acres in size with surrounding uses located, clustered, and buffered to avoid conflicts. Direct access to development in Green Valley shall be other than E1 Camino Real. ►In direct reference to Leucadia Boulevard East of I -5, the General Plan Circulation Element states that the objectives in the design and improvement of the Leucadia Boulevard link are to provide a truly scenic roadway that fits and reflects the community character. An additional objective is to mitigate all possible negative effects on surrounding neighborhoods from noise, traffic, light, and visual blight by providing substantial design and landscaping amenities. A final objective for this roadway extension is to create a visual asset to the community. Particular policies plan Leucadia Boulevard as a maximum four lane through road which may include broad landscaped medians and /or parkways integrated with pedestrian facilities. Buffers such as earth berms and vegetation may be provided, and any noise attenuation devices generously landscaped. Grading shall be minimized where the alignment cuts through the bluff to Green Valley and wildlife corridors provided. There shall be a bridge over Encinitas Creek. Based on city wide General Plan goals and policies the steep bluffs on the west side of Green Valley should be retained in natural open space. The tributary to Encinitas Creek in Green Valley should remain as an open channel supporting wetland vegetation. The steep slopes of finger canyons connecting to Indian Head canyon in the northeast portion of the specific plan area should be retained in natural open space. Main vehicle transportation corridors should be east -west Leucadia Boulevard, and north -south Quail Gardens Drive, Via Cantebria, and E1 Camino Real. There should be interconnected parks, bike paths, and trails. Surroundings Land adjacent to the Specific Plan area in the Leucadia Community is designated for low density single family residential use. To the north, properties carry a General Plan designation of Residential [0.51 -1.00 Units /Acre] with a corresponding zone classification of Rural Residential 1 [RR -1]. To the west, properties are primarily designated Residential [2.01 -3.00 Units /Acre] and classified Residential 3 [R -3] with some in the south designated Residential [0.51 -1.00 Units /Acre] and classified Rural Residential 1 [RR -1]. 4 -77 Along Leucadia Boulevard to the west of the Specific Plan area properties are mostly designated Residential [2.01 -3.00 Units /Acre] and classified Residential 3 [R -3]. Land south of the roadway between Saxony Road and I -5 is designated Residential [3.01 -5.00 Units /Acre] and classified Residential 5 [R -5]. There is a parcel at the southeast corner of the I -5 interchange designated Visitor - Serving Commercial and classified Limited Visitor - Serving Commercial [LVSC]. With implementation of land use designations in Leucadia and its Sphere of Influence, 2205 acres (75 %) of the 2953 acre community will be residential. Of 5479 dwelling units, 3904 (71 %) will be single family. Agricultural use will be preserved on 451 acres (15 %) of the community area. Ecological resources, open space, and parks will constitute 91 acres (3%) of the area. Eighty -four acres (3%) will be devoted to commercial uses. The community will remain predominantly residential with commercial uses along the Highway 101 corridor and at the Leucadia Boulevard /I -5 interchange. Vacant land and greenhouses throughout the community will be developed in residential uses. Land preserved for agriculture will be located in the east portion of the community. Steep slopes in Indian Head canyon and on bluffs of Green Valley and Batiquitos Lagoon will be retained in natural open space. Leucadia Boulevard will be extended to connect to Olivenhain Road, and Quail Gardens Drive and Via Cantebria extended to the north. Adjacent land in Old Encinitas is primarily designated for single family use at varying densities. To -he west land is designated Residential [0.51 -1.00 Units /Acre] with a corresponding zone classification of Rural Residential 1 [RR- 1]. To the south the Magdalena Ecke YMCA property is designated and classified Public /Semi- Public. Quail Botanical Gardens is designated and classified Ecological Resource /Open Space /Parks. Other lands are designated Residential [0.51 -1.00 Units /Acre], Residential [1.01 -2.00 Units /Acre], Residential [2.01- 3.00 Units /Acre], and Residential [8.01 -11.00 Units /Acre]. Respective corresponding zone classifications are Rural Residential 1 [RR -1], Residential 2 [R -2], Residential 3 [R -3], and Residential 11 [R -11]. Implementation of land use designations in Old Encinitas and its Sphere area will result in 1054 acres (60 %) of the 1656 acre community in residential uses. Of a total 4761 dwelling units, 1823 (38 %) will be single family. Commercial uses will occupy 180 acres (11 %) of the community area. There will be 29 acres (2 %) devoted to light industrial use. Ecological resources, open space, and parks will constitute 96 acres (6%) of the community. New development will be minimal and with most of it occurring as infill. There will be two distinct commercial districts in the same location as existing commercial uses along Highway 101 and Encinitas Boulevard. Light industrial use will be concentrated south of Encinitas Boulevard at Westlake Drive. Open space will be primarily found in parks in the area. Land adjacent to the Specific Plan area in New Encinitas is mostly designated for industrial, commercial and public uses. Property across E1 Camino Real in the north is designated and classified Light Industrial bordered by an Ecological Resource /Open Space /Parks designation and classification. Property across E1 Camino Real in the south is designated and classified Office Professional. The future post office site to the south is designated and classified Public /Semi- Public. Other Land immediately to the south is designated and classified Mobile Home Park [HMP] with and underlying designation and classification of Residential [5.01 -8.00 Units /Acre] and Residential 8 [R -8] respectively. With implementation of land use designations in New Encinitas and its Sphere, 1864 acres (78 %) of the 2413 acre community will be devoted to residential use . Of the total 8407 dwelling units, 6154 (73 %) will be single family. Two hund: 3 forty -three acres (10 %) of the community will be in commercial uses. Li t industrial use will constitute 55 acres (2%) of the community area. Ecologi =al resources, open space, and parks will occupy 145 acres (6%) of the area. Overall, land use will remain as it presently exists with some infill. 4 -85 Commercial uses will be concentrated along E1 Camino Real and Encinitas Boulevard. The light industrial land will be at the southeast corner of E1 Camino Real and olivenhain Road. Open space will be mostly in the Encinitas power transmission easement, Creek corridor and on nearby bluffs, in the major and in parks. Carlsbad General Plan and Zoning Ordinance The City of Carlsbad General Plan Land Use Map (Planning Department, 1992) indicates future conditions for both the Green Valley and Southwest La Costa communities immediately to the north and northeast of the Specific Plan area. is a combination district designated commercial, O Green Valley 5DU /AC]- Professional and Related, and [RMH] MediumBHig hD nsy i The corresponding zone classification is Planned Community Zone [PC]. This property is subject to the requirements of the East Batiquitos Lagoon /Hunt oastal Program (LCP). Properties Local C Future development would be expected to be clustered commercial, office, and multi - family residential on the valley floor. Development of the steep, chaparral covered bluff and riparian woodland along Encinitas Creek is restricted by policies of the LCP. The recent Green Valley Master Plan (P &D Technologies, 1992) devotes 600,000 square feet of the 281 acre community to a sub - regional, retail commercial center north of the Leucadia Boulevard extension and 400 multi - family dwelling units north of the center. The riparian corridor along Encinitas Creek and upland bluff at the west edge of the valley are set aside as natural open space preserves. Southwest La Costa is primarily designated [RLM] Low- Medium Density Residential [0 -4 DU /AC] and [RM] Medium Density Residential [4 -8 DU /AC] with some areas [OS] Open Space. Land abutting E1 Camino Real is designated [os) Open Space with parcels at olivenhain Road designated [TS] Travel Services Commercial, and [U] Public Utilities. Corresponding zone classifications are Planned Community [PC], Limited Control [LC], and Public Utilities [PU]. This community will remain predominantly residential with the Arroyo La Costa area mostly developed in these uses. A total of 1695 dwellings are projected by the Zone 12 LFMP. A small travel service center will be located at E1 Camino Real and olivenhain Road. Steep sloped areas along E1 Camino Real and riparian wetlands in Arroyo La Costa will be retained in open space. Calle Barcelona (Secondary Arterial /4 Lanes) will be extended through Arroyo La Costa. San Diego County General Plan and Zoning Ordinance San Dieguito Community Plan The Specific Plan area and YMCA /Sports Park, OMWD, Leaf, and Thornton properties are entirely within the San Dieguito Community Planning Area. As can be seen on Figure 4 -30, except for the Carter property all of the Specific Plan area and all of the other project properties are designated [AC] Agricultural Cropland in conjunction with [SPA] Specific Plan Area [2.8]. The Carter property in Green Valley is designated 24 Impact Sensitive Area [1 Dwelling Unit /4,8,20 Acres]. Land along Encinitas Creek and its tributary, from the Carter property north to the plan area boundary, is identified as Flood Plain. All properties are within the coastal zone boundary which lies along E1 Camino Real. In the San Dieguito Community Plan (Department of Planning and Land Use, 1987) the specific plan area is identified as the "Ecke Holdings" and described as a discontinuous island in the community planning area. Particular requirements guiding the development of this area are found in the Local Coastal Plan (LCP) under Policy 122. It is the goal of the community plan that the holdings be developed through a specific plan, that development take place either concurrently or after the plan is in place, and that no annexations take place without a master plan, and provision of right -of -way for Highway 680 ( Leucadia Boulevard extension). 4 -86 r. 00 v There are numerous community wide goals and policies in the Community Plan applicable to the specific plan area. In the Conservation Element it is noted that a portion of the Batiquitos Lagoon Resource Conservation Area [RCA] is located within the Ecke property at the southern most point of Green Valley. This remains an important part of the open space and drainage system that feeds into the lagoon. Several policies ensure that encroachment into sensitive areas is minimized, buffers provided, and natural features preserved. Encinitas Creek is identified as a significant floodplain and watercourse which flows into Batiquitos Lagoon and is subject to urban runoff. Development is prohibited within the floodway and any utilization of land next to E1 Camino Real would require installation of a flood control system. Policies and recommendations ensure watercourse setbacks, preservation of riparian habitat, and maintenance of watercourses in their natural state. Under the Recreation Element Quail Botanical Gardens is considered a regional park while Magdalena Park is the only community park in the community planning area. Local Coastal Program San Dieguito Land Use Plan The County of San Diego Local Coastal Program (LCP) San Dieguito Land Use Plan (Department of Planning and Land Use, 1984) contains numerous community wide and particular polices applicable to the County specific plan area. Considerable attention is given to environmentally sensitive habitats and agriculture. Identified sensitive habitats and individual species of note include coastal sage scrub, coastal mixed chaparral, riparian, and Encinitas baccharis. Numerous policies are devoted to preservation and protection of these sensitive biological resources. Prime agricultural lands are defined as those producing or capable of producing commercial food crops. A number of policies are established to preserve such lands over the long -term. There are several particular requirements under Policy 122 governing the development potential of the specific plan area. Agricultural Cropland with a Specific Plan designation and density designator [SPA 2.8] may be developed for residential purposes pursuant to Board of Supervisors Policy I -59, Large Scale Project review. Approval can only be gained through development of a plan for the entire contiguous ownership and finding that continued exclusive agricultural use is no longer feasible, or that development of a portion of the lands will enhance the feasibility of agricultural use of the balance of the property. Development must reserve at least half of the lands suitable for agriculture for that use. Total dwelling units on the developed portion of the lands shall not exceed the number obtained by multiplying the total acreage of the overall plan, exclusive of wetland areas, by a density factor of 2.8. Additional requirements include permanent protection for the agricultural portion of the plan area, a minimum size for agricultural areas of 40 contiguous acres, selection of suitable agricultural areas based on Class I -IV soils on slopes under 10 percent either in production or having potential for production, and locating and clustering new development to reduce conflicts with agricultural activities. Ih direct reference to the Ecke holdings the development plan shall concentrate residential uses in Green Valley. However, in the event that all development cannot be accommodated within the valley, additional areas distinct from the basic mesa -top agricultural area may be considered for development if such development would complete a logical and viable neighborhood and establish a stable limit to urbanization. Buffer zones shall be established between field crops and residential areas, clauses included in deeds for new residential areas recognizing negative effects of nearby agricultural activities, and access controlled to protect agricultural activities. Regional Land Use Element The County specific plan area lies entirely within the San Dieguito area of the San Diego County Regional Land Use Element and is classified as a 1985 Current Urban Development Area (Mapping Section, 1990). All of the specific plan area except the Carter property are within the Ecke Agricultural Preserve No. 1 (Mapping Section, 1990). The bluff and Green Valley are within the Batiquitos 4 -88 Lagoon Resource Conservation Area [RCA] No. 46 (Mapping Section, 1988). The Regional Land Use Element (Department of Planning and Land Use, 1990) contains policies related to Regional Categories, Land Use Designations and Use Regulations, Community and Subregional Plans, and Regionwide Action Programs. There are a total of eight Regional Categories to guide development within the unincorporated area of the County. The Current and Future Urban Development Area Categories taken together constitute the Urban Development Area. The Current Urban Development Area [CUDA] includes those County lands to which near -term urban development should be directed. The outer boundary of the Urban Development Area constitutes an Urban Limit Line outside of which development will not occur during the life of the plan (1995). The land use designations shown on community plans are used to implement the regional categories. Special Purpose Designations are applied in certain circumstances. Those of note for the specific plan area are [21] Specific Plan Area, and [24] Impact Sensitive. The 21 designation is used where a specific plan has been adopted or must be adopted prior to development. Land in this designation typically has environmental constraints or unique land use concerns which require special land use and /or design controls. The 24 designation is applied to areas considered unsuitable for urban development for reasons of public safety or environmental sensitivity. Large -lot residential parcels, extraction, or greenbelts connecting permanent open space areas may be compatible with this designation. The designation includes such areas as floodplains, wetlands, steep slopes, wildlife habitat, floodways, faults, and landslide areas. Where some unique physical, legal or resource situation exists, a Special Area Overlay shall be used. Pertinent overlays for the specific plan area are Coastal (C) and Resource Conservation Areas (RCA). The Coastal overlay applies to lands in the coastal area including beaches, bluffs, and immediately adjacent areas. The purpose is to protect the public interest in the coast line as a unique recreational and scenic resource. The RCA overlay identifies lands such as native wildlife habitats, construction quality sand areas, unique geological formations, and significant archaeological and historical sites which require special attention in order to conserve resources. Appropriate implementation actions may include public acquisition, open space easements, cluster or large lot zoning, scenic or natural resource preservation zones, or other considerations. Scenic Highway Element E1 Camino Real and Interstate 5 are identified on the Scenic Highway System Map as part of the San Diego County Scenic Highway System (Mapping Section, 1987). According to the Scenic Highway Element (Department of Planning and Land Use, 1986) the system consists of the map and a Scenic Highway System Priority List. The goal of the Scenic Highway Element is to create a network of County scenic highway corridors within which scenic, historical, and recreational resources are protected and enhanced. A pertinent objective to accomplish the goal in this case is to protect and enhance scenic resources within designated scenic highway corridors. Zoning Ordinance Use Regulations The primary corresponding zone classification for the Specific Plan and other project properties is 5 -88 with Special Area Regulations "A" and "R" designators. The Carter property is classified 5 -90 with Special Area Regulations "R" and "F" designators. The 5 -88 classification allows certain residential, civic, commercial, industrial, and agricultural uses. After adoption of a specific plan any use defined in that plan is allowed. The 5 -90 classification is a holding area used to prevent premature urban or non -urban development until more precise zoning regulations are prepared. Permitted uses are similar to 5 -88. Special Area Regulations designator "A" pertains to Agricultural Preserve. Designators "R" and "F" pertain to Coastal Resource Protection Area and Flood Plain respectively. 4 -89 Agricultural Preserve Area Regulations Zoning Ordinance Agricultural Preserve Area Regulations (San Diego County Zoning Ordinance Section 5100 -5110) aid in the implementation of the California Land Conservation Act of 1965, or Williamson Act. The Act is intended to encourage the preservation of productive agricultural lands. An Agricultural Preserve Designator "A" is applied to those lands in the County which are subject to agricultural use regulations and which have been designated as being within an agricultural preserve in accordance with the Act. Uses for lands under Land Conservation Act contract are restricted to those set forth in the contract. Uses for other lands in the preserve are set forth by the applicable use regulations except those subject to use permits. Use permits can only be granted if the use complies with the Land Conservation Act (Williamson Act) and is compatible with continued agricultural use in the preserve. Coastal Resource Protection Regulations Zoning Ordinance Coastal Protection Area Regulations (San Diego County Zoning Ordinance Section 5950 -5957) protect and preserve sensitive resources within the California Coastal Zone and assure that development, use, or alteration of land within major areas of environmental sensitivity, steep slopes, major drainage ways, and outstanding scenic quality is reviewed and approved in accordance with criteria, standards and limitations that protect coastal resources. A coastal resource designator "R" is applied to locations identified in the Local Coastal Program Land Use Plan as coastal resource protection areas. Both Coastal Act and Planned Development permits are required with additional standards and criteria applied for steep slopes, habitat protection, grading, and drainage. Floodplain Area Regulations Zoning Ordinance Flood Plain Area Regulations (San Diego County Zoning Ordinance Section 5500 -5522) protect the public health, safety and welfare and reduce the financial burden on the County and its inhabitants and property owners by eliminating or reducing the need for the construction of flood control channels, dikes, dams and other flood control improvements that would be required if scattered and unplanned development is permitted to occur. A flood plain designator "F" is applied to properties not planned for channelization which are subject to inundation. Permitted uses are those identified by applicable use regulations, and any irrigation structure. No building or structure can be placed, erected, constructed, altered or enlarged within the area subject to the Flood Plain Area Regulations except in accordance with such regulations, and provisions of the San Diego County Code. Other San Diego County Ordinances and Policies Resource Protection Ordinance The Resource Protection Ordinance (Compilation of Ordinance Nos. 7739, 7685, and 7631 (New Series)) establishes special controls on development for the County's wetlands, floodplains, steep slopes, sensitive biological habitats, and prehistoric and historic sites. The Ordinance permits only certain uses as well as requires particular development standards and criteria within the various categories of sensitive lands. Hillside Development Policy The purpose of the Hillside Development Policy, I -73 (Board of Supervisors, 1989) is to minimize the effects of disturbing natural terrain and provide for creative design for hillside development. It is the policy that development of building sites in hillside areas be planned and constructed in such a manner as to preserve, enhance, or improve the physical features of the area consistent with providing building sites, while at the same time optimizing the aesthetic quality of the final product. All hillside subdivisions should be designed to minimize 4 -90 the permanent impact on site resources. The resources include but are not limited to existing natural terrain, established vegetation, visually significant geologic displays, and portions of a site which have significant public or multiple -use value. Large Scale Project Review Large Scale Project Review, Policy I -59 (Board of Supervisors, 1988) establishes a policy that a major use permit, zone classification, or major subdivision necessary to accommodate a large scale project shall not be approved unless and until there has been provided adequate assurance that the project is consistent with laws and local ordinances, is in conformance with the General Plan, is compatible with adjacent development, is consistent with growth management policies, and public services and facilities are available or reasonably expected to be available at the time of need. A specific plan is required in order to implement the General Plan in those areas of the County for which a large scale project is proposed. 4.7.2 ENVIRONMENTAL EFFECTS Land use compatibility impacts are significant if there are conflicts because of disparate uses. Conflicts result in negative effects on community character. The Specific Plan is intended to maintain agricultural heritage while providing for development that complements the character of the existing and future surrounding communities. Specific Plan land uses and their locations were selected in response to issues, constraints, and opportunities provided by a task force made up of community representatives. Although this process results in avoidance of most land use impacts there will be a number of potentially significant community character conflicts. Current Land Uses and Community Character Compatibility Land use impacts encompass a broad range of physical effects which can affect community character in an adverse way. A project may introduce a particular use into a community which is completely different in a negative sense than any other use in the area. Also, a project might not be unusual in use, but of an intensity that generates excessive activity for the area. Project Area It is assumed that the YMCA /Sports Park, Leaf, and Olivenhain Municipal Water District properties will continue to be used in the near -term as currently developed and there will be no change their character. Implementation of the Specific Plan and development of the Thornton property will noticeably alter the current use and character of these properties. on the upper mesa, large open agricultural fields will be converted to a golf course with single family residences along the north and west perimeters. In Green Valley, open agricultural fields will be replaced by a regional commercial center, multi- family residential complexes, and mixed uses. With Land Use Plan A, agricultural activities in the western sector along Saxony Road will be converted to single family residences, school, and mixed uses. With Land Use Plan B some agricultural activities will be converted to single family residential, community use, and mixed uses. Improvements to Leucadia Boulevard between I -5 and Sidonia Street will noticeably alter the character of the roadway by widening it from two to four lanes. There will be associated alterations including sidewalks, landscaping, and noise attenuation barriers. Although considered major, these changes in land use and character are not significantly adverse. A semi -rural feeling will be maintained on the upper mesa because of the large expanse of agricultural land, golf course, and natural open space bluff and finger canyons. The single family and mixed uses will be situated adjacent to similar or generally compatible uses in the surroundings, 4 -91 and not unusual or of much greater intensity. In Green Valley, even though the uses will be a marked departure from the current condition, surrounding uses are similar or generally compatible. Specific Plan uses will not be unusual or of much greater intensity than found elsewhere in the valley. With phasing, the conversion of uses will be spread over time rather than occurring all at once, allowing a reasonable adjustment to the change. Although there will be an increase in the intensity of vehicle activity on the improved section of Leucadia Boulevard, no new use will be introduced. Roadway improvements from two lanes to four lanes in an urbanized area is not considered to be a substantial upgrade. Further, the basic character of the individual properties or neighborhoods along the boulevard will not be altered because of the change. Surroundings Specific Plan land uses in the community of Leucadia, will be generally compatible with surrounding current uses. Specific Plan land uses will not be unusual or of much greater intensity. In the northern sector of the Specific Plan area the single family residential, golf course, and natural open space uses will be similar to the surrounding single family, agricultural, and open space uses. In the southern sector, Specific Plan uses including single family residential, golf course, school, community use, and agriculture will also be similar to the overall semi -rural setting. For the Quail Hollow East planning area, natural open space on the bluff will abut natural open space use on the House of Mazda property and to the east. Specific Plan open space at the northwest perimeter will provide a buffer for adjacent Mazda agricultural uses. Specific Plan natural open space along the western perimeter will provide a buffer between the golf course and natural open space use in Indian Head canyon to the west. Although single family use is generally compatible with church use, because the House of Mazda is primarily a religious retreat, conflicts could arise because of the close proximity of Specific Plan residential development to the Mazda buildings. Quail Gardens Drive will extend into the Specific Plan area at standards similar to existing connecting roads. In the North Mesa planning area, natural open space will abut open space use along the bluff as well as lie between the golf course and open space of Indian Head canyon along the west perimeter. There may be conflicts with natural open space at the western perimeter where the single family, or optional multi - family or hotel /inn optional uses would be placed at the boundary. For the Sidonia East planning area, single family residential use of similar density will be located adjacent to the existing Fox Point and Passidonia Knolls single family neighborhoods. However, there could be conflicts between the new development and established neighborhoods. Leucadia Boulevard will be extended into the Specific Plan area at standards similar to the improved section to the west. For the South Mesa planning area, single family residential use with minimum one -half acre lot size, and golf course use will abut natural open space and scattered residential dwellings on large parcels. For the East Saxony planning area with Land Use Plan A there may be conflicts between the elementary school and single family residential use, and adjacent agricultural greenhouse use to the north. With Land Use Plan B, agricultural use will be similar to the current agricultural use to the north. However, there could be conflicts between Specific Plan community use and the existing low density residential and open space use to the north. For the Quail Gardens East planning area with Land Use Plan A, single family residential use with one -half acre minimum lot size will be similar to the existing adjacent large residential parcels and open space use to the north. With Land Use Plan B, the same compatibility will hold for the single family relationship, but there could be conflicts between the Specific Plan community use and adjacent residential use to the north. 4 -92 Specific Plan land uses in the community of Old Encinitas will also be generally compatible with current surrounding uses. Specific Plan land uses will not be unusual or of much greater intensity. These uses, including single family residential, school, agriculture, community, and mixed use will be similar to the surrounding relatively suburban setting. For the West Saxony planning area the amphitheater or theater, and community service office buildings will be compatible with the existing sports park to the south and I -5 to the west. If multi - family residential and office uses are placed in the area instead, they will also be compatible with the sports park to the south. In this case a 200 foot buffer will be provided between residential uses and I -5. However, any of these uses could result in conflicts with the existing single family residential and agricultural uses to the north. In the East Saxony planning area with Land Use Plan A, commercial and office use will be compatible with the adjacent hospital to the south and YMCA /Sports Park across Saxony to the west. There could be conflicts between the Specific Plan multi - family and community uses, and Quail Botanical Gardens and open space uses adjacent to the south. The possible expansion of the botanical garden will be clearly compatible with the existing gardens. With Land Use Plan B there could be conflicts between Specific Plan community use, and Quail Gardens and open space uses to the south. For the Quail Gardens East planning area with Land Use Plan A, the single family use with open space buffer will be compatible with the existing Quail Park residential neighborhood. With Land Use Plan B there may be conflicts between the agricultural and community use, and Quail Park to the south. Quail Gardens Drive will be extended into the Specific Plan area at standards similar to the existing roadway. In the South Mesa planning area, agricultural use with both Land Use Plans A & B could result in conflicts with the adjacent Pacific Serena residential neighborhood to the south. Development of the Thornton property as single family residential will be compatible with existing adjacent residential neighborhoods to the south. Specific Plan land uses in the community of New Encinitas will be generally compatible with current surrounding uses. Specific Plan land uses will not be unusual or of much greater intensity. These uses including multi - family residential, mixed, and regional commercial will be similar to the relatively urbanized setting. For the Green Valley planning area the multi - family, mixed, and regional commercial use will be compatible with existing vacant graded parcels and office use across E1 Camino Real to the east. The greenbelt and recreational area along the Encinitas Creek tributary will provide a buffer for the existing undeveloped natural open space uses across the road. There could be conflicts between the mixed use and Park Encinitas mobile home neighborhood. Conflicts may also arise between the regional commercial use and agricultural and natural open space uses adjacent to the north. Leucadia Boulevard, Via Cantebri and Garden View Road will be extended into the Specific Plan area at standard: similar to the existing roads. Future Land Uses and Community Character Compatibilit Project Area The YMCA /Sports Park and Thornton property land use designation and zoning remains consistent with their existing General Plan designation and Zoning Code classification. The developed residential condition of the Leaf property will be consistent with its General Plan designation and Zoning Code classification. The developed public service condition of the Olivenhain Municipal Water District will be consistent with its General Plan designation and Zoning Code classification. The Specific Plan is generally responsive to applicable General Plan goals, policies, and provisions. The Special Study and Scenic Corridor Overlays are considered and the Specific Plan incorporates the essential links and classifications of the General Plan Circulation, Recreational Facilities, and 4 -93 Bikeway Facilities Plans. The steep bluffs along Green Valley are designated natural open space. An open environmental channel will be provided for the Encinitas creek tributary. Most of the steep slopes of the finger canyons in the north are designated natural open space. Extensions of Leucadia Boulevard, Quail Gardens Drive, Via Cantebria, and Garden View Road will ensure adequate vehicle access. There are bikeways and recreational trails, passive natural open space, and an active sports field area. In addition, the Specific Plan is also generally responsive to the framework for future conditions of the specific plan area established by the General Plan. Low density single family (3 du /ac) use is located on the upper mesa north of Leucadia Boulevard, and agricultural and golf course open space use is provided for the upper mesa south of Leucadia Boulevard. Conditions are included to ensure continued agricultural use in blocks of at least 40 acres in size. Surrounding uses are located, clustered, and buffered to avoid conflicts. There are commercial, office, institutional, and residential uses in Green Valley. Road extensions other than E1 Camino Real provide access to this area. Likewise, improvements to and the extension of Leucadia Boulevard are generally responsive to the General Plan framework for this roadway. Design is for a scenic roadway fitting community character. There are special grading considerations through the bluff, and landscaped medians and parkways. Buffers, including berms, noise attenuation walls, and landscaping will be provided. A land bridge corridor over the roadway through the bluff and road bridges over the Encinitas Creek tributary will allow passage of wildlife. The Specific Plan is inconsistent with the General Plan in some respects. An overview is provided below with a detailed identification of inconsistencies with particular General Plan goals and policies presented in the following subsection devoted to this subject. There will be encroachment Of steep slopes, primarily in the finger canyons Of the Quail Hollow East and North Mesa planning areas. There will be corresponding encroachment into sensitive sage scrub habitat in these areas. Development in Green Valley will intrude into the Encinitas Creek tributary floodplain and sections of the natural channel will be relocated. The extensions of Leucadia Boulevard and Via Cantebria are not consistent with their Circulation Plan classifications. As to the framework, the Specific Plan includes uses on the northern upper mesa not anticipated by the General Plan such as the optional multi - family or hotel /inn. There are also unanticipated uses on the southern upper mesa in the West Saxony, East Saxony, and Quail Gardens planning areas. Under the mixed use category are multi - family, commercial, and office uses. Other unanticipated uses are community including such activities as an amphitheater, and an elementary school. Total Specific Plan development potential exceeds the 25,000 ADT ceiling established by the General Plan. Surroundings Any future improvements to the YMCA /Sports Park will be compatable with future uses surrounding the property. The YMCA is expected remain to the south in the future as a public /semi - public use. There will be Specific Plan mixed uses to the north. Any redevelopment of the Leaf property will be compatible with its surroundings. Land to the north and west carries the same residential density. To the east will be the Specific Plan golf course, while to the south will be Specific Plan low density residential dwellings. Development of the Thornton property will be compatible with future surrounding residential uses at similar densities to the south, east, and west. However, there could be conflicts with Specific Plan agricultural uses in the South Mesa planning area to the north. Continued use of the Olivenhain Municipal Water District parcel as a reservoir site and possible construction of an additonal above ground reservoir could result in conflicts with Specific Plan single family residential use to the north. 4 -94 Specific Plan land uses will be generally compatible with future uses and overall residential character in the Leucadia community in accordance with General Plan designations. Specific Plan land uses will be similar to that of the surroundings, not unusual, and not of much greater intensity. In the Quail Hollow East planning area, the single family development at 3.00 du /ac will be only two density levels higher than the 0.51 -1.00 du /ac designation to the north, and the same as the 2.01 to 3.00 du /ac designation to the west. Golf course and open space use will also be compatible with the surrounding open space use. There could be conflicts between Specific Plan residential use and continued religious retreat activities on residentially designated land adjacent to the north. The extension of Quail Gardens Drive as an Augmented Local roadway will be consistent and compatible with the General Plan Circulation Plan system for the community. For the North Mesa planning area the same residential use and density relationships will occur. However, conflicts could arise at the boundary between the Specific Plan optional multi - family at 10.00 du /ac or hotel /inn uses, and future open space and single family use at 2.01 -3.00 du /ac on land adjacent to the west. In the Sidonia East planning area the residential use and density will be the same as the designation for adjacent properties. However, there may be conflicts resulting from the placement of new development next to the established Fox Point and Passidonia Knolls neighborhoods. The extension of Leucadia Boulevard as an augmented Major roadway will be compatible with the Circulation Plan system for the community. In the South Mesa planning area, the residential use at 0.50 du /ac will be the same as the 0.51 -1.00 du /ac density residential designation for adjacent properties to the south. Golf course use will also be compatible with this designated use. In the East Saxony planning area with Land Use Plan A, there could be conflicts between the school and future single family residential development as designated at 2.01 -3.00 du /ac. The Specific Plan single family use at 0.50 du /ac will be the same as the designated use and density to the north. With Land Use Plan B there could be conflicts between the agricultural use and future residential use as designated to the north. For the Quail Gardens East planning area with Land Use Plan A, residential use at 0.50 du /ac will be the same as the adjacent designation to the north. With Land Use Plan B the residential relationship will be the same. However, there could be conflicts between the community use and low density residential designation to the north. Specific Plan land uses will also be generally compatible with future uses and mostly residential character in the Old Encinitas community in accordance with General Plan designations. Specific Plan land uses will be similar to that of the surroundings, and not unusual or of much greater intensity. For the West Saxony planning area the mixed uses will be compatible with continued YMCA uses under the public semi - public designation to the south and I -5 under the transportation designation to the west. However, there could be conflicts between the amphitheater or theater and community service office buildings, and adjacent single family residential designation at 0.51 -1.00 du /ac to the north. Conflicts could also arise if multi - family use is implemented instead of the community use. In the East Saxony planning area with Land Use Plan A, commercial and office use will be compatible with continued hospital activities on a portion of the adjacent residentially designated land. Conflicts could arise if this property is ever redeveloped at 1.01 -2.00 du /ac. Conflicts could also arise between the Specific Plan multi - family use at 20 du /ac and residential development of the vacant portion as designated. There may also be conflicts between Specific Plan community uses, and continued botanical garden or other open space uses under the ecological resource /park /open space designation to the south. An expansion of the botanical gardens would be clearly compatible with continued garden or other open space use. With Land Use Plan B there may be conflicts between the agricultural use and future residential use to the south. 4 -95 For the Quail Gardens East planning area with Land Use Plan A, the single family use at 3.00 du /ac and open space will be identical with the designated use and density for the Quail Park neighborhood. With Land Use Plan B, there may be conflicts between the community and agricultural uses and continued residential use as designated to the south. The extension of Quail Gardens Drive as an Augmented Local roadway will be consistent and compatible with the Circulation Plan system for the community. In the South Mesa planning area there could be conflicts between the agricultural use and continued residential use of the Pacific Serena neighborhood as designated. The residential designation and density for the Thornton property is similar to and compatible with surrounding adjacent residential designations of 5.01 -8.00, 0.51 -1.00, 1.01 -2.00, and 2.01- 3.00 du /ac. Specific Plan land uses in the New Encinitas community will also be generally compatible with future uses and mixed light industrial, commercial, office, and residential character in accordance with General Plan designations. Specific Plan land uses will be similar to that of the surroundings, and not unusual or of much greater intensity. For the Green Valley planning area the regional commercial use will be compatible with future development on adjacent land to the north in Carlsbad designated for commercial, professional, and medium -high density use. The extension of Via Cantebria as an augmented Collector roadway will be compatible with the Circulation Plan system for the community. There will be a greenbelt and recreational area buffer along El Camino Real. Further, Specific Plan commercial and mixed use will be compatible with development across the roadway in accordance with light industrial and office professional designations. Specific Plan mixed use will also be compatible with a post office under the adjacent public semi - public designation adjacent to the south. There could be conflicts between Specific Plan mixed use and continued mobile home use as designated for the Park Encinitas neighborhood. 4.7.3 MITIGATION MEASURES The Specific Plan General Planning Standards require landscape buffering along perimeters of the Specific Plan area to create transitional zones between land uses and to delineate them as distinct localities. Requirements for the buffer between agricultural areas and existing or future development are presented in the following subsection entitled Agriculture. For other uses a buffer between Specific Plan uses and existing or future development will be required. In addition the Specific Plan requires buffers for natural open space areas as described in the previous subsection entitled Biology. Standards for the buffers are as follows: Landscape Buffer Between Proposed and Existing Development. New residences will be required to have a rear yard of at least 25 feet in depth and a wall and /or fence will separate the existing properties from the new homes. Landscaping along these property lines should be botanically compatible with plant materials on neighboring properties. This buffer is for the Quail Hollow East, East Saxony, and Quail Gardens East planning areas. Edge Conditions. This buffer may have three conditions: on -site upslope, downslope, or at grade. Upslope and downslope conditions will involve creating a maximum 2:1 manufactured slope of varying width and height. In order to maximize view opportunities, trees should be clustered and shrubs should be planted sufficiently down the slope to preserve existing views. Vegetation in these landscape buffers shall be comprised of a mix of evergreen and deciduous trees and low maintenance, drought tolerant shrubs and groundcover. Plant materials will be arranged in informal drifts to convey a quasi - rural character and natural appearance. This buffer is for the Quail Hollow East planning area. 4 -96 Blended Transitional Zone. Typical blended transitional landscaping will include a mix of drought tolerant native plant materials with limited ornamental species in developed areas. This zone is intended to provide adequate screening of proposed development which will be located adjacent to recreational and open space areas. Landscaping will allow views between neighboring uses while separating them as distinct areas. Buffer /Screen Landscape Treatments. This buffer is for three particular locations. Around the existing and future water tank(s) in the North Mesa planning area landscape screening will be required to visually screen the facility. A fifteen (15) foot minimum residential yard setback will be required and dense plantings of trees and shrubs will surround the water facility parcel. Between the school site and existing or future residential development a densely vegetated 2:1 slope of variable width and a wall or fence placed on the property line will be required. In West Saxony along the north and west boundaries buffer /screen landscaping will consist of dense plantings of shrubs, vines, and trees of varying heights. Such landscaping should be designed to discourage human intrusion, while also obscuring views between the adjoining uses year- round. The Specific Plan Design Guidelines, Special Treatment Zone requires more intense landscape treatment for high intensity land uses including the regional commercial, mixed use, and multi - family areas. The optional multi - family and hotel /inn uses in the North Mesa planning areas are also subject to this zone. Standards for the zone are as follows: Special Treatment Zone. Plant materials and design in this zone should be used to create an identity for specific facilities and help visually integrate these areas into their larger environmental context. Special treatment zones shall consist of large specimen trees, flowering shrubbery, ground cover, annual color, and turf which will punctuate these areas. Each zone should incorporate the Specific Plan wide landscape theme but also develop their own distinctive landscape characteristics. Finally, it is noted that a rezone or major use permit will be required respectively to implement the optional multi - family or hotel /inn uses in the North Mesa planning area. Any additional buffer conditions or other particular considerations will be made conditions of any approval. The above measures will reduce any current and future land use and corresponding community character conflicts between disparate uses to a level of insignificance. 4.8 GENERAL PLAN CONSISTENCY 4.8.1 EXISTING CONDITIONS There are numerous city wide and particular Encinitas General Plan goals and policies applicable to the City specific plan area. These goals and policies are listed in Table 4 -8 with those particular to the specific plan shaded for easy reference. Applicable community wide and particular San Diego County San Dieguito Community Plan and Local Coastal Program goals and policies are listed in Tables 4 -9 and 4 -10. Goals and policies directed to the specific plan are shaded for convenient reference. 4.8.2 ENVIRONMENTAL EFFECTS General Plan consistency impacts are significant if adopted general plan goals and policies are not met. Although the Specific Plan adheres, for the most part, to the Encinitas General Plan there are some inconsistencies with certain goals and policies. 4 -97 U) 4J ..4 4 r•1 O a b a ro N r♦ ro O C7 C ro a .-1 ro a, C C9 N ro C U C W OD Q) ri ro H 4 -98 O c �+ N O 4, r r ac, v J J J r p CL L ILO V C L a > W W w C T W toil V Q W O U 3 v L C 01 'O J 'O L rL C c •� V W W L 41 c •! C O m N W W O E L r X Im C O •r M \ J 3 V C N a u W O N •44 W C d U W W 4+ O. •O W 4J aL+ O r 4+ W O 3 L L c N U W •u O C C W O . :3 C 8 N O Y U W r W J L W E r L Y M W 'O L W L v- E u r O L L T N C G 3 L) (C W L C L W N W 7 O. M W Of U •r L u L. •� W B O t V N W C L d C J T C Y N W U E d > 7 O L •4) N r W �1 i 7 U Y L L C 1 L C W J i' N 41 E 4-• M W U L W W L W W W W CL N pew O 41 41 1, O C 41 C 4+ C u •r N W 4+ > u 4+ W 7 W > •C U V L O C W E p p 3 L N W N N Y W Y J C L L W T E C O c 4+ 44 L 41 46 v° n E W m J L r O 1.1 4+ E yp Y Y •� 7 E 41 W w 4' O oc, E N G aW+ w ■ Y W O a N — W L. 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W r W C W L S N W p O W C G W n L . a�H n C N d E O L W C L E n 7 O)— O C W iltl �. . < ; W W O � m r Q L W O L w Y c 7 u •r O iii W ::::i0f is :ii b::ili ': . d:: ; W u O 'O N N C W O W �W W N > W W f > : : ..... .MJ w O O I n Oc L C W U L 7 U W U 7:::<, A :::�3t: IT W C a v a a e O Q _+ L O T 4• N W W Y S L N •r L ``::Z%:2'.::a:; r: r::! ew:::..: i:: v.,..>:.>::<:Ilt:;%r;::f�::::;: is :iic!F.:.:::�e i;,�f,.::. ::: :::':::::::.�{�, ?ri:::::•. 57::: '; `Jii N::iy:::i :o;SF: N L r Y c W L •r W �_ p W L • W n L. CL W _ c C < W L < W O 2 4- C O) L H W n - +:i:i:i;:QQ`.i < ii>; ii;:. i! i>iy +>;'. .:ii i3::N' iii;:= ;iiii L j:. `iii E1::3!!:ii :i iii ii 2iirii ? %A i:iQ::�::... ii i a:::: C >- L N m 7 F W �- 6 aW+ :::: ii.::i:: ii:i::i::::? : N CL go 0 1 1 1 1 4 -119 d' OD m N N b f. rd a !d Cd tyl C C fd a 44 O C 4.. Id a Q1 Q u $4 0 0 N Land Use Element Where the Land Use Element is focused on maintaining balanced land uses in the City (Goal 1) , all policies are adhered to. The Specific Plan provides a broad mix of land uses including agricultural, open space, commercial, recreation, and residential. The single family residential character of the City will be preserved by providing new single family residential development adjacent to existing single family neighborhoods. At the same time a balance of housing will be achieved with the inclusion of multi - family dwellings in locations compatible with existing higher intensity development. Commercial and office uses will be mixed with the multi - family development to ensure the provision of necessary services. Selected locations are either compatible with, or will be adequately buffered for surrounding development. These areas are accessible to circulation element roads and in close proximity to existing commercial services. The regional commercial district in Green Valley will be a unified center, centrally located, and accessible from I -5 and principal circulation element roads. Safe access will be ensured by providing off - street bike paths, pedestrian sidewalks, and handicapped facilities. The regional and other commercial uses will broaden the City's economic base. Where the Land Use Element is focused on compatibility between existing and future development (Goal 6), all policies are applied. Specific Plan single - family residential use will be compatible with lot sizes and design for surrounding existing residential neighborhoods. Mixed uses along Saxony Road will either be compatible with, or appropriately buffered from surrounding residential development. In Green Valley the commercial district will be physically separated from residential uses on the upper mesa. The Specific Plan Zoning Ordinance and Design Guidelines will ensure compatibility in all locations. All policies under the Land Use Element focusing on urban design (Goal 7) are met. Each Specific Plan residential, commercial, and mixed use area is designed to incorporate elements of a Specific Plan design theme to create a harmonious and aesthetically pleasing community. The Specific Plan Design Guidelines address architectural elements and landscaping that allow diversity while maintaining a common theme to unite and distinguish the community. A public facility financing program will ensure proper coordination of street and other public improvements with phased development. In certain mixed use areas building heights to three stories will be allowed to provide community focus, and residential structures will not exceed 30 feet in height without Design Review approval. The Specific Plan Zoning Ordinance and Design Guidelines address detailed criteria for building setbacks, heights, and similar features. As to the Land Use Element dealing with environmental sensitivity (Goal 8), most city wide policies are adhered to. Net residential density allowance will be determined during design review. Specific Plan design, to an extent, considers special constraints under the Special Study Overlay and nearly all significant natural features will be preserved and incorporated into open space areas. With Land Use Plan A, approximately 136 acres, or 16% of the Specific Plan area will be preserved as natural open space. With Land Use Plan B, about 129 acres, or 15% will be preserved. This includes nearly all of the bluff and portions of the steep finger canyons in the northwest sector. Corresponding sensitive chaparral and sage scrub habitat will be preserved. The established tree line along the upper bluff edge will be kept partially intact and views protected. An environmental channel will allow riparian vegetation in the Encinitas Creek tributary. An open space land use designation and zoning classification will be applied, and passive uses limited to trails and overlooks will be allowed in these natural areas. Additional open space will be provided by the golf course and agricultural lands. The Specific Plan is inconsistent with several environmental sensitivity policies. Because of the magnitude of encroachment and alteration, the 4 -120 constraints of the Encinitas Creek tributary floodplain in Green Valley, steep slopes of finger canyons in the Quail Hollow East and North Mesa planning areas, and biotic habitat in these finger canyons under the Special Study Overlay Zone have not been fully considered (Policy 8.5). There will be substantial intrusion into the 100 year floodplain by the multi - family and regional commercial center structures in Green Valley (Policy 8.2). Associated fill will significantly redirect flood flows and requir6 modifications to the floodway by restricting the width of the environmental channel. Significant natural features represented by steep slopes in the finger canyons, sensitive sage scrub on these slopes, and the natural condition of the creek tributary have not been fully preserved and incorporated into all development (Policy 8.6). Nearly all of the Land Use Element environmental sensitivity (Goal 8) policies particular to the specific plan area are met. The Specific Plan includes a land use designation and zone classification for agricultural land on the upper mesa south of Leucadia Boulevard. Low density residential use at 3.00 du /ac is located on the mesa north of the boulevard. There will be mixed uses including commercial, office, community, and residential in Green Valley. Areas reserved for agriculture are the most suitable for production, in large blocks greater than 40 acres in size, and will remain under Williamson Act protection. New development will not inhibit continued agricultural use and buffer zones will be provided between agricultural areas and adjacent urban uses. Roads are sited to assure continued long term agricultural viability. Deeds for residences near agricultural areas can be restricted as necessary to protect agricultural operations. Further, the exact alignment of Leucadia Boulevard is identified in the Specific Plan, along with a land use designation and zone classification for the bluff and steep slope areas. Access to development in Green Valley other than E1 Camino Real is provided with extensions of Leucadia Boulevard, Via Cantebria, and Garden View Road. The Specific Plan will be completed and approved, and the area annexed prior to construction of the Leucadia Boulevard extension. Applicable General Plan goals, policies and provisions are incorporated into the Specific Plan. The Specific Plan design, Zoning Ordinance regulations, and phasing plan will enhance the feasibility of interim agricultural use of land designated for other uses as well as permanent use at buildout on land designated for agriculture. The Specific Plan will generate up to 68,037 average daily trips (ADT) and is inconsistent with the established vehicular traffic ceiling of 25,000 ADT (Policy 8.8). Where the Land Use Element is focused on preservation of open space (Goal 9), all policies are adhered to. If multi - family uses are implemented in the West Saxony planning area a minimum 200 foot wide setback will be required from I -5 or office buildings placed to provide a visual and noise buffer for residential use. A linear greenbelt along E1 Camino Real will provide a scenic park -like view to motorists. The Specific Plan Design Guidelines include Landscape Development Zones (LDZs) on portions of Leucadia Boulevard and Quail Gardens Drive for landscaping. Housing Element As to Housing Element attention to housing opportunities (Goal 1), all policies are met. The Specific Plan locates varying densities of residential use throughout to accommodate a variety of family sizes and income levels. With Land Use Plan A, smaller single family detached dwellings on small lots will be available in the East Saxony planning area. With both Land Use Plans A and B, dwelling units appealing to move -up buyers and larger families will be provided. Where the Housing Element pertains to quality of housing (Goal 2), all policies are adhered to. To achieve a balance of housing opportunities, multi - family units including townhomes, apartment complexes, senior citizen complexes, and residences over office and retail uses will be provided in the Green Valley 4 -121 planning area for both Land Use Plans A and B. With Land Use Plan A, multi- family units wil be provided in the East Saxony planning area. Multi - family units may also b, provided in the West Say!ny planning area. Nearly all of the Housing -lement po --cies focused on maintenance and preservation of housing (Goal �) are met. Single family and multi - family uses are planned for nearly 18% of ithe Specific Plan area with Land Use Plan A, and 21% with Land Use Plan B. The multi - family units are located in close proximity to, and within mixed use areas, away from steep terrain. Low density single family use will be clustered in small enclaves around the golf course mostly away from steep terrain and sensitive biological areas. Street trees will be planted and LDZs landscaped in accordance with Specific Plan Design Guidelines. All construction will be in accordance with state building and safety codes. The Specific Plan is inconsistent with the maintenance and preservation of housing policy discouraging residential development of steep slopes, canyons, and floodplains (Policy 3.11). There will be excessive encroachment into the steep slopes and finger canyons in the Quail Hollow East and North Mesa planning areas and intrusion into the Encinitas Creek tributary floodplain in Green Valley. Circulation Element All policies of the Circulation Element focused on a safe, convenient, and efficient transportation system (Goal 1) are adhered to. The extension of Leucadia Boulevard will provide a link between E1 Camino Real and I -5. Extensions of Quail Gardens Drive, Via Cantebria, and Garden View Road will complete the City's principal circula.�on system. Circulation within the Specific Plan area is planned to maintain. a Level of Service (LOS) C and Specifi Plan traffic will not cause intersections to exceed LOS D with certai. improvements. Major roads and prime arterials will serve as backbone streets, while collector and focal roads will serve individual neighborhoods, thereby preventing unwanted through and opportune -y traffic in residential areas. Roads are sited in response to topographic cond.tions to reduce grading. 'The Specific Plan transportation program encourages bicycle, pedestrian, and bus opportunities with bicycle lanes, sidewalks and trails, and bus stops. Adequate traffic signals and street lighting will be provided. Where the Circulation Element gives attention to roadway function and standards (Goal 2), all policies are met. The Specific Plan includes modified standards for road width, lighting, curbs, and other facilities in appropriate planning areas supporting low density residential and agricultural uses. These modified standards also apply to locations where there are similar standards for adjacent existing neighborhoods. All roads will be constructed to adopted standards before dedication to the City. A system of limited access collector and arterial r -lads will be provided to eliminate unwanted through traffic. There will be ndscape setbacks along Leucadia Boulevard and Quail Gardens Drive in appropriate locations. The Specific Plan Design Guidelines and Zoning Ordinance address building setbacks along roadways. All policies are applied where the Circulation Element relates to alternative modes of transit (Goal 3). Multi - family units in Green Valley will be at a density high enough to support mass transit facilities such as bus routes. Off - street pedestrian and bicycle facilities will connect the regional commercial district with mixed use and multi - family areas. Bicycle lanes, and pedestrian sidewalks and trails will link all areas of the Specific Plan to reduce reliance on automobiles. Handicapped facilities will be provided throughout the area. Circulation Element polices with attention to scenic highways (Goal 4) are all met. Landscaping including street trees will be required for all roaL4ays within the Specific Plan area in accordance with the Specific Plan Design Guidelines. Leucadia Boulevard, Quail Gardens Drive, and Via Cantebria extensions will have landscaped medians. A separate system of bicycle and pedestrian paths and trails will be provided. Truck traffic will be discouraged in residential locations. The Specific Plan Design Guidelines and Zoning Ordinance ensures that street 4 -122 lighting, curbs, and gutters will be compatible with adjacent existing neighborhoods. All utilities will be placed underground. Nearly all of the Circulation Element policies particular to improvements and the extension of Leucadia Boulevard east of I -5 (Goal 5) are adhered to. The Specific Plan will be adopted by the City and annexation accomplished with full design and improvement plans for Leucadia Boulevard as a scenic roadway. The Specific Plan will incorporate design standards established by the Leucadia Boulevard Task Force based on community input. The road design includes landscaped parkways and landscaped medians with pedestrian facilities. Earth berms, noise attenuation walls, and landscaping will be provided to buffer adjacent residential uses. The alignment through the bluff is sited to limit grading and a land bridge for wildlife will be provided across the roadway. There will be bridges over the Encinitas Creek tributary. Further, a detailed noise analysis of the improvement section of Leucadia Boulevard has been conducted considering build -out traffic volumes and attenuation zones identified. Additional analysis will be required to ensure appropriate attenuation on an individual parcel basis: 1CfE'enuation devices will be constructed in conjunction with street improvements, made of natural appearing materials and landscaping provided. Improvements and the extension will be phased in response to orderly development of the Specific Plan area. Certain segments of Leucadia Boulevard are inconsistent with the established 85 foot wide right -of -way for a Major Roadway (Goal 5). The boulevard right -of -way through Green Valley will be from 100 to 128 feet in width. In the Sidonia East planning area the right -of -way will be 100 feet wide. Where Circulation Element policies address funding the circulation system (Goal 7) all policies are met. The Specific Plan requires a public facilities program to ensure that new development will provide for costs of expansion of the circulation system. Certain Specific Plan roadways are inconsistent with corresponding Circulation Element Circulation Plan classifications. The Leucadia Boulevard extension through the Specific Plan area to E1 Camino Real as a Major Roadway with right - of -way widths varying from 70 to 128 feet will not be entirely consistent with General Plan major road right -of -way standards of 85 to 120 feet. A portion of the extension of Via Cantebria as an Augmented Collector Roadway is inconsistent with the Circulation Plan which shows the road segment as a Major Roadway. The Specific Plan location for Garden View Road is north of the Post Office property rather than south of the site as shown on the Circulation Plan. Public Safety Element The Specific Plan is inconsistent with Public Safety Element policies pertaining to land use planning and public safety (Goal 1). There will be development, grading, and filling of the Encinitas Creek tributary floodplain other than provided by Land Use Element Policy 8.2 (Policy 1.1). There will also be excessive encroachment of steep slopes in the Quail Hollow East and North Mesa planning areas (Policy 1.2). Resource Management Element As to Resource Management Element attention to the quality of water and groundwater resources (Goal 1) all policies are applied. The Specific Plan requires incorporation of water conservation in building design. The Design Guidelines encourage use of drought tolerant vegetation in landscaping. The San Elijo Joint Powers Authority plans to provide reclaimed water to the Specific Plan area in the future. Adequate sewage transmission and treatment capacity will be provided prior to or concurrent with development. All Resource Element policies pertaining to preservation of trees and habitat (Goal 3) will be met. Wherever possible, mature trees in the Specific Plan area 4 -123 will be preserved. In locations where trees must be removed they will be transplanted or replaced with similar species elsewhere in the area. The Design Guidelines Master Landscape Plan calls for planting of trees throughout the area, especially along streets. Nearly all of the Resource Element policies focused on community views, vistas, and aesthetic qualities (Goal 4) are adhered to. E1 Camino Real will be buffered from the regional commercial district in Green Valley by an environmental channel with riparian vegetation along the roadway. Additional landscaping will be provided within the commercial area. Leucadia Boulevard is designed as a scenic roadway and the Specific Plan Design Guidelines call for a Landscape Development Zone along the boulevard with full landscaping including parkways and medians. Although the Specific Plan Design Guidelines will ensure aesthetically pleasing building design in view of the roadways The Specific Plan is inconsistent with the community views, vistas, and aesthetic qualities policy for development design requiring that floodplains be left open (Policy 4.9). There will be intrusion into the floodplain in the Green Valley planning area. Where the Resource Element focuses on air quality (Goal 5), all policies are recognized. The Specific Plan is designed in response to regional air quality development planning mitigation measures to reduce dependency on the automobile. Mixed uses are provided near circulation element roads and existing commercial services. In addition, most of the mixed use multi - family housing is located in Green Valley near mixed commercial use and the regional commercial district. Mass transit opportunities as well as bicycle and pedestrian systems are included in Specific Plan design. All Resource Element policies pertaining to preservation of cultural resources (Goal 7) are met. A survey of paleontological, historical, and archaeological resources has been conducted and all resources properly documented. Grading monitoring will be required to protect any unknown resources that may be present. The Specific Plan recognizes the need for cultural facilities through provisions for theaters, museum and other facilities in the West Saxony, East Saxony, and Green Valley planning areas with both Land Use Plans A and B, and in the Quail Gardens East planning area with Land Use Plan B. Most of the Resource Element policies focused on plant resources and landscaping (Goal 9) are met. The Specific Plan Design Guidelines Master Landscape Plan encourages use of plant materials and irrigation techniques to conserve water and requires street trees along roadways. Landscaping of all residential, mixed use, and commercial areas will be required. The Encinitas Creek tributary will be contained in an open environmental channel supporting riparian vegetation and bridges required at crossings. Urban pollutant and sediment control will also be required. The Specific Plan is not fully consistent with the plant resources and landscaping policy to preserve natural drainage courses (Policy 9.9). The natural channel will be moved in some locations. Most of the Resource Element polices related to preservation of environmentally sensitive habitats (Goal 10) are adhered to. With Land Use Plan A there will be approximately 135.7 acres of natural open space preserved. With Land Use Plan B, about 129.1 acres will be preserved. The riparian corridor along the tributary of Encinitas Creek will be contained in an open environmental channel supporting riparian vegetation at no net loss, and designated and classified as open space. Large blocks of natural vegetation on the bluff supporting sensitive plants includ_._:g Encinitas Baccharis and in the northern finger canyons which also support sensitive plants will be designated and classified as open space. Further, the Leucadia Boulevard alignment is sited to avoid Encinitas Baccharis to preserve it on -site rather than transplanting it elsewhere. This roadway as well as Via Cantebria and Quail Gardens Drive have been sited to minimize 4 -124 encroachment of natural vegetation on steep slopes. Specific Plan design minimizes fragmentation of existing contiguous natural areas and a land bridge provided for wildlife to cross Leucadia Boulevard. A broad configuration of diverse, natural habitat is provided and nearby development areas clustered near edges rather than located within the natural areas. The Specific Plan is inconsistent with the preservation of environmentally sensitive habitats policy to minimize impacts on sensitive sage scrub through preservation of native vegetation on natural slopes (Policy 10.1). There will be excessive encroachment of steep slopes supporting sage scrub in the Quail Hollow East and North Mesa planning areas. In addition, the Specific Plan is inconsistent with the policy establishing design guidelines to conserve as much existing contiguous coastal sage scrub as feasible (Policy 10.5). There will be substantial encroachment into contiguous coastal sage scrub in these planning areas. As to Resource Element attention to preservation of agriculture (Goals 11 and 12) all policies are applied. The Specific Plan Zoning ordinance allows agricultural use in all zones to encourage on -going agricultural activities on land designated for other uses. With Land Use Plan A, 134.1 acres of land are designated and classified for agricultural use, while 126.0 acres are similarly set aside with Land Use Plan B. Crop selection will emphasize poinsettia production in greenhouses and on environmentally controlled fields to minimize conflicts with surrounding urban uses. other land uses are also located to avoid conflicts with agricultural activities and buffers will be required. Areas designated for agricultural use have been selected based on their suitability for production. Where the Resource Element focuses on land use policy and resource management (Goal 13) all policies are met. The specific Plan is designed to minimize pollution and grading impacts. Land uses are located to be compatible with natural and agricultural areas, and buffered from major thoroughfares. Creation of a totally urbanized area is avoided by maintaining large blocks of natural open space and providing golf course and agricultural uses. Wildlife corridors are maintained or established with the land bridge. All policies of the Resource Element pertaining to environmental impacts from new development (Goal 14) are met. Specific Plan design is intended to limit grading and removal of vegetation. The Design Guidelines Master Landscape Plan includes requirements for landscaping all manufactured banks. The environmental channel for the Encinitas Creek tributary will provide urban pollutant and sediment control to protect downstream riparian and coastal lagoon resources. Hydrologic and sediment control measures will also be provided elsewhere in the Specific Plan area. Grading in the winter season will be limited in accordance with City requirements. All policies of the Resource Element addressing energy conservation (Goal 15) are applied. The Specific Plan requires use of passive solar design concepts and the patterns of land uses maximizes opportunities for solar energy use and energy conservation. Recreation Element As to the Recreation Element focus on development of new park and recreational facilities (Goal 1) all policies are met. The environmental channel for the Encinitas Creek tributary will support riparian habitat. The 29.8 acre Magdalena Ecke park will be maintained as a passive community park with a hiking trail System. other trails will be provided through the natural open space areas. The trail system links the various neighborhoods together. Natural open space is balanced with active recreational use by providing sports fields in the Green Valley planning area. In addition, a 173.4 acre 18 hole public golf course will be located on the upper mesa. Where the Recreation Element addresses preservation of open space resources (Goal 2) all policies are applied. Sports fields are provided in Green valley in and 4 -125 along the floodplain and there will be an interconnected system of trails and bicycle paths throughout the Specific Plan area. Magdalena Ecke Park, which is under public ownership will be maintained in a natural state and balanced with the active sports field uses. Noise Element Nearly all of the Noise Element land use planning (Goals 1, 2 and 4) policies are adhered to. An acoustical study of the improvements to Leucadia Boulevard and the Specific Plan has been conducted and noise mitigation measures identified. Attenuation will be provided concurrent with construction. Truck traffic in residential areas will be controlled. Improvements to Leucadia Boulevard west of the Specific Plan area will be inconsistent with the land use planning policy to include noise mitigation measures in the design of new roadway projects (Policy 1.6). There will be certain residential lots along the Leucadia Boulevard improvement section with outdoor areas where noise levels will exceed acceptable levels. Many lots have driveways directly connecting to Leucadia Boulevard leaving space that is unmitigable. In addition, the height of noise attenuation walls at eight feet where mitigation can be achieved may not be aesthetically acceptable. In these locations walls no higher than six feet will only provide partial mitigation. 4.8.3 MITIGATION MEASURES Certain identified Specific Plan inconsistencies with General Plan policies can be rectified by amending the General Plan. For the Land Use Element the changes are as follows: POLICY 8.2: Development within coastal and floodplain areas identified in the Land Use and Resource Management Elements must be limited, designed to minimize hazards associated with development in these areas, and to preserve area resources. No development shall occur in the 100 -year floodplain that is not consistent and compatible with the associated flood hazard. Only uses which are safe and compatible with periodic flooding and inundation shall be considered, such as stables, plant nurseries, a minimum intrusion of open parking, some forms of agriculture, and open space preservation, as appropriate under zoning, and subject to applicable environmental review and consistency with other policies of this Plan. No grading or fill activity other than the minimum necessary to accommodate those uses found safe and compatible shall be allowed. Such grading shall not significantly redirect or impede flood flows or require floodway modifications. Exceptions from these limitations may be made to allow [begin changes] the Minimum private development (defined as one dwelling unit per legal parcel under residential zoning, and an equivalent extent of development under non - residential zoning) only upon a finding that strict application thereof would preclude a minimum use of the property. be made ter b Development of circulation element roads, other necessary public facilities, flood control projects where no feasible method for protecting existing public or private structures exists and where such protection is necessary for public safety or to protect existing development, and other development which has as its objective the imp_ovement of fish and wildlife habitat. c X,tad .revnfgs�raba;on v #::thy :flv�daJan':zn pviouly �iegrade�l areas prri�ied '.t. : s detrYn xied b the ;£its that the 4 -126 These exceptions shall be allowed only to the extent that no other feasible alternatives exist and minimum disruption to the natural floodplain environment is made. The City shall not approve subdivisions or property boundary line adjustments which would allow increased impacts for development in 100 -year floodplains. For specific policy provisions regarding wetlands which may be associated with floodplains, refer to Resource Management Element Policy 10.6. (Coastal Act/30253) POLICY 8.8: The properties located in the City's Sphere of Influence west of E1 Camino Real shall be designated as a Specific Plan area, except for the lands west of Saxony Road designated as Open Space /Parks, and lands in the southeast corner of the upper mesa beyond the Ecke holdings designated Residential 2 -3 units per acre. Development will be allowed within the specific plan area only through prior approval of the entire specific plan as described below: - The specific plan shall include: [begin changes] An Agriculture land use category. shall L designated fer - - south f the T .. ead a Dl d- eetenst-en en the Upper ffiesery density residential (Q-3 OX -S units per acre) .::...:::... :. : . . A mixed land usetttgCxy of commercial, office professional, met ca3 t 'm .institutional, and /or residential east _f the epper may be allowed. T development-petential fee the speeigie p"n area shall daily trips (ABT's)- - All development and other activities provided for by the specific plan shall conform to the following: Areas shown as reserve for agriculture /open space shall be a minimum of 40 contiguous acres in size. Land reserved €er agrieeitaraj and epee spaee she!! be pemanently pretested fee seeh aee by an eafereeabl e restEietlea _a; .._ .•.theE _ _ [end changes] 4 -127 For the Circulation Element there are two options to change Policy 2.23, changes in Goal 5 with two options for related policies regarding Leucadia Boulevard, and modifications to element text as follows: POLICY 2.23 [option 1]: No roadway link established by the Plan shall be re- classified to a greater capacity category and no new link shall be added without the affirmative vote of a majority of those voting in an election to approve such change. [begin changes] [end changes] POLICY 2.23 [option 2]: No roadway link established by the Plan shall be re- classified to a greater capacity category and no new link shall be added without the affirmative vote of a majority of those voting in an election to approve such change. In addition, Leucadia Boulevard between I -5 and E1 Camino Real shall not be changed above a major classification with an 85 foot right of way width [begin changes] defined ih Goal o-€ this Eleinefit [end changes] without prior consideration by the Leucadia Community Advisory Board. GOAL 5: Leucadia Boulevard between I -5 and Olivenhain Road is planned as a major arterial [begin changes] augmented:' with an 85 feet L-ight e€-;: y Prior to any improvements of th "is link above capacity (at LOS "D ") of a two -lane local roadway, all of the following policies shall be satisfied: Policy 5.1: The specific plan required by the Land Use Element for the unincorporated sphere area through which the Leucadia Boulevard alignment passes shall be adopted by the City. Policy 5.2: The annexation of the sphere area to the City of Encinitas shall have been accomplished. Policy 5.3: Full design and improvement plans for the length of Leucadia Boulevard between I -5 and Olivenhain Road shall be a scenic roadwa w wag.: de dB�aned b�I.Cw,i completed and adopted by the City, subject to the following. [option 11 The Gity sha11 €eFm the Lemeadia Sealevard Task FeEee te- be- eempesed- epeeldeate e€ Aeaead €a, The Task F +ail!-- paEtle €pate with Gity eta €€ In eeveleping des' ga standards ier Leueadia- Seelev�ard east of 1 5s Gensiderat -sa of elmment s by r New Eneinitas I i be eensidered in the design e€ the aeFtheaet 11ME a € Leweadia 89,alevaEdr [option 2] The she!! €erm the Leaeadia Sealer *ard Task Feree `e be eempesed- e€- residents e€ Seaeadlas The Task Feee etaadaEds ter Leaeadia- Sealevave east e€ 1 S. 6ensteei�a�e�t dents e€ -New Eireinibas will be eensideEed in the design e€ the nertheast line BE beeeadia See=e.arel-r- B Design may 41. l,;;include full landscape /street -scape design, bicycle and pedestrian facilities, recreational trails �rierc appropriate, and intersection improvements Ificl'txi ng legit &nd rgRtnrg ana�emen „ts where destEed Where 4 -128 facilities cannot be accommodated within the right -of -way, additional easementstr.xght...b v+tay may be required. ............... The design of the Leucadia Boulevard extension wall ffict include bvead landscaped medians and /or parkways which will .....:.:.....:. may be integrated with pedestrian facilities. Da, such as earth berms, vegetation, broad parkways and other landscape features w l2- swery —be provided to protect adjacent land uses from undesirable effects of traffic, noise, pollution, and light along Leucadia Boulevard. E The extension of Leucadia Boulevard across the bluff facing Green Valley shall be aligned and developed so as to minimize grading impacts to the bluff along Green Valley. Wildlife corridors across the alignment of Leucadia Boulevard at the Green Valley bluff and elsewhere as warranted shall be provided to facilitate wildlife passage and provide continuous areas of habitat. The connection of Leucadia Boulevard to Olivenhain Road shall bridge over Encinitas Creek rather than use pipes or culverts to minimize impacts to the drainage area. aw With street design, detailed noise impact analysis shall be provided to identify where noise walls or other attenuation measures may be required. Such analysis shall assume ultimate "build -out" traffic volumes. The installation of noise walls /other measures shall be provided prior to or in conjunction with street improvement.. why dppD3x'dte and feasible;. ........................ ......................... ........................ Where it is necessary or desirable to construct retaining or noise attenuation walls along the Leucadia Boulevard corridor, they shall be constructed with natural appearing materials and generously landscaped with vines, trees, and shrubbery, reflecting local community character. The design and improvement of Leucadia Boulevard may be considered as a two stage project: Stage I being a two lane highway and Stage II providing additional lanes and improvements as needed to accommodate ultimate projected traffic. R A maximum and improved. visual mitig+ of four through - travel lanes shall be designed The additional right -of -way for physical or I A high priority shall be given to implement these standards in areas where 126 feet of right -of -way presently exists. F No truck routes shall be permitted along Leucadia Boulevard from I -5 to Sidonia Street. 1V The City will consider purchasing any land within the right -of -way when it is offered for sale along Leucadia Boulevard from I -5 to Sidonia Street. [end changes] The following is a text change to page C -26 of the Circulation Element relating to Leucadia Boulevard: 4 -129 The roadway network described in Figure 2 focuses on a number of major improvements with regard to the roadway system in the City. The following improvements are provided for in the Circulation Element: Improve east -west movement in the northern portion of the Planning Area by designating La Costa Avenue as a major roadway (usually 4 travel lanes). Improve east -west circulation in the northern portion of the planning area by extending Leucadia Boulevard eastward as a scenic major [begin changes] augmented roadway to provide a connection between I -5 and El Camino Real. [end changes] Changes to the Circulation Element Circulation Plan, or Figure 2 (page C -19), are as follows: Leucadia Boulevard between I -5 and E1 Camino Real from a Major Roadway to a Major Roadway - Augmented. Via Cantebria between Garden View Road and Leucadia Boulevard from a Major Roadway to a Collector Roadway - Augmented. Garden View Road between E1 Camino Real and Via Cantebria relocated north of the post office site. Via Cantebria extension between Levante Street and La Costa Avenue in Calsbad deleted. For the Noise Element the changes are as follows: Policy 1.6 : Include noise mitigation measures in the design of new roadway projects [begin changes] wher a $pp Op tet aria -aaS b1.e. end changes] ...... . . . The remaining inconsistencies will not be rectified by amending the General Plan. As a result, impacts related to general plan consistency will be significant and unmitigable. Consistency can only be achieved through redesign of the Specific Plan. A redesign would need to be particularly responsive to policies regarding encroachment of steep slopes and sensitive habitat. This redesign is discussed in the following section entitled Alternatives to the Proposed Action. 4.9 AGRICULTURE 4.9.1 EXISTING CONDITIONS Climate and Water Climate Climates of San Diego County and their agricultural relationships have been described by Close (1970). The north coastal region is subjected to a mild, oceanic influenced weather system. Temperatures are moderate as indicated by Encinitas records of seasonal extremes with a low of 29 degrees Fahrenheit and a high of 107 degrees fahrenheit. The seasonal mean is 60.8 degrees Fahrenheit. Total seasonal heating degree days are on the order of 1952. Rainfall is light with an average season in Encinitas totaling 16.15 inches. This precipitation is variable and concentrated in the November to April season. Winds are predominantly from the west, light to moderate in velocity, and typically increase in the afternoon. The annual value of actual evapotranspiration is reported at around 10 to 14 inches. Evaporation loss averages less than 50 inches, mostly between May and October. Relative humidity averages from 50 to 70% during the fall and winter, "2 *111 and from 60 to 80% during the summer. A ground inversion condition may occur at night under clear skies from late fall through early spring. Air temperature close to the ground can consequently drop below freezing, resulting in damage to frost sensitive plants. Cold air drainage occurs in the canyons during the same season with similar effects. The north coastal region is divided into the maritime and coastal areaclimates. The maritime occupies a long, narrow belt along the ocean as well as penetrates canyons and valleys open to the beach. This areaclimate is constantly dominated by ocean conditions, including narrow and seasonal temperature changes, high humidities, and summer fog. The coastal areaclimate lies inland from the shoreline strip for 10 to 30 miles. Ocean influence diminishes with increased elevation and distance inland. Diurnal and seasonal temperatures and humidity fluctuations increase while summer fog decreases. The western extension of the upper mesa is within the maritime areaclimate. The balance of the project area lies within the coastal areaclimate. However, Green Valley experiences a strong maritime influence as well as cold air drainage. Water Surface runoff and groundwater supplies in the north coast region are insufficient to support the agricultural sector. The demand is met with water imported by the Metropolitan Water District of Southern California (MWD). MWD wholesales this water to the County Water Authority (CWA) which in turn serves member subregional agencies. As detailed in a following subsection entitled Public Services, most of the project area is in the San Dieguito Water District (SDWD) with portions around the perimeter in the Olivenhain Municipal Water District (OMWD). Although SDWD recognizes that there will probably be a transition from agricultural use to urban use of the area over time, the District intends to size its water system to accommodate future agriculture use and assumes ultimate demand reflecting that use. In addition, the San Elijo Joint Powers Authority (SEJPA) plans to provide reclaimed water to the project area and surroundings in the near future with reclamation facilities to operate at the capacity necessary to meet demands. Surface runoff in the area is currently conserved by capturing it in two storage reservoirs on the property. Irrigation runoff from greenhouses is also collected in these lagoons. The reservoirs are hydraulically connected with a sump and pump station, and piping installed to greenhouses and fields to provide a supplemental or emergency supply of water. Topography and Soils Topography Topography of the project area is representative of moderately dissected portions of the north San Diego coastal plain. Physiographic conditions are described in detail in a previous subsection entitled Topographic Alteration and Visual Quality. Prominent surface features include a large relatively flat mesa, a steep rugged inland bluff along its eastern edge, and the broad relatively flat Green Valley below. The mesa is cut in the northwest by narrow, fairly steep finger canyons and bisected in the south by an open canyon. The steep slopes of the bluff and finger canyons control the size and shape of agriculturally useful land. Greenhouses and open fields are confined to the mesa top, finger canyon ridge tops, open canyon bottom, and Green Valley floor with steep rugged barriers between. Soils A soil survey of San Diego County soils has been conducted by Bowman (1973). Soils along the north coast belong almost entirely to the Marina - Chesterton (9) association. Soils of the eastern coastal plain are mostly in the Diablo -Las Flores (29) association, or belong to the Las F lore s -Huerhuero (30) association. Coastal lagoon valleys and their tributary valleys and canyons are in the 4 -131 Salinas - Corralitos (6) association. Marina - Chesterton soils account for approximately 44,098 acres (2%) of the 2,204,880 acre County and are used for truck crops, flowers, citrus, and avocados. Salinas- Corralitos soils account for about 22,049 acres (1 %) and are used mostly for flowers and truck crops with a wide variety of flowers and vegetables grown under intensive management. Soils of the Diablo -Las Flores and Las Flores - Huerhuero associations are used mostly for range, with irrigated truck crops grown on a limited basis. Soil series found in the project area are in the Marina - Chesterton and Salinas - Corralitos associations, with the former on the mesa and the latter in Green Valley. Soil series within these associations are shown on Figure 4 -31 with their suitability for farming described in Table 4 -11. Capability unit and storie index definitions are provided in Tables 4 -12 and 4 -13. Capability classifications are used by the USDA Soil Conservation Service to group soils according to their suitability for crops. Prime soils as defined by the Land Conservation Act of 1965 (Williamson Act) are soils that are in capability classes I and II, or have a Storie Index Rating 80 -100 (Grade 1). There are about 26,698 acres of Class I and 104,933 acres of Class II soils in San Diego County. The Storie Index expresses numerically the relative degree of suitability, or value of a soil for intensive agriculture based on soils characteristics. Crop suitability is the suitability of soils for five major crops in the county. A soil rated fair or good in terms of crop suitability for any one of the five crops is considered agricultural land. Cotton /Beland /Associates and Westec Services (1987) report that the Encinitas area contains very few exposures of prime agricultural soils under the Class I and II definition. These soils are mostly located in Indian Head canyon, and on the valley floor along Escondido Creek from Olivenhain to San Elijo Lagoon. There is an abundance of Class III and IV soils rated fair to good for the five major crops, particularly tomatoes and flowers. These soils are found primarily near the coast and in major drainages. According to PRC Toups (1980) there are also very few prime soils in Carlsbad. Only Class II soils are represented, located between Agua Hedionda and Batiquitos Lagoons. Class III and IV soils account for about 60 percent of the area. Distribution and areal extent of arable soils within the project area are primarily determined by underlying geologic formations and topography. The bluff and northern finger canyons are steep and made up of sandstone. Soils in these locations (RuG,TeF,AtF,Lsf) are in Classes VI and VIII, with severe limitations generally precluding commercial crop cultivation. Arable soils are concentrated on the upper mesa and in Green Valley and are relatively uniform as to capability unit and crop suitability. Most of the soils in these locations are in Classes III and IV with severe, and very severe limitations reducing the choice of crops and /or requiring special conservation practices or very careful management. Of these soils there are roughly 541 acres on slopes with gradients of 10 percent or less. This total excludes the developed YMCA /Sports Park property. There are no Class I soils and only about 5 -10 acres of Class II soils (SbC) located in the bottoms of the northern most finger canyons in the northwest sector. As to Storie Index Rating grades, the dominant soils of the upper mesa (CbB,CbC,CfD2) are in Grade 4 and are severely limited for crops and require special management. Soils in Green Valley (CsB,CsC,CsD) are in Grades 2 and 3, which are suitable for most crops or special crops but require special management. Grade 1, which has few or no limitations restricting use for crops, is not represented in the project area. In terms of suitability for major crops, the dominant soils on the mesa top and soils in Green Valley are considered fair or good for flowers and poorly suited, fair, or good for truck crops and tomatoes. Past and Present Crops A summary of past agricultural activity in the project area as reported by Calkins (1993) follows. Except for rainfall and marginal wells, much of the land was without water until the late 1930•s. The area was primarily dry farmed with 4 -132 `W M y% U Ql O f4 a C C fl 1.1 b W LI O W r♦ A b 41 to r♦ -4 O W rl ri I d' W rd A Id H y Y N Y Y Y Y Y Y Y L Y L Y L N L t L L L r- L C L L L CC L z J r L IL O J J J J J J J Vf N V) J J J J IU Ip ITO O O O O O O O O O O O O O O O O in 1 d V1 V1 V1 V1 V1 V1 V1 M M M M V1 Vl M ST M 1 Y C M I M I M 1 M M I M I M M I M I M I M I M I M I M I I M C M N M M M M O O M M O M CO N M M M M �� M M M M M M M M M y N yp p L I pQ p .L $ I L 1 O O 1 O 8 0 1 go O J :% W ci c� � N qu L L L L I 1 I O Y I I 1 1 1 I 1 I LL I I I 1 I I I E u1O. u10. tm 0 Y v J J v u W L �° L ja .n ILO .0 .0 L V I IL LO M g L 1 1 ^ 1 8 1 L I 1 L a .L LL a I a I 1 W I LL I a s Im rn 41 0 o 0 0 0 z z z z z L L+ N L L L L L L ' r Y I I m 1 I 1 1 1 I O 10 C1 LL u10. W 0 C7 C7 W u N W a u .O 0 P O M r O Ln �T N of j — cm 'o M — M M r N N N r M M N �u 1O V� N Ln �T " 1� Y C N H o� r O� OT O, O, 01 J v r v CO CO v — v v v -T S v N v N I N d I I V1 1 I CO CO M M M 1 N I N I N C N 1 QI N H C! N 1 C% I QI I V 1 d •H ~ lv � Cl H ry ' C C H i 1� U N O i4 a c m c O J-I 4 f.l U m N A 4J r.. 41 ..j .•i A ro a ro U to .a •.I O N r-i I 4 N r-I .Q ro E0 O% v W C W W r r W W Q J J J 0. a C a C a o a a a a C J J pp W W Y Y Y Y Y L O W W 1 W 1 Y Y Y y N C O y 0 to U) N W W 7 W W to (a m p U U W u E pU O O O 0 2v u v tC n L O 0 N O > > r Y J Y U y L 7 O y N y Y 41 f- -9 u x W v Y a 8 � a c X a, m W Y � 7 O O 4p7 O p O 'p y •� 4) w L L L L L L y 7 L 7 W L N N N $- L L U O 0 > J E w - > L t > E 0 Y L c +' C L O C O C O cc O J H W O y J W C y N W 0. ' > J y y y 9 41 W O O r •p O 0 o 0 O 42 4 W O L- L y W W W IO N 0 W O L O O O O T > >1 4 Of T O O C O O O O OI 7 O O 'y O 7 7 .O y yr O O Q O O O 1� O O O L L- ar v u 4) o o o o Q Q s o Iy0 N O O O O T O O I N O 0 y W O O �I L N Y � L L t w N N V y VY L T T \ \ \ \ y y y Y 41 CO CO CO L a a a W g- O O y 41 41 +, U) W W W y u u > CL > > > O U N O O O O O O L L y L y Y Y +' y L y y 7 U U d u 41 U d U CD 4/ C U c 47 C u V v U u u u f E J O E •� . W A a Q' Q' 4E 4 41 4u 7 U 0 0 Y p Y O Y O 4 W c c Q p u W u t 47 W 47 W V r L 4) W 41 W O a U L U L U L U L OI Oi �% V rL CL 1Cp C E C E C E W W •V u C U Or u U •7 J 0 u u U I •O 7 7 7 7 7 0 O O •r W 014, CD 41 01 Y 01 M U> C W C W C W C W d7 ` L L L O O E E E E EO Lt 1p W W C C E O p 7 W 7 �7 7 N 7 N y U y V N u C C Y Y u u V L C -0 y y y y C O 4) c c c � c O O O IEO U L L U L 0 L u L L L 47 EW C U Y 4) Y 4) Y W> y y r Q v y N y y W> W> Y �' ..7i r M C J C J C J C �-' O 01 U O O Y W O W •O W •O • •W F E c w W 4) W L. ' Y 4) 4, Y U 4J U Y U L Y Y L a a J L 0 W u W W W u W Y Y 40 y .W C C E E O Or L > L L c Q > Y J Y J 41 41 W L 0 •L 47 •L 47 •L 47 L y L y L Y1 L L r L Y Y H y N W N d N 7 d 7 •r Y Y Y 7 L L L M > > E E E y y y N 0 C w e 0 C 47 7 41 7 J U J J {> w L. Vl L (A L. V) L V) L. > W > W > W N U H r GZDD P C .. .> Ol N 40 r r fi N N M J r I % w O w O; te w w w > > V 4 -135 O% v Table 4 -13 Soils Storie Index Descriptions for San Diego County Index Rating Grade I Suitability for General Intensive Agriculture 80 to 100 1 Few or no limitations restricting use for crops. 60 to 80 2 Suitable for most crops; few special management needs; minor Limitations narrowing choice of crops. 40 to 60 3 Suited to a few or special crops; requires special management. 20 to 40 4 Severel y limited for crops; requires careful management. 10 to 20 5 Not suited to cultivated crops; can be used for pasture and range. 0 to 10 6 Not suited to farming. Source: Bowman (1973) beans and other tolerable crops. Cattle were grazed in Green Valley and on the upper mesa until the middle 1960's. These activities utilized about 80 percent of the acreage presently in production. Beginning in the early 1920's portions of the property were within a water district and flower growing commenced with acquisition of certain parcels by Paul Ecke, Sr. In 1963 the Ecke poinsettia operation was converted from open fields to greenhouses. Most of the greenhouses, located just east of Saxony Road, were built between 1963 and 1972. The Ecke holdings overall were acquired as various parcels over a 50 year period. During this time up to 15 homes were scattered throughout the area. In the late 1970's the crop mix for the Ecke holdings was similar to what it is today. Flowers were the major crop and no vegetables or ornamental trees such as palms were gr_,,wn. By 1989 a substantial portion of the general floral area was converted from field activities to container nursery products, dominated by color products. From 1970 to 1989, 20 acres were added to greenhouses and 10 acres to propagation (field stock growing) areas. In addition, 25 acres of uncultivated land were brought into production for field crops. A major crop addition in the early 1970's was about 40 acres of Birds of Paradise. These flowering plants, located in the northern sector will reach the end of their productive life in the early 1990'x. Approximately 30 acres of decorative Eucalyptus were planted after 1970 and continue to be productive. However, this crop is being abandoned. Present crops and other agricultural uses for the project area are listed in Table 4 -14. Total gross area for agricultural activities and related uses on the Ecke Encinitas Ranch holdings is approximately 748 acres. About 550 gross acres are in crop production. There are some 36 acres of greenhouses and shadehouses located near Saxony Road and about 515 acres of open field crops on the upper mesa and in Green Valley. Nursery products and flower crops are the dominant crop category with 425 acres devoted to their production. Poinsettias are notable because Ecke is world renown for propagation of new varieties of this flower. In terms of areal extent, field flowers cover the most ground at 380 acres. Vegetable crops are second in extent of area with 125 acres in production. Of the total gross acreage about 20 percent, or 150 acres are given up to roads, buildings, and other supporting operations such as storage areas. Approximately 16 acres of the Thornton property is used for flower production in greenhouses. The crop mix favors five acres of roses and five acres of snapdragons along with other flower varieties. 4 -136 Table 4 -14 Agricultural Crop Acreage and Other Uses in Project Area A ^mot....... "t Trot =1 a fnr 1993 2 Includes stock, Baby's Breath, Sunflowers, Mini - Carnations, Iris, and miscellaneous. 3 Approximately 20% in roads, buildings, and supporting operations. Includes Roses, Gladiolus, Aster, Snapdragons, and Alstroemeria. Nursery Products and Flower crops, and Vegetable Crops 1991 -1993 Acres Eltem/Category 1993 Acres 1 1991 Acres Crop Acres Location Encinitas Ranch Open Field Vegetables 125 Green Valle open Field Nursery and Bedding Plants 20 North Mesa Open Field floral [total] [3603 Roses Decorative Eucalyptus 20 Quail Hollow East Birds of Paradise 40 North /South Mesa Poinsettia Stock 40 Quail Hollow East Others 260 West Saxon Greenhouse Pot Plants and Poinsettia Propagation 25 East Saxon Greenhouse Pot Plants and Cut Flowers 15 Sidonia East Shadehouse Finished Pot Plants 5 Sidonia East Roses 5 North Mesa Subtotal 550 11 Other uses [totaL3 [1983 16 Rodeo /Horse Stables 8 Green Valley Ponds and Pastures 40 South Mesa /Saxony Open Space 150 Overall Total2 758 Thornton Property Greenhouse Cut FLowers3 16 Mesa To Project Total 1 774 2 Includes stock, Baby's Breath, Sunflowers, Mini - Carnations, Iris, and miscellaneous. 3 Approximately 20% in roads, buildings, and supporting operations. Includes Roses, Gladiolus, Aster, Snapdragons, and Alstroemeria. Nursery Products and Flower crops, and Vegetable Crops 1991 -1993 Acres Eltem/Category 1993 Acres 1 1991 Acres Encinitas Ranch Ornamental Trees and Shrubs 5 5 Bulbs, Corms, Rhizomes, Roots, & Tubers 0 125 Carnations 5 5 Roses 2 2 Leptos erum 5 5 Poinsettias) 20 20 Poinsettias and Others Propagation 27 27 Other flowers 361 331 Vegetable Crops 125 30 Total 550 550 Thornton Property Roses 5 5 Other FLowers1 11 11 Total 16 16 Project Total 566 1 566 1 Grown in greenhouses, all others grown in open fields. Sources: Calkins (1993); Rischman (1993) 4 -137 Regulations Additional discussion of the definitional and public policy framework relating to agricultural land and its conversion to other uses by Geyer Associates (1994) , labeled Appendix I, is included with other technical appendices to this document. General Plan Designations and Zoning Classifications The Specific Plan area is designated [SP] Specific Plan on the Encinitas General Plan Program Land Use Policy Map (City of Encinitas, 1989) and classified [SP] on the Encinitas Zoning Map (City of Encinitas, 1989). There is an underlying designation of Residential [0.51 -1.00 Units /Acre] for the extreme western portion. The Thornton property is designated Residential [2.01 -3.00 Units /Acre]. Corresponding zone classifications for these designations are SP, RR -1, and R -3 respectively. General Plan goals and policies provide a framework for development of the specific plan area which retains agricultural use under an Agricultural /open Space designation for land on the upper mesa south of the Leucadia Boulevard extension. In the Encinitas General Plan the importance of agriculture to the City is recognized and maintenance of agricultural activities as well as preservation of prime agricultural lands within its sphere of influence is encouraged. "Prime" agricultural lands are defined as land in the sphere of influence in the coastal zone presently producing or having the potential to produce commercial agricultural products and with Class I -IV soils. The Ecke holdings are identified as "prime" and designated for long -term preservation as "Agricultural /Open Space Preserve." No other land in the City or its spheres of influence is similarly designated. Approximately 341.1 acres would be expected to be designated for long -term agricultural use under the basic framework for development of the specific plan area established by the General Plan. With the exception of the Carter property, the Specific Plan area including the extreme western portion, as well as the Thornton and Leaf properies are presently designated [AC] Agricultural Cropland [SPA 2.8] on the San Diego County San Dieguito Community Planning Area Map (Mapping Section, 1990). The Carter property is designated 24 Impact Sensitive [1 Dwelling Unit /4,8, and 20 Acres]. The primary corresponding zone classification for the properties is 5 -88 with Special Area Regulations "A" and "R" designators. The Carter property is classified 5 -90 with Special Area Regulations "R" and "F" designators. The 5 -88 classification allows certain uses, and after adoption of a specific plan, any use allowed by that plan. The 5 -90 classification is a holding area with permitted uses similar to 5 -88. Special Area Regulations designator "A" pertains to Agricultural Preserve. Designators "R" and "F" pertain to Coastal Resource Protection Area and Flood Plain respectively. The San Dieguito Community Plan (Planning Department, 1987), and County of San Diego Local Coastal Program (LCP) San Dieguito Land Use Plan (Planning Department, 1984) also provide a framework for development of the specific plan area. At least one -half of the land suitable for agricultural use must be reserved for such use and located on the upper mesa. Agricultural suitability is defined as land with Class I -IV soils on slopes under 10 percent, either currently in agricultural production or having the potential for agricultural production of food crops. "Prime Agriculture" is defined by the LCP as land in the coastal zone presently producing, or with the potential to produce commercial food products. These lands are given the [AC] Agricultural Cropland designation for long -term preservation. Although the specific plan area is the only land in San Dieguito with an AC designation, there is a small area designated [20] Agricultural Preserves [1 DU /8 Acres] along Escondido Creek near Elfin Forest. Approximately 259.9 acres would be expected to be designated for long -term agricultural use under the basic framework for development of the specific plan area established by the Community Plan and LCP. 4 -138 Both the Carlsbad General Plan Land Use Map (Planning Department, 1991) and Carlsbad Land Use Plan, Local Coastal Program (City of Carlsbad, 1985) include measures to protect and preserve agriculture in the coastal zone. The General Plan includes a [NRR] Non - Residential Reserve designation with the intent to provide for interim agricultural use until ultimate land use character is established. These areas carry zone classifications of Exclusive Agricultural [EA] and Limited Control [LC]. The Carlsbad Local Coastal Program (LCP), also referred to as Mello I and Mello II, defines "Agricultural Land" as Class I -IV soils and establishes a Coastal Agricultural Overlay Zone [CAOZ] for areas designated as "Coastal Agriculture." The zone encourages agricultural use of suitable land, recognizes and provides programs for conversion of some 1081 acres to urban use, and identifies mitigation measures. Designated lands can be converted if equivalent acreage of agricultural land is preserved in the statewide coastal zone, or continued or renewed agricultural use is not feasible, or a mitigation fee is paid. The mitigation fee is used for purchase of agricultural land or agricultural and other coastal resource improvements in Carlsbad. Conversion of a portion of an approximate 535 acre holding north of Palomar Airport Road east of I -5 would be permitted through a master plan if the conversion provides supplementary uses that assist in retention of the balance in agricultural use. Ordinances and Statutes Agricultural Preserve Area Regulations Much of the project area is currently in a County of San Diego Agricultural Preserve identified as Ecke Agricultural Preserve No.l (Mapping Section, 1990). The preserve was established by resolution of the County Board of Supervisors in January of 1969, with boundaries as shown on Figure 4 -32. San Diego County Zoning Ordinance Agricultural Preserve Area Regulations (San Diego County Zoning Ordinance Section 5100) aid in the implementation of the California Land Conservation Act of 1965 (Williamson Act). The Act is intended to encourage the preservation of productive agricultural lands. An Agricultural Preserve Designator "A" is applied to those lands in the County which are subject to agricultural use regulations and which have been designated as being within an agricultural preserve in accordance with the Act. Restrictions on uses are divided into two categories. The first category pertains to lands subject to a Land Conservation Act contract. Uses are restricted to those as set forth in the contract. The second category of restrictions on uses pertains to lands not under contract. Uses are as set forth in the applicable use regulations except that all uses subject to a minor use permit or a major use permit shall be approved only if a finding is made that the use complies with the Act and is compatible with agricultural use. Specifically, no use permit shall be granted unless the following required findings are made: State Statute: The proposed use complies with all provisions of the California Land Conservation Act of 1965. Compatibility with Agricultural Use: The proposed use would not be incompatible with the continued agricultural use of any land within the agricultural preserve. This determination shall include a consideration of the following: possible increase in vandalism; possible damage from pets; possibility that use will lead to restrictions on agricultural spraying, noise or smell; and possible interference with the movement of farm machinery or agricultural products. An agreement (contract) for the Ecke Encinitas Ranch holdings was entered into at the time the Ecke Preserve was established. In addition, the resolution and contract were immediately amended as to eminent domain, minimum parcel size, and uses. In 1982 the resolution was again amended changing the parcel sizes and 4 -139 uses. Permitted uses and acreage restrictions listed in the amended resolution are as follows: Uses: All uses permitted by right or civic use types allowed by major use permit in applicable zoning; a scenic highway corridor; a wildlife habitat area; a saltpond; a managed wetland area; and a submerged area. Parcel Sizes: No dwelling, guest house, farm employee housing, or farm labor camp on any premises containing an area less than the following minimums: grazing (80 ac) , dry farming (40 ac) , cattle and horse breeding (40 ac), poultry (10 ac), dairies (20 ac) , tree crops (10 ac), truck crops (10 ac), and flowers (10 ac). Agricultural agreement status of individual parcels within the 796.71 acre Ecke No.l Preserve is provided in Table 4 -15. For parcels within the Specific Plan area only the 4.32 acre Hinsvark property in Green Valley has no contract. As of November 1993, notices of nonrenewal had been filed for approximately 401.46 acres of the 732.24 Ecke holdings in the Specific Plan area. Consequently, the contract for these parcels will expire in either the years 2001 or 2002. The parcels are located on the north upper mesa and in Green Valley. A notice of non - renewal was filed in December of 1993 for active agreements covering the balance of 330.78 acres located on the south upper mesa, bluff along Green Valley, and east of Saxony Road. The contract for these parcels will expire in 2003. For other parcels of the project area in the preserve, a notice of nonrenewal has been filed for the Thornton property with the contract expiring in 1993. This property is located adjacent and to the southeast of the Specific Plan area. Active agreements cover the 15 acre YMCA /Sports Park properties which are developed as civic uses. These properties are adjacent and to the southwest of the Specific Plan area. There is also an active agreement for the 2.48 acre Leaf property located to the northeast of the terminus of Quail Gardens Drive. Finally, there is an active agreement for the 2.66 acre Olivenhain Water District property which is an island, not a part of the Specific Plan on the north upper mesa. Williamson Act The California Land Conservation Act of 1965, or Williamson Act, is based on numerous State legislative findings. Several are of particular interest. One is that the preservation of agricultural land is necessary to the conservation of the state's economic resources and for the assurance of adequate, healthful and nutritious food for future residents of this state and nation. Another important finding is that the discouragement of premature and unnecessary conversion of agricultural land to urban uses is a matter of public interest in that it will discourage discontinuous urban development patterns which unnecessarily increase the costs of community services to community residents. An additional interesting finding is that in a rapidly urbanizing society agricultural lands have a definite public value as open space. Finally, land within a scenic highway corridor or wildlife habitat area has a value to the state because of its scenic beauty and its location adjacent to or within view of a scenic highway, or because it is of great importance as habitat for wildlife and contributes to the preservation or enhancement thereof. There are a number of pertinent definitions of the Act. "Agricultural use" means use of land for the purpose of producing an agricultural commodity for commercial purposes. An "agricultural commodity" is any and all plant and animal products produced for commercial purposes. "Prime agricultural land" is SCS Class I or II soils, or soils with a Storie Index Rating 80 -100; land planted with fruit or nut bearing trees, vines, bushes, or crops which have a non - bearing period of less than five years and which will normally return during the bearing period an annual unprocessed commercial value of $200 or more per acre; or land which has 4 -140 Table 4 -15 Ecke Agricultural Preserve No-1 Williamson Act Agreements Status Ownership I Assessors l Parcel Encinitas Ranch 256- 172 -05 256- 172 -06 256- 330 -36 256- 330-41 257 - 020-01 257 - 020 -02 255 - 011 -07 257 - 040-24 255 -011 -06 257 - 010 -37 257 - 030 -28 257 - 010-36 257 - 040-01 257 - 040-04 257 - 040 -17 257- 040-30 257- 040-31 257 - 040-32 257 - 040 -33 254- 200 -35 254 - 201 -06 255- 020-12 255 - 020-33 255 - 020-34 254 - 200-04 254 - 200-36 257 - 010-01 257 - 010-34 254 - 200-34 256- 330 -18 256- 330-19 256- 330-23 256- 330-40 Subtotal Acres Agreement Status 18.23 Active (expires Dec 2003) 1.69 Active (expires Dec 2003) 1.10 Active (expires Dec 2003) 39.39 Active (expires Dec 2003) 37.97 Active (expires Dec 2003) 39.53 Active (expires Dec 2003) 8.01 Active (expires Dec 2003) 5.95 Active (expires Dec 2003) 30.13 Active (expires Dec 2003) 33.14 Active (expires Dec 2003) 77.35 Active (expires Dec 2003) 31.53 Active (expires Dec 2003) 6.76 Active (expires Dec 2003) 22.13 Expires Jan 2001 8.75 Expires Jan 2001 5.80 Ex ires Jan 2001 21.43 Expires Jan 2001 10.00 Expires Jan 2001 10.00 Expires Jan 2001 10.25 Expires Jan 2001 57.70 Expires Jan 2002 41.08 Expires Jan 2002 19.40 Expires Jan 2001 12.89 Expires Jan 2001 8.66 Expires Jan 2001 23.62 Expires Jan 2001 0.05 Expires Jan 2002 37.76 Expires Jan 2002 19.71 Expires Jan 2002 59.55 Expires Jan 2002 20.83 Expires Jan 2002 1.0 Expires Jan 2001 0.75 Expires Jan 2001 4.52 Expires Jan 2001 5.58 1 Expires Jan 2001 732.24 4 -142 Ownership Assessors Parcel Acres Agreement Status Leaf1 257- 011 -15 2.48 Active Hinsvark 255 - 020-04 4.32 No Agreement Unknown (YMCA)l 256- 340-30 3.88 Active /Permitted Civic Use YMCA1 256- 340-11 1.65 Active /Permitted Civic Use 256- 340-29 9.48 Active /Permitted Civic Use Thorntonl 257- 030-45 30.00 Expires 1993 257 - 030-46 4.00 Expires 1993 257 - 030-19 6.00 Expires 1993 Olivenhain Munici,:1 Water District 254- 201 -07 2.66 Active /Public Utility Subtotal 64.47 Preserve Total 796.71 1 Not in Specific Plan area but in annexation area. Sources: Calkins (1993); San Diego County Assessors Maps (1993) 4 -143 returned an unprocessed plant product commercial value of $200 or more per acre for three of the previous five years. "Agricultural preserve" means an area devoted to either agricultural use, recreational use, open space use, or any combination of such uses. "Compatible use" is any use determined by the county or city administrating the preserve to be compatible with the agricultural, recreational, or open space use of land within the preserve and subject to contract. A "scenic highway corridor" is defined as an area adjacent to, and within view of, the right -of -way of a state or county scenic highway. A "wildlife habitat area" is land or water area designated by a county or city, after consultation with State Fish and Game, as an area of great importance for the protection or enhancement of the wildlife resources of the state. "Open space use" is the use or maintenance of land in such a manner as to preserve its natural characteristics, beauty, or openness for the benefit and enjoyment of the public, to provide essential habitat for wildlife if such land is within a scenic highway corridor, wildlife habitat area, saltpond, managed wetland, or submerged area. "Recreational use" is the use of land by the public for walking, hiking, picnicking, camping, swimming, boating, fishing, hunting, or other outdoor games or sports for which facilities are provided for public participation. The Act allows counties and cities to establish agricultural preserves. The preserves define boundaries of areas within the county or city which are willing to enter into contracts pursuant to the Act. Agricultural land includes by definition recreational uses, scenic highway corridors, wildlife habitat, saltponds, managed wetlands, and submerged areas. The preserve may contain land other than agricultural land, but the use of any land in the preserve and not under contract must be restricted by zoning or other suitable means in such a way as not to be incompatible with agricultural use of the land. The county or city must also adopt rules governing the administration of the preserves. Counties or cities may by contract limit the use of agricultural land for the purposes of preserving such land. Lands to be put under contract must be located within a designated preserve and devoted to agricultural or other defined use such as wildlife habitat. The contract must provide for the exclusion of uses other than agricultural, and other than those compatible with agricultural uses for the duration of the contract and shall be binding upon all successors in interest of the owner. The contract must be for an initial term of no less than 10 years with a year added automatically to the initial term on the anniversary date unless notice of nonrenewal is given. If the land owner, county or city desires in any year not to renew the contract, that party must serve written notice of nonrenewal of the contract upon the other party in advance of the renewal date of the contract. Upon notice of intent not to renew the contract, the existing contract remains in effect for the balance of the period remaining since the original execution or last renewal. The parties may, upon their mutual agreement rescind a contract in order simultaneously to enter into a new contract pursuant to the Act. The initial term of the new contract would be at least as long as the unexpired term of the contract being rescinded. The parties may also, upon their mutual agreement rescind a contract in order simultaneously to enter into an open -space agreement pursuant to the Open -Space Easement Act with an initial term of not less than 10 years. A landowner may petition the administering local government to cancel (immediately terminate) a contract. The local government may give tentative approval to a cancellation only if it finds the cancellation to be either consistent with the Act or in the public interest. Consistency with the Act depends on a number of considerations including service of a notice of nonrenewal; that cancellation is not likely to result in removal of adjacent lands from agriculture; that the alternate use is consistent with the general plan; that cancellation will not result in discontinuous patterns of urban development; and that there is no proximate noncontracted land which is available 4 -144 and suitable for the alternate use or that development of the contracted land would provide more contiguous urban development than development of proximate noncontracted land. Finding in the public interest depends on considerations that other public concerns substantially outweigh the objectives of the Act; and there is no proximate noncontracted land which is available and suitable for the alternate use or that development of the contracted land would provide more contiguous urban development than development of proximate noncontracted land. Prior to cancellation the City must also determine a cancellation fee to be paid by the landowner as deferred taxes upon cancellation. The uneconomic character of the existing use cannot in itself be sufficient reason for cancellation of the contract. The uneconomic character of the existing use may be considered only if there is no other reasonable or comparable agricultural use to which the land may be put. Analysis of the effects of a proposed cancellation to make the required findings normally involves evaluating the change in timing of conversion to other uses rather than the underlying conversion itself, which would be directly authorized by the applicable general plan and zoning restrictions and any other permit requirements. Prior to tentative cancellation the City or County shall determine a cancellation fee to be paid by the landowner as deferred taxes upon cancellation. That fee shall be an amount equal to 12.5 percent of the cancellation valuation of the property. Following tentative cancellation, final cancellation may be granted by the local government upon payment of the cancellation fee (to State General Fund) and receipt by the landowner of all approvals necessary to implement other uses on the property. The original cancellation fee must be recalculated it is not paid within one year of the tentative cancellation. If a determination is made at the time of tentative cancellation concerning permits for other uses, final cancellation will ordinarily be a ministerial act. An agricultural preserve continues in full effect following 'annexation, detachment, incorporation or disincorporation of land within the preserve. Any city or county acquiring jurisdiction over land in a preserve through annexation or other method assumes the rights and responsibilities specified in the Act. Economic Viability In an inventory of agriculture in the San Dieguito coastal zone Spellman (1979) reports 1490 acres in 1979 devoted to a variety of cut and potted flowers, truck and specialty crops, and limited marketable oranges and avocados. The floral industry was the primary form of agriculture with greenhouses covering the largest portion of land and bringing the highest return of income per acre. About 500 acres of greenhouses were found in nine groupings in the area. Group 7, including some Ecke land holdings was the largest grouping with 336 acres. Field flowers were also profitably grown on approximately 745 acres of the total 990 acres of field agriculture in the area. Of this total, 379 acres or approximately 55 percent of the regions field flowers were grown on the Ecke land holdings. Some truck crops were grown in Green Valley, including 100 acres on Ecke holdings, with citrus and avocados in other urbanized areas. Kubota (1978) provides information on the past production characteristics in the late 1970's in the north county metropolitan subregion of San Diego. This region contributed just over 16 percent, or 12,909 acres to the total acreage under production with the most successful crops including avocados, tomatoes, strawberries, squash, bedding plants and gladiolus. The industry was integrated with the grower also the shipper and marketer of the crop. With few exceptions, growers did not own the land they worked. PRC Toups (1980) notes that as of 1979 crops in Carlsbad consisted of primarily field flowers and a variety of vegetables. Pole tomatoes on some 2600 acres were the most predominant with strawberries gaining production strength. 4 -145 Cotton/ Beland /Associates and Westec Services (1987) report that as of 1986 nearly 12 percent, or 1538 acres of the 13,196 acre Encinitas area was under some form of agricultural use, most of which involved growing and production of cut flowers. Almost half of this acreage, some 723 acres, was located in the unincorporated northern half of the area within the Ecke land holdings. Other communities with substantial agricultural acreage were Leucadia with 281 acres, Cardiff by the Sea with 247 acres, and Old Encinitas with 174 acres. SANDAL (1988) provides a higher 1986 total for agricultural use in Encinitas and its sphere at 2739 acres. By crop grouping, orchards and vineyards accounted for 34 acres while intensive agriculture and field crops amounted to 1300 and 1405 acres respectively. There was 7649 acres of vacant and undeveloped land in the City and sphere at this time. For Carlsbad and its sphere in 1986, SANDAG (1988) finds 7173 acres devoted to agriculture. Of these, five acres were in orchards and 509 acres were in intensive agriculture while 5645 acres were in field crops and 1014 acres devoted to special agriculture. There was a total of 19,315 acres of vacant and undeveloped land in the Carlsbad area. Upon comparing 1976 and 1992 agricultural maps of Carlsbad, Letsch (1992) has found both a decrease in total acreage and a disaggregation of farmland in the City. The County of San Diego Department of Agriculture (1991) reports that the most recent documented total gross value of agricultural crops in the County reached over one billion dollars. A summary of 1990 and 1991 crop acreage and value and a ten year comparison for 1991 and 1981 is provided in Table 4 -16. Nursery and flower products were the number one category for both 1990 and 1991 reaching a total of 7197 acres with a production value of over 522 million dollars. 1991 earnings for the category were about $72,600 per acre. There has been an increase in both acreage and value over this two year period. During the last decade nursery and flower products has expanded by 4587 acres and increased in value by over 428 million dollars. Vegetable crops was fourth in 1991 with 9382 acres valued at a little over 79 million dollars. 1991 earnings were about $8400 per acre. This category declined in both acreage and value between 1981 and 1991. Acreage, sales, and value for nursery products and market flowers for 1990 and 1991 are broken down by individual item in Table 4 -17. Indoor decoratives were the highest value item in 1991 at $197,874,200 from 432 acres. This item represented nearly 38 percent of the total County value for nursery products and market flowers. The item was produced on just six percent of the total acres in nursery and flower production. Poinsettias accounted for $5,968,479 produced on 51 acres in 1991. This represented one percent of the nursery and flowers crops total value from less than one percent of the total acreage. The "all other" item of combined flower types had a 1991 total value of $88,643,569 from 1700 acres. This was nearly 16 percent of the total value from almost 23 percent of the total acreage. According to Kubota (1978) the characteristics of each areaclimate in a given region dictate the type of agricultural production in that zone. Crop profitability is affected by areaclimate in terms of yield, quality, overall cost, and market timing. Vegetable crops, cut flowers, bulbs, and bedding plants are strongly associated with the maritime and coastal areaclimates. Greenhouse operations are also well represented in both areaclimates. Soil resources of the north coastal plain are considered marginal, particularly where slopes and mesas occur. Soils tend to be shallow and of low fertility with major activities focused on vegetable crops, cut flowers, and greenhouses. The price of water is as critical as its availability. Finally, the costs of labor, energy, and pesticides have a great effect on the viability of agriculture. Angus McDonald and Associates (1981) have summarized the conclusions of various late 1970's studies of agriculture in the north coastal region with two statements. One is that it is difficult in the long -term to expect agriculture to continue on land that has a market value substantially above its value for agricultural production. The other is that in addition to land values, 4 -146 O O U O .I..I A C ro -.1 r-1 ro b ro ro Gl U 4 04 O 4 U rq ro 4 0 J-> .-1 U 4 �D r-1 I d' N ro E4 ri Q• ON C ro 0 01 ri 4 O W m .-I to O H 4 O ON w 4J ro U r-1 co O� r-1 'C3 ro ri 01 Q1 .-1 4 O W C O m •.1 4 (a a S O U 4 to a) >4 R W E-1 H M 1 r M 0�0 ti O O C n Ln 00 N ONO JM an OO M O N� N ti 2 N a N N to H �t > C), N H H h H fn H H H H H H In 1 I ti I 1 10 C �t N L r f� In fn N O` L N N M It 10 r N v d x I In I to a a , 1 1 1 NO I I a V) ^ cm a Ln a I N O, 10 d U .Mt 0 O � L a M �t a Ln M 1 M 00 1 O M ti r O O � N 000 O r �t In 10 0� N O 00 O cN W 10 It in N O � N T N M M p 00 � Vii V0� 7 r N ' r ti r N H H r _ > M N H H O 07 > to H 49 N H H H O H H r H r H M M co r M 1 P 1 I I N O r T f� s O 1 O• perp.. co- N f� M O N Ol O� 10 N M .O /0 u N u ar v x x a r 1 ONO I 1 1 I 8 r ^ CM M ol a L cu to O ti O/ L V Q N O r r A r a r a O v CL a O u L a, u � a o u L d a � W o T T � L CL L CL O N a+ L u O a a O 9L a O W u O > > �+ a 7 ♦+ m O v s v a O Z W u W a a 4J 0 CL a u 'O C u L- a 0 7 u m O W O u a CL a Y J Y CL O L Ll T L C 10 u O d u O M u _ 2 M F 1V J > J LL Q N ; r-1 co O� r-1 'C3 ro ri 01 Q1 .-1 4 O W C O m •.1 4 (a a S O U 4 to a) >4 R W E-1 4 -147 f'•I rn rn �i N 4 4) .i O U -4 4 w O C Ir 4 to a a) A N U 4 O H O O O O O O O O 2 N a N r H > P O H M H r N H H H 1 H In 1 I ti I 1 ol C �t N L r f� In fn N 10 r M O v x I N I I I `O ^ cm a Ln a N d .Mt 0 O L M �t a A M N QQ M �t 00 0� N O 00 O cN Ln 10 It in Is O M N f- M N p P, � 7 M M 00 H P N WN _ N Lrz n N - 07 > to -- M H H H H O H H r H r M ol co 1 T 1 s I 1 r O) T r f� O Ol N M /0 N u v x I r N M a ~ cu ol O/ L N O r A r Q CL O u a u L d � o CL C m C O > > to u d s a 41 a a 4J 0 7 C M 7 'O C O L V C 0 7 u L Z W u 1p a CL O Y J Y CL O L T L C 10 u O d u O L u IL _ Ol M V Y a N ; J L 7 > tm > N CL N M J Q N 1O •• 4 -147 f'•I rn rn �i N 4 4) .i O U -4 4 w O C Ir 4 to a a) A N U 4 O Table 4 -17 Nurse�rryo- Products an Market Flowers Category Year Production Quanity Sold Units Value Item Acres Hectares 89 523,246 Plants $10,511,104 Citrus & Subtropical 1991 221 237 96 564,813 Plants $10,931,220 Fruit Trees 1990 759 40,410,680 Plants $96,904,115 Ornamental Trees & Shrubs 1991 1,875 716 31,587,000 Plants $94,044,242 1990 1,770 -- $68,510,400 Bedding Plants & Turf 1991 525 212 167 -- $56,957,921 1990 412 -- $3,261,577 Herbaceous Perennials 1991 50 20 20 -- $2,490,100 1990 50 -- $13,096,188 Cactus & Succlents 1991 171 69 69 -- $13,335,069 1990 171 1991 400 162 48,027,034 Bulbs $2,902,840 $3,142,960 Bulbs, Corms, Rhizomes, 1990 450 182 54,372,414 Bulbs Roots, & Tubers -- $12,090,070 1991 141 57 — $11,646,238 Carnations 1990 132 53 1991 61 25 26,571,836 Blooms $8,306,511 $6,464,200 Roses 1990 61 P5 21 ,461,010 Blooms 1991 40 162 2,712,000 Blooms $3,253,600 Proteas 1990 400 162 2,000,000 Looms Bl ,241,032 1991 250 101 802,500 Bunches $1,539,250 $668,916 Leptospermum 1990 250 81 2�008 Bunches 1991 600 243 2,648,400 Bunches $5,641,092 $2,428,878 Wax flowers 1990 P50 101 944,390 Bunches -- $4,012,750 Christmas Trees 1991 320 130 130 -- $3,916,950 1990 320 -- $197,874,200 Indoor Decoratives 199 1 432 175 173 -- $195,224,800 1991 428 51 21 1,616,292 Units $5,968,479 Poinsettias 1991 -_ -- 1990 -- __ $88,643,569 All Other 1991 1,700 688 728 __ 587,860,790 1990 1,800 __ $522,515,745 Total 1991 7,197 2,913 -- $491,353,316 1990 6,681 2,704 Source: Department of Agriculture (1991) 4 -148 agriculture suffers operational conflicts with surrounding urban uses. Goldman (1979) and Strong (1979) have developed models for estimating the economic consequences of converting agricultural land to urban uses. These models are based on sales, income, and employment. Where small percentages of agricultural land are taken out of production most indirect impacts fall on sectors outside agriculture and since these sectors have diverse clienteles, conversion has little or no effect. However,' if large percentages of land are taken out of production there can be a noticeable decline in associated businesses. As to the major factors which impact the future of agriculture, Letsch (1992) notes numerous changes since the late 19701s. First is the trend toward smaller farms throughout San Diego County. Between 1982 and 1987 the total acres harvested dropped nearly 3000 acres while the total number of farms increased by 79. The Count•Y has over 4000 farms smaller than 10 acres in size compared to 1000 farms wh_ch are larger. The floral industry has a highly developed infrastructure which can care for, harvest, and market crops from small parcels. However, where a high degree of mechanism is required, such as for vegetable crops like tomatoes, parcel size becomes a constraint on production. The second change is in water availability and cost. Although the recent drought is considered over, the four previous consecutive years of below normal rainfall and resulting water use prohibitions by MWD and member agencies are indicative of the precarious nature of the statewide water supply. The average cost of water to farmers in San Diego County has risen from $67 per acre foot in 1970 to $494 per acre foot in 1992. Agricultural rebates, which buffered water costs for farmers during substantial rate increases, were discontinued in 1991 and are not e:<pected to be reinstated. Although reclaimed water may be available to farmers In the future, its amount and cost is uncertain. Third in the changes is urbanization. In response to urban growth and limited availability of undeveloped land in the coastal region, land values have increased substantially. As a result, coastal farmers have retired, or moved to locations where land values are less and purchase and lease costs are reduced. As urbanization has closed in on agricultural lands conflicts have intensified. New residents allege excessive dust, noise, odors, and pesticide use. In turn, farmers complain of theft, vandalism, and crop damage from urban air pollution. The fourth and fifth changes are labor cost and the regulatory environment. Agricultural labor costs have increased directly in payroll expenses and indirectly in training costs. Type and use of pesticides and fertilizers has become more strictly controlled by governmental agencies. The number and type of forms, and record keeping requirements has increased. In addition, OSHA requirements for health and safety programs have become more stringent. Sixth in the changes is competition. Historically, San Diego County farmers have had a competitive edge because of climatic conditions allowing crops to be brought to maturity at times when these crops were not ready for harvest in other locations. The cultivation of new locales with similar climate conditions such as central coastal California and Mexico coupled with lower production costs in these areas has all but eliminated that edge. The last change in factors affecting the future of agriculture is the trend toward higher crop values. Increasing production and competitive pressures over the last decade have resulted in a trend toward higher value crops such as flower and nursery crops to earn more income per acre of farmland. Based on previous evaluations and changes in circumstances, Letsch finds agriculture in San Diego County to be a dynamic industry which exists in an environment of changing markets, urbanization, rising production costs, and difficult competition. Its future depends to a large extent on the ability of farmers to maintain their niche, or carve out a new one, in markets for higher value crops, while at the same time maintaining maximum flexibility of crops to meet rapidly changing market conditions. 4 -149 4.9.2 ENVIRONMENTAL EFFECTS Agricultural impacts are significant if substantial existing or potential productive land is irreversibly retired, if there is non - compliance with statutes and regulations, if continued agricultural operations are seriously hindered in various ways, and if there are existing or introduced conflicts between agriculture and other surrounding uses. For Land Use Plan A, 134.1 acres are designated and classified for on -going and future agricultural use. For Land Use Plan B, 126.0 acres are designated and classified for agricultural use. In addition, clearly compatible wildlife and recreational uses in the form of 93 acres of natural open space and 83 acres of golf course in the plan area will be adjacent to these agricultural areas. The Specific Plan Zoning Ordinance provides for continued interim agricultural use by right for lands within the Specific Plan area designated and classified for other uses except open space. Reclaimed water will be available for agricultural operations into the future. Significant effects associated with conflicts between agricultural and urban uses could occur described as follows. Loss of Productive Land Implementation of non - agricultural land uses involving grading, construction of structures, paving and other permanent improvements usually constitutes an irretrievable commitment of soil resources to such uses. Placement of land in permanent open space also eliminates soils from agricultural use. An approximate total of 10 acres of Class II prime soils will be lost to agriculture through open space designation for both Land Use Plans A and B. This represents a 0.01% (< 1 %) decrease in the total 131,631 acres of Class I and II prime soils in San Diego County and is not considered significant. Because the loss is so small it is also not significant from the north coastal region perspective. Further, removal of these prime soils from potential production does not make agricultural use of other locations in or surrounding the project area infeasible. For Land Use Plan A and the Thornton property an approximate total of 407 acres of Class III and Iv soils of the total 66,147 acres of Marina - Chesterton and Salinas- Corralitos associations on the coastal plains will be committed to urban uses. For Land Use Plan B and Thornton about 415 acres will be eliminated from agricultural use. In both cases this represents a 0.06% (> 1 %) loss of these productive association soils and is not considered significant. In addition, removal of these soils from potential production does not make agricultural use of other locations in or surrounding the project area infeasible. For both Land Use Plans A and B large tracts totaling 134.1 or 126.0 acres of productive soils will remain available and designated for agricultural purposes. In addition, productive soils in locations designated for other uses except open space will be available for continued agricultural use into the future while the Specific Plan is implemented in phases. Further, golf course use is as soil dependent as agricultural use and may not be irretrievably lost. Regional Economy Implementation of non - agricultural land uses will result in losses of agricultural crop acreage and value in the north coastal region and San Diego County at large. There will also be an internal shift in crop mix on land remaining in production, and related gains and losses in acreage and value. The reduction in Encinitas Ranch crop acreage with Land Use Plan A will be 415.9 acres, or a 0.24% decrease in the total 172,790 acres in production in San Diego County. With Land Use Plan B the reduction will be 424.0 acres, or 0.25 %. The Thornton property accounts for an additional reduction of 16 acres, or 0.01 %. The resulting total will be 431.9 acres, or 0.25% with Land Use Plan A and 440.0, or 0.26% with Land Use Plan B. These acreage reductions are all less than one percent and not considered significant. 4 -150 Related loss in revenue by crop category is estimated using 1991 values on a per acre basis. For vegetable crops the acreage reduction is restricted to Encinitas Ranch and will be 125 acres with both Land Use Plans A and B. At $8447 per acre the loss will be $1,055,813, or 1.33% reduction in both the total 9382 acres and $79,255,084 value. For nursery products and flower crops the reduction for Encinitas Ranch with Land Use Plan A will be 290.9 acres and with Land Use Plan B, 299.0 acres. At $72,602 per acre the losses will be $21,119,921 and $21,707,998 respectively. This represents 4.04% and 4.15% losses in the County $522,515,745 total value. Retirement of the 16 acres on the Thornton property amount to an additional loss of $1,161,632. The resulting total will be $22,281,533, or 4.26% with Land Use Plan A and $22,869,630, or 4.37% for Land Use Plan B. These losses in revenue are all under five percent. For the entire agricultural sector the combined crop category total losses for Encinitas Ranch amount to $22,175,734 with Land Use Plan A and $22,763,811 with Land Use Plan B. This represents 2.18% and 2.23% losses respectively of the $1,016,507,123 total County value. Adding the Thornton property raises losses to $23,337,346 with Land Use Plan A and $23,925,443 with Land Use Plan B. Respective percentage reductions in the County total value will be 2.29 and 2.35, both less than five percent. At buildout of the Specific Plan there will be 134.1 acres in agricultural production with Land Use Plan A and 126.0 acres with Land Use Plan B. The future crop mix will be roughly 100 acres of poinsettia propagation and pot plant production and 26 to 34 acres of poinsettia blooming production. The increase in blooming production acreage of 14 acres for Land Use Plan A and six acres for Land Use Plan B will result in gains in the nursery and flower category value. Based on production of 31,692 units per acre at a value of $3.69 per unit, the gain will be $1,637,209 with Land Use Plan A and $701,661 with Land Use Plan B. It is noted that poinsettia propagation is not specifically included in County agricultural statistics. In past years propagation was reported as acreage in nursery crops without a dollar value. Unreported 1991 value of poinsettia propagation for Encinitas Ranch was about nine million. Future gain with Land Use Plans A and B from 100 acres is projected at about 25 million. The net gain will be some 16 million. When factoring in poinsettia propagation, gains will nearly offset losses for the nursery products and market flowers. Gains for Encinitas Ranch with Land Use Plan A will be $21,119,921 and with Land Use Plan B, $21,707,998 reducing losses to $3,482,712 and $5,006,337 respectively. Against the total loss with Thornton the offset will be slightly less at $4,644,327 and $6,167,969 for Land Use Plans A and B. Percentage losses of the category revenue are reduced accordingly with Land Use Plan A at 0.89 and Land Use Plan B at 1.18. These offset losses are at one percent or less and not considered significant. In consideration of the entire agricultural sector, the offset Encinitas Ranch losses will be $4,538,525 with Land Use Plan A and $6,062,150 with Land Use Plan B. Against the total including Thornton, the losses will be $5,700,137 and $7,223,782 respectively. Percentage losses of the total revenue are 0.56 with Land Use Plan A and 0.71 with Land Use Plan B. The offset losses are all less than one percent and not considered significant. The estimated agricultural acreage remaining in production in accordance with the Specific Plan Phasing Plan is listed in Table 4 -18. With the exception of Green Valley it is assumed that in each phase only the phase area is affected. This is because following completion of Phase 1 any of the other phases could be implemented out of order. Consequently, the cumulative retirement of land from production other than the total at buildout is not provided. Phase 2B development in the south end of Green Valley will require completion of roads in Phases lA and 1B and result in termination of all agricultural production in this location. As phased development occurs agricultural production will continue but be gradually reduced in acreage and change in crop mix over a period of many years. 4 -151 Table 4 -18 Estimated Agricultural Acreage Remaining in Production in Project Area Nursery Products and Flower Crops, and Vegetable Crops Item /Category Land Use Plan A Land Use Plan B Phase Acres Phase Acres Ornamental Trees and Shrubs 1A 2B 1B 2C 1C 2D 5.0 1A 2A 1B 2B 1C 2C 5.0 2A 0.0 2A 0.0 Bulbs, Corms, Rhizomes, Roots, & Tubers All Phases 0.0 All Phases 0.0 Carnations) 1A 2A 1B 2C 1C 2D 5.0 1A 1B 2A 1C 2D 5.0 2B 0.0 2B 2C 0.0 Roses) 1A 2A 1B 2B 1C 2C 2.0 1A 2A 1B 2B 1C 2C 2.0 2D 0.0 2D 0.0 Leptosperum 1A 1B 2C 1C 2D 5.0 1A 1B 1C 2D 5.0 2A 2.5 2A 2.5 2B 0.0 2B 2C 0.0 Poinsettias) 1A 1B 2A 1C 2D 20.0 1A 1B 2A 1C 2D 20.0 2B 2C 30.0 2B 2C 30.0 Poinsettias and Others Propagation 1A 1B 2A 1C 2D 27.0 1A 1B 2A 1C 2D 27.0 2B 2C 104.0 2B 2C 96.0 Other Flowers 1A 1B 2C 361.0 1A 1B 361.0 1C 346.0 1C 346.0 2A 261.0 2A 261.0 2B 144.0 2B 272.0 2D 291.0 2C 281.0 -- -- 2D 291.0 Vegetable Crops 1A 65.0 1A 65.0 1B 50.0 1B 50.0 1C 125.0 1C 125.0 2A 2C 2D 125.0 2A 2C 2D 125.0 2B 0.0 2B 0.0 Total Buildout 134.1 Buildout 126.0 1 Grown in greenhouses, all others grown in open fields. Source: Calkins (1993) 4 -152 There will be a gradual retirement of vegetable crops and nursery products and flower crops other than poinsettias. During this time poinsettia production will increase to buildout totals. Losses in revenue will be incremental over a considerable period of time as well as counterbalanced by gains as the crop mix changes. Regulatory Compliance General Plan Designations and Zoning Classifications Encinitas General Plan consistency is discussed in detail in the preceding subsection entitled General Plan Consistency. The Specific Plan designates and classifies less acreage for agricultural use than the 341.1 acres expected under the framework established for the specific plan area by the General Plan. For Land Use Plan A there will be 167.70 fewer agricultural acres, while for Land Use Plan B there will be 215.1 less acres. This represents 49 and 63 percent reductions in previously anticipated agricultural land in the Specific Plan area. The Specific Plan also designates and classifies less than the 259.9 acres anticipated under the framework established by the San Dieguito Community Plan and LCP. Based on the foregoing analysis, the conversion of agricultural land with the Specific Plan has been determined not to be significant in the context of existing farmland, intensified production on land designated for agricultural use, and continued agricultural activity throughout the Specific Plan area as an interim use. Further, the most economically viable form of agriculture will be focused and encouraged. Less than 50% of the agricultural land will be converted to development other than open space, recreation, and public improvements such as schools and roads. Agriculturally designated land will be on the mesa, topographically separated from existing and future urban development. Finally, golf course and open space designated lands will serve as a buffer between agricultural activities and urban uses. Agricultural Preserve Area Regulations In accordance with provisions of the Williamson Act, the Ecke Agricultural Preserve contracts will remain in full effect following annexation to the City of Encinitas. The City will assume the rights and responsibilities of the Act. At that time the City may need to take a number of actions relative to these responsibilities, including the adoption of an ordinance or resolution formally establishing a Williamson Act program in the City, as well as rules under which preserves and contracts will be administered, allowable uses, and provisions for contract cancellation. The Encinitas Ranch Zoning Ordinance regulations pertaining to agriculture will replace the County Agricultural Preserve Area Regulations. Under the Ordinance agricultural uses are permitted in all zones except Open Space, subject to regulations of the Agricultural Zone. The Agricultural Zone is applied to Specific Plan areas designated for agricultural use. Permitted uses include, but are not limited to agriculture, arboriculture, and floriculture operations, and supporting facilities. Certain other activities are allowed subject to a major or minor use permit such as farm employee housing and retail nurseries. Williamson Act As mentioned above, the Ecke Agricultural Preserve will remain in full effect and under the jurisdiction of the City of Encinitas upon annexation. It is expected that the boundaries of the preserve will progressively change over time to reflect implementation of the Specific Plan. Eventually, the preserve will be reduced to the parcels within the Specific Plan agricultural designation and classification and any outlying parcels with active contracts. Although notice of non - renewal has been filed for all lands to facilitate timely phased implementation of designated land uses other than agriculture in the Specific Plan under Land Use Plans A and B, it is anticipated that new contracts will be 4 -153 entered into for agriculturally designated lands when Land Use Plan A or B is selected. It is noted that it may be possible to retain the open space bluffs along Green Valley and golf course lands in the preserve because of their proximity to designated agricultural areas and the agricultural preserve definition which includes open space and recreational uses. Maximum retirement of Ecke Encinitas Ranch holdings in the preserve will be 598.14 acres or 75 percent of the preserve for Land Use Plan A and 606.24 acres or 76 percent for Land Use Plan B. If open space land remains in the preserve the loss will be reduced by about 93.2 acres to 63 percent for Land Use Plan A and 64 for Land Use Plan B. Retirement of the Thornton property will reduce the preserve by 40 acres or five percent. Together the maximum loss to the preserve will be 80 percent for Land Use Plan A and 81 percent for Land Use Plan B. If open space is retained the reduction will be less at 68 and 69 percent respectively. Although the reduction in preserve size will be considerable, it will not jeopardize continued agricultural production on the remaining parcels. The areal extent of the preserve at buildout reflected in both Land Use Plans A and B is based on needs for successful continued poinsettia production into the future. Parcels under agreement cannot be converted to other uses until notice of nonrenewal is filed and the contracts expire or are cancelled. The Thornton property contract expires in 1993. According to the Specific Plan Phasing Plan, contracts for parcels within the Specific Plan area other than east of Saxony and in Green Valley will expire prior to plan implementation. For parcels east of Saxony it is expected that a notice of nonrenewal will be given when the selection between Land Use Plans A and B is made. Implementation will then occur upon contract expiration 10 years later or earlier with cancellation of the contract. If the Specific Plan Phasing Plan remains on its anticipated schedule the contract for parcels in Green Valley will have to be cancelled. The landowner must initiate a petition for cancellation in accordance with the Act. The City must then make the required findings of consistency with the Act and public interest. Information presented in this section, in the preceding subsections entitled Land Use Compatibility and General Plan Consistency, and in the following section entitled Alternatives to the Proposed Action may be relied upon for this decision, conflicts From the agricultural perspective conflicts with urban uses arise from vandalism, pet damage, restrictions of spraying, noise or smell, excessive night lighting, and interference with machinery or other movement. From the urban uses standpoint these conflicts are essentially reversed where agriculture results in overspraying, noise and smell, dust, and machinery activity. At buildout of the Specific Plan there will be 134.1 acres in agricultural production with Land Use Plan A and 126.0 acres with Land Use Plan B. The future crop mix will be roughly 100 acres of poinsettia propagation and pot plant production and 26 to 34 acres of poinsettia blooming production. Activities will mostly take place in greenhouses with some cultivation of environmentally controlled open fields. For Land Use Plan A the agricultural operation will be located on the south upper mesa. Adjacent land uses will be the golf course to the northwest and north, open space bluff and a street (Via Cantebria) to the east, and residential to the southwest. No serious conflicts will arise between agriculture and the golf course or open space uses. Possible serious conflicts could occur between the existing Rosebay Drive neighborhood to the south, as well as future single family dwellings on the Thornton property to the south and future single family dwellings to the southwest. The agricultural operation will be mostly contained in greenhouses, virtually eliminating accidental overspraying, noise, smell, and dust. Nontoxic environmental controls will be favored over conventional fertilizers, herbicides, 4 -154 and pesticides in both greenhouses and on open fields. Open fields will be small and machinery activity low. In addition, except at the Thornton property a slope bank will separate the residential areas from agricultural• land above. In turn, the operations will be relatively secure from vandals and domestic animals. Activities will be concentrated on a contiguous block of land eliminating interference with machinery and night lighting from surrounding uses will be minimal. However, real or perceived conflicts might reach significant levels if agricultural operations extend to common boundaries with residential lots. For Land Use Plan B the agricultural operation will be located on the south upper mesa and east Saxony area. For the south mesa location adjacent land uses to the north will be single family residential and an elementary school to the north across a street (Streets A and B) . There will also be a street to the east (Via Cantebria). Tnere will be community uses adjacent to the west. Ti existing Rosebay Drive residential neighborhood is adjacent to the south. In the future there will also be residential use on the Thornton property to the south. For the east Saxony area, there will be single family residences to the north, and a hospital (San Luis Rey) and botanical garden (Quail Gardens) to the south. There will be community uses to the east and mixed uses across Saxony Road to the west. As with Land Use Plan A, the agricultural operation will be primarily contained in greenhouses, nontoxic environmental controls will be favored, open fields will be small, and machinery activity low. The south mesa area will be separated from residential and school uses to north by a street. Except at the Thornton property slope banks will separate the residential areas to the south and community uses to the west from agricultural land above. The east Saxony area will be separated from mixed uses to the west by a street (Saxony Road). In turn, the operations will be relatively secure from vandals and domestic animals. Activities will take place on two large blocks of land minimizing interference with machinery. Although night lighting from surrounding uses will be greater in the east Saxony area it will not interfere with production. However, real or perceived conflicts might reach significant levels if agricultural operations extend to common boundaries with community uses to the east. Phasing and the Specific Plan Zoning Ordinance which permits agricultural use in any zone are intended to promote planned, orderly, efficient development while encouraging on -going agricultural activities. Agricultural production will continue in Specific Plan locations designated for other u s until the respective phases are implemented. Conflicts could arise betwet. agricultural and urban uses during phased implementation where new residential neighborhoods share common boundaries with on -going agricultural operations. However, any conflicts will be short -term and not expected to seriously hinder agricultural activities or force premature termination of operations. It is expected that necessary public utilities and services for phased development will be extended from previously developed locations and not in themselves cause retirement of agricultural lands or result in discontinuous patterns of development. 4.9.3 MITIGATION MEASURES Specific Plan General Planning Standards require a landscape buffer along perimeters of Specific Plan areas designated and classified for agricultural use to separate activities from adjacent urban uses. For Land Use Plan A, the buffer will be in the South Mesa planning area between the agricultural lance and existing and future residential development to the south and southwest. For Land Use Plan B the buffer will be in the South Mesa and East Saxony planning areas. Standards for the buffer are as follows: Landscape Buffer Between Development and Agricultural Areas. Along the southern boundary of the South Mesa planning area where agricultural land abuts existing or planned residential areas, a twenty -five (25) foot wide minimum landscape buffer will contain a pedestrian path. A minimum five (5) foot high chain -link fence shall be erected between the agricultural area and the twenty -five 4 -155 (25) foot buffer zone to allow views but discourage human intrusion. Along the eastern boundary of the East Saxony planning area where agricultural uses abut community use a 10 foot landscape buffer will be provided. The above measure will reduce any conflicts between agricultural and urban uses to a level of insignificance. 4.10 TRAFFIC A traffic study of the Specific Plan has been conducted by Austin -Foust Associates (1993) . The study includes the transportation setting, Specific Plan traffic characteristics, impact analysis, phasing, and mitigation. A copy of the report, labeled Appendix F, is included with other technical appendices to this document. The following discussion is a summary of that report. 4.10.1 EXISTING CONDITIONS Current Transportation Setting The Specific Plan traffic analysis focuses on the northwest sector of the City of Encinitas and southern portions of the City of Carlsbad. Interstate 5 (I -5) serves as the principal regional access highway to and through the area with interchanges at La Costa Avenue, Leucadia Boulevard, Santa Fe Drive, Birmingham Drive, and Manchester Avenue. Locations for these roadways are shown on the previously presented Figure 2 -2. I -5 has four travel lanes in each direction. on the arterial system, main north /south roadways are Highway 101 and E1 Camino Real with four lanes and six lanes respectively for most segments. Secondary north /south travel is served by Rancho Santa Fe Road and Vulcan Avenue, each with two lanes. Main east /west roadways are La Costa Avenue with two lanes, and Encinitas Boulevard with four lanes. Santa Fe Drive provides a two lane route for secondary east /west travel. Current average daily traffic volumes (ADT) for the analysis area and surrounding circulation system are shown on Figure 4 -33. The YMCA /Sports Park and Leaf properties are developed and their traffic included in existing conditions. The current volumes represent particular roadway segment traffic as counted in December of 1992. The heaviest volumes occur on E1 Camino Real with 34,000 ADT south of Olivenhain Road and 39,000 ADT south of Mountain Vista Drive. There are also heavy volumes on Encinitas Boulevard with 39,000 ADT east of I -5 and 37,000 ADT east of Saxony Road, and on La Costa Avenue with 28,000 east of I -5. Moderate traffic volumes are posted on First Street (Highway 101) with up to 17,000 ADT south of Encinitas Boulevard, Leucadia Boulevard with 15,000 ADT west of I -5, and Olivenhain Road carrying up to 19,000 ADT near E1 Camino Real. Existing intersection locations are shown on Figure 4 -34 with intersection capacity utilization (ICU) values for relevant intersections listed in Table 4- 19. A level of service (LOS) scale is used to evaluate intersection performance. The levels range from LOS A representing free flow, to LOS F representing severe traffic congestion. For the City of Encinitas, an ICU of 0.90, which equates to LOS D, is the maximum acceptable value. Four intersections have ICU values greater than 0.90. At the I -5 interchange with La Costa Avenue the south bound ramps have a morning (AM) peak hour ICU of 0.93 while the north bound ramps have an AM peak hour ICU of 1.04 and an afternoon (PM) peak hour ICU of 0.95. There is also a PM peak hour ICU of 0.92 at the north bound ramps of the I -5 interchange with Encinitas Boulevard. Finally, the intersection of Saxony Road and La Costa Avenue has a PM peak hour ICU of 1.10. Future Transportation Setting at General Plan Buildout The planned roadway system at buildout of the Encinitas General Plan, or post year 2010, includes four pertinent yet to be built segments. The first segment is the extension of Leucadia Boulevard as a Major (four lane) Roadway from Sidonia Street to El Camino Real. The second segment is the extension of Via 4 -156 r 14 �O Zg LA �0srl 26 1 y� s � o N Lp 1c 10, O 15 W 19 15 oVVENHNN .W 10 Q 7 2 LEUCADIA W {` Y S m p C � r U U LA ,n IF ° N N 5� A ,FARDEN 4 n MOUNTAIN NStA 27 37 W z W a K O W =+ 27 26 i✓ r 0 39 ENCINI 3 5 { REOUEZA u J Lit \^ i W ° 12 15 14 1 14 SANTA V FE N .J ZG r LOA 3 A `6 a� 16 N 1 N > J 4 ° PACIFIC OCEAN ADT Volumes (0001s) Figure 4 -33 Existing Traffic Volumes Source: Austin -Foust Associates (1993) 4 -157 4 -158 Table 4 -19 Existing Intersection Capacity Utilization Summary Intersection AM PM Interstate 5 @ 3. South Bound Ramps & La Costa Avenue 0.931 0.78 4. North Bound Ramps & La Costa Avenue 1.041 0.951 10. South Bound Ramps & Leucadia Boulevard 0.46 0.55 11. North Bound Ramps & Leucadia Boulevard 0.48 0.77 22. South Bound Ramps & Encinitas Boulevard 0.79 0.80 23. North Bound Ramps & Encinitas Boulevard 0.63 0.921 Saxony Road 51 5. La Costa Avenue 0.87 1.101 12. Leucadia Boulevard 0.27 0.37 24. Encinitas Boulevard 0.56 0.82 QuaiL Gardens Drive a 25. Encinitas Boulevard 0.50 0.70 Balour Drive @ 26. Encinitas Boulevard 0.51 0.67 Via Cantebria @ 27. Encinitas Boulevard 0.52 0.66 EL Camino Real a 6. La Costa Avenue 0.80 0.69 13. oLivenhain Road 0.84 0.87 15. Garden View Road 0.52 0.63 16. Mountain Vista Drive 0.36 0.66 28. Encinitas Boulevard 0.55 0.87 Rancho Santa Fe Road a 7. La Costa Avenue 0.59 0.55 14. OLivenhain Road 0.50 0.44 1 Exceeds Level of Service (LOS) D. Level of service ranges: 0.00 - 0.60 0.61 - 0.70 0.71 - 0.80 0.81 - 0.90 0.91 - 1.00 1.01 + Source: Austin -Foust Associates (1993) 4 -159 Cantebria as a Major Roadway from its terminus near Via Marbrisa north of Encinitas Boulevard, north to the extended Leucadia Boulevard. The third segment is the extension of Garden View Road as a Collector (four lane) west from E1 Camino Real to the extended Via Cantebria. The fourth segment is the extension of Quail Gardens Drive as an Augmented Local Street from its terminus just north of Encinitas Boulevard to Quail Hollow Drive near Saxony Road. Certain improvements of existing roads to Circulation Plan classification standards will also occur. Among these are the widening of Leucadia Boulevard from two to four lanes (Major Roadway) from I -5 east to Sidonia Street. A number of committed interim year intersection improvements relevant to the Specific Plan area will also be implemented. Two of the improvements are additional lanes at the north bound and south bound ramps of the I -5 interchange with La Costa Avenue under the authority of Caltrans and the City of Carlsbad. Another improvement is additional dual left -turn lanes for all approaches at the intersection of El Camino Real with Encinitas Boulevard which are part of a City of Encinitas E1 Camino Real improvement project. There will also be an addition of a north bound thru -lane on El Camino Real near Woodley Road as a condition of development of the Home Depot home improvement center. Long -range (post year 2010) traffic volumes for the completed circulation system are shown on Figure 4 -35. These volumes are based on General Plan land uses including the Thornton property under its current residential land use designation and a projection for the Specific Plan area under the framework established in the General Plan. With the framework, the trip generation for the specific plan area would be 25,769 ADT with 1247 AM peak hour trips and 2211 PM peak hour trips. As is the case with existing conditions, the heaviest volumes occur on E1 Camino Real with 57,000 ADT south of Olivenhain Road, 58,000 ADT south of Garden View Road, and 56,000 ADT south of Mountain Vista Drive. Heavy volumes are also posted on Encinitas Boulevard with 42,000 ADT east of I -5 and 38,000 ADT east of Saxony Road, and on La Costa Avenue with 38,000 east of I -5. With extension of Leucadia Boulevard volumes are at 32,000 ADT east of I -5 and 35,000 ADT near E1 Camino Real. Olivenhain Road carries volumes ranging from 47,000 ADT near El Camino Real to 61,000 north of La Costa Avenue. Future intersections are shown on Figure 4 -36 with post 2010 ICU values for relevant intersections listed in Table 4 -20. Three intersections exceed a value of 0.90, or LOS D. All are along E1 Camino Real during the PM peak hour with the intersection at La Costa Avenue showing an ICU of 0.95, while at Calle Barcelona and Olivenhain Road ICU's are 0.93 and 1.09 respectively. Interim Year Transportation Setting Interim year ADT volumes are shown on Figure 4 -37 with corresponding interim year ICU values listed in Table 4 -21. This condition represents existing plus ambient growth at 10% in the analysis area up to about the year 2000 and provides a basis for evaluating phased effects of the Specific Plan prior to buildout. Three intersections exceed ICU 0.90, or LOS D. Among these are Saxony Road at La Costa with AM and PM peak hour ICU values of 0.95 and 1.20 respectively. AM and PM ICU values for E1 Camino Real at Olivenhain Road are 0.94 and 0.96. At the north bound ramps of the I -5 interchange with Encinitas Boulevard the PM peak hour ICU is 1.02. 4.10.2 ENVIRONMENTAL EFFECTS For this analysis traffic impacts are significant if an intersection capacity utilization (ICU) value of 0.90 (LOS D) is caused to be exceeded or there is a caused 0.01 (1%) or greater value deterioration in an already deficient condition (LOS E /LOS F). Implementation of the Specific Plan and Leucadia Boulevard improvements will result in the phased extension and connection of several important City circulation system roadways. However, there are a number of intersection deficiencies associated with the plan. 4 -160 LO rn 37 '' 14 3� LA �osT� 37 20 A A W a 8 S. O W CALLS BARCELONA o f 35 rn 26 g 35 47 OUN ENHAJN c�A a 16 32 28 CR LEUCADIA OD po Y � N � N N Z iD 4 Z N N m p GARDEN CP 6 +I 2 13 MOUNTAIN i 35 A a m K) 38 9 26 35 rp (r 42 ENCINI > y O 9 7 W z o M REOUEZA m v c) J ! A 0 = W W O g N �a 31 16 1 ?3 SANTA to FE G B4"IgOA O+ ap N s W r Ln l f ; Q OD W `6 13 17 W 12 a mA �7 �J PACIFIC OCEAN �s ADT Volumes (000's) Figure 4 -35 Long -Range Traffic Volumes Source: Austin -Foust Associates (1993) 4 -161 Figure 4 -36 Future Intersections Source: Austin -Foust Associates (1993) 4 -162 Table 4 -20 Post Year 2010 Intersection Capacity Utilization Summary Intersection General Plan Specific Plan AM PM AM PM Interstate 5 @ 3. SB Ramps & La Costa Ave 0.62 0.75 0.61 0.77 4. NB Ramps & La Costa Ave 0.62 0.68 0.63 0.81 10. SB Ramps & Leucadia Blvd 0.63 0.57 0.63 0.66 11. NB Ramps & Leucadia Blvd 0.63 0.71 0.67 0.74 22. SB Ramps & Encinitas Blvd 0.57 0.62 0.58 0.66 23. NB Ramps & Encinitas Blvd 0.48 0.70 0.54 0.79 Saxony Road a 5. La Costa Ave 0.63 0.86 0.63 0.921 12. Leucadia Blvd 0.49 0.49 0.53 0.68 24. Encinitas Blvd 0.40 0.68 0.51 0.86 Quail Gardens Drive @ 61. Leucadia Blvd 0.61 0.68 0.67 0.73 25. Encinitas Blvd 0.42 0.66 0.51 0.75 Balour Drive @ 26. Encinitas Blvd 0.37 0.67 0.43 0.73 Via Cantebria @ 55. Leucadia Blvd 0.48 0.73 0.50 0.87 27. Encinitas Blvd 0.48 0.75 0.50 0.87 El Camino Real @ 6. La Costa Ave 0.77 0.951 0.77 1.031 53. Calle Barcelona 0.48 0.931 0.49 0.971 13. Olivenhain Rd 0.73 1.091 0.77 1.081 59. Woodley 0.55 0.86 0.65 1.051 15. Garden View Rd 0.60 0.78 0.55 0.81 16. Mountain Vista Dr 0.68 0.68 0.68 0.75 28. Encinitas Blvd 0.61 0.79 0.63 0.79 Rancho Santa Fe Road a 7. La Costa Ave 0.74 0.89 0.73 0.87 14. Olivenhain /Alvaro /RS 0.80 0.76 0.79 0.74 Garden View Road a 58. Via Cantebria - -- 0.30 0.62 Access Road @ 60. Leucadia Blvd 0.50 0.78 0.46 0.86 1 Exceeds Level of Service (LOS) D. Level of service ranges: 0.00 - 0.60 A 0.61 - 0.70 B 0.71 - 0.80 C 0.81 - 0.90 D 0.91 - 1.00 E 1.01 + F Source: Austin -Foust Associates (1993) 4 -163 ADT Volumes (000's) 4 -164 Table 4 -21 Interim Year Intersection Capacity Utilization Summary Intersection General Plan Specific Plan AM PM AM PM Interstate 5 a 3. SB Ramps & La Costa Ave 0.50 0.50 0.50 0.55 4. NB Ramps & La Costa Ave 0.52 0.52 0.54 0.60 10. SB Ramps & Leucadia Blvd 0.50 0.60 0.51 0.62 22. SB Ramps & Encinitas Blvd 0.87 0.88 0.88 0.90 23. NB Ram es & Encinitas Blvd 0.68 1.021 0.68 1.051 Saxony Road @ 1 1 1.20 1 0.97 1.48 5. La Costa Ave 0.95 0.31 0.43 0.31 0.441 12. Leucadia Blvd 0.90 0.63 0.94 24. Encinitas Blvd 0.61 Piraeus Street bl 11. Leucadia Blvd 0.54 0.86 0.54 0.88 Quail Gardens Drive a 0.77 0.58 0.82 25. Encinitas Blvd 0.57 Balour Drive fil 26. Encinitas Blvd 0.55 0.74 0.57 0.77 Via Cantebria a 27. Encinitas Blvd 0.57 0.73 0.59 0.79 EL Camino ReaL @ 6. La Costa Ave 0.871 0.761 0.881 0.831 13. OLivenhain Rd 0.941 1.051 59. Woodley -- -- 0.43 0.87 15. Garden View Rd 0.58 0.70 0.61 0.85 16. Mountain Vista Dr 0.39 0.73 0.40 0.75 28. Encinitas Blvd 0.52 0.88 0.54 0.90 Rancho Santa Fe Road a 0.67 0.61 0.68 0.65 7. La Costa Ave 0.49 0.57 0.58 14. OLivenhain 0.55 Access Road @ '- 0'20 0'98 60. Leucadia Blvd - 1 Exceeds Level of Service (LOS) D. Level of service ranges: 0.00 - 0.60 0.61 - 0.70 0.71 - 0.80 0.81 - 0.90 0.91 - 1.00 1.01 + Source: Austin -Foust Associates (1993) 4 -165 Specific Plan Trip Generation and Distribution Specific Plan trip generation has been calculated to assess effects on both the interim and long -range circulation system. Specific Plan land use and trip generation data for Land Use Plans A and B are listed in Table 4 -22. As previously noted, development of the Thornton and Leaf properties is already accounted for as part of the General Plan traffic conditions. Land Use Plan A will generate 68,037 ADT with an AM peak hour volume of 2666 vehicles and a PM peak hour volume of 6762 vehicles. Land Use Plan B will generate 67,705 ADT with AM and PM peak hour volumes of 2652 and 6719 vehicles respectively. For Land Use Plan A this volume is 42,268 ADT greater than the 25,769 ADT anticipated under the General Plan. For Land Use Plan B the volume is 41,936 ADT more than with the General Plan. Direct regional access to the Specific Plan area will be from I -5 by way of Leucadia Boulevard, with indirect access by way of La Costa Avenue and Encinitas Boulevard to other roads. Local access will be provided by Leucadia Boulevard, Saxony Road, Quail Gardens Drive, Via Cantebria, and El Camino Real. The Specific Plan circulation system also includes the extension of several Circulation Plan roadways including Leucadia Boulevard, Quail Gardens Drive, Via Cantebria, and Garden View Road. Long -range Specific Plan trip distribution for circulation system roadways is shown on Figure 4 -38. At buildout 25% of the traffic will use Leucadia Boulevard from Sidonia Street to I -5. The balance is broadly distributed with the highest amount, or 16 %, on E1 Camino Real north of Olivenhain Road. Long -Rance Circulation System Post year 2010 traffic volumes with the Specific Plan are shown on Figure 4 -39. This condition reflects General Plan buildout traffic plus Land Use Plan A with the hotel /inn optional use. This version of the Specific Plan represents the maximum intensity of development in terms of vehicle trips. Traffic- volumes will be higher than those under the framework for the Specific Plan area. The largest differences are on E1 Camino Real between Garden View Road and Mountain Vista Drive with an increase of 5000 ADT (9 %), on Encinitas Boulevard between Quail Gardens Drive and Via Cantebria with an increase of 4,000 ADT (14 %), and on Leucadia Boulevard just east of I -5 with an increase of 4000 ADT (13 %). The .� segment of E1 Camino Real between Garden view Road and Mountain Vista Drive at 63,000 ADT will fall below LOS D (60,000 ADT) under the regional Congestion Management Program (CMP) and a Deficiency Plan will have to be prepared and implemented. Long -range intersection ICU values with the Specific Plan are listed in the previously presented Table 4 -20. There is a deterioration in deficient conditions for two El Camino Real intersections. At La Costa Avenue the PM peak hour ICU value increases from 0.95 to 1.03. At Calle Barcelona the PM peak hour ICU value goes from 0.93 to 0.97. Two intersections are caused to go deficient. The ICU value for Saxony Road at La Costa Avenue increases from 0.86 to 0.92 during the PM peak hour. At the intersection of E1 Camino Real and Woodley Road the ICU PM peak hour value of 0.86 increases to 1.05. The General Plan Circulation Plan shows the extension of Via Cantebria in Green Valley on north into Carlsbad as a Collector Roadway to intersect with La Costa Avenue. A Local Roadway connection between the extension and E1 Camino Real at Levante is also shown on the plan. It is assumed that because of wetland resources along La Costa Avenue and the close proximity of the Via Cantebria intersection with the La Costa Avenue intersection at El Camino Real a connection in this location is not feasible. However, an extension of Via Cantebria with one or more connections to E1 Camino Real remains plausible. For both Land Use Plans A and B the Specific Plan circulation system provides a connection point for extension of Via Cantebria north into the City of Carlsbad. This extension would ultimately intersect with a westerly extension of Calle Barcelona and another roadway, both connecting with E1 Camino Real. 4 -166 Table 4 -22 Specific Plan Land Use and Vehicle Trip Generation Summary Land Use Type )uantity (DU,AC, SF,ST,RM) AM Peak Hour PM Peak Hour Average Daily Trips (ADT) In Out Total In Out Total Land Use Plan A Residential Estate (0-1) Low (1 -5) Med /High (8 -15) High (15 +) 3.00 DU 316.00 DU 113.00 DU 873.00 DU 1 50 18 87 2 202 57 332 3 252 75 419 2 222 57 402 1 95 34 174 3 317 91 576 33 3160 802 5238 General Commercial 50,000.00 SF 36 32 68 109 116 225 3000 Discount Commercial 650,000.00 SF 546 364 910 2275 2275 4550 45500 Professional Office 145,000.00 SF 365 41 406 75 302 377 2900 Medical Office 25.000.00 SF 60 15 75 38 88 126 1250 Elementary School 87.00 ST 107 68 175 10 25 35 682 Resort Hotel 150.00 RM 53 35 88 69 47 116 1500 Church 41,000.00 SF 20 5 25 25 25 50 615 Park ( Active /Rec) 23.30 AC 12 12 24 23 23 46 583 Park (Passive /OS) 222.90 AC 21 21 42 47 47 94 1119 Agriculture (0 en field) 134.10 AC 0 0 0 0 0 0 268 Golf Course 173.40 AC 83 21 104 47 109 156 1387 Total 1459 1207 2666 3401 3361 6762 68037 Land Use Plan B Residential Estate (0-1) Low (1 -5) Med /High (8 -15) High (15 +) 3.00 DU 400.00 DU 113.00 DU 665.00 DU 1 63 18 66 2 279 57 253 3 347 75 319 2 305 5- 30 e, 1 131 34 133 3 436 91 439 33 4340 802 3990 General Commercial 50,000.00 SF 36 32 68 109 116 225 3000 Discount Commercial 650,000.00 SF 546 364 910 2275 2275 4550 45500 Professional Office 145,000.00 SF 365 41 406 75 302 377 2900 Medical Office 25,000.00 SF 60 15 75 38 88 126 1250 Elementary School 478.00 ST 105 67 172 10 24 34 669 Resort Hotel 150.00 RM 53 35 88 69 47 116 1500 Church 41,000.00 SF 20 5 25 25 25 50 615 Park (Active /Rec) 23.30 AC 12 12 24 23 23 46 583 Park (Passive /OS) 176.80 AC 18 18 36 35 35 70 884 Agriculture (Open field) 126.00 AC 0 0 0 0 0 0 252 Golf Course 173.40 AC 83 21 104 47 109 156 1387 Total 1446 1201 2652 1 3376 3343 6719 1 67705 Source: Austin -Foust Associates (1993) 4 -167 4 -168 � h i o 3 O 2 I3 GB Lj u LAKE < L_J S IA Al � hK. 0 8 r Z= i mvoy W r MARDO QI z SAXON rTl'ujJ o N aECD DppNEUS SOO CL< O 8 <U as a —EL W%0 Ix71 1^I� 8 lJ 0 W 8 ' � < _ I CA < � CANIFDRV' BAIOVA - 1 W ate.. � C7 a Syr J Z Z r�i Q U —1 I z¢ W r MANGO b 0 A W 8 a J S SAxpnr SPN z o.0 m V O m 0 0 aEW US HOMO x L o +' Q e au N • Figure 4 -38 Trip Distribution Source: Austin -Foust Associates (1993) 4 -168 4 -169 rn 9 V 39 22l� p �P� O 8 Z y, O w CNJ.E OARCELONA 0 34 27 49 "` 17 ` 36 31 t 37 OVVENMNN a, LEUCAaA C" 00 pA _ D7 Y A � i y g H s 8 z + A �CAROEN i w 2 13 6 a p MOUNT NN Y. < 1.i 17 to 36 v+ to v` CL J 34 < F l p (P 45 tO ENaNi P. v a H 9 7 P O J REOUEZA fi0 2 m _ ()1 � z J = J W S y W :0 O s ^ W O QA 31 17 19 SANTA FE to T G ca L+ ? M �i7 °o+ A h� PACIFIC OCEAN `'s ADT Volumes (0001x) Figure 4 -39 Long -Range Traffic Volumes Specific Plan Source: Austin -Foust Associates (1993) 4 -169 Traffic volumes for the circulation system with the extension of Via Cantebria north into the City of Carlsbad are shown on Figure 4 -40 with corresponding intersection ICU values listed in Table 4 -23. The segment of E1 Camino Real between Garden View Road and Mountain Vista Drive would not fall below LOS D under the CMP. Deficient conditions would be corrected for Saxony Road at La Costa Avenue where there would be a reduction in the ICU PM peak hour value from 0.92 to 0.89. Although there would be some relief in deficient conditions at E1 Camino Real intersections with La Costa, Olivenhain Road, and Woodley the ICU values would remain above 0.90 at 1.01, 1.07, and 0.97 respectively. There would also be a deterioration in deficient conditions at E1 Camino Real and Calle Barcelona where the ICU PM peak hour value would rise from 0.97 to 1.01. Interim Year Circulation Svstem Interim Specific Plan trip distribution is shown on the previously presented Figure 4 -38. The interim condition assumes that there is not a connection between Leucadia Boulevard and El Camino Real. Forty -six percent of the traffic utilizes E1 Camino Real south of Garden View Road. Of the balance, 26% uses E1 Camino Real north of Olivenhain Road. There is a shift in traffic patterns between interim and the build -out conditions due to changing demographic patterns within the surrounding area and the extension of Leucadia Boulevard and other roadways. In addition, distribution within the Specific Plan area increases because of interaction between residential and new commercial development. Interim year ADT volumes with the Specific Plan are shown on Figure 4 -41 with interim year ICU values found in the previously presented Table 4 -21. This condition reflects the first phase (Phase 1A), or Stage 1 of Specific Plan development with 400,000 square feet of the regional commercial center. There will be 28,000 ADT with a 560 AM peak hour volume and 2800 trips during the PM peak hour. The greatest increases in traffic volume are on El Camino Real with 10,000 ADT (27 %) between Garden View Road and Mountain Vista Drive, and 8000 ADT (19 %) north of Olivenhain Road and South of Mountain Vista Road. Large increases are also noted for Encinitas Boulevard with 5000 (14 %) between Quail Gardens Drive and Via Cantebria and 4000 ADT (13 %) east of Via Cantebria. In the interim year, there is a deterioration in deficient conditions for three intersections. The PM peak hour ICU value for the north bound ramps of the I -5 interchange with Encinitas Boulevard increases from 1.02 to 1.05. At the Saxony Road intersection with La Costa Avenue the AM peak hour ICU value goes from 0.95 to 0.97 while the PM peak hour ICU value goes from 1.20 to 1.48. At the intersection of E1 Camino Real and Olivenhain Road the AM peak hour ICU increases from 0.94 to 1.05 while the PM peak hour ICU value goes from 0.96 to 1.30. Two intersections are caused to go deficient. The ICU value for Saxony Road at Encinitas Boulevard increases from 0.90 to 0.94 during the PM peak hour. At the Specific Plan commercial district access road intersection with Leucadia Boulevard the ICU value is 0.98 during the PM peak hour. Regional Commercial Center Access The traffic data assumes three access points for the regional commercial center in the Green Valley planning area. One point is Leucadia Boulevard with a four - way signalized intersection providing access to the northern commercial site and to the southern site. Another point is E1 Camino Real with a four -way signalized intersection with the west leg serving the southern commercial site and the east leg serving the Home Depot property. The third point is Via Cantebria /Garden View Road with a four -way signalized intersection in which Via Cantebria forms the south and west legs, Garden View is the east leg, and the north leg provides access to the commercial site. Although there may be some right -in- right -out driveways to augment these access points, it is assumed that traffic will enter and exit via one of the three signalized intersections. Proper lane configurations and stacking length for existing vehicles needs to be considered on the access roads. 4 -170 4 -171 rn 38 N 14 �0 v' cosT^ 38 J 21 w �a ?3 LO i Z b h �o 2 O 8 Sj LL Sl� O W 8 ('ma BARCELONA C N EA y, 01 27 49 w 38 33 39 OUVENMAIN mod, 17 U LEUCADIA A LO $ m r > < N N O U% ; wZ O �' � p GARDEN 0 6 2 13 MOUNTAIN HS�A Y _ N a ' Cr 1_1 tJ 17 36 1D u Jg 4 Unn ffi 4 26 34 sY < 2 y O� 45 tD ENONI I- 9 7 `r REOUEZA m -K z J 17 1 SANTA to FE (p �O u N i CD u � \a 18 p 12 N PACIFIC h OCEAN �s tp ADT Volumes (000's) Figure 4 -40 Long -Range Traffic Volumes Extension of Via Cantebria Source: Austin -Foust Associates (1993) 4 -171 Table 4 -23 post Year 2010 Intersection Capacity utilization with Via Cantebria Extension Summary Intersection Without Extension I With Extension DM I AM I PM Interstate 5 a 0 67 0.74 0.70 0.82 11. NB Ramps & Leucadia Blvd 0.54 0.79 0.54 0.80 23. NB Ramps & Encinitas Blvd Saxony Road a 0.63 0.921 0.63 0.89 5. La Costa Ave 0.53 0.68 0.52 0.73 12. Leucadia Blvd Quail Gardens Drive a 0.67 0.73 0.69 0.77 61. Leucadia Blvd Via Cantebria @ 0.50 0.87 0.62 0.78 55. Leucadia Blvd 0.50 0.87 0.51 0.89 27. Encinitas Blvd El Camino Real @ Ave 0 n 1.031 0.76 1.011 6. La Costa 0.49 0 971 . 052 1.01 53. Calle Barcelona 0.77 1.08,1 0.75 1 071 13. Olivenhain Rd (0.77) (0.94 ) (0.61) (0.74 0.65 1 0.63 0.97 59. Woodley (0.63) (0.961) (0.61) (0.88) 0.55 0.81 0.54 0.76 15. Garden View Rd 0.68 0.75 0.67 0.68 16. Mountain Vista Dr 0.63 0.79 0.62 0.74 28. Encinitas Blvd Garden View Road @ 0.30 0.62 0.31 0.73 58. Via Cantebria Access Road @ 0 0.86 0.40 0.70 60. Leucadia Blvd 1 Exceeds Level of Service (LOS) D. (0.00) means values with proposed mitigation measures at these Locations. Level of service ranges: 0.00 - 0.60 A 0.61 - 0.70 B 0.71 - 0.80 C 0.81 - 0.90 D 0.91 - 1.00 E 1.01 + F Source: Austin -Foust Associates (1993) 4 -172 4 -17j 15 30 N �Z ? Qe 7 ryM 7A Q� A 15 16 25 q 1\4ENNMN (T 11 8 LEUCADiA A W $ � � p g r �6 i o % J N i 5 K ��1 p DGARDEN m Q, 4 12 TA MOUNTAIN NS y i 6 32 J LIN a J m io 44 q b 34 29 45 J ENdNITA h O t� N 3 6 10 = CZZ REOUEZA U 2 U J J W T z z W C ab 14 18 16 �S SANTA FE (� N Y N m `5 18 17 9 N a ��s Y tj PACIFIC OCEAN ADT Volumes (000's) Figure 4 -41 Interim Traffic Volumes Specific Plan Source: Austin -Foust Associates (1993) 4 -17j 4.10.3 MITIGATION MEASURES Lone Range Circulation System The City of Encinitas requires payment of project share fees for all development in the City through a transportation improvement program. In addition, recommended improvements to relieve long -range deficiencies onsite which should be the responsibility of the project are listed in Table 4 -24. The improvements include construction of the segment of Via Cantebria in Green Valley, a new intersection at Via Cantebria and Leucadia Boulevard, and additional lanes on E1 Camino Real. As indicated in the previously presented Table 4 -23, with these improvements and no extension of Via Cantebria into Carlsbad the ICU values for E1 Camino Real intersections at Olivenhain Road and Woodley are lowered to 0.94 and 0.96, but not reduced to insignificance. With these improvements and the extension of Via Cantebria into Carlsbad ICU values for E1 Camino Real at Olivenhain Road and Woodley would be reduced to insignificant levels of 0.74 and 0.88. The Specific Plan financing strategies include a Public Facilities Financing Program (Development Agreement). This program should include provisions for payment of a fair share of costs for traffic improvements required because of the Specific Plan. Three Specific Plan impacted intersections are located in the City of Carlsbad. They are Saxony Road at La Costa, E1 Camino Real at La Costa, and El Camino Real at Calle Barcelona. Because these intersections are under Carlsbad jurisdiction and future land use development in Carlsbad contributes to the need for new and improved facilities in Encinitas, a joint fair share formula should be derived by the two cities for the improvements with the Specific Plan sponsors or developers participating on a proportional basis. The Specific Plan Public Facilities Financing Program (Development Agreement) should include provisions for payment of a fair share of costs for traffic improvements required because of the Specific Plan. Measures should be identified that reduce intersection ICU values in Carlsbad to 0.90 or less and lower identified long -range traffic circulation impacts to levels of insignificance. Interim Year Circulation System For interim impacts at the intersection of Saxony and La Costa Avenue the already planned widening of La Costa Avenue to four lanes will relieve the deficiency. For interim impacts at the intersection of Saxony Road with Encinitas Boulevard and I -5 NB Ramps consideration should be given to implementing part of the long - range improvements being investigated for this location to relieve the deficiency. In addition, recommended improvements to relieve interim deficiencies which should be the responsibility of the project are listed in the previously presented Table 4 -24. The Specific Plan Public Facilities Financing Program (Development Agreement) should include provisions for payment of a fair share of costs for traffic improvements required because of the Specific Plan. The above measures will reduce intersection ICU values to 0.90 or less and lower identified interim traffic circulation impacts to levels of insignificance. Commercial Center Access Access drive configuration guidelines to ensure proper lane configuration and stacking length for the regional commercial center are listed in Table 4 -25. They apply to Leucadia Boulevard, E1 Camino Real, and Via Cantebria /Garden View. These measures will ensure that there will be no significant access drive traffic impacts. 4.11 NOISE An acoustical study of the Specific Plan and Leucadia Boulevard improvements section has been conducted by James C. Berry, Acoustician (1993). The study includes a description of existing conditions, future noise levels without the 4 -174 Table 4 -24 Traffic Impact Mitigation Requirements Location Lanes Volume /Lane Improvements Lon -Range Via Cantebria Leucadia Boulevard Two North Bound Lanes Construct section of new roadway adjacent -- North Bound Right Lane to Specific Plan area 400 Two South Bound Lanes Participate in construction of northward 150 South Bound Right Lane extension Leucadia Boulevard at Via Cantebria El Camino Real Construct new intersection El Camino Real at OLivenhain Road Add North Bound free right-turn lane El Camino Real at WoodLey Add shared West Bound Left /thru -lane 410 450 Interim Year Leucadia Boulevard 160 Construct section of new roadway adjacent South Bound Right Lane 330 to Specific Plan area Access Road at Leucadia Boulevard - Install si naL El Camino Real at OLivenhain Road Add North Bound left -turn lane Add 2nd South Bound left -turn lane and separate South Bound right -turn lane Add 3rd South Bound thru -lane Add dual West Bound left -turn lanes El Camino Real at Woodley Construct west leg of new intersection Add South Bound right-turn lane Saxony Road at Encinitas Boulevard Add 3rd West Bound thru -lane Source: Austin -Foust Associates (1993) Table 4 -25 Regional Commercial Center Access Drive Configuration Guidelines Location Lanes Volume /Lane Length (ADT) (FU Leucadia Boulevard Two North Bound Lanes 290 -- North Bound Right Lane 410 400 Two South Bound Lanes 120 150 South Bound Right Lane 120 -- El Camino Real East Bound Lane 240 -- East Bound Shared Turn Lane 230 -- East Bound Right Lane 410 450 Via Cantebria /Garden View Road South Bound Shared Turn Lane 160 -- South Bound Right Lane 330 270 Source: Austin -Foust Associates (1993) 4 -175 Specific Plan, Specific Plan impacts, Leucadia Boulevard widening impacts, and mitigation measures. A copy of the report, labeled Appendix G, is included with other technical appendices to this document. Its content is summarized in the following discussion. 4.11.1 EXISTING CONDITIONS Current Noise Levels Current noise levels in the project area are mainly controlled by traffic on roads. Agricultural activities and aircraft overflights are minor noise sources. Noise measurements at twelve representative locations indicate relatively low noise levels in the area. The underlying ambient at the more remote locations s is in the range of 34 to 39 A- Weighted Sound Pressure Level (dB(A)) suggesting a rural setting. Noise levels are higher along streets such as Saxony Road, Quail Hollow Drive, Sidonia Street, and Via Cantebria ranging from 40 to 55 dB(A). The only locations where noise levels exceed 60 dB(A) Community Noise Equivalent Level /Day -Night Average Sound Level (CNEL /Ldn) are along the edge of E1 Camino Real or at a point directly overlooking Interstate 5. According to the Specific Plan traffic study discussed in the previous subsection entitled Traffic, the existing section of Leucadia Boulevard carries 7000 ADT from I -5 to Saxony Road and 2000 from Saxony Road to Sidonia Street. The segment from I -5 to just east of Saxony is basically a 24 foot wide, two lane road with no gutters, curbs, or sidewalks. Posted speed limit is 30 miles per hour (MPH) . East of Saxony the street widens out to about 100 feet with a 60 foot wide median and single traffic lane on each side. There are some asphalt berms along the edges and a concrete curb on the north side, but no sidewalks. The speed limit is not posted but assumed to be 30 MPH. From I -5 to Saxony Road dwellings facing Leucadia Boulevard have directly connecting driveways. The situation is similar on the south side of the eastern segment to Sidonia Street. On the north side next to the front of this segment houses d boulevard These houses are also elevated abovethev yards roadway and have wooden fences on the top of slope banks. Existing noise levels for Leucadia Boulevard from a Federal Highway A) computer model relying on traffic study data and other Administration (FHW inputs are listed Table 4 -26. The levels range from 53 to 65 dB(A) CNEL /Ldn. e highest, in the 60 to 65 dB(A) CNEL /Ldn range, along the western Noise levels ar segment from I to Saxony R oad. The lower levels, below 60 dB(A) CNEL /Ldn, occur along the eastern segment from Saxony to Sidonia Street. Existing noise levels re outsideathecright- of way significant into occupied property along the r contour extends roadway. Future Noise Levels at General Plan Buildout Road improvements are expected to occur in the project area in conjunction with buildout of the Encinitas General Plan shortly after the year 2010. Affected circulation element roads include Leucadia Boulevard, Saxony Road, Quail Gardens Drive, and Via Cantebria as well as numerous connecting non - circulation element local streets. If all other conditions remain constant, noise levels along these routes will rise by a factor depending on the increase in traffic flow. The average human barely notice change in levels of 3 dB(A). Consequently, gradual changes over ti ewlbeundetectable Expected noise level changes with buildout of the General Plan beyond the year 2010 are listed in Table 4 -27. In cases where a road does not exist, or is very lightly traveled, noise in the area increases substantially. Some noise levels decrease because of changes in the circulation pattern. There are a number of roads where the changes in noise level are in excess of 3 dB(A), both up and down, and will be clearly noticed and significant. The roads with significant increases include Leucadia Boulevard, Quail Gardens Drive, Via Cantebria, and Calle Barcelona. Saxony Road experiences a decrease in noise level. 4 -176 Table 4 -26 Existing Noise Levels for Leucadia Boulevard Improvement Section Parcel Number Address Elevation (Ft) Distance House to Road CL (Ft) Noise Level (dB(A) CNEL /Ldn) Pad Road North Side Headin East - Piraeus Street to Sidonia Street 254 - 060-14 636 Leucadia Boulevard 174 174 125 59 254 - 363 -16 660 Leucadia Boulevard 178 178 68 62 254 - 363 -32 Greenhouse -- -- -- -- 254- 363 -33 Greenhouse -- -- -- -- 254- 363 -35 Greenhouse -- -- -- -- 254- 362 -10 917 Urania Avenuel 189 189 120 NA 254 - 362 -12 750 Leucadia Boulevard 191 192 48 63 254 - 362 -13 764 Leucadia Boulevard 193 193 48 63 254 - 362 -14 Greenhouse -- -- -- -- 254- 362 -46 796 Leucadia Boulevard 200 197 70 62 254 - 362 -40 806 Leucadia Boulevard 201 202 63 62 254 - 362 -21 804 Leucadia Boulevardi 204 202 180 NA 254 - 362 -38 830 Leucadia Boulevard 206 204 54 63 254 - 362 -41 840 Leucadia Boulevard 207 206 85 61 254 - 362 -21 836 Leucadia Boulevard) 208 206 143 NA 254- 362 -32 Greenhouse -- -- -- -- 254- 361 -01 905 Saxony Road 214 210 43 64 254 - 361 -02 915 Saxony Roadi 217 207 155 NA 254 - 552 -07 912 St.Albans Drive 232 214 170 53 254 -552 -08 906 St.Albans Drive 233 220 110 55 254 - 552 -09 911 St.Albans Drive 233 228 140 54 254 -552 -17 904 Oldham Court 247 238 75 56 254 -552 -18 903 Oldham Court 248 243 105 55 254 - 522 -32 902 Passiflora Avenue 265 256 90 55 254 -553 -08 903 Passiflora Avenue 266 270 75 56 254 - 553 -21 1010 Guildford Court 294 284 175 53 254 - 553 -22 1002 Guildford Court 294 293 90 55 254 - 553 -23 1003 Guildford Court 294 298 90 55 254 - 553 -32 1103 Sidonia Street 313 308 90 55 254- 200-04 1101 Leucadia Boulevard 317 313 110 55 4 -177 1 House behind one on Leucadia Boulevard currently receiving shielding. Source: Berry (1993) 4 -178 Address Elevation (Ft) Distance House to Road CL (Ft) Noise Level (dB(A) CNEL /Ldn) Parcel Number Pad Road South Side Heading West - Sidonia Street to I -5 256- 232 -47 1089 Leucadia Boulevard 310 309 105 55 256- 232 -46 1081 Leucadia Boulevard 307 305 110 55 256- 232 -61 1071 Leucadia Boulevard 302 302 90 55 256- 232 -07 1037 Leucadia Boulevard 294 290 95 55 256 -232 -06 1027 Leucadia Boulevard 285 282 90 55 256- 232 -02 1021 Leucadia Boulevard 276 276 90 55 256- 232 -01 895 Passiflora Avenue 269 266 85 54 256- 231 -13 896 Passiflora Avenue 258 253 70 57 256- 231 -19 Vacant Lot - -- 256- 231 -20 891 Eugenie Avenue 244 238 105 55 256- 231 -15 945 Leucadia Boulevard 235 229 100 55 256- 231 -21 895 Saxony Road 215 214 54 58 256- 164 -39 885 Leucadia boulevard 206 208 45 63 256- 164 -01 893 Del Rio Avenue 197 198 35 65 256 -163 -40 829 Leucadia Boulevard 206 206 55 63 256- 163 -01 807 Leucadia Boulevard 203 202 35 65 256- 162 -40 777 Leucadia Boulevard 197 197 38 64 256- 162 -02 767 Leucadia Boulevard 195 195 59 62 256- 162 -01 755 Leucadia Boulevard 193 194 55 63 256- 161 -40 735 Leucadia Boulevard 190 191 45 63 256- 161 -01 873 Clark Avenue 186 185 33 65 256 -122 -06 675 Leucadia Boulevard 182 182 70 62 256- 122 -05 Vacant Lot -- -- 256- 122 -04 Vacant Lot -- -- 256- 122 -61 Holiday Inn 176 176 110 60 1 House behind one on Leucadia Boulevard currently receiving shielding. Source: Berry (1993) 4 -178 Table 4 -27 Noise Level Changes for General Plan Buildout Post Year 2010 Road and Section Traffic Volume Noise Level (000 ADT) (dB(A)) Existing Buildout Interstate 5 South of Encinitas Boulevard 1681 199 0.7 Encinitas Boulevard to Leucadia Boulevard 1651 199 0.8 Leucadia Boulevard to La Costa Avenue 1601 200 1.0 North of La Costa Avenue 1571 1.0 La Costa Avenue West of I -5 10 20 3.0 I -5 to Saxony Road 28 38 1.3 Saxony Road to EL Cai:ino Real 26 37 1.5 East of El Camino Real 14 14 0.0 Calle Barcelona East of EL Camino Real NR 8 SIG Garden View Road East _' EL Camino Real 5 8 2.0 Leucadia Boulevard West of I -5 15 26 2.4 I -5 to Saxony Road 7 32 6.6 Saxony Road to Quail Gardens Drive 2 28 11.5 Quail Gardens Drive to Via Cantebria DNE 35 SIG Via Cantebria to El Camino Real DNE 35 SIG East of El Camino Real DNE 47 SIG Encinitas Boulevard West of I -5 27 35 1.1 I -5 to Saxony Road 39 42 0.3 Saxony Road to Quail Gardens Drive 37 38 0.1 Quail Gardens Drive to Via Cantebria 32 29 -0.4 Via Cantebria to El Camino Real 27 26 -0.2 East of EL Camino Real 26 35 1.3 Santa Fe Drive West of I -5 12 31 4.1 I -5 to Nardo Road 15 16 0.3 Nardo Road to Balour Drive 13 18 1.4 Balour Drive to EL Camino Real 14 12 -0.7 4 -179 Road and Section Traffic Volume (000 ADT) Noise Level (dB(A)) Existin Buildout Saxony Road 6 7 0.7 Encinitas Boulevard to Union Street 6 2 -4.8 Union Street to Leucadia Boulevard 6 2 -4.8 (two sections) Leucadia Boulevard to Quail Gardens Drive 32 1 3 -4.8 1.8 Quail Gardens Drive to La Costa Avenue 22 Quail Gardens Drive NR 14 SIG Encinitas Boulevard to Union Street 11 SIG Union Street to Leucadia Boulevard NR NR 11 SIG (two sections) DNE 3 SIG Leucadia Boulevard to Saxon Road Via Cantebria Encinitas Boulevard to Leucadia Boulevard 10 15 1.8 SIG (three sections) DNE DNE 8 8 SIG El Camino Real Encinitas Boulevard 33 43 1.1 Santa Fe Drive to Encinitas Boulevard to Mountain Vista Drive 56 58 1.6 2.4 Mountain Vista Drive to Garden View Road 33 34 57 2.2 Garden View Road to Olivenhain Road 24 47 2. Olivenhain Road to Calle Barcelona 24 42 2 4 Calle Barcelona to La Costa Avenue 1 Adjusted values for traffic flow. 2 Currently no connection to Quail Gardens Drive. [DNE] Means road segment does not exist. [NR] Means no recorded ADT. [SIG] Means significant change in noise level. Source: Berry (1993) 4 -180 4.11.2 ENVIRONMENTAL EFFECTS Noise impacts are significant if the 60 or greater dB(A) CNEL /Ldn contour extends beyond the right -of -way of a roadway or property line of other noise sources and encroaches into residential, transient lodging, long -term medical care, and public /private educational, library, church, or other gathering properties (sensitive receptors). In addition, noise impacts are significant if indoor residential noise levels exceed 45 dB(A). Noise impacts may also be considered significant under certain circumstances if there is a caused increase of over 3 dB(A) in level along a roadway or other source property line. Implementation of the Specific Plan will almost everywhere not result in detectable increases in vehicle traffic noise levels along roadways over that expected with buildout of the Encinitas General Plan. Specific Plan residential uses are not expected to introduce any new or unusual noise sources into the surrounding neighborhoods. However, there are certain significant noise impacts associated with project construction activities, completion of circulation element roads within the plan area, new non - residential uses in the plan area, and improvements to Leucadia Boulevard. Construction Activities Implementation of the Specific Plan, development of the Thornton property, and Leucadia Boulevard improvements will involve various construction activities. Grading, excavating, paving, hauling, and building construction will require many types of equipment ranging from earth movers and trucks to small hand tools. Typical noise levels at 50 feet from the source of construction activities range from 78 to 89 dB(A). Effects will be significant where excessive levels are experienced by sensitive receptors. The impacts will be short -term for the project buildout period, and occur in separate locations for sporadic time periods because of phasing. Specific Plan As indicated by the traffic study, implementation of the Specific Plan will result in increases in traffic volumes over those anticipated by the General Plan. There will be corresponding increases in noise levels along affected roadways. The noise level changes for Land Use Plan A are listed in Table 4 -28. This condition reflects maximum intensity of development with the hotel /inn optional use which generates the most traffic. Specific Plan traffic generated noise levels are 3 dB(A) or less and not detectable. There will be new noise from the extension of Via Cantebria through the Green Valley planning area. Noise level changes for Land Use Plan A with the extension of Via Cantebria north into Carlsbad are listed in Table 4 -29. Again, Specific Plan traffic generated noise levels are not detectable and there will be new noise from Via Cantebria. Noise levels along Leucadia Boulevard near I -5 are slightly higher with the extension into Carlsbad while along E1 Camino Real the noise levels are lower. Implementation of the Specific Plan will result in construction of a number of circulation element roads within the plan area. These roadways include the extensions of Leucadia Boulevard through from Sidonia Street to E1 Camino Real, Quail Gardens Drive from its terminus to Quail Hollow Drive, Via Cantebria from its terminus through Green Valley to Leucadia Boulevard, and the extension of Garden View Road. There will also be a number of non - circulation element local streets connecting to these roadways. Noise contours for the circulation element roadways from the FHWA computer model are listed in Table 4 -30. The 60 dB(A) CNEL /Ldn contour will extend beyond the standard right -of -way into adjacent properties for all of these roadways. Noise levels along non - circulation element streets will not be significant. Specific Plan residential land uses are not expected to introduce any new or unusual noise sources into surrounding neighborhoods or inflict excessive noise on each other. No significant noise is expected from the golf course. On -going and future agriculture will not involve many large machines. Agricultural 4 -181 Table 4 -28 Noise Level changes for Specific Plan Land Use Plan A 4 -182 Traffic Volume Noise Level Road and Section (000 ADT) (dB(A)) General Land Use Plan Plan A Buildout Interstate 5 199 195 -0.1 South of Encinitas Boulevard 199 194 -0.1 Encinitas Boulevard to Leucadia Boulevard 200 200 0.0 Leucadia Boulevard to La Costa Avenue 196 196 0.0 North of La Costa Avenue La Costa Avenue 20 22 0.4 West of I -5 38 39 0.1 I -5 to Saxony Road 37 39 0.2 Saxony Road to EL Camino Real 14 14 0.0 East of EL Camino Real Calle Barcelona EL Camino Real to Via Cantebria 8 8 0.0 East of EL Camino Real Garden View Road 8 8 0.0 East of EL Camino Real 8 SIG EL Camino Real to Via Cantebria Leucadia Boulevard 26 27 0.2 West of I -5 32 36 0.5 I -5 to Saxony Road 28 31 0.4 Saxony Road to Quail Gardens Drive 35 37 0.2 Quail Gardens Drive to Via Cantebria 35 34 -0.1 Via Cantebria to EL Camino Real 47 49 0.2 East of El Camino Real Encinitas Boulevard 35 36 0.1 West of I -5 42 45 0.3 I -5 to Saxony Road 38 39 0.1 Saxony Road to Quail Gardens Drive 29 33 0.6 Quail Gardens Drive to Via Cantebria 26 0.6 Via Cantebria to EL Camino Real 26 35 34 -0.1 East of El Camino Real Santa Fe Drive 31 31 0.0 West of I -5 16 17 0.3 I -5 to Nardo Road 18 19 0.2 Nardo Road to Balour Drive 12 12 0.0 Balour Drive to EL Camino Real 4 -182 Road and Section Traffic Volume Noise Level (000 ADT) (dB(A)) General Land Use Plan Plan A Buildout Saxony Road Encinitas Boulevard to Union Street 7 9 1.1 Union Street to Leucadia Boulevard 2 4 3.0 (two sections) 2 4 3.0 Leucadia Boulevard to Quail Gardens Drive 1 1 0.0 Quail Gardens Drive to La Costa Avenue 3 4 1.2 Quail Gardens Drive Encinitas Boulevard to Union Street 14 13 -0.3 Union Street to Leucadia Boulevard 11 11 0.0 (two sections) 11 11 0.0 Leucadia Boulevard to Saxony Road 3 3 0.0 Via Cantebria Encinitas Boulevard to Garden View Road 15 23 1.9 Garden View Road to Leucadia Boulevard 8 13 0.7 El Camino Real Santa Fe Drive to Encinitas Boulevard 43 44 0.1 Encinitas Boulevard to Mountain Vista Drive 56 57 0.1 Mountain Vista Drive to Garden View Road 58 63 0.4 Garden View Road to Olivenhain Road 57 58 0.1 Olivenhain Road to Calle Barcelona 47 50 0.3 Calle Barcelona to La Costa Avenue 1 42 1 0.2 [SIG] Means significant change in noise level. Source: Berry (1993) 4 -183 Table 4 -29 Noise Level Changes for With Northern Extension of Via Road and Section Specific Cantebria Traffic (000 Plan Land Into Carlsbad Volume ADT) Use Plan A Noise Level (dB(A)) General Land Use Plan Plan A Buildout Interstate 5 199 196 -0.1 South of Encinitas Boulevard 199 194 -0.1 Encinitas Boulevard to Leucadia Boulevard 200 200 0.0 Leucadia Boulevard to La Costa Avenue 196 196 0.0 North of La Costa Avenue La Costa Avenue 20 21 0.2 West of I -5 38 38 0.0 I -5 to Saxony Road 37 38 0.1 Saxony Road to El Camino Real 14 14 0.0 East of El Camino Real Calle Barcelona _ 8 -- El Camino Real to Via Cantebria 8 8 0.0 East of El Camino Real Garden View Road 8 8 0.0 East of El Camino Real Leucadia Boulevard 26 27 0.2 West of I -5 32 38 0.7 I -5 to Saxony Road 28 33 0.7 Saxony Road to Quail Gardens Drive 35 39 0.5 Quail Gardens Drive to Via Cantebria 35 27 -1.1 Via Cantebria to El Camino Real 47 49 0.2 East of El Camino Real Encinitas Boulevard 35 36 0.1 West of I -5 42 45 0.3 I -5 to Saxony Road 38 39 0.1 Saxony Road to Quail Gardens Drive 29 33 0.6 Quail Gardens Drive to Via Cantebria 26 26 0.0 Via Cantebria to El Camino Real 35 34 -0.1 East of El Camino Real Santa Fe Drive 31 32 0.1 West of I -5 16 17 0.3 I -5 to Nardo Road 18 18 0.0 Nardo Road to Balour Drive 12 12 0.0 Balour Drive to El Camino Real 4 -184 Road and Section Traffic Volume Noise Level (000 ADT) (dB(A)) General Land Use Plan Plan A BuiLdout Saxony Road Encinitas Boulevard to Union Street Union Street to Leucadia Boulevard (two sections) Leucadia Boulevard to Quail Gardens Drive Quail Gardens Drive to La Costa Avenue 7 2 2 1 3 9 4 4 1 4 1.1 3.0 3.0 0.0 1.2 Quail Gardens Drive Encinitas Boulevard to Union Street Union Street to Leucadia Boulevard (two sections) Leucadia Boulevard to Saxony Road 14 11 11 3 13 11 11 3 -0.3 0.0 0.0 0.0 Via Cantebria Encinitas Boulevard to Garden View Road Garden View Road to Leucadia Boulevard Leucadia Boulevard to Calle Barcelona CaLLe Barcelona to EL Camino Real 15 8 -- -- 24 15 12 14 2.0 1.0 SIG SIG El Camino ReaL Santa Fe Drive to Encinitas Boulevard Encinitas Boulevard to Mountain Vista Drive Mountain Vista Drive to Garden View Road Garden View Road to OLivenhain Road Olivenhain Road to Calle Barcelona Calle Barcelona to La Costa Avenue 43 56 58 57 47 42 43 55 60 54 39 43 0.0 -0.1 0.1 -0.2 -0.8 0.1 [SIG] Means significant change in noise Level. Source: Berry (1993) 4 -185 Table 4 -30 Internal Road Noise Contours for Specific Plan Land Use Plan A Road and Section Traffic Volume (000 ADT) Speed (MPH) Noise Level (dB(A) CNEL /Ldn) 70 65 60 Distance in Ft From Road CL Volume (MPH) Saxony Road South of Union Street 4 35 -- -_ 79 Quail Gardens Drive Encinitas Boulevard to Union Street Union Street to Leucadia Boulevard (two sections) Leucadia Boulevard to Quail Hollow Drive 13 11 11 3 35 35 35 35 -- -- -- -- 79 63 63 -- 251 199 199 50 Via Cantebria South of Garden View Road Garden View Road to Leucadia Boulevard 23 13 35 35 -- -- 125 79 398 251 Leucadia Boulevard Quail Gardens Drive to via Cantebria Via Cantebria to EL Camino Real 37 34 40 40 100 79 316 251 1000 794 Land Use Plan A With Northern Extension of Via Cantebria Into Carlsbad Road and Section Traffic Speed Noise Level (dB(A) CNEL /Ldn) Volume (MPH) (000 ADT) 70 65 60 Distance in Ft From Road CL Saxony Road South of Union Street 4 35 -- -- 79 Quail Gardens Drive Encinitas Boulevard to Union Street Union Street to Leucadia Boulevard (two sections) Leucadia Boulevard to Quail Hollow Drive 13 11 11 3 35 35 35 35 -- -- — -- 79 63 63 -- 251 199 199 50 Via Cantebria South of Garden View Road Garden View Road to Leucadia Boulevard Leucadia Boulevard to CBLLe Barcelona CaLLe Barcelona to El Camino Real 24 15 12 14 35 35 35 35 -- -- -- -- 125 79 63 79 398 251 199 251 Leucadia Boulevard Quail Gardens Drive to Via Cantebria Via Cantebria to EL Camino Real 39 27 40 40 100 63 316 199 1000 630 Source: Berry (1993) 4 -186 activity noise will decrease with implementation of other Specific Plan uses. Potentially significant noise sources associated with the regional commercial center are parking lot vehicle activity, roof mounted mechanical equipment, and delivery trucks. The magnitude of these sources will depend on the size and location of parking lots, types of stores, and types and number of delivery trucks. The same noise sources can be expected with commercial, office, and community use development in mixed use areas and the hotel /inn. Potentially significant noise sources associated with elementary schools and sports fields are vehicle traffic including buses, and outside human activity. Leucadia Boulevard Improvements Improvements to the existing section of Leucadia Boulevard will generally consist of widening to a four lane road with center median and left turn pockets. Urania Avenue and Saxony Road will be realigned to create more efficient intersections. Certain streets currently joining Leucadia Boulevard will be terminated in turning circle cul -de -sacs. Predicted future noise contours along the improved Leucadia Boulevard section generated by the FHWA computer model are listed in Table 4 -31. Corresponding post year 2010 noise levels for individual lots along the improved roadway are listed in Table 4 -32. The 60 dB(A) CNEL /Ldn contour will extend beyond the right -of -way into adjacent properties for the entire length of the improved section. Increases in noise from the existing condition range from 5 to 16 dB(A) CNEL /Ldn with the greater increases along the wider eastern segment of the roadway. Interior noise levels are not expected to exceed 45 dB(A). It is also noted that the traffic generated noise from the Specific Plan will not exceed 1 dB(A) when compared to the General Plan buildout condition and will not be detectable. Table 4 -31 Post Year 2010 Noise Contours for Leucadia Boulevard Improvement Section Road Section Traffic Noise Level (dB(A) CNEL /Ldn Volume (000 ADT) 70 65 60 Distance from Road CL (Ft) Interstate 5 to Saxony Road General Plan BuiLdout 32 79 251 794 Land Use Plan A 36 100 316 1000 Land Use Plan A With Extension of 38 100 316 1000 Via Cantebria Into Carlsbad Saxony Road to Sidonia Street General PLan BuiLdout 28 63 199 630 Land Use Plan A 31 79 251 794 Land Use Plan A With Extension of 33 79 251 794 Via Cantebria Into Carlsbad Source: Berry (1993) 'Results of noise barrier calculations along the improved roadway using the FHWA computer model are listed in Table 4 -33. Adequate attenuation is feasible on the north side of Leucadia Boulevard from Saxony Road to Sidonia Street, and on the south side from 895 Passiflora Avenue to Saxony Road. Noise levels can be reduced to 60 dB(A) CNEL /Ldn for outdoor residential recreational areas. This can be accomplished with six to 7 1/2 foot high solid barriers (block, frame and stucco, Woodcrete, etc.) with no gaps at the bottoms. In several locations such barriers will replace existing wood fences. At 902 and 903 Passiflora and 1103 ya 4 -187 Table 4 -32 post Leucadia Boulevard Parcel Address Number Year 2010 Improvement Distance to Road CL (Ft) Noise Levels for Section Noise Level (dB(A) CNEL /Ldn) General Land Use Plan A 254 - 552 -18 903 Oldham Court Plan Plan A With 69 254 - 522 -32 Buildout 93 Garden 69 69 254 - 553 -08 903 Passiflora Avenue View Rd 69 70 70 254 - 553 -21 Into 180 65 66 66 Carlsbad North Side Headinj East - Piraeus Street to Sidonia Street 69 254 - 060-14 636 Leucadia Boulevard 133 68 69 69 254 - 363 -16 660 Leucadia Boulevard 85 70 71 71 54- 363 -32 Greenhouse -- 254- 363 -33 Greenhouse -- 254- 363 -35 Realign Urania Avenue -- -- 254 - 362 -10 917 Urania Avenue 123 68 69 69 254 - 362 -12 To be removed -- 254- 362 -13 To be Removed -- 254- 362 -14 Greenhouse -- 254- 362 -46 To be removed -- 254- 362 -40 To be removed -- 254 - 362 -21 804 Leucadia Boulevard 132 68 69 69 254- 362 -38 To be removed -- 254- 362 -41 To be removed -- 254 - 362 -21 836 Leucadia Boulevard 93 69 70 70 254 - 362 -32 Greenhouse -- 254- 361 -01 To be removed -- 254 - 361 -02 915 Saxony Road 119 68 69 69 254 - 552 -07 912 St.Albans Drive 140 67 68 68 254 - 552 -08 906 St.Albans Drive 90 68 69 69 143 66 67 67 254 -552 -09 254 - 552 -17 911 SL.Albans Drive 904 Oldham Court 85 69 70 70 254 - 552 -18 903 Oldham Court 110 68 69 69 254 - 522 -32 902 Passiflora Avenue 93 68 69 69 254 - 553 -08 903 Passiflora Avenue 83 69 70 70 254 - 553 -21 1010 Guildford Court 180 65 66 66 4 - 553 -22 1002 Guildford Court 97 68 69 69 r25'4-553-23 4 - 553 -32 1003 Guildford Court 1103 Sidonia Street 97 98 68 68 69 69 69 69 4 - 200-04 1101 Leucadia Boulevard 73 69 70 70 4 -188 Parcel Number Address Distance to Road CL (Ft) Noise Level (dB(A) CNEL /Ldn General Plan Buildout Land Use Plan A Plan A With Garden View Rd Into Carlsbad South Side Heading West - Sidonia Street to I -5 256 - 232 -47 1089 Leucadia Boulevard 100 68 69 69 256- 232 -46 1081 Leucadia Boulevard 100 68 69 69 256- 232 -61 1071 Leucadia Boulevard 84 69 70 70 256- 232 -07 1037 Leucadia Boulevard 88 69 70 70 256 -232 -06 1027 Leucadia Boulevard 83 69 70 70 256- 232 -02 1021 Leucadia Boulevard 82 69 70 70 256- 232 -01 895 Passiflora Avenue 77 69 70 70 256- 231 -13 896 Passiflora Avenue 76 69 70 70 256- 231 -19 Vacant Lot -- -- -- 256- 231 -20 891 Eugenie Avenue 97 68 69 69 256- 231 -15 945 Leucadia Boulevard 95 68 69 69 256- 231 -21 895 Saxony Road 82 69 70 70 256- 164 -39 885 Leucadia Boulevard 80 70 71 71 256- 164 -01 893 Del Rio Avenue 77 70 71 71 256 - 163 -40 829 Leucadia Boulevard 104 69 70 70 256 - 163 -01 807 Leucadia Boulevard 85 70 71 71 256- 162 -40 777 Leucadia Boulevard 86 70 71 71 256- 162 -02 767 Leucadia Boulevard 98 69 70 70 256- 162 -01 755 Leucadia Boulevard 80 70 71 71 256 - 161 -40 To be removed -- -- -- 882 La Mirada 90 69 70 70 256- 161 -01 To be removed -- -- _- 865 Clark Avenue 95 69 70 70 256- 122 -06 675 Leucadia Boulevard 54 72 73 73 256 - 122 -05 Vacant Lot -- -- -- 256 -122 -04 Vacant Lot -- 256- 122 -61 i Holiday Inn 108 69 70 70 Source: Berry (1993) 4 -189 Table 4 -33 Representative Noise Barrier Characteristics for Leucadia Boulevard Improvement Section II Lot Address 912 St.Albans Drive 906 St.Albins Drive 911 St.Albins Drive 904 Oldham Court 903 Oldham Court 902 Passiflora Avenue 903 Passiflora Avenue 1010 Guildford Court 1002 Guildford Court 1003 Guildford Court 1103 Sidonia Street 895 Passiflora Avenue 896 Passiflora Avenue 891 Eugenie Avenue 945 Leucadia Boulevard 895 Saxony Road Road Barrier Base Barrier Distance Elevation Elevation Height (Ft) observer to (Ft) (Ft) Leucadia Boulevard - North Side 214 232 6.0 50 220 233 6.0 10 228 233 6.0 65 238 247 7.0 5 243 248 6.0 45 256 265 6.0 10 266 270 7.5 20 284 294 6.0 90 293 294 7.5 30 294 298 6.5 30 308 313 6.5 20 Leucadia Boulevard - South Side 266 269 8.0 14 253 258 8.0 10 238 244 7.0 33 229 235 6.5 32 214 215 8.0 20 Measured from duelling to barrier. Source: Berry (1993) 4 -190 Attenuated CNEL 57 60 58 60 60 60 60 56 60 60 60 60 59 59 60 60 Sidonia the barrier will have to wrap around the corners of the lots. It may also be possible to adequately attenuate the south side of the segment from 895 Passiflora to 895 Saxony Road by relocating driveways and constructing barriers from 6 1/2 to eight feet high. Adequate attenuation along both sides of the segment of Leucadia Boulevard from I -5 to Saxony Road will be of- doubtful effectiveness and may be aesthetically unacceptable. Calculations indicate that barriers along the roadway must be at least eight feet high to achieve meaningful noise reductions. Because most lots will have driveways connecting directly to the roadway, there will be gaps in the barriers which will severely degrade barrier noise attenuation. Further, barriers of this height are usually considered visually unpleasant, particularly where there is a long corridor with a jumble of walls and no walls. 4.11.3 MITIGATION MEASURES Construction Activities The City of Encinitas Municipal Code Sec. 9.32.410 (Noise Ordinance) regulates construction noise as follows: Except for emergency work, it shall be unlawful for any person, including the City of Encinitas, to operate construction equipment at any construction site, except as outlined in subsection (a) and (b) below: (a) It shall be unlawful for any person, including the City of Encinitas, to operate construction equipment at any construction site on Sundays and days appointed by the President, Governor, or City Council for a public fast, Thanksgiving, or holiday. Notwithstanding the above, a person may operate construction equipment on the above specified days between the hours of 10 a.m. and 5 p.m. in compliance with the requirements of sub - division (b) of this Section at his residence or for the purpose of constructing a residence for himself, provided such operation of construction equipment is not carried out for profit or livelihood. In addition, it shall be unlawful for any person to operate construction equipment at any construction site on Mondays through Saturdays except between the hours of 7 a.m. and 7 p.m. (b) No such equipment, or combination of equipment, regardless of age or date of acquisition, shall be operated so as to cause noise at a level in excess of seventy -five (75) decibels for more than 8 hours during any twenty -four (24) hour period when measured at, or within, the property which is developed and used, either in part, or in whole, for residential purposes. The Municipal Code Sec. 23.24.320 (Grading Ordinance) regulates the time of grading operations as follows: Grading and equipment operations within one -half (1/2) mile of a structure for human occupancy shall not be conducted between the hours of 5:30 p.m. and 7:30 a.m. nor on Saturdays, Sundays, and City recognized holidays. The City Engineer may, however permit grading or equipment operations during specific hours after 5:30 p.m. or before 7:30 a.m. or on Saturdays, Sundays, and City recognized holidays if he determines that such operations are not detrimental to the health, safety, or welfare of inhabitants of such a structure. Permitted hours of operation may be shortened by the City Engineer's finding of a previously unforeseen effect on the health, safety, or welfare of the surrounding community. 4 -191 Modern construction equipment properly used and maintained will comply with the above regulations. At completion of the project, all construction noise will cease and impacts reduced to a level of insignificance. specific Plan Comprehensive acoustical studies should be conducted by a qualified acoustician prior to site development involving sensitive receptors along circulation element roadways within the Specific Plan area. The studies should include the following: A description of the existing noise environment, future acoustical conditions, noise impacts, and recommendations to attenuate noise levels to within City standards. As a result of the studies, recommendations to adequately attenuate traffic noise levels may include setbacks and /or barriers such as block walls, frame and stucco �,ralls, Woodcrete, earth berms, or combinations thereof. The City of Encinitas Municipal Code (Performance Standards) Sec. 30.40 regulates noise levels for various sources other than traffic as follows: Every use shall be so operated that the noise generated does not exceed the following levels at or beyond the lot line and does not exceed the limits of any adjacent zone: Adjacent Zone One Hour Avera a Sound Level 7AMto10PM 10 PM to7AM RR,RR- 1,RR- 2,R- 3,R -5,R -8 50 dB 45 dB R- 11,RS- 11,R- 8,R- 20,R- 25,MHP 55 dB 50 dB OP,LLC,LC,GC,L- VSC,VSC 60 dB 55 dB L -I,BP 60 dB 55 dB Comprehensive acoustical studies should be conducted prior to site development involving commercial, office, school, community, and active recreational uses adjacent to sensitive receptors. The studies should include the following: A description of the existing noise environment, future acoustical conditions, noise impacts, and recommendations to attenuate noise le, -s to within City standards. As a result of the studies, recommendations to adequately attenuate noise levels may include setbacks and /or barriers such as block walls, frame and stucco walls, Woodcrete, earth berms, or combinations thereof as well as mechanical equipment enclosures and insulation. Subsequent comprehensive acoustical studies and implementation of rF:�ommendations therein will reduce identified significant traffic and other source noise impacts to levels of insignificance. Leucadia Boulevard Improvements Acomprehensive acoust_ cal study s]guld be,,priducted by a qualified acoustician prior to construction of Leucadia Boulevard improvements along the existing section. The study should be based on the final design for the roadway and include the following: 4 -192 A description of the existing noise environment, future acoustical conditions, noise impacts, and recommendations to attenuate noise levels to within City standards. As a result of the study, recommendations to attenuate traffic noise levels may include setbacks and /or barriers such as block walls, frame and stucco walls, Woodcrete, earth berms, or combinations thereof. The subsequent comprehensive acoustical study and implementation of recommendations therein will reduce identified significant traffic noise impacts to levels of insignificance in outdoor recreational areas for the north side of Leucadia Boulevard from Saxony Road to Sidonia Street and on the south side from 895 Passiflora Avenue to Saxony. Attenuation measures will not be adequate for any second story outside balconies within the noise impact contour. In addition, attenuation will not be adequate for the segment of Leucadia Boulevard from I -5 to Saxony Road. Noise impacts for these situations, and along this segment will be unmitigable to levels of insignificance. Because noise levels along the improvement section of Leucadia Boulevard would be significant and unmitigable for buildout of the General Plan without the Specific Plan no reasonable alternative is available to reduce impacts to insignificance. 4.12 AIR QUALITY An air quality analysis of the Specific Plan has been conducted by Woodward -Clyde Consultants (1993). The analysis includes a description of existing regulations, climate and meteorology, and air quality, as well as a discussion of the impacts of construction activities, traffic circulation, and energy consumption. Available mitigation measures for these impacts are also explored. A copy of the report, labeled Appendix H, is included with other technical appendices to this document. The following discussion is a summary of that report. 4.12.1 EXISTING CONDITIONS Regulatory Overview The Federal Clean Air Act (CAA) was enacted to protect and enhance the quality of the nation's air resources to benefit public health, welfare, and productivity and to promote the development and operation of state, regional, and local air pollution programs. Pursuant to the CAA the Environmental Protection Agency (EPA) established National Ambient Air Quality Standards (federal standards) for six pollutants known as "criteria pollutants." The pollutants include nitrogen dioxide (NO2), carbon monoxide (CO), particulates measuring 10 microns or less in size (PM�p), lead (Pb), sulfur dioxide (SO2), and ozone (03). The standards, listed in able 4 -34, represent the maximum level of background pollution acceptable to protect the public health and welfare. The California Clean Air Act established the California Ambient Air Quality Standards (state standards), which are stricter than the federal standards. Further, the state standards are broader with the addition of sulfates, hydrogen sulfide (H2S), vinyl chloride, and visibility reducing particulates. The state standards are also listed in Table 4 -34. Air quality in the San Diego County Air Basin (western portion) is administered by the California Air Resources Board (CARS) and the San Diego County Air Pollution Control District (SDCAPCD). Smog, a product of the photochemical reaction of organic compounds and oxides of nitrogen to form ozone, is the most serious air quality problem in the San Diego basin. Smog occurs because of local formation, and transport from the greater Los Angeles basin to the north. Peak concentrations of ozone result from the transported smog, and have decreased in severity over time because of controls in the Los Angeles area. However, levels of locally generated ozone continue to contribute to exceedances of both state and federal standards. Other criteria pollutants are problematic. Carbon monoxide concentrations have exceeded state and federal standards in downtown San 4 -193 Table 4 -34 Ambient Air Quality Standards Source: Woodward —Clyde Consultants (1993) 4 -194 Averaging Time 9 9 California National Pollutant Concentration Primar Secondary 1 Hour 0.09 ppmj (180 u /m ) 0.12 pp (235 u /m�) Same as Primary Ozone 8 Hour 9.0 m (10 �m ) 9.0 ppm3 (10 /m ) Same as Primary Carbon Monoxide 1 Hour 20 ppm3 (23 /m ) 35 ppm3 (40 /m ) Annual Average 0.053 pp (100 u /m�) Same as Primary Nitrogen Dioxide 1 Hour 0.25 p� (470 u /m) '- Annual Average -- 80 u /m3 -- Sulfur Dioxide 24 Hour 0.05 % (131 ug /m > 365 ug /m3 (0.14 ppm) -- 3 Hour -- -- 1300 ug /m3 (0.5 p m) 1 Hour 0.25 ppms (655 ug /m ) -- Suspended Particulate Matter Annual Geometric Mean 30 ug /m3 -- 24 Hour 50 u /m3 150 u /m3 Same as Primary (PM10) Annual Arithmetic -- 50 ug /m3 Mean Sulfates 24 Hour 25 u /m3 '- Lead 30 Day Average 1.5 u /m3 -- Calendar Quarter -- 1.5 ug /m3 Same as Primary Hydrogen Sulfide 1 Hour 0.03 pp? (42u /m) '- Vinyl Chloride (chloroethene) 24 Hour 0.010 py (26 ug /m ) -- Visibility Reducing Particles 1 observation Insufficient amount to reduce the prevailing -- visibility to less than 10 miles when the relative humidity is less than 70% Source: Woodward —Clyde Consultants (1993) 4 -194 Diego and Escondido. As a result, the air basin is designated as a carbon monoxide nonattainment area. Recently the basin reached attainment with the state one hour nitrogen dioxide standard after violations in 1987 and 1988. Under provisions of the CCA, SDCAPCD developed the Regional Air Quality Strategy (RAQS) to guide San Diego County, local municipalities, and other local agencies toward attainment of air quality standards. The original RAQS emphasized smog control while recent draft revisions strive for attainment for other criteria pollutants as well. Because both mobile source emissions (motor vehicles) and indirect source emissions (stationary energy consumption) are a significant impediment to meeting standards, the revised RAQS include transportation control measures and an indirect review program for new development. The final RAQS (expected publication August 1993) includes provisions to develop mobile and indirect source control measures. Mobile source control measures will include a vehicle trip reduction program, alternative transportation mode capacity expansion, and transportation system management. Climate and Meteorology The San Diego County climate is influenced by semipermanent high pressure systems located over the Pacific Ocean resulting in warm summers, mild winters, limited rainfall, and abundant sunshine. Temperature inversions occur in the region affecting atmospheric dispersive capacity and degrading local air quality. The inversion layer prevents dispersion of pollutants into higher layers of the atmosphere. The prevailing sunny days further degrade air quality by promoting formation of smog through photochemical reactions with pollutants trapped by the inversions. In addition to these subsidence inversions, radiation inversions which occur at night under calm and clear conditions reduce the vertical dispersion of pollutants. Another regional weather phenomenon known as "Santa Ana winds" also affect local air quality. These strong, hot, dry winds blow from the east and generally produce clear days. However, weak winds at the onset and breakdown of Santa Ana's circulate emissions from the Los Angeles basin west over the Ocean, south due to low pressure over Baja California, and east ashore into the San Diego basin. These conditions have become recognized as "transport" days. Air Ouality Air quality is a description of air pollution levels relative to federal and state standards. A region is designated in attainment for a particular pollutant if available air monitoring data have shown that the standards for that pollutant have not been violated. The most recent air quality designations and classifications for San Diego are those for the first quarter of 1993. There are three area classifications (moderate, serious, severe) based on the amount of time needed to attain the standards. The basin is currently in severe nonattainment of the federal standard and serious nonattainment of the state standard for ozone. San Diego was currently reclassified as "serious" because of the transport of ozone from the north. Areas designated as "serious" are expected to attain the standard by the end of 1997 in the absence of transport. Carbon monoxide concentrations have exceeded state and federal standards in downtown San Diego and Escondido, resulting in moderate nonattainment for the federal standard and nonattainment- transitional for the state standard. Because levels have not exceeded state or federal standards since 1989, the basin has met the criteria for reclassification as attainment. The federal nitrogen dioxide standard has been attained since 1981. There has been no exceedance of the state standard since 1988. San Diego is unclassified, but in attainment of the federal PM1 standard, and in nonattainment of the state standard. The air basin is in att9ainment with state and federal standards for both sulfur dioxide and lead. The closest air quality monitoring station to the project area is in Oceanside. Year 1991 ambient air quality data for this station is listed in Table 4 -35. Ozone concentrations exceeded state and federal standards for the reporting 4 -195 period. Lev te of ur ho federalestandard 4 Sea spray maysbena component of PM10 attainment of the the at she Allnotherspollutan s mmeasuredgatrOceansi.de wererbelowdboth project ar federal standards. There are many adverse health affects associated with criteria pollutants. Ozone causes eye irritation and respiratory function impairment. Carbon monoxide impairs oxygen transport in the bloodstream, increases carboxyhemoglobin, aggravates cardiovascular disease, impairs central nervous system functions, causes fatigue, and can be chronic lnlung hdiseaset and oincreasesclthed risk places. fatal Sulfur dioxide aggravates Table 4 -35 1991 Ambient Air Quality Data for Oceanside California I Averaging Time I Concentration Pollutant 0.16 ozone (ppm) 1 Hour Maximum 3.3 Carbon Monoxide (ppm) 8 Hour Maximum Nitrogen Dioxide (ppm) Annual Average 0.024 0.13 1 Hour Maximum Sulfur Dioxide (ppm) Annual Average 0.001 0.02 1 Hour Maximum 37/34 PM10 (ug /m3) Annual Average 81 24 Hour Maximum 1 Annual arithmetic mean /annual geometric mean. Source: Woodward -Clyde Consultants (1993) respiratory disease. Nitrogen dioxide increases the risk of respiratory disease. Lead impairs blood and nerve function and causes behavioral and learning problems in children. Finally, PM10 is respirable matter that could impair lung function. 4.12.2 ENVIRONMENTAL EFFECTS Air quality impacts are significant if emission thresholds established under SDCAPCD Rule 20.2 are exceeded. Although the thresholds were intended to distinguish between major and minor stationary sources of criteria pollutants such as industrial plants, they are also utilized for other indirect and mobile sources. The thresholds are 100 pounds per day for organic compounds, oxides of nitrogen, particulate matter, and sulfur dioxide. In addition, the three h forf an carbon monoxide is 550 pounds per day, and 9.0 parts per million (ppm) eight hour averaging time. Implementation of the Specific Plan will not result in serious deterioration of air quality over that expected with buildout of the Encinitas General Plan. However, there will be significant increases in certain criteria pollutants related to project construction activities and mobile sources. Construction Activities Specific Plan implementation, development of the Thornton property, and Leucadia Boulevard improvements will involve construction activities. Emissions associated with construction include exhaust from stationary and mobile equipment, vehicle exhaust from delivery trucks and workers cars or trucks, and 4 -196 onsite energy use. In addition there is fugitive dust from grading, other site preparation, wind erosion, and vehicle movement. Screening calculations based on the South Coast Air Quality Management District ( SCAQMD) procedures indicate that carbon monoxide, nitrogen oxides (NOx), and reactive organic gases (ROG) emissions will be well below significant levels. Fugitive dust, a portion of which is PM1 p, is likely to approach significant levels. Screening calculations estimate 110 pounds of PM1Q per acre of grading per day, which is in itself significant. The impacts will be short -term for the project buildout period, and occur in separate locations for sporadic time periods because of phasing. Mobile Sources According to the traffic study discussed in a previous subsection entitled Traffic, Specific Plan implementation will result in increases in traffic volumes over those expected for buildout of the Encinitas General Plan. There will be corresponding increases in vehicle miles traveled (VMT) in the project area and surroundings, and related increases in vehicle emissions. Calculated daily VMT based on affected roadway segment lengths and traffic study ADT•s are listed in Table 4 -36. Values are based on Land Use Plan A with the hotel /inn optional use because it will generate the most vehicle trips. The increase in VMT for Land Use Plan A is 16,430. With the extension of Via Cantebria into Carlsbad to connect with E1 Camino Real the increase is 71,180. Estimated resultant vehicle emissions from affected roadways based on SCAQMD composite emission factors best representing post year 2010 emissions are listed in Table 4 -37. Vehicle related emissions include exhaust during the "cold start ", "hot start ", "hot soak ", and running modes of vehicle operation. Vehicles in "cold start" mode are those started after being turned off for more than one hour. Additional associated emissions are evaporative losses of ROG due to running operation and diurnal temperature changes, and PM �o from tire wear on the roadway. Land Use Plan A with the extension of Via Cantebria into Carlsbad serves as the base for calculations because it results in the highest VMT. Increases in vehicle emissions in pounds per day are 1201.16 for CO, 60.47 for ROG, 85.58 for NOx, and 12.26 for PM 11 The increases in CO emissions are greater than 550 pounds per day and wi1Q be significant. A calculation of CO microscale emissions for E1 Camino Real gives an indication of localizied conditions on study area roadways during peak hours. E1 Camino Real will be the heaviest traveled arterial in the project vicinity. The 8 -hour level for E1 Camino Real under General Plan buildout will be 7.7 ppm. For the Specific Plan the 8 -hour level will be 8.0 ppm. With the Specific Plan and Via Cantebria extending into Carlsbad the level will be 7.7 ppm. These emission levels are below the 9.0 ppm 8 -hour standard and are not significant. stationary Sources Development of the Specific Plan area will result in an increase in consumption of both electricity and natural gas. Estimated criteria pollutants from energy consumption based on SCAQMD emission factors are listed in Table 4 -38. Energy consumption for Land Use Plan A with the hotel /inn optional use will be marginally lower than with the multi - family optional use. However, since air quality related impacts are dominated by vehicle trips this plan is used as the basis for calculations. Increases in stationary source emissions in pounds per day with Land Use Plan A are 10.01 for CO, 1.28 for ROG, 52.97 for NOx, 3.84 for SOx, and 0.66 for PM10. None of these increases are significant. Combined Sources Combined mobile and stationary source emissions in pounds per day with Land Use Plan A are listed in Table 4 -39. Increases with Land Use Plan A are 1211.17 for CO, 61.75 for ROG, 138.55 for NOx, 3.84 for SOx, and 12.92 for PM10. The increases in CO and NOx emissions are greater than 550 and 100 pounds per day respectively and will be significant. Mobile source emissions make the greatest contribution to the pollutant totals. Although the movement of vehicles is 4 -197 Table 4 -36 Vehicle Speed and Vehicle Miles Traveled Vehicle Vehicle Miles Traveled (VMT) Road Segment Speed (MPH) General Land Use Plan A Plan Plan A With Via Buildout (000) Cantebria (000) Into Carlsbad (000) La Costa Avenue 50 69.10 72.80 70.90 I -5 to EL Camino Real 45 37.35 37.35 37.35 EL Camino ReaL to Rancho Santa Fe Road 45 8 70 9 47 9.47 Rancho Santa Fe Road to Camino De Los Coches Highway 101 to Leucadia Boulevard 55 27.10 27.10 27.10 La Costa Avenue Vulcan /San ELijo Avenue 35 6.60 6.60 6,60 La Costa Avenue to Leucadia Boulevard 35 9.99 9.90 9.90 Leucadia Boulevard to Orpheus Avenue _ 35 13.20 13.20 13.20 Encinitas Boulevard to Santa Fe Drive 35 5.22 5'22 5.22 Santa Fe Drive to Birmingham Drive 25 3.84 3.80 4.60 Orpheus Avenue Saxony Road La Costa Avenue to Quail Gardens Drive 35 . 230 3.10 7.26 3.07 6.05 Leucadia Boulevard to Encinitas Boulevard 35 6.10 Quail Gardens Drive 25 3.90 3.90 3.90 Saxony Road to Leucadia Boulevard 25 6.10 7.30 21.84 Leucadia Boulevard to Encinitas Boulevard Via Cantebria ) 25 __ __ 12.70 EL Camino Real to Leucadia Boulevard 25 15.71 __ Leucadia Boulevard to Encinitas Boulevard 10.70 12.40 Leucadia Boulevard to Garden View Road 25 -- 20 80 21.80 Garden View Road to Encinitas Boulevard 25 Carle Barcelona 25 __ -- 2,64 Via Cantebria to EL Camino Real 25 11.40 11.40 11.40 EL Camino Real to Rancho Santa Fe Road Leucadia Boulevard 40 13.30 13.30 13.30 Vulcan Avenue to I -5 40 60.48 64.26 68.04 I -5 to EL Camino Real 35 10.60 7.91 10.55 Garden View Road 25 1 15.71 15.70 15.70 Mountain Vista Drive OLivenhain Road 40 51.60 1 53.80 53.80 EL Camino Real to Rancho Santa Fe Road Rancho Santa Fe Road OLivenhain Road 45 61.80 34.30 63.03 La Costa Avenue to OLivenhain Road to Encinitas Boulevard 35 49.40 46.93 49.40 Manchester Avenue Camino Real 35 16.50 16.50 16.50 Encinitas Boulevard to El 55 44.80 46.68 46.68 El Camino Real to I -5 EL Camino Real La Costa Avenue to OLivenhain Road 50 32.12 34.31 125.23 29.90 116.90 OLivenhain Road to Encinitas Boulevard 35 116.90 65.70 67.50 67.50 Encinitas Boulevard to Manchester Avenue 35 4 -198 Road Segment Vehicle Vehicle Miles Traveled (VMT) Speed (MPH) General Land Use Plan A Plan Plan A With Buildout (000) Via (000) Cantebria Into Carlsbad (000) Village Park Way Garden View Road to Encinitas Boulevard 25 5.30 5.30 5.30 Glen Arbor Garden View Road to Encinitas Boulevard 25 4.40 4.40 4.40 Encinitas Boulevard Vulcan Avenue to I -5 40 11.20 11.90 11.90 Quail Gardens Drive to EL Camino Real 40 37.80 42.00 40.60 El Camino Real to Village Park Way 40 20.20 20.20 20.20 Village Park Way to Rancho Santa Fe 45 23.92 23.92 23.92 Santa Fe Drive Vulcan Avenue to I -5 35 17.88 17.90 18.50 I -5 to EL Camino Real 35 21.92 21.92 21.92 Balour Drive Encinitas Boulevard to Santa Fe Drive 25 9.20 9.90 9.23 Cerro Street Encinitas Boulevard to EL Camino Real 25 2.60 2.60 2.60 Crest Drive Santa Fe Drive to Birmingham Drive 25 4.39 4.40 5.50 Total 924.33 940.76 995.51 1 Northern portion of segment corresponds to Via Cantebria extension into Carlsbad. Source: Woodward -Clyde Consultants (1993) 4 -199 Table 4 -37 Air Pollutants from Mobile Sources Pollutant (lbs /da ) Land Use Emission Source NOx PM10 CO ROG 2963.59 107.96 452.35 10.35 General Plan Runnin Exhaust and Eva orative Emissions Buildout 668.77 18.29 Cold Start Emissions 12.81 83.41 4.95 Hot Start Emissions -- -- Hot Soak Emissions -- 1.70 '- Diurnal Emissions -- -- 207.03 Tire Wear 3715.77 143.50 481.91 217.38 Total 3193.57 117.23 493.68 10.37 Land Use Running Exhaust and Evaporative Emissions -- Plan A 1484.94 40.61 37.18 With Cold Start Emissions 14.14 36.63 -- Via Cantebria Hot Start Emissions 238.42 Into -- 27.70 -- N Carlsbad Hot Soak Emissions -- -- 4.29 " Diurnal Emissions -- -- 219.27 Tire Wear 4916.93 203.97 567.49 229.64 Total Incremental Increases 1201 .16 60.47 85.58 12.26 Land Use Plan A Woodward -Clyde Consultants (1993) Source: Table 4 -38 Air Pollutants from Stationary Sources Pollutant (lbs /da ) Land Use Emission Source sox PM10 CO ROG NOx 2. 24 0. 59 10.36 Ne li ible 0.02 General Plan Gas Consum tion 2.78 0.62 Buildout 4.63 0.23 26.60 Electric Power 2.78 0 • �' 6.87 0•� 36.96 Total 1.55 26.45 Negligible 0•a' Land Use Gas Consumption 5.8'x' Plan A 11.04 0.55 63.48 6.62 1.24 With Via Electric Power Cantebria 16.88 in 89 93 6.62 1.30 Into Total Carlsbad Incremental Increases 10.01 1.28 52.97 3.84 0.66 Land Use Plan A Woodward -Clyde Consultants (1993) Source: 4 -200 responsible for the largest share of mobile emissions, it is the "cold start" mode that causes the significance incremental increases for CO, and to a lesser degree NOx. The higher frequency of "cold starts" is associated with increased intensity of land uses with the Specific Plan over that anticipated for buildout of the General Plan. Table 4 -39 Air Pollutants from Combined Sources Land Use Emission Source Pollutant (Lbs /day) CO ROG NOx Sox PM 10 General Plan Buildout Mobile 3715.77 143.50 481.91 -- 217.38 Stationary 6.87 0.82 36.96 2.78 0.64 Total 3722.64 144.32 518.87 2.78 218.02 Land Use Plan A With Via Cantebria Into Car d ba Mobile 4916.93 203.97 567.49 -- 229.64 Stationary 16.88 2.10 89.93 6.62 1.30 Total 4933.81 206.07 657.42 6.62 230.94 Incremental Increases Land Use Plan A 1211.17 61.75 138.55 3.84 12.92 Source: Woodward -Clyde Consultants (1993) Traffic Congestion Traffic circulation system deficiencies, particularly at intersections tend to generate high levels of localized vehicle emissions. Traffic congestion results in slow travel speeds, frequent acceleration and deceleration, and idling which result in increased exhaust pollutants. Elevated levels of CO are the most noticeable and often significant. As noted in the previous subsection entitled Traffic, there will be a number of intersections that will either become congested or have a worsening of congested conditions because of Specific Plan traffic. In the interim year of development there will be a deterioration in deficient conditions for three intersections. These are the north bound ramps of I -5 at Encinitas Boulevard, Saxony Road at La Costa Avenue, and E1 Camino Real at Olivenhain Road. Two other intersections will be caused to go deficient. They are Saxony Road at Encinitas Boulevard, and the Specific Plan commercial district access road. For the long -range circulation system there will be a deterioration in deficient conditions for two intersections. They are E1 Camino Real at La Costa Avenue and El Camino Real at Calle Barcelona. Two other intersections will be caused to go deficient. These are Saxony Road at La Costa and E1 Camino Real at Woodley Road. 4.12.3 MITIGATION MEASURES Construction Activities The City of Encinitas Municipal Code Sec. 23.24.400 (Grading Ordinance) regulates dry season work as follows: 4 -201 The permittee conducting any earth moving operations under this ordinance shall be responsible for controlling dust at all times. ,._ Provisions for dry season dust control should be included in the grading plan. ion ite Fugitive dust during cstruthe project, 11 constructionydusttwilleceasesand -- watering. completion impacts reduced to a level of insignificance. Mobile Sources tation Plan (SIP) and RAQS includes methods to control The State Implemen emissions of reactive organic gases from stationary sources to address nonattainment for ozone. Transportation control measures (TCM's) are developed to address mobile sources. Vehicle trip related air quality mitigation is categorized into S SMM ( are Mitigation Measures (SMM) and Best Available Mitigation Measures BAMM). typically applied to all projects, while BAMM represent a higher level of control where significant impacts are indicated. SMM measures target work and non -work vehicle trips to commercial referential.parking Examples for carpools and designs reBuAMM vehicle queuing, and p measures focus on land use plans with self contained neighborhoods, alternative transportation systems, mass transit rider incen iv e, incorporated a fleet vehicles. SMM and BAMM measures are, to a great Specific Plan design. The higher density residential uses are located near commercial areas, and mixed uses are emphasized to reduce vehicle trips and trip ads through the Plan illTensure the most efficient, area w non - congested City wide traffic Specific area w The significant contribution of criteria pollutants with the Sperci is Plan sof result of vehicles in ,cold start' mode because of g r development than anticipated with buildout of the General Plan. There are no "cold s mitigation measures available particular to tart" conditions. This impact cannot be reduced to a level of insignificance with a redesign of the Specific Plan to match the framework established by the General Plan. A detailed discussion of a specific plan in accordance with the framework is provided in the following section entitled Alternatives to the Proposed Action. Traffic Congestion Traffic system improvements are identified for all Specific Plan impacted intersections in the previous subsection entitled Traffic. The measures include additional lanes and /or signalization at affected intersections. These measures will adequately reduce traffic congestion, and in turn mitigate related localized increases in vehicle emissions to levels of insignificance. 4.13 PUBLIC FACILITIES AND SERVICES 4.13.1 EXISTING CONDITIONS Water Potable and reclaimed water service for the project area is presently, or will be provided by three special districts. District boundaries together with existing and proposed water transmission and storage facilities in the project area ovements are al relshown in Tables 4-40 4 andSele ted existing and proposed and vicinity impr San Dieguito Water District (map symbol - SDWD) The majority of the project area, except portions ar and the perimeter, planned i ter, is within Existing the San Dieguito Water District (SDWD). g the study area are presented in the recently completed San Dieguito Water 4 -202 District Water Master Plan (John Powell & Associates, 1990) and summarized as follows. The District currently delivers an average of 7.6 million gallons per day (MGD) of treated water on an annual basis. Demand is expected to grow to approximately 10.0 MGD by the year 2014. The most urgent current need is for increased treated water storage. The District is presently 0.9 MG short of storage to provide for diurnal peaking (operational storage) and fire flow requirements. Approximately 22 to 23 MG of additional treated water storage is recommended to be built to provide operational, fire flow, and two days emergency storage through the year 2014. Water distribution requirements at ultimate build out of the District are based on historical and existing use, peaking factors, and long -term land use policies. Future land use is based on the City of Encinitas 1989 General Plan Land Use Policy Map. Special consideration is given to existing agricultural lands in the District. Agriculture is not a general plan designated land use. Further, agriculture is a more water intensive use of land than low and medium density residential development. It is assumed that there will be a transition from agricultural use to urban use over time but the District position is that the water system should be sized to accommodate future agricultural operations on lands available for this use. Specifically, ultimate demand is based on the assumption that approximately 1170 acres of land in the District will be developed as agricultural land. Unit water demand for the approximate 667 acre Specific Plan area is estimated at 1667.5 acre feet per year (ACFT /YR), or 1.49 MGD. With a transition to urban uses ultimate demand in the District may be slightly less than predicted. Although reclaimed water may be available to the District in the future to off- set some demand, it will have no effect on reducing the size of future facilities. Several areas outside the District boundaries, including the balance of the Specific Plan area, may be served more readily by the District than by neighboring agencies. All potential boundary changes which would add to the District have been considered in ultimate demand projections. This correction accounts for roughly 0.25 MGD of the total ultimate demand. Improvements to satisfy ultimate water demand include existing pipe replacements and extensions, installation of loop systems, construction of mains, and construction of reservoirs and pump stations. Numerous of these improvements are identified within the project area, the most important of which are one or more new reservoirs. With development of agricultural areas for other uses, new distribution systems will also be necessary. A second 0 -6 MG reservoir is planned at the existing Wanket Reservoir site. Two reservoirs with capacities of 7.5 MG and 3 -8 MG are planned at a yet to be acquired Ecke site. Several capacity scenarios and nearby alternative locations, shown on Figure 4 -43, for these three reservoirs are under consideration. Site A has highest priority with favorable hydraulics, lowest pipeline cost, and two underground tanks. Site B has second priority with acceptable hydraulics, higher pipeline costs, and two underground tanks. Site C is third, with some hydraulic problems, and able to accommodate only one above ground tank. The other sites meet hydraulic needs but have other negative characteristics. Olivenhain Municipal Water District (map symbol - OMWD) Portions of the project area around the perimeter are within the Olivenhain Municipal Water District (OMWD). OMWD ultimate water demand projections and planned facilities for the Specific Plan area are based on both agricultural use and, though not specifically studied, general residential and commercial use. Demand projections for the Thornton property are based on its 1989 General Plan residential designation. The District has also anticipated that future agricultural use would ultimately be supplied with reclaimed water. Several areas outside the District boundaries in the Specific Plan area may be served more readily by the District than by neighboring agencies. 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N F W W u 3 � u � J 6 00 m v U C N U to tT q -4 $4 Q1 .4 C W N O� ON N U 0 m x a� b Q G) U $4 0 U) 4 -209 U) rr, 1 n O i o� N I U . ro D o � C) `� — z 7) lit; N rn N > D X -= a z V \ rn 7- rn I m 1 =�-0 I Darn I n N n Lp D ro Dx - T_ Drn r T I n rn - 1I A Lp pIrn_ o I N_ D Z D LEUCADIA BLVD (T1 Cn z cn rn ;. :j Q ti Z U, • rn ni C� N z m4 Figure 4 -43 Future Reservoir Alternative Sites Source: John Powell & Associates (1993) 4 -210 summarized as follows. The Wanket Reservoir site is located as an island in the Specific Plan area. The Wanket site was sized to accommodate two 3 MG reservoirs. The site currently supports one 3 MG reservoir which is a joint venture between the District and SDWD. Of the total volume, 2 MG are designated for District use with the remaining 1 MG designated for use by SDWD. Current analysis of remaining developable area in the District suggests that a total of approximately 5 MG will be required to service future development. If a future 6 MG reservoir contemplated by SDWD is to be used exclusively by SDWD the District would require assumption of 1 MG in the existing reservoir along with an additional 2 MG from the future reservoir. If this increased need has not been anticipated by SDWD a larger new reservoir may be necessary. Construction of a larger reservoir at the Wanket site could require additional property. The Wanket Reservoir site also accommodates a joint venture safety center. In the event of a larger new reservoir the safety center may have to be relocated. Existing plumbing in the Specific Plan area and off site pipelines are considered sufficient for existing demands. Future demand will require additional easement acquisition and extension of existing pipelines. San Elijo Joint Powers Authority (map symbol - SEJPA) The project area lies wholly within the San Elijo Joint Powers Authority (SEJPA) Reclaimed Water Service Area. The SEJPA intends to construct, own, and operate water reclamation facilities with the purveyors to be the existing water districts in the Service Area. For the project these would be SDWD and OMWD. Recently completed plans for water reclamation and distribution in the service area provided in the Conceptual Plan for Water Reclamation Facilities and Distribution System (Dudek & Associates, 1992) are summarized as follows. The SEJPA has proposed addition of water reclamation facilities including a storage reservoir and two pump stations at its San Elijo water pollution control facility in Cardiff by the Sea, and a distribution system to provide reclaimed water to various users within its service area. The water reclamation facilities would operate at the capacity required to meet reclaimed water demands anticipated at 2142.1 AF /YR, or 1.91 MGD. The identified market includes agriculture, I -5 landscaping, school and park landscaping, and golf courses. Transmission and distribution pipelines would be sized to meet reclaimed water peak day demands, anticipated to be 3.5 MGD. Demand for the Specific Plan area and certain adjacent properties (Use Designations 4G & 4H) totaling 793 acres, is estimated at 317.3 AF /YR or 0.28 MGD. Peak day demands would be 0.61 MGD. The SEJPA water reclamation distribution system includes numerous pipelines, pump stations, and two storage reservoirs. Pipelines and a pump station would be located in the Specific Plan area. Sewer Liquid waste disposal service for the project area presently is, or will be provided by two special districts. District boundaries together with existing and proposed sewer transmission facilities in the Specific Plan area, annexation area, and vicinity are shown on Figure 4 -44. Selected existing and proposed improvements are also listed in the previously presented Tables 4 -40 and 4 -41. Encinitas Sanitary District (map symbol - ESD) The south sector of the project area lies within the boundaries of the Encinitas Sanitary District (ESD). Existing and planned improvements provided in the recently prepared Encinitas Sanitary District Master Plan (Dudek & Associates, 1992) are summarized as follows. Ultimate flow in the District at buildout is estimated to reach approximately 8103 Equvalent Dwelling Units (EDU's) or 1.7 MGD. The Specific Plan area is within Subareas F and H with ultimate volumes projected to be about 1120 EDU's 4 -211 or 0.23 MGD and 1107 EDU's or 0.23 MGD respectively. Assuming that the basic framework for development of the Specific Plan area established by the General Plan was utilized for the projections, anticipated flow for the Specific Plan area totals 154.5 EDU's, or 0.03 MGD. The EDU's are derived from 120 dwelling units, 341.1 acres agricultural, and 5.0 acres open space uses. Distribution by zone is uncertain. Ultimate sewage flow estimates for District subareas are based on flow records and EDU unit flows projected from the City of Encinitas 1989 Land Use Policy Map and land use data presented in the City of Encinitas 1991 Traffic study. One EDU is equivalent to 208 gallons per day. District deficiencies to provide for ultimate peak flow conditions include a trunk sewer, several pipelines, and two pump stations in need of upsizing, rehabilitation, and replacement. Improvements have been identified to correct these problems. New transmission improvements will be necessary to provide service to development of agricultural areas. The District has capacity rights for the shared Batiquitos Pump Station and force main to the Encina Water Pollution Control Facility (WPCF) and depends on Encina for treatment and disposal of transmitted waste. Leucadia County Water District (map symbol - LCWD) The north and east sectors of the project area are outside the Leucadia County Water District (LCWD) current service area boundary and Sphere of Influence but within the District Ultimate Service Area. A summary of the existing and planned improvements provided in the eight year old Leucadia County Water District Planning Study (Engineering Science, 1985) follows. Ultimate flow projections for the entire District total 40,333 EDU's or 9.60 MGD. For the Specific Plan area and surroundings ultimate flow projections for Zone 4 total 2375 EDU's or 0.57 MGD while ultimate flow projections for Zone 9 total 10,221 EDU's or 2.43 MGD. Ultimate flow from the Specific Plan area is estimated at 865 EDU's or 0.21 MGD. Distribution by zone is uncertain. District service area flow projections are based on computerized analysis with inputs of land use categories in acreage, EDU /acre, percent buildout, and percent existing development. Ultimate population for the entire District is estimated at 96,000 people computed from land use plans with a discount factor averaging 70 percent of maximum allowable densities. Planned future development of the study area is based on ultimate land use in Zone 4 and Zone 9 (Drainage Basins) depicted by the San Dieguito Community Plan as amended in 1983. One EDU is equivalent to 238 gallons per day. District deficiencies to provide for ultimate peak flow conditions include a number of trunk sewers, pump stations, and force mains that will need to be replaced, improved, or paralleled. Improvements have been identified to rectify these problems. New transmission improvements will be necessary to provide service to development of agricultural areas. The District utilizes the Encina WPCF and LCWD Gafner Water Reclamation Plant (GWRP) for treatment and disposal of transmitted waste. The District assumes all additional treatment capacity will be obtained at Encina. Encina Water Pollution Control Facility As reported in the Encinitas Sanitary 1992) the Encina WPCF is a regional wastewater treatment plant located in Encina Joint Powers Authority (JPA). with the City of Carlsbad, City of Vallecitos Water District. District Master Plan (Dudek & Associates, secondary conventional activated sludge Carlsbad. The facility is owned by the JPA members include LCWD and ESD together Vista, Buena Sanitation District, and Total post Phase IV treatment capacity at Encina is 36 MGD for Unit I liquid and 38 MGD for Unit I solids and Unit J (ocean) disposal. Of this total LCWD has rights to 7.11 MGD (19.75 %) of Unit I liquid and 7.86 MGD (20.68 %) of Unit I solids and Unit J disposal. ESD has rights to 1.80 MGD (5%) of Unit I liquid and 1.80 MGD (4.74 %) of Unit I solids and Unit J disposal. The member agencies have 4 -212 agreed to make available up to five percent of their respective capacity shares for a reserve capacity pool. Solid Waste A solid waste disposal site for the project area and surrounding region is provided by San Diego County at its San Marcos Landfill in the City of San Marcos off Questhaven Road north of Encinitas. Summarized information on the landfill by Michael Brandman Associates (1990) is as follows. San Marcos Landfill is a Class III (nonhazardous wastes) landfill designed and permitted for approximately 140 acres of disposal area. The landfill receives approximately 2,800 tons (4,700 cubic yards) of solid waste daily from private waste haul trucks and private vehicles. Waste stream composition by refuse collection vehicles falls into 19 categories. Yard waste accounts for the largest percentage, or 22.2% of the total stream. Cardboard and other paper products account for 25.8 percent. Waste stream generation trends for the San Marcos Landfill service area are based on SANDAG Series 7 population projections and per capita generation rates for the cities of Carlsbad, Encinitas, Escondido, Oceanside, San Marcos, and Vista together with unincorporated communities of coastal North San Diego County, Pauma, Bonsall, Valley Center, and Fallbrook. Population projections indicate a 1.7% increase from years 1995 to 2000 for a total 695,994 persons in the service area. A 1.8% increase to a total of 831,856 persons is expected for years 2000 to 2010. Waste generation rates have shown percentage increases over time. Three scenarios based on stable rates of 1.96 and 2.60 tons per person per year, and a 5.0 percent annual increase in the total waste stream as population increases have been established. By the year 2000 the waste stream will reach 1,364,148 tons per year at the 1.96 rate, 1,856,222 tons per year at the 2.6 rate, and 1,758,101 tons per year at the 5.0 rate. By the year 2010 the waste stream will reach 1,598,144 tons at 1.96, 2,739,747 at 2.6, and 2,727,391 at 5.0. Although the landfill is near designed capacity at this time, permits for the first of a two phase expansion have been approved. The first phase is a vertical expansion raising the elevation of the existing waste deposits disposal area approximately 200 feet and increasing capacity by about 5.2 million tons. Phase two, if permitted, would involve horizontal expansion of approximately 56 acres adding another 2.8 million tons to the total capacity. Life span scenarios for the expanded landfill range from six to 15 years. All scenarios anticipate an operational recycling facility at the San Marcos site and new North County Landfill opening somewhere in the region. A pilot yard and wood waste diversion program is under way at the San Marcos Landfill. The wastes are ground for use as landfill cover, soil amendment, mulch, or biomass fuel. The program is expected to divert approximately 24,000 tons annually. A recycling facility has been permitted and is under construction at the landfill site. This facility is projected to recycle a minimum of 161,020 tons of solid waste material each year. The County is currently conducting siting studies for one or more new landfills in North County. The goal is to achieve at least 14 to 21 years of capacity at one site or up to 50 years of capacity by selecting three locations. Completion dates for site studies, site selection, and permitting are unavailable. Solid waste and recycle materials transport for the project and vicinity is provided by Mashburn Sanitation Company under contract with the City of Encinitas. The service is paid for by individual subscribers through direct billings to them by Mashburn at rates established by the contract. Utilities San Diego Gas & Electric Company Electric and natural gas service is provided to the project area and surrounding region by San Diego Gas & Electric Company (SDG &E). SDG &E has north to south major overhead power transmission lines (69KV, 138KV, 230KV) just east of E1 4 -214 Camino Real, one of which (69KV) branches west to the Encinitas Substation on Saxony Road near Encinitas Boulevard. There is an underground 12.75 inch gas main (Southern California Gas) in the Coast Highway with a 10 inch high pressure distribution line in Encinitas Boulevard. Smaller overhead and below ground electric transmission lines and below ground natural gas lines extend from the primary system to, and into the project area boundaries. Pacific Bell Telephone Company Telecommunication service is provided to the project area and surrounding region by Pacific Bell Telephone Company. Overhead and underground telephone cables extend to, and into the project area boundaries. There are other stable and mobile telephone facilities in the project vicinity. Times Mirror Cable Television Cable television service is provided to the project area and vicinity by Times Mirror Cable Television Company. Overhead and underground television cables extend to, and into the project area boundaries (Williams, 1993). Emergency Services Encinitas Fire Protection District The project area is wholly within the Encinitas Fire Protection District (EFPD) . Existing and planned facilities presented in the Encinitas Fire Protection District Strategic Plan (Encinitas Fire Protection District, 1992) are summarized as follows. Existing fire stations in the immediate vicinity of the project area are Station No. 1 (415 Second Street, Old Encinitas), Station No. 3 (801 Orpheus Avenue, Leucadia), and Station No. 4 (2011 Village Park Way, New Encinitas). A repair and maintenance facility is located at Station No. 3. The District utilizes six Type I fire engines, one Quint Truck, one Type III brush truck, and one heavy rescue unit. Additional equipment is available through an automatic aid agreement with five neighboring fire districts. District personnel include 15 captains, 15 engineers, 16 firefighters, and 24 reserves together with fire prevention and administrative staff. The recommended level of service for the District is one engine company for every 3.5 square miles, with a minimum service population volume of 8500 persons. Using this guideline the District is projected to achieve certain response time goals. The first is a first -in engine company response time of five minutes or less 80% of the time. The second goal is a second -in engine company response time of seven minutes or less 80% of the time. The last is a truck company response time of 10 minutes or less 80% of the time. Future equipment needs for the District based on population growth and response goals are two Type I fire engines. Supporting personnel needs are six each of captains, engineers, firefighters, and reserves together with additional fire prevention and administrative staff. Seven scenarios are presented for future facilities to meet needs over the next ten years. The scenarios involve up to three new fire stations in various combinations and locations. Of these, Scenario 3 includes a new station on north Via Cantebria in the Specific Plan Green Valley planning area. Emergency medical service is provided to the project area by District personnel and a private paramedic and ambulance company (Hartson Medical Service) contracted through a County Service Area (CSA 17). A summary of medical service as reported by Johns (1993) follows. The CSA 17 service area includes the cities of Encinitas, Solana Beach, and Del Mar as well as unincorporated locals of the coast and Rancho Santa Fe. Service includes two ambulance units with two paramedics each based at Scripps Memorial Hospital (Santa Fe Drive at I -5, Encinitas) and the Solana Beach Fire Station (On Nardo Avenue at Lomas Santa Fe 4 -215 Drive, Solana Beach). Backup is provided under an agreement with the fire districts in the service area. The contract is multi -year with monthly service reports and based on population growth and emergency call volume. There are two response time goals for an emergency medical technician /paramedic team. The first is to reach all areas of an urban neighborhood within 10 minutes for 90% of all emergency calls for assistance. The second goal is to reach all areas of a rural neighborhood within 20 minutes for 90% of all emergency calls. San Diego County Sheriff's Department Police protection is provided to the project area by the San Diego County Sheriff's Department under County jurisdiction from its Encinitas Substation on Via Molena near E1 Camino Real. Service to the area surrounding the project within the Encinitas City limits is also provided by the Sheriff's Department under a contract with the City. A summary of police service as reported by Cole (1993) follows. The current fiscal year contract is for 14 (7 day with relief) patrol units; 3 (7 day with relief) traffic units; 3 (5 day no relief) motorcycle units; 3.66 (5 day no relief) special purpose officers; and 3 (5 day no relief) community service officers. The Sheriff's Department has two goals for response time. The first is to reach all areas of a neighborhood within five minutes of a Priority One call for assistance. The second goal is to reach all areas of a neighborhood within seven minutes of a Priority Two call for assistance. Schools Encinitas Union Elementary School District The project area is entirely within the Encinitas Union Elementary School District (EUESD). The District currently has three elementary schools in the project vicinity. A description of these facilities as reported by Frederick (1993) follows. Paul Ecke Central School is located at 189 Union Street, in the Leucadia community. The facility was built in five phases between 1927 and 1975 and is in fair to good condition. Average enrollment is 515 students on a traditional track schedule. There are four relocatable (portable) classrooms on the site. Capri School is located at 941 Capri Road, in the Leucadia community. This facility was constructed in three phases from 1969 to 1975 and is in fair to good condition. Enrollment averages 576 students on a modified track schedule. There are four relocatable classrooms on the campus. Flora Vista School is located at 1690 Wandering Road, in the New Encinitas community. The school was built in 1975 and is in good condition. Average enrollment is 714 students on a year -round track schedule. Five relocatable classrooms are on the site. In the past District enrollment increased by some 50 to 60 students each year or in percentages of 1 to 1.5 annually. At present the overall enrollment is on a slight downswing. However, the number of kindergartners has increased over the last few years. Until the economy and real estate market begin a positive upswing, enrollment cannot be forecast for five and ten years in advance. The District Board of Trustees is considering re- construction of the Paul Ecke Central site. District staff is in the process of submitting an application to the State Board of Education for matching funds for this project. San Dieguito Union High School District The project area is wholly within the San Dieguito Union High School District (SDUHSD). There are two junior high schools and one high school in the project vicinity. A description of these schools provided by Hall (1993) follows. Oak Crest Junior High School is located at 675 Balour in the Old Encinitas community. This campus has a projected 1993 -94 enrollment of 1125 students. Capacity of permanent buildings on the site is 679. There are 23 portable classrooms to support 576 students expanding total capacity to 1255. Diegueno Junior High 4 -216 School is located at 2150 Village Park Way in the New Encinitas community. Projected enrollment for 1993 -94 is 1300 students. Permanent capacity is 987 with 19 portable classrooms boosting total capacity to 1471. San Dieguito High School is located at 800 Santa Fe Drive in the Old Encinitas community. Enrollment for 1993 -94 is projected at 2000 students. The permanent campus can support 1504 students. Thirty -three portable classrooms raise total capacity to 2303. The District currently owns a 50 acre parcel for a high school near Camino de Los Coches in south Carlsbad. Funds for the first phase have been secured and construction is expected to commence in late 1993. Funds for second phase construction are currently not available. Additionally, the District has identified a junior high school site south of Levante and north of Olivenhain Road in south Carlsbad (Arroyo La Costa). Funds are currently not available to either purchase the land, or construct the facility. MiraCosta Community College District The project area is entirely within the MiraCosta Community College District. A description of community college facilities in the north county region by Mullender (1993) follows. The San Elijo campus is located at 3333 Manchester Avenue in the community of Cardiff by the Sea. This facility is expected to complete a phased construction program to support approximately 6900 students by the year 2010. Total enrollment demand at the site in that horizon year based on SANDAG Series 7 growth projections is estimated at 7000. The Oceanside campus is located at One Barnard Drive in Oceanside. This facility is expected to double in size to meet a projected demand of 14,000 students by 2010. Subject to approval of necessary permits, additional buildings may be constructed at both San Elijo and Oceanside. Transportation North County Transit District North County Transit District (NTCD) provides public bus transportation to the project area and surrounding region (Wasdahl, 1993). There are two routes in the project area. Route 309 is a corridor route on E1 Camino Real from Camp Pendleton in Oceanside to Cardiff Town Center in Encinitas. Service is every 30 minutes weekdays from 5:57 AM to 8:57 PM and weekends form 8:28 AM to 11:00 PM. Route 361 is a local route providing bi- directional service to Cardiff, Encinitas, and Leucadia. This route operates on Leucadia Boulevard and other streets. Service is every 45 minutes weekdays from 5:30 AM to 8:00 PM, and Saturdays from 5:55 AM to 6:30 PM. NCTD is developing a commuter rail system to connect North San Diego County with the existing San Diego Metropolitan Transit District commuter light rail system known as the San Diego Trolly ( SANDAG, 1991). The former Atchison Topeka and Santa Fe Railway corridor along the coast will be utilized with stations in Oceanside, Carlsbad, Encinitas, Solana Beach, and North San Diego. Amtrak Amtrak operates eight passenger train round trips (San Diegan) on the coastal corridor tracks between Los Angeles and San Diego. Stations in the San Diego region are at Oceanside, Del Mar, and Center City San Diego. Amtrak will move its Del Mar stop to the Solana Beach NCTD commuter rail station upon its completion. 4.13.2 ENVIRONMENTAL EFFECTS Public service impacts are significant if water, sewer, utilities, or solid waste facilities capacity is exceeded. Impacts are also significant if fire, ambulance, or police facilities or response time standards are exceeded. 4 -217 Significant impacts to educational services occur if school district capacity is exceeded or a deficient condition exacerbated. Water Estimated water demands for the Specific Plan Land Use Plans are listed by land use type in Table 4 -42. It is assumed that the Thornton property has already been included in water district projections because of its previous 1989 Encinitas General Plan designation for single family use. The YMCA /Sports Park and Leaf properties are also not factored into the estimated demands as they are currently developed and being served. Values for calculation are from the recent SDWD Master Plan and OMWD demand criteria. San Dieguito Water District Specific Plan water demands within the District using SDWD values total 1,133.9 ACFT /YR, or 1.01 MGD for Land Use Plan A, and 1,101.1 ACFT /YR, or 0.97 MGD for Land Use Plan B. This compares favorably, and is less than District projections of 1,667.5 ACFT /YR, or 1.49 MGD for the Specific Plan area. It is apparent that Specific Plan water demands of up to 1,479.0 ACFT /YR, or 1.32 MGD for the entire Specific Plan area are also less than District projections if it were to ultimately serve this larger area. If the multi - family option is implemented in the Quail Hollow East and North Mesa planning areas water demand would increase in the OMWD by 0.04 MGD, boosting the total for the entire area to 1.36 MGD. This volume is still below the projected demand for the Specific Plan area alone. It is also noted that potential agricultural, golf course, and landscaping use of reclaimed water from the SEJPA would reduce ultimate Specific Plan demand for potable water considerably. Development of the project area will necessitate implementation of certain planned domestic water supply distribution improvements 9 require additional extensions of water pipelines beyond those existing or p_ :ned for. Three SDWD domestic water reservoirs are planned for the Specific P1 an area. Expansion of t.ne Wanket Reservoir site may be necessary and /or separate sites identified for these reservoirs. Of six alternate sites under consideration, the one with highest priority (Site A) would ccommodate two underground reservoirs at a location south of the existing Wanket site. This site is on the North Mesa ..anning area golf course and could be easily incorporated into the course. The cond priority site (Site B) is further south but also in the golf cc_rse area. _le third priority site (Site C) would be an above ground tank next to the existing above ground tank at the Wanket site. Clivenhain Municipal Water District Using OMWD values, Specific Plan water demands within the District total 0.51 MGD. If the optional multi - family use is implemented in the Quail Hollow East and North Mesa planning areas demand would rise by 0.04 MGD to total 0.55 MGD. If the hotel /inn optional use is implemented there would be a lesser increase of 0.01 MGD to total 0.52 MGD. Because District projections vary, demands may be higher than anticipated for the Specific Plan area. It is noted that potential golf course, park, and landscaping use of reclaimed water from the SEJPA would reduce ultimate potable water demand considerably. Development of the project area will necessitate implementation of certain planned domestic water supply distribution improvements and require additional extensions of water pipelines beyond those existing or planned for. Expansion of the Wanket Reservoir site may be necessary. The Specific Plan Phasing Plan will enable the District to incorporate Specific Plan demands into its planning process and ensure that capacity is available. San Elijo Joint Powers Authority Using SDWD criteria, Specific Plan agricultural reclaimed water demand is estimated at 0.34 MGD for Land Use Plan A including possible expansion of Quail 4 -218 N C ro E A 4J ro 3 ro w W N d' I d' 4 -219 r P N r M r P 00 M f' O O O r O O O N N O P O O O M J � v E � v In O O 00 d O O O N P J 10 'O O U� O r OC 0] .0 IT 10 N .t O P u'f P M ti J O N E\ N r M M M J C Si M C r M � U Q 9L d N C N C w% N It N N N N It N r v% N W F > LL V y M O In P N C^ M P P O O O too N u" Q r u E^ O r O r I O N M O O 00 O O O O P O O N � M o o o r 0 0 0 O O O O =0 r 0 0 0 0 0 41 0 v v N L N L ice1 �n OD 1O s r O In O P O W Y E\ < 10 M I� I- N P r �0 M 3 M 10 to r N I- Ln M r M 41 J r r M M r � m j v 3 d v 1 cL O y u y 7 O) �n N V N 1 I r Ln v! N E .O N �T N In N JN r N N C CW N vWi d N M P P P� I r �O �0 O N P M O 00 O N (j J %O 10 00 1 N r (p 00 O In P O O r O L �0 r- I,- r pn N v Q u v a v a � \ > > o o 0 N 0 0I in N 0 010 N N O In r N Ln � J W J W W W 41 J W 4J 4J a ° ° N a OC u `o CC F NL J .E � � N d W W E W t 7 ` W E W t u yLL LLu a+ •C O ~ u LL •u O 4 O V J d J 1 Ed .� O u 7 u W v- d 2 I v \ L E E LO t C V C L 41 V U V 1 H J N N S N (,7 Q Z 12 N E N 0 4 -219 y^ O N O O O u! cm 07 Ln Ln O Ln O p Ln p Lr% Ln to N N 7 D � d Q N r M r j v N ICO N CL N vt V ++ 1 C > D > O u 6 u Q u Q u C L (D N W J 10 pX N pn M In 00 O O O1 t O N O r 1 O r C^ d Q L v N co v Q 3 O/ 3 D E � � V Q C Q � \ � t C 00 N O r� N 1n O � N C 0/ M C � O1 O y v o w N CL w 0 u a, F Ef0 E Q N L u W '^ v O 4) u \ 'O C cm d J cn L V N C7 H C O .y C 10 a • x t_ L N L v vv u w �w l7 D D 3 � 3 C/) u O C C C O O O pot p d 12 L U) N (� J .r C O C O O 4 U •r 4+ E N W E � � r v � V 10 N u U U 0! 1Cp 7 1C1pp E u E O�CiD N M 4 -220 Botanical Gardens, and 0.28 MGD for Land Use Plan B. This demand compares favorably with SEJPA projections for 0.28 MGD for the project area. Specific Plan golf course use of reclaimed water could increase demand considerably. As an example, reclaimed water use by the Lomas Santa Fe golf courses in Solana Beach, with a total of 175 acres projected at a value of 2.1 AF /AC, would be 0.33 MGD. Comparable use by the Specific Plan course, with a total of 173.4 acres at 2.1 AF /YR, would be 0.32 MGD. This could bring demand up into the range of 0.60 to 0.67 MGD. Other future uses such as irrigating common landscaped banks would bring project demand even higher. Development of the project area will require consideration of certain planned reclaimed water supply distribution improvements and additional water pipelines beyond those planned for. Sewer Estimated wastewater flow for the Specific Plan is itemized by land use type in Table 4 -43. It is assumed that the Thornton property has already been included in sewer district projections because of its previous 1989 Encinitas General Plan designation for single family use. The YMCA /Sports Park and Leaf properties are also not factored into estimated flow because they are currently developed and being served. Values for calculation are from the recent ESD Master Plan and LCWD demand criteria. Encinitas Sanitary District Specific Plan wastewater flow within the District totals 1040.6 EDU's or 0.22 MGD for Land Use Plan A and 852.3 EDU's or 0.18 MGD for Land Use Plan B. These volumes are greater than District projections of 154.5 EDU's or 0.03 MGD, by 886.1 EDU's or 0.19 MGD for Land Use Plan A and 697.8 EDU's or 0.15 MGD for Land Use Plan B. Development of the project area will necessitate implementation-of certain planned wastewater transmission improvements and require additional extensions of pipelines. Because ESD ultimate development projections for wastewater flow from the Specific Plan area are lower than the flow estimated for the Specific Plan, additional improvements to the transmission system beyond those existing or planned for may be necessary. The Specific Plan Phasing Plan will allow the District to incorporate Specific Plan demands into its planning process and ensure that capacity is available. Leucadia County Water District Specific Plan wastewater flow within the District total 1644.0 EDU's or 0.39 MGD for both Land Use Plans A and B. These volumes are greater than District projections of 865.0 EDU's or 0.21 MGD by 779.0 EDU's or 0.19 MGD. If the optional multi - family use is implemented in the Quail Hollow East and North Mesa planning areas total flow would be higher at 1779.0 EDU's or 0.43 MGD. These volumes would be greater than projections by 914.0 EDU's or 0.22 MGD. If the hotel /inn optional use is implemented flow of 1670 EDU's or 0.40 MGD would be more than Land Use Plans A and B but less that the multi - family option. Development of the project area will necessitate annexation of portions of the Specific Plan into the District current service area as well as implementation of certain planned wastewater transmission improvements and require additional extensions of pipelines. Since LCWD ultimate development projections for wastewater flow from the Specific Plan area are lower than expected flows for the Specific Plan, additional improvements to the transmission system beyond those existing or planned for may be necessary. With the Specific Plan Phasing Plan the District will be able to include Specific Plan demands in its planning and ensure that capacity is available. 4 -221 m b E d A V 4) E 4-% tl) W M 1 d' QI .-I H 4 -222 W V 0 O M N •v ai L N W 7 E 0 C O O A N L 3 a L N W W 7 > C •� X cc to E t7 L O 10 u L W O •C m m U W 10 U 4J 41 90 O m C W O to w L 10 Y QO W N V C 10 W 07 0 O Lrl . p M �T to \r W N C N W O E 7 T N U N Q H M N M M 10 M O 10 0 00 �O O W N r r Ln 00 N N S 00 10 M 1 .•. M r M p o W � v m Y D Q O C C N N m N N N W N C \ \ N 1O O W L 7 W W T C = $ 7 Q u 0! Y O. N O O J F- d N Q a 10 O c M 00 000 N O O O O .W.. N O O O O O O W -•� J p Q p \ N U 6 U Q in N H 10 N Qp Y N pQ S Q O O ^ C c C 10 c t 7 h C M M M M 10 10 S M N O` N ~ N W a+ a N O� O r q a ao 'o 1 N t Y 7 r O O v N M Y L N Y' r o p L O a0 1 I o O� .0 o 10 O 00 10 O E S S. I r Vii r OC, m O 10 M on 10 7 p L Ip Ln M O r mr ►� r W Y > " L 4+ to N U) W c O U W Q Y C u = \ V \ O N Y N N y Q C N M W (n C r N 10 C C 0 V pQ QQ W �•. 7 r 0 2 > Q Q 8 n Q S U E d 10 L 7 O O F- W O Q 1 fn Q 7 = 0. N O O > \ \ p\ S M O O 0 0 W e- W N M NO O O O C G Al J J p Q S V) Y 6 6 p It N N 1 Y N pppp Q ►� C C O W L 7 r O N N ` C � �p �O $ 7 00 O. 00 ti ti W Y r 0, O r C Q W O .0 M r N �t d N Q Ln r O uco'� v17+ N 10 M W a NU O MW C L 7 U W W >1 Y ic + \ N Y a _ W u W W C w L ♦+ E8 L 0O d u v W u O 0 u0 tn t7 v C) FO -' J 4 -222 W V 0 O M N •v ai L N W 7 E 0 C O O A N L 3 a L N W W 7 > C •� X cc to E t7 L O 10 u L W O •C m m U W 10 U 4J 41 90 O m C W O to w L 10 Y QO W N V C 10 W 07 0 O Lrl . p M �T to \r W N C N W O E 7 T N U N Q H M N M Solid Waste Certain assumptions have been made to determine future waste stream from the project area. First, because the Thornton property has previously been designated for single family residential use in the 1989 Encinitas General Plan it has been included in population forecasts for San Marcos Landfill service area waste stream projections. Likewise, the YMCA /Sports Park leaf properties are developed, being served and assumed to be included in the projections. Finally, it is assumed that land use input from the City of Encinitas for the Specific Plan area based on the framework established by the General Plan is reflected in SANDAG Series 7 population forecasts and waste stream projections. Future Specific Plan contribution to the waste stream projections for the San Marcos Landfill service area have been calculated using the established per capita waste generation values (1.96 and 2.60 tons /person /yr), SANDAG Series 7 dwelling unit occupancy rates for the Encinitas General Plan population projections (2.52 persons /DU), and Specific Plan dwelling unit totals, less the 930 units previously anticipated for the area. Year 2010 waste generation for Land Use Plan A, with 320 DU or 806 persons, at the 1.96 rate will be 1580 tons. Generation for Plan A at the 2.60 rate will be 2096 tons. Year 2010 waste generation for Land Use Plan B, with 196 DU or 494 persons, at the 1.96 rate will be 968 tons. Generation for Plan B at the 2.60 rate will be 1284 tons. If the optional multi - family use in the Quail Hollow East and North Mesa planning areas is realized waste generation would be slightly higher. Plan A with 455 DU and 1147 persons at the 1.96 rate would generate 2248 tons. At the 2.60 rate Plan A would generate 2982 tons. Under Plan B with 331 DU and 834 persons at the 1.96 rate, 1635 tons would be generated. At the 2.60 rate Plan B would generate 2168 tons. If the hotel /inn option is implemented waste generation would be less than with Land Use Plans A and B. With Plan A, the additional waste generation represents a 0.09% increase in the 1,598,144 total year 2010 waste stream at the 1.96 rate and a 0.07% increase in the 2,739,747 total year 2010 stream at the 2.60 rate. With Plan B, the percentage increases are 0.06 and 0.04 respectively. Under the multi - family option in the Quail Hollow and North Mesa planning areas Plan A represents a 0.14% increase at the 1.96 rate and a 0.10% increase at the 2.60 rate. Plan B accounts for a 0.10% increase at the 1.96 rate and a 0.08% increase at the 2.60 rate. These 2010 Specific Plan totals represent a less than one percent increase in the service area waste stream and are neither expected to individually shorten the anticipated life span of the San Marcos Landfill nor that of any other future landfill site. Waste transfer service may need to be expanded as development occurs in the project area. Additional equipment and personnel will be added as necessary and the contract will be amended accordingly into the future to provide necessary service. Utilities San Diego Gas & Electric Company It is assumed that SDG &E relies on SANDAG growth forecasts and other information for projections of power demand into the future. The Specific Plan will result in an increase in residential and other uses over that previously reported for the area. Development of the project area will require extensions of electric lines and gas pipelines beyond those existing or planned for. The Specific Plan Phasing Plan will allow SDG &E to include Specific Plan demands in its planning and ensure that adequate electricity and natural gas is available. Pacific Bell Telephone Company It is assumed that Pacific Bell relies on SANDAG growth forecasts and other information for projections of telecommunications demand into the future. Because the Specific Plan will result in an increase in residential and other 4 -223 uses over that previously anticipated for the area there will be an increase in telephone service demand. Development of the project area will require extensions of telephone lines beyond those existing or planned for. With the Specific Plan Phasing Plan, Pacific Bell will be able to include Specific Plan demands in its planning and ensure that adequate telephone service is available. Times Mirror Cable Television The Specific Plan will result in an increase in residential and other uses over that previously anticipated for the area and a corresponding increase in cable television service demand. Development of the project area will require extensions of cables beyond those existing or planned for. The Specific Plan Phasing Plan will allow Specific Plan demands to be included in cable system planning and ensure adequate service availability. Emergency Services Encinitas Fire Protection District Planned additional fire operational resources will be necessary as development occurs in the project area. There may be a need for resources beyond that anticipated to serve the Specific Plan area. Specific Plan phasing will enable the District to include Specific Plan demands in District planning and ensure provision of adequate service. An EFPD fire station is being considered in the Green Valley planning area and a site may have to be accommodated. Such a site could easily be incorporated into the mixed use area of Green Valley. Additional medical operational resources, such as numbers of ambulance units and paramedics, may be necessary as development occurs in the project area. The County Service Area (CSA 17) contract will be amended accordingly into the future and necessary services provided. San Diego County Sheriff's Department Upon annexation to the City of Encinitas, police protection for the project area will continue to be provided by the San Diego County Sheriff's Department under a contract with the City. This contract will be amended as necessary to cover the services. Additional operational resources, such as numbers of traffic and patrol units, will probably be necessary as development occurs in the project area. The contract will be amended accordingly into the future and necessary services provided. Schools Encinitas Union Elementary School District It is assumed that the District has not included the project area in student demand projections for the future. Project demand for elementary school facilities has been calculated using District student generation rates of 0.39 per single family dwelling and 0.20 per multi - family dwelling. With Land Use Plan A there will be 322 students. Land Use Plan B will yield 313 students. If the optional multi - family use in the Quail Hollow East and North Mesa planning areas is implemented there would be 338 students with Land Use Plan A and 329 students with Land Use Plan B. If the optional hotel /inn land use is implemented there would be slightly fewer students than with Land Use Plans A and B. Development of the Thornton property will yield 47 students. The Leaf property is developed as residential and being served. District schools do not have permanent facility capacity to serve the project. The Specific Plan Phasing Plan will allow for identification and implementation of necessary facility improvements in a timely manner. A public elementary school site is provided in the Specific Plan area in the East Saxony planning area with Land Use Plan A and in the South Mesa planning area with Land Use Plan B. However, the location is subject to District approval and ownership has not been offered. 4 -224 San Dieguito Union High School District It is assumed that the District has not included the project area in projections of student demand into the future. Project demand for junior high school and high school facilities has been calculated using District student generation rates of 0.11 and 0.22 per dwelling unit respectively. With Land Use Plan A there will be 138 junior high school and 275 high school students. With Land Use Plan B there will be 124 junior high school and 248 high school students. If the optional multi - family use is implemented in the Quail Hollow East and North Mesa planning areas, Land Use Plan A would yield 153 junior high school and 305 high school students. For Land Use Plan B under this option there would be 139 junior high school students and 278 high school students. If the hotel /inn option is implemented there would be fewer students than with Land Use Plan A and B. The Thornton property will generate 14 junior high school and 27 high school students. District schools do not have permanent facility capacity to serve the project. The Specific Plan Phasing Plan will allow for identification and implementation of necessary facility improvements in a timely manner. MiraCosta Community College District Project demand for community college facilities has been calculated using District student generation rates of 0.05 of adult population and a factor of 2.0 adults per household. These are part -time students taking an average of about 6.5 college units per session. Because the District bases its projections on SANDAG Series 7, the Specific Plan dwelling unit base has been reduced by the 930 units anticipated for the area. It is also assumed that the Thornton and Leaf properties have already been accounted for in District projections. With Land Use Plan A there will be 32 students while with Land Use Plan B there will be 20. Under the optional multi - family use in Quail Hollow East and North Mesa planning areas there would be 46 and 34 for Land Use Plans A and B respectively. For the hotel /inn option there would be less students than with both Land Use Plan A and B. If all students were to take classes at the San Elijo campus the maximum project demand will represent a minimal 0.7% increase in projected enrollment. Transportation North County Transit District With development of the project area there will be an increase in transit facility use. The Specific Plan Phasing Plan will allow the District to plan for and provide additional transit routes and stops in a timely manner. Amtrak Development of the project area may result in an increase in Amtrak passengers. With phased implementation of the Specific Plan Amtrak can reasonably respond to demand in an orderly manner. 4.13.3 MITIGATION MEASURES Both SDWD and OMWD will require a hydraulic analysis of precise plans and /or individual entitlements such as tentative maps and use permits within planning areas prior to their implementation. In addition, the Districts require fees and /or necessary improvements at this stage. SEJPA may also require similar analysis, fees, and improvements. LCWD will annex portions of the Specific Plan into its current service area prior to providing sewer service. Both ESD and LCWD will require a flow analysis of precise plans and /or individual entitlements within planning areas prior to their implementation. Fees and /or improvements are also required at this stage. EFPD collects fire protection fees prior to implementation of individual entitlements. 4 -225 According to Government Code Section 53080 or Section 65970, EUESD and SDUHSD must either enter into an agreement with developers for fees on a square foot of living area basis, or land for a school site, to offset school facility impacts. If land is offered in lieu of fees the Districts must approve the site location. Because of the limited availability of state funds for school construction, the SDUHSD Board has adopted a policy requiring developers to offset the impact of new development on the District. Developers are required to work with the District and develop a school facility financing plan. The plan may include payment of school fees and /or participation in a future Mello -Roos district to generate fees to construct school facilities. The Specific Plan financing strategies include a Public Facilities Financing Program (Development Agreement). This program should include provisions for payment of a fair share of costs for infrastructure and other improvements required because of the Specific Plan. A water reservoir site should be selected by SDWD and OMWD as necessary prior to development of the golf course in the North Mesa planning area. A fire station site should be selected by EFPD as necessary prior to development of the Green Valley planning area. The location of the elementary school site should be approved by the EUESD prior to development in the East Saxony and South Mesa planning areas. District requirements together with the financing program and site selection measures will reduce identified impacts to public services to a level of insignificance. 4 -226 5.0 ALTERNATIVES TO THE PROPOSED ACTION 5.1 REDUCED EFFECTS ON SENSITIVE RESOURCES 5.1.1 CHARACTERISTICS Alternative land use plans for the Specific Plan have been prepared by T &B Planning Consultants which reduce effects on sensitive resources. Attention has been focused on withdrawal from sensitive Diegan sage scrub and southern maritime chaparral, and reducing steep slope encroachment. The redesign consists of Alternative Land Use Plans A and B, shown on Figures 5 -1 and 5 -2. Site grading would be in accordance with concept grading plans consistent with the grading shown underlying the land uses on the alternative plans. Land uses are summarized in Tables 5 -1 and 5 -2 with corresponding zoning classifications shown on Figures 5 -3 and 5 -4. All other provisions of the Specific Plan would apply to the alternative land use plans. The alternative land use plans differ from the Specific Plan Land Use Plans A and B primarily in the Quail Hollow East and North Mesa planning areas. Here the golf course and single family development would be pulled back further from the finger canyons in the northwest sector and away from the eastern bluff edge. Single family use would be replaced by multi - family use in the central sector west of Quail Gardens Drive. Except where crossed by Quail Gardens Drive, a linkage of natural vegetation would be maintained across the mesa top through the golf course. Another major change would be the deletion of the connection of Street A to Via Cantebria in the South Mesa planning area. With Alternative Land Use Plan A there would be a total of 1259 dwelling units. This would be nine units more than the Specific Plan Land Use Plan A, but 126 units less than Land Use Plan A with the optional multi - family use on the mesa. With Alternative Land Use Plan B there would be a total of 1170 dwelling units. This would be 44 units more than the Specific Plan Land Use Plan B, but 91 units less than Land Use Plan B with the optional multi - family use on the mesa. There would be an increase in open space of 39.3 acres with Alternative Land Use Plan A and 40 acres with Alternative Land Use Plan B, most of which would be natural area. The golf course would be reduced in size with both alternative land use plans by 21 acres while there would be an increase of a few acres of agricultural land. Land uses, acreage, dwelling unit counts, and square footage for the alternative land use plans would be essentially the same as the Specific PLan Land Use Plans A and B for the South Mesa, Sidonia East, West and East Saxony, Quail Gardens East, and Green Valley planning areas. 5.1.2 COMPARATIVE IMPACT ANALYSIS Reduced effects on sensitive resources is the preferred alternative and, except for no project, is considered environmentally superior to all other alternatives. The reduced effects alternative meets project objectives, and considerably lessens the environmental impacts of greatest concern. Hydrology and Grading A complete analysis of grading, hydrology, erosion, and water quality impacts of Alternative Land Use Plans A and B has been conducted by F.C. Springer & Associates (1993). A summary of the analysis focused on elements where there would be changes in significant impacts related to the Specific Plan Land Use Plans A and B follows. Decreases or increases in impacts for the alternative land use plans compared to Land Use Plans A and B are presented in brackets. In overview, the alternative land use plans would substantially reduce steep slope encroachment when compared to the Specific Plan Land Use Plans A and B. There would be a 55 percent reduction in encroachment into slopes with gradients of 25% or steeper. Steep slope encroachment at eight percent with both alternative land use plans would be within the 10 percent allowance for the site. There would be little change in total area of graded banks with heights of 30 5 -1 Table 5 -1 Reduced Effects on Sensitive Resources Alternative Land Use Plan A Summary Land Use Type Acreage Commercial /Office Duelling Unit Duelling Units (AC) Square Footage Density (DU) (SF) (DU /AC) Single Family Residential [total] [91.7] -- [3.2] [306] Single Family Residential 3.4 -- 0.7 3 Single Family Residential 69.5 -- 3.0 209 Sin le Famil y Residential 18.8 -- 5.0 94 MuLti-FamiLy Residential 8.0 -- 10.0 80 Mixed Use [total] [87.1] [220,000] [30.0] [873] Green Valley [total] [34.0] [50,000] [27.0] [502] Multi- Family Residential 18.4 -- 27.0 502 Commercial /Office 3.9 50,000 -- -- Church /School 11.7 -- -- -- East Saxony [total] [40.1] [145,000] [20.0] [208] Multi - Family Residential 10.8 -- 20.0 208 Commercial /Office 14.8 145,000 -- -- Quail Botanical Expansion 14.5 - -- -- West Saxony [total] [13.0] [25,000] [25.0] [163] Multi - Family Residential 6.5 -- 25.0 163 Commercial /Office 6.5 25,000 -- -- ELementary School 12.2 -- -- -- R ional Commercial Center 73.8 650,000 -- -- Golf Course (18 holes & club house) 152.4 -- -- -- A riculture 136.4 -- -- -- Ma dalena Ecke Community Park 29.8 -- -- -- Open Space [total] [218.9] -- Natural Areas 177.1 - -- -- Manufactured Slopes 12.5 -- -- ~ Trails 3.5 - -- ~ Encinitas Creek/Tributary 25.8 -- Roads (circulation element) 42.5 -- Specific Plan 852.8 870,0002 -- 1,259 Includes natural areas, manufactured slopes adjacent to roads, trails outside golf course, and drainage /detention areas. A 150 room hotel /inn will be permitted if a major use permit is approved pursuant to the Specific Plan in a portion of the North Mesa planning area. Source: T &B Planning Consultants (1993) 5 -2 Table 5 -2 Reduced Effects on Sensitive Resources Alternative Land Use Plan B Summary Land Use Type Acreage Commercial /Office Dwelling Unit Duelling Units (AC) Square Footage Density (DU) (SF) (DU /AC) Single Family Residential [total] [144.93 -- [2.93 [4251 Single Family Residential 3.4 -- 0.9 3 Sin le Family Residential 141.5 -- 3.0 422 MuLti-FamiLy Residential 8.0 -- 10.0 80 Mixed Use [total] [47.01 [75,0001 [30.01 [6653 Green Valley [total] [34.03 [50,0001 [27.01 [5021 Multi - Family Residential 18.4 -- 27.0 502 Commercial /Office 3.9 50,000 -- -- Church /School 11.7 -- -- -- West Saxony [total] [13.01 [25,0003 [25.01 [163] Multi- Family Residential 6.5 -- 25.0 163 Commercial /Office 6.5 25,000 -- -- ELementary School 10.1 -- -- -- Regional Commercial Center 73.8 650,000 -- -- Community Use 10.7 145,000 -- -- Golf Course (18 holes 6 club house) 152.4 -- -- -- A riculture 123.5 -- -- -- Ma dalena Ecke Community Park 29.8 -- -- -- Open Space [tota U [210.33 -- -- -- Natural Areas 169.7 -- -- -- Manufactured Slopes 12.5 -- -- -- Trails 2.3 -- -- -- Encinitas Creek/Tributary 25.8 -- -- -- Roads (circulation element) 42.3 -- -- -- Specific Plan 852.8 870,0002 -- 1,170 1 Includes natural areas, manufactured slopes adjacent to roads, trails outside golf course, and 2 drainage /detention areas. A 150 room hotel /inn will be permitted if a major use permit is approved pursuant to the Specific Plan in a portion of the North Mesa planning area. Source: T &B Planning Consultants (1993) 5 -5 ZONING MAP 3 ALTERNATIVE A ER•SFRi SINGLE FAMILY RESIDENTIAL 3.0 DU /AC MAXIMUM \ ER -SFR2 SINGLE FAMILY RESIDENTIAL 5.0 DU /AC MAXIMUM a S ER•MFR MULTI- FAMILY RESIDENTIAL 10.0 DUWC MAXIMUM f- l` ER•MUI MIXED -USE MIXED -USE o 1 FER-C COMMERCIAL FAG I AGRICULTURE OS OPEN SPACJ: I" ER -SFR , � � JER AG f1 ` R ..v �� R EfjMU2,, Figure 5 -3 Zoning Alternati% Q Land Use Plan A 5 -6 1� R L7 - ' AA Ulm Q �w- �� 5 -7 ZONING MAP ALTERNATIVE B EEEE3.0 FAMILY RESIDENTIAL 3.0 DU /AC MAXIMUM MULTI - FAMILY RESIDENTIAL ER•MFR 10.0 DU1AC MAXIMUM ER•MUI MIXED -USE ER•MU2 MIXED -USE ER•C COMMERCIAL FAG I AGRICULTURE OS OPEN SPACE t feet or more, and no change in total area of Encinitas Creek floodplain encroachment. There would also be little change in peak flow or water quality impacts. Hydrology and Water Quality Generally, peak flows would increase over the pre - development condition for both Alternative Land Use Plans A and B. Pre - development, post - development, and percent change in peak flow for each basin are listed in Table 5 -3. With both alternative land use plans there would be substantial increases in peak flow in the Quail Hollow East and northern North Mesa planning areas (Basins A [ +5 %], B [ -3%], C [ +3%]. Peak flow for the West Saxony, East Saxony, Quail Gardens East, and South mesa planning areas differs depending on uses under the two alternative land use plans. With Alternative Land Use Plan A peak flows would increase significantly in the northern East Saxony and Quail Gardens East planning areas (Basins H [ -3%] and K [ +l%]). With Alternative Land Use Plan B peak flows would increase substantially in the South Mesa planning area (Basin G [ +3%]). There would be new or substantially increased urban and nutrient pollutant sources for both Alternative Land Use Plans A and B. Changes in urban pollutant, sediment, and nutrient pollutant sources by basin are listed in Table 5 -4. There would be new or substantially increased urban and nutrient pollutant sources for both alternative land use plans in the Quail Hollow East and northern North Mesa planning areas (for urban pollutants Basins A, B, C [- 167 %], D [ +56%], E [ -5%]; for nutrient pollutants Basins A, B, C [- 288 %], D [ -16 %], E [ -2 %]). Water quality elements for the West Saxony, East Saxony, Quail Gardens East, and South Mesa planning areas differ depending on uses under the two alternative land use plans. With Alternative Land Use Plan A there would be new or substantial increased urban pollutant sources in West Saxony, East Saxony, Quail Gardens East (Basins H, J, and K [ +19$]). With Alternative Land Use Plan B there would be new urban pollutant sources in the South Mesa and Quail Gardens East planning areas (Basins G and H). In East and West Saxony there would be substantial increases in sediment sources, and substantial increases or new urban pollutant sources (for sediment sources Basins J [ -2 %] and K [ -3%]; for nutrient pollutant sources Basins J and K [ -7%]). Grading and Slope /Floodplain Encroachment There would be various localized areas throughout Alternative Land Use Plans A and B where graded banks exceed 30 feet in height. Locations are shown on Figures 5 -5 and 5 -6 with acreage by land use listed in Table 5.5. The largest graded area with high banks would be in Green Valley along Via Cantebria adjacent to the regional commercial center. About 7.2 acres of high banks [ +0.5 ac] would be found in this location with maximum heights to 70 feet [ -20 ft). The next largest areas with high banks, totaling 8.6 acres [ -1.4 ac] with Alternative Land Use Plan A and 8.2 acres [ -0.9 ac] with Alternative Land Use Plan B would also be associated with circulation plan roads. Grading encroachment into slopes with gradients of 25% or steeper for the alternative land use plans is shown on Figures 5 -7 and 5 -8 and itemized by use in the previously presented Table 5 -5. There would be a total 14.6 acre encroachment [- 17.8 ac] with Alternative Land Use Plan A and a total 14.3 acre encroachment [ -17.6 ac] with Alterative Land Use Plan B. Net encroachment, or the total less circulation plan roads, for both alternative land use plans would be 8.8 acres [ -15.8 ac for A; -15.9 ac for B], or 8% [ -16%]. The net encroachment for both alternative land use plans would be less than the 10% allowance for the site and not significant. Encroachment into the Encinitas Creek floodplain for the alternative land use plans is itemized by use in the previously presented Table 5 -5. Total floodplain area for both land use plans is 25.5 acres with the largest area of encroachment being recreational facilities and channel improvements on 16.3 acres [ +0.6 ac]. The next largest area is the regional commercial center occupying 7.3 acres. 5 -8 Table 5 -3 Reduced Effects Runoff Peak Flow Resources Alternative 5 -9 Pre - Development Post - Development Change Flow Peak Tributary Basin Planning Tributary Area Runoff Composite Ru Coeff composite Pent to M Designation Area Basin (AC) Coefficient c (C) (C) Land Use Plan A 0.40 0.47 +18 1 44.2 A 0.30 0.35 +17 B 1,2 23.8 +15 0.41 0.47 C 1,2 47.8 + 7 0.41 0.44 2 41.8 D 0.42 0.43 + 2 E 2,3 46.1 -16 53.0 0.55 0.46 F 2,3,7 0 137.1 0.40 0.40 G 7 0.45 0.51 +13 H 3,5,6,7 170.9 0 3.1 0.45 0.45 I 7 0.67 0.70 + 5 1 4,5 38.0 0.53 0.67 +26 K 4,5 56.6 +23 261.7 0.40 0.49 L g Land Use Plan B 0.40 0.47 +18 A 1 44 2 0.30 0.35 +17 B 1,2 23.8 0.41 0.47 +15 C 1,2 47.8 41.8 0.41 0.44 + 7 D 2 0.42 0.43 +2 E 2,3 46.1 0.55 0.48 -13 F 2,3,7 53.0 0.40 0.49 +23 G 7 137.1 0.45 0.50 +11 H 3,5,6,7 170.9 3.1 0.45 0.45 0 I 7 0.67 0.51 -24 � 4,5 38.0 56.6 0.53 0.47 -11 K 4,5 0.50 +25 g 261.7 0.40 L Springer & Associates (1993) Source: F.C. 5 -9 Table 5 -4 Reduced Effects on Sensitive Resources Alternative Water Quality Elements Tributary Basin Designation Planning Area Tributary Basin Area (AC) Change in Urban Pollutants Sources (%) Change in Sediment Sources Change in Nutrient Pollutants Sources Land Use Plan A A 1 44.2 NUNPS -22 NUNPS B 1,2 23.8 NUNPS -14 NUNPS C 1,2 47.8 + 889 -17 + 390 D 2 41.8 + 389 - 9 + 85 E 2,3 46.1 + 137 - 6 + 44 F 2,3,7 53.0 - 30 +13 + 27 G 7 137.1 0 0 _ 2 H 3,5,6,7 170.9 NUNPS -19 - 48 I 7 3.1 0 0 + 82 1 4,5 38.0 + 31 -36 NUNPS K 4,5 56.6 + 216 -44 - 43 L 8 261.7 NUNPS -36 - 63 Land Use Plan B A 1 44.2 NUNPS -22 NUNPS B 1,2 23.8 NUNPS -14 NUNPS C 1,2 47.8 + 889 -17 + 390 D 2 41.8 + 389 - 9 + 85 E 2,3 46.1 + 137 - 6 +-44 F 2,3,7 53.0 - 6 + 2 + 14 G 7 137.1 NUNPS -31 - 30 H 3,5,6,7 170.9 NUNPS -15 - 37 I 7 3.1 0 0 + 82 1 4,5 38.0 - 52 +61 NUNPS K 4,5 56.6 - 76 +15 + 68 L 8 261.7 NUNPS -37 - 64 CNUNPS7 Means new urban or nutrient pollutants sources. Source: F.C. Springer & Associates (1993) 5 -10 Table 5 -5 Reduced Effects on Sensitive Resources Alternative Grading Elements Land Use Type Area (AC) Encroachment of 25%+ Slopes (AC) Graded Banks with 30 Ft+ Height (AC) Encroachment of Encinitas Creek Floodplain (AC) Land Use Plan A Sin le Family Residential 97.7 1.7 2.5 0.0 MuLti-FamiLy Residential 8.0 1.3 0.7 0.0 Mixed Use 87.1 0.1 0.2 0.0 Elementary School 12.2 0.0 0.0 0.0 Regional Commercial Center 73.8 0.0 7.2 7.3 Golf Course 152.4 5.7 0.9 0.0 Agriculture 136.4 - 0.0 0.0 0.0 Community Park 29.8 0.0 0.0 0.0 Open Space 218.9 0.0 0.0 16.3 Roads (circulation element) 42.5 5.8 8.6 1.9 Total 852.8 14.6 20.1 25.5 Land Use Plan B Sin le Famil y Residential 144.9 1.7 2.1 0.0 MuLti-FamiLy Residential 8.0 1.3 0.7 0.0 Mixed Use 47.0 0.1 0.2 0.0 Elementary School 10.1 0.0 0.0 0.0 Regional Commercial Center 73.8 0.0 7.2 7.3 Community Use 10.7 0.0 0.0 0.0 Golf Course 152.4 5.7 0.9 0.0 Agriculture 123.5 0.0 0.0 0.0 Community Park 29.8 0.0 0.0 0.0 0 en S pace 210.3 0.0 0.0 16.3 Roads (circulation element) 42.3 5.5 8.2 1.9 Total 852.8 14.3 19.3 25.5 Source: F.C. Springer & Associates (1993) 5 -15 Roads encroach into 1.9 acres. Topographic Alteration and Visual Oualit Landform alteration would be considerably reduced with Alternative Land Use Plans A and B. The most noticeable location would be in the Quail Hollow East planning area where high banks would be reduced in area and encroachment of steep finger canyon areas lessened. A brief analysis of alternative land use plans landform alteration impacts follows. Decreases or increases in impacts for the alternative land use plans compared to the Specific Plan Land Use Plans A and B are presented in brackets. Various localized areas where graded banks would exceed 30 feet in height which have been identified for both alternative land use plans would be considered extensive. The largest contiguous area with high banks, about 7.2 acres [ +0.5 ac] would be in Green Valley along Via Cantebria. Next area would be the Leucadia Boulevard and Via Cantebria cuts through and along the bluff [reduced area] and Quail Gardens Drive in the Quail Hollow East planning area [reduced area]. There would also be two separate areas abutting the golf course and multi - family development in the Quail Hollow East and North Mesa planning areas [reduced area]. Biological Resources A complete analysis of the biological impacts of Alternative Land U- _• Plans A and B has been conducted by Sweetwater Environmental Biologists _993). The following discussion summarizes the analysis with a focus on elements where there would be changes in significant impacts related to Land Use Plans A and B. Decreases or increases in impacts for the alternative land use plans compared to the Specific Plan Land Use Plans A and B are presented in brackets. In overview, the alternative land use plans would considerably lessen direct impacts to sensitive biological resources compared to the Specific Plan Land Use Plans A and B. There would be a 16 percent reduction in impacts to Diegan coastal sage scrub with both alternative land use plans. With Alternative Land Use Plan A there would be a 12 percent reduction in total impacts to southern maritime chaparral. With Alternative Land Use Plan B the reduction in impacts to the chaparral would be slightly less at 10 percent. The difference is in indirect impacts between the alternative land use plans. Alternative Land Use Plan B has a smaller open space area in the South Mesa planning area resulting in impacts to an additional 1.7 acres of disturbed southern maritime chaparral. The impacts to southern riparian scrub with both alternative land use plans would be eliminated. For total impacts to sensitive ;:_.ant species Alternative Land Use Plan A would result in reductions of 61 percent to Del Mar mar.zanita, 72 percent to Del Mar sand aster, 25 percent to summer holly, seven percent to Nuttall's scrub oak, 29 percent to wart - stemmed ceanothus, and "8 percent to California adolphia. With Alternative Land Use Plan B the reductions would be slightly less to Del Mar manzanita (60 %), Del Mar sand aster (72 %), and wart - stemmed ceanothus (18 %). Vegetation Di-rect impacts to plant communities with Alternative Land Use Plans A and B would be the same. These impacts are shown on Figure 5 -9 and itemized in Table 5 -6. It is noted the alternative land use plans differ from the biological perspective only where an additional 84.6 acres of cultivated fields [ +4.6 ac], 0.1 acre of eucalyptus [ +0.1 ac], and one acre of ruderal vegetation [ +1.0 ac] would be converted to other uses with Land Use Plan B. The cultivated land would be used for a school and single family residences in the South Mesa planning area. The additional impacts to eucalyptus and ruderal vegetation would be because of a smaller open space area in the South Mesa planning area where it abuts the Quail Gardens East planning area. 5 -16 a) •.1 J-1 ro C. LI 0) J-1 rl 0i m u 7+ $4 $4 : ro O U) a vn m D N _4 a 4J >~ -.d E-4 to a) 0 !p .,.1 a ro 0� a, m o, ++ w u a) w b w a) W u u � H a to I Ln a! ri A ro Ea 5 -18 M rn rn ri m N 0 r♦ 0 4 ca r-I ro +-) a N f- d0 l- J 10 X 0 L L O O L O L S-1 O O O O O -4 U U N 01 U 19 U c LnOf` ma.��oM ca W to N fl • N J O O r• J 0� � r•e-Ln f�M Mtn a a a¢ a a a¢ 3 MM(CMMMMM 4-) C C C C C C C C J J J J J J IL CL CL. 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The individual impacts would not be significant because these communities are not sensitive. However, the cumulative loss of associated foraging habitat for raptors on a regional basis would be considered significant. Approximately 11.2 acres (23 %) of Diegan coastal sage scrub [ -7.0 ac] would be directly impacted. The loss would be mostly because of the single family development and the extension of Quail Gardens Drive in the northwestern Quail Hollow East and northern North Mesa planning areas. Of the total, 5.0 acres are California sagebrush dominated sage scrub. About 0.1 acre of this scrub is disturbed. Another 5.8 acres are lemonade -berry dominated sage scrub, 0.3 acre is laurel sumac dominated sage scrub, and less than 0.1 acres are black sage dominated sage scrub. This would be significant because sage scrub is the preferred habitat of the threatened coastal California gnatcatcher. About 20.6 acres (17 %) of southern maritime chaparral [ -13.6 ac], 1.3 acres of which is disturbed would be impacted. The loss would be primarily in the northeastern portion of the Quail Hollow East and northern North Mesa planning areas, and the extensions of Via Cantebria and Leucadia Boulevard through the bluff. Given the high quality of this community on the site, and the abundance of sensitive plant species which occur there, the loss would be significant. No southern riparian scrub would be impacted [ -1.0 ac]. Indirect impacts to vegetation with Alternative Land Use Plans A and B would be nearly the same, and are listed in the previously presented Table 5 -6. Alternative Land Use Plan B would indirectly impact an additional 1.7 acres of southern maritime chaparral because of a smaller open space easement in the South Mesa planning area. There would be approximately 3.9 acres of sage scrub [ -0.5 ac], and 15.7 acres of southern maritime chaparral [ +1.6 ac] impacted. The effects would be significant. No southern riparian scrub [ -0.4 ac] would be impacted. Sensitive Species Direct impacts to sensitive plant species are identical with both Alternative Land Use Plans A and B. These impacts are shown on Figure 5 -10 and itemized in Table 5 -7. Approximately 12 of the 56 populations (18 %) of Del Mar manzanita would be impacted [ -16 pop]. The loss amounts to 70 of the 1383 individuals (5 %) of this species on the site [ -67 ind]. About two of the 29 populations (7 %) of Del Mar sand aster would be impacted [ -7 pop]. Approximately 510 of the 6805 individuals (7 %) would be lost [ -1270 ind]. Approximately seven of the 35 populations (20 %) of summer holly would be directly impacted [ -1 pop]. About 99 of the 799 individuals (12 %) would be lost [ -10 ind]. The largest population contains 40 individuals in the Via Cantebria alignment near the bluff. These losses would not be considered significant. Thirteen of the 61 populations (21 %) of wart - stemmed ceanothus would be directly impacted [ -13 pop]. The loss amounts to approximately 130 of the 1244 individuals (10 %) on the site [ -67 ind]. About 75 individuals of a population of 100 .would be impacted by Leucadia Boulevard. Six of the 17 populations (35 %) of California adolphia would be directly impacted [ -5 pop]. Approximately 100 of the 578 individuals (17 %) of this species would be eliminated [ -113 ind]. Around 50 percent of one of the largest populations containing 100 individuals, and all of another population of 30 individuals would be lost to the golf course. These losses would not be considered significant. About 12 of the 35 populations (34 %) of Nuttall's scrub oak would be impacted [ -6 pop] . Included would be 239 of the 1188 individuals (20 %) of this species on the site [ -14 ind]. Of these, 75 individuals of a population of 80 would be eliminated by Via Cantebria while 60 individuals of a population containing 120 would be lost to Leucadia Boulevard. These impacts would be significant. 5 -19 Table 5 -7 Reduced Effects on Sensitive Resources Alternative Impacted Sensitive Plant Species Summary 1 For Land Use Plan A, 30 (27). 2 For Land Use Plan A, 100 (7Y.). 3 For Land Use Plan A, 123 (10%). 4 For Land Use Plan A, 362 (30%). 5 For Land Use Plan A, 159 (13%). 6 For Land Use Plan A, 289 (23 %). Source: Sweetwater Environmental Biologists (1993) Indirect impacts to sensitive plant species with Alternative Land Use Plans A and B would be nearly the same, and are listed in the previously presented Table 5 -7. Alternative Land Use Plan B would indirectly impact an additional 1.7 acres of chaparral because of a smaller open space easement in the South Mesa planning area. The impacts for Alternative Land Use Plan B are 33 individuals of Del Mar manzanita [ -89 ind], four individuals of summer holly [ -24 ind], 203 individuals of wart - stemmed ceanothus [ -5 ind], 37 individuals of California adolphia [ -78 ind], and 10 individuals of Palmer's grappling hook [ +10 ind]. These impacts would not be significant. Alternative Land Use Plan B would also indirectly impact 600 individuals of Del Mar sand aster [ +273 ind], and 125 individuals of Nuttall's scrub oak [ -13 ind]. The impacts to Del Mar sand aster would individually not be significant but when combined with direct impacts to these species onsite would be considered significant. The impacts to Nuttall's scrub oak would be significant. There would be no direct or indirect impacts to the coastal California gnatcatcher with Alternative Land Use Plans A and B (eliminated area]. Development would not encroach into the gnatcatcher occupied area and would leave a 50 foot buffer to the habitat. As to indirect impacts to sensitive animals, the alternative land use plans would retain a connecting link of natural vegetation on the mesa top between habitats to the east and west. Quail Gardens Drive would present a minor impedance to wildlife dispersal along the link because of its narrow width. With additional revegetation to widen this link it could serve as a viable wildlife corridor. General Plan Consistency Alternative Land Use Plans A and B would eliminate several inconsistencies with Encinitas General Plan goals and policies. A discussion of General Plan 5 -21 Total Individuals Direct Impacts Indirect Impacts Total Impacts Species 49 5 (10 %) 0 5 (10%) Encinitas baccharis 103 (7'/.)2 Del Mar manzanita 1383 70 (5%) 33 (2%)1 6805 510 (7'/.) 600 (9%) 1110 (16%) Del Mar sand aster 225 163 (72 %) 40 (18 %) 203 (90 %) Torrey Dine 799 99 (12 %) 4 (0%) 103 (13 %) Summer holl y %) 3 364 (31 %)4 Nuttall's scrub oak 1188 239 (20 %) 125 (11 1244 130 (10%) 203 (16 %)5 333 (27Y.)6 Wart- stemmed ceanothus California adol hia 578 100 0 7/.) 37 (6 %) 137 (24%) Palmer's grappling hook 550 0 (01/) 10 (2%) 10 (27) 1 For Land Use Plan A, 30 (27). 2 For Land Use Plan A, 100 (7Y.). 3 For Land Use Plan A, 123 (10%). 4 For Land Use Plan A, 362 (30%). 5 For Land Use Plan A, 159 (13%). 6 For Land Use Plan A, 289 (23 %). Source: Sweetwater Environmental Biologists (1993) Indirect impacts to sensitive plant species with Alternative Land Use Plans A and B would be nearly the same, and are listed in the previously presented Table 5 -7. Alternative Land Use Plan B would indirectly impact an additional 1.7 acres of chaparral because of a smaller open space easement in the South Mesa planning area. The impacts for Alternative Land Use Plan B are 33 individuals of Del Mar manzanita [ -89 ind], four individuals of summer holly [ -24 ind], 203 individuals of wart - stemmed ceanothus [ -5 ind], 37 individuals of California adolphia [ -78 ind], and 10 individuals of Palmer's grappling hook [ +10 ind]. These impacts would not be significant. Alternative Land Use Plan B would also indirectly impact 600 individuals of Del Mar sand aster [ +273 ind], and 125 individuals of Nuttall's scrub oak [ -13 ind]. The impacts to Del Mar sand aster would individually not be significant but when combined with direct impacts to these species onsite would be considered significant. The impacts to Nuttall's scrub oak would be significant. There would be no direct or indirect impacts to the coastal California gnatcatcher with Alternative Land Use Plans A and B (eliminated area]. Development would not encroach into the gnatcatcher occupied area and would leave a 50 foot buffer to the habitat. As to indirect impacts to sensitive animals, the alternative land use plans would retain a connecting link of natural vegetation on the mesa top between habitats to the east and west. Quail Gardens Drive would present a minor impedance to wildlife dispersal along the link because of its narrow width. With additional revegetation to widen this link it could serve as a viable wildlife corridor. General Plan Consistency Alternative Land Use Plans A and B would eliminate several inconsistencies with Encinitas General Plan goals and policies. A discussion of General Plan 5 -21 inconsistencies for Alternative Land Use Plans A and B follows, focused on changes in impacts related to the Specific Plan Land Use Plans A and B. Changes in impacts for the alternative land use plans compared to Land Use Plans A and B are presented in brackets. In overview, steep slope encroachment would be less than the allowance for the site making the plans consistent with goals and policies pertaining to steep slope and related resources preservation. Because of encroachment into the Encinitas Creek floodplain the alternative land use plans would be inconsistent with Land Use Policies 8.2, 8.5, and 8.6 and related Public Safety Policy 1.1 and Housing Policy 3.11 [eliminated inconsistencies due to steep slope, canyon, and sensitive habitat encroachment]. Also because of floodplain intrusion the alternative land use plans would be inconsistent with Resource Management Policies 4.9 and 9.9 [eliminated inconsistencies due to steep slope and sensitive habitat encroachment]. Other Resource Issues Alternative Land Use Plans A and B would result in a decrease in total dwelling units compared to the Specific Plan Land Use Plans A and B. The reductions would be 126 units for Alternative Land Use Plan A and 91 units for Alternative Land use Plan B. There would be a related reduction in traffic volumes on the order of up to 1260 ADT. The associated reduction in vehicle emissions both locally and in the basin would lower air quality impacts. Because of less development there would also be less demand for public services. However, these resource issue impacts would be significant. Impacts to other resource issues would be the same as those identified for the Specific Plan Land Use Plans A and B. 5.1.3 MITIGATION MEASURES All mitigation measures identified for the Specific Plan Land Use Plans A and B would be applied to Alternative Land Use Plans A and B except the measures for biology. Impacted vegetation mitigation requirements for Alternative Land Use Plans A and B are listed in Table 5 -8. Alternative Land Use Plan B differs from Land Use Plan A only for indirect impacts to an additional 1.7 acres of disturbed southern maritime chaparral in a buffer area. Mitigation for total impacts to Diegan coastal sage scrub would be 26.4 acres [ -14.0 ac]. There would be approximately 19 acres of disturbed areas available for replacement on the site [ +3 ac]. Offsite replacement and /or acquisition would be necessary for the balance of the mitigation requirement to achieve insignificance. Mitigation for total impacts to southern maritime chaparral with Alternative Land Use Plan B would be 54.1 acres [ -22.2 ac]. Offsite acquisition would be necessary but because of a net loss the impacts would remain significant. There would be no requirement for southern riparian scrub. Mitigation for other vegetation types would be the same as for the Specific Plan Land Use Plans A and B. Impacted sensitive plant mitigation requirements for Alternative Land Use Plans A and B would be the same. Del Mar sand aster would need to be replaced onsite by propagation at 1:1 or at least 1110 individuals. Impacts to Nuttall's scrub oak would have to be mitigated by offsite acquisition of southern maritime chaparral with substantial populations of these species to achieve insignificance. 5.2 DIFFERENT LEUCADIA BOULEVARD ALIGNMENT 5.2.1 CHARACTERISTICS Deletion of the Leucadia Boulevard extension through the bluff would eliminate grading and biological impacts associated with the roadway. However, there would be increased significant traffic circulation and air quality impacts if the road is deleted. Five circulation options, including deletion, were examined in detail in the Environmental Impact Report for the Encinitas General Plan (Cotton /Beland /Associates, 1988). It was determined that Leucadia Boulevard as 5 -22 Table 5 -8 Reduced Effects on Sensitive Resources Alternative Impacted Vegetation Mitigation Requirements Vegetation Type Direct Impact Replacement Ratios Indirect Impact Re lacement Ratios Mitigation Acreage 2:1 1:1 1:1 0.5:1 Diegan coastal sage scrub 11.1 0.1 3.8 0.6 26.4 Southern maritime chaparral 20.6 1.3 9.51 4.1 54.12 Southern willow riparian woodland 0.2 0.0 0.8 0.0 1.2 Southern willow scrub 0.0 0.8 0.0 0.0 0.8 Mulefat scrub 0.0 1.5 0.0 0.0 1.5 Coastal and valle freshwater marsh 0.0 0.4 0.0 0.0 0.4 Disturbed wetland 0.0 0.6 0.1 0.0 0.7 Total wetlands 0.2 3.3 0.9 0.0 4.6 Southern riparian scrub 0.0 0.0 0.0 0.0 0.0 1 For Land Use Plan A, 7.8. 2 For Land Use Plan A, 52.4. Source: Sweetwater Environmental Biologists (1993) a four lane roadway in the location shown on the current Circulation Plan will be essential for an efficient local and regional traffic circulation system. Four different Leucadia Boulevard bluff cut alignments have been identified for current study as follows. (1) Encinitas Road Standards (2) Scheme 1 (3) Scheme 2 (4) Scheme 3 Three of the alignments (1, 2 and 3) would be located to the south to maintain a larger contiguous block of habitat north of the roadway to Batiquitos Lagoon. The fourth alignment (4) is a variation of the Specific Plan alignment (Leedshill- Herkenoff), and would move the roadway slightly to the north to reduce impacts to sensitive plant species, particularly Encinitas baccharis. The first alignment (1), shown on Figure 5 -11, is based on exact compliance with Encinitas Public Road Standards. A 1400 foot minimum curve radius is required for Leucadia Boulevard. It will intersect with Via Cantebria and Quail Gardens Drive. A 1400 foot minimum curve radius is required for Via Cantebria as a Major Road and a 750 foot radius as a augmented Collector if reclassified. A 550 foot minimum curve radius is required for Quail Gardens Drive. The angle between centerlines of intersecting roads must be as nearly a right angle as possible, but never less than 70 degrees or greater than 110 degrees. The maximum grade at any intersection must be six percent. Where two road centerlines intersect, the lower classified road is not to intersect the primary road in a curve. Because the alignment would cut through the bluff diagonally it is immediately apparent that extensive grading would be necessary. There would be an associated considerable loss of sensitive Diegan coastal sage scrub and southern maritime 5 -23 .� . 11 Al: 4111 i I An. NN QN M -we WIN 5 -24 chaparral as well as numerous sensitive plants. Consequently, the alignment was rejected and not studied in detail. Two other southern alignments (2 and 3) have been designed by T &B Planning Consultants which are in general compliance with City standards and would reduce disruption to the bluff. These alignments would be responsive to localized biological constraints by being sited to minimize grading and avoid sensitive plants and habitat to the extent feasible for a functional roadway. The two alignments, known as Schemes 1 and 2, are shown on Figures 5 -12 through 5 -15. Corresponding land uses are summarized in Tables 5 -9 through 5 -12. Compared to the Specific Plan Land Use Plans A and B the major change in land uses with Schemes 1 and 2 would be on the mesa top and in Green Valley. With Scheme 1 the golf course on the mesa top would be located entirely to the north of Leucadia Boulevard rather than being on both sides of the roadway. Agricultural use would be situated to the south of Leucadia Boulevard. The regional commercial center in Green Valley would have a different configuration with a larger portion to the north of Leucadia Boulevard. With Scheme 2 the golf course would be located north and south of Leucadia Boulevard. Agricultural use would be situated on both sides of Leucadia Boulevard with and entirely south of the roadway with Plan B. With Scheme 1 there would be a total of 834 dwelling units for Plan A and 735 dwelling units for Plan B. This represents reductions of 416 and 391 units respectively compared to the Specific Plan Land Use Plans A and B. With Scheme 2 there would be a total of 823 dwelling units for Plan A and 679 dwelling units for Plan B. Reductions in units compared to the Specific Plan Land Use Plans A and B would be 427 and 447 respectively. There would be even greater reductions for both schemes when compared to Land Use Plans A and B with the optional multi- family uses. A fourth alignment (4) for Leucadia Boulevard known as Scheme 3 and shown on Figure 5 -16, has been prepared by O'Day Consultants (1993). This alignment would be similar to that for the Specific Plan (Leedshill - Herkenoff) but would be located slightly to the north to reduce bluff cut grading and particularly, to avoid Encinitas baccharis. A portion of the center line would be on the north property boundary placing the west bound lanes and right -of -way offsite in the City of Carlsbad. The alignment would not result in land use changes in Land Use Plans A and B or the resource sensitive alternative. 5.2.2 COMPARATIVE IMPACT ANALYSIS Comparative analysis of resource issues of concern for the various Leucadia Boulevard alignments is inconclusive. Grading impacts are similar and all alternatives would result in noticable landform alteration. There would be impacts to sensitive vegetation and sensitive plants, as well as habitat fragmentation with all alternatives. Hvdrolocry and Grading An analysis of grading impacts of the different Leucadia Boulevard alignments has been conducted by F.C. Springer & Associates (1993). The areas of steep slope ( >25%) encroachment, area of graded banks higher than 30 feet, and maximum graded bank height for each alignment are listed in Table 5 -13. The various alignments were provided at different scales and /or were designed with different degrees of detail. In order to fairly assess impacts, the Specific Plan Leedshill - Herkenoff precise alignment was compared to the Specific Plan T &B alignment for Land Use Plan A to determine a gross to net correction factor to apply to Schemes 1 and 2. Scheme 3 is directly comparable to the Leedshill - Herkenoff version. Scheme 1 would have the least steep slope encroachment at 0.7 acres, the smallest area of banks 30 feet or greater in height with 3.4 acres, and the lowest maximum bank height at 51 feet. The other alternatives would have slightly greater grading impacts which would differ little from each other. Of the other 5 -25 7-7- \` Figure 5 -12 Alternative Leucadia Boulevard Alignment Scheme 1 Plan A Source: T &B Planning Consultants (1993) 5 -26 I 1,. r '1 I i� I I �J �1 Q 5 -27 r Z r m li 1' - z �4r i ,- to ----- �J Figure 5 -14 Alternative Leucadia Boulevard Alignment Scheme 2 Plan A Source: T &B Planning Consultants (1993) 5 -28 l; CIP \) ;� f _ � a 11, Figure 5 -15 Alternative Leucadia B Q Alignment Scheme 2 Pla 5 -29 Table 5 -9 Different Leucadia Boulevard Alignment Alternative Scheme 1 Plan A Summary Land Use Type Acreage Commercial /Office Dwelling Unit Dwelling Units (AC) Square Footage Density (DU) (SF) (DU /AC) Single Family Residential [totaL3 [116.11 -- [3.23 [3763 Single Family Residential 4.3 -- 0.7 3 Single Family Residential 93.1 -- 3.0 278 Sin Le Famil y Residential 18.7 -- 5.0 94 Mixed Use [totaL3 [68.93 [220,0003 varies [4583 Green Valley [totaL3 [16.23 [50,0003 [30.03 [873 Multi - Family Residential 2.9 -- 30.0 87 Commercial /Office 2.8 50,000 -- -- Church /School 10.5 -- -- -- East Saxony [totaL3 [39.73 [145,0003 [20.03 [2083 Multi - Family Residential 10.4 -- 20.0 208 Commercial /Office 14.8 145,000 -- -- 9uaiL BotanicaL Expansion 14.5 -- -- -- West Saxony [totaL3 [13.03 [25,0003 [25.03 [1633 Multi - Family Residential 6.5 -- 25.0 163 Commercial /Office 6.5 25,000 -- -- ELementary School 12.1 -- -- -- Re ionaL Commercial Center 97.1 650,000 -- -- Golf Course (18 holes & club house) 167.8 -- -- -- A riculture 142.3 -- - -- Ma dalena Ecke Community Park 29.8 -- - -- 0 en S acel 175.9 -- -- -- Roads (circulation element) 42.8 -- -- -- Specific Plan 852.8 870,000 1.0 834 1 Includes natural areas, manufactured slopes adjacent to roads, drainage detention areas, trails outside golf course, and Linear green belt along EL Camino Real. Source: T &B Planning Consultants (1993) 5 -30 Table 5 -10 Different Leucadia Boulevard Alignment Alternative Scheme 1 Plan B Summary Land Use Type Acreage (AC) Commercial /Office Square Footage Dwelling Unit Density Dwelling Units (DU) (SF) (DU /AC) Sin le Famil y Residential 161.9 -- 3.0 485 Mixed Use [total] Green Valley [total] Multi - Family Residential Commercial /Office [29.2] [16.2] 2.9 2.8 [75,000] [50,000] -- 50,000 varies [30.0] 30.0 -- [250] [87] 87 Church /School West Saxony [total] Multi - Family Residential Commercial /Office 10.5 [13.0] 6.5 6.5 -- [25,000] -- 1 25,000 -- [25.0] 25.0 -- -- [163] 163 -- ELementary School 10.0 -- -- -' RegionaL Commercial Center 97.1 650,000 -- -' Community Use 17.2 145,000 -- -- Golf Course (18 holes & club house) 167.8 -- -- -- A riculture 126.0 -- '- -- Magdalena Ecke Community Park 29.8 -- Open Space 1 171.2 -- -- -- Roads (circulation element) 42.6 -- -- -- Specific Plan 852.8 870,000 0.9 735 1 Includes natural areas, manufactured slopes adjacent to roads, drainage detention areas, trails outside golf course, and linear green belt along EL Camino Real. Source: T &B Planning Consultants (1993) 5 -31 Table 5 -11 Different Leucadia Boulevard Alignment Alternative Scheme 2 Plan A Summary Land Use Type Acreage Commercial /Office Duelling Unit Duelling Units (AC) Square Footage Density (DU) (SF) (DU /AC) Single family Residential [total] [117.57 -- [3.27 [3807 Single Family Residential 4.3 -- 0.7 3 Single Family Residential 94.5 -- 3.0 282 Sin le Famil y Residential 18.7 -- 5.0 94 Mixed Use Etota U [68.0] [220,000] varies [443] Green Valley [total? [15.37 [50,000] [30.0] 1723 Multi - Family Residential 2.4 -- 30.0 72 Commercial /Office 2.4 50,000 -- -- Church /School 10.5 -- -- -- East Saxony EtotaL] [39.71 [145,000] [20.0] [2081 Multi - Family Residential 10.4 -- 20.0 208 Commercial /Office 14.8 145,000 -- -- QuaiL BotanicaL Expansion 14.5 -- -- -- West Saxony [tota U 113.03 [25,0001 [25.0] [163] Multi - family Residential 6.5 -- 25.0 163 Commercial /Office 6.5 25,000 -- -- ELementary School 12.1 -- -- -- RegionaL Commercial Center 101.9 650,000 -- -- Golf Course (18 holes & club house) 173.3 -- -- -- AciricuLture 134.8 -- -- -- Ma dalena Ecke Community Park 29.8 -- -- -- Open S acel 176.8 - -- -- Roads (circulation element) 38.6 -- -- -- Specific Plan 852.8 870,000 1.0 823 1 Includes natural areas, manufactured slopes adjacent to roads, drainage detention areas, trails outside golf course, and linear green belt along El Camino Real. Source: T &B Planning Consultants (1993) 5 -32 Table 5 -12 Different Leucadia Boulevard Alignment Alternative Scheme 2 Plan B Summary Land Use Type Acreage (AC) Commercial /Office Square Footage Dwelling Unit Density Dwelling Units (DU) (SF) (DU /AC) Single Family Residential [total] Single Family Residential Sin le Family Residential [151.61 4.3 147.3 -- -- -- [2.9] 0.7 3.0 [4441 3 441 Mixed Use [total] Green Valley [total] Multi - Family Residential Commercial /Office [28.31 [15.31 2.4 2.4 [75,0001 [50,0001 -- 50,000 varies [30.0] 30.0 -- [2351 [727 72 -- Church /School West Saxony [total] Multi - Family Residential Commercial /Office 10.5 [13.01 6.5 6.5 -- [25,0001 -- 1 25,000 -- [25.01 25.0 -- -- [1631 163 -- Elementary School 10.0 -- -- R ional Commercial Center 101.4 650,000 -- Community Use 17.2 145,000 -- -- Golf Course (18 holes & club house) 177.1 -- -- A riculture 126.0 -- -' -- Ma dalena Ecke Community Park 29.8 -- -- -- Open Spacel 168.1 -- '- -- Roads (circulation element) 43.3 -- Specific Plan 852.8 870,000 0.8 679 1 Includes natural areas, manufactured slopes adjacent to roads, drainage detention areas, trails outside golf course, and linear green belt along El Camino Real. Source: T &B Planning Consultants (1993) 5 -33 5-34 if tri� a Table 5 -13 Different Leucadia Boulevard Alignment Bluff Cut Grading Elements Alignment Encroachment of Graded Banks With Maximum Graded 25%+ Slopes 30 Ft+ Height Bank Height (AC) CAC) (Ft) Leedshill- Herkenoff 1.5 3.8 75 Land Use Plan Al 1.5 (2.8) 3.8 (5.1) 75 (95) Scheme 11 0.7 (1.3) 3.4 (4.6) 51 (65) Scheme 21 1.6 (3.0) 3.6 (4.9) 67 (85) Scheme 3 1.4 3.9 90 1 Adjusted values are entered first with gross values in parenthesis. Source: F.C. Springer & Associates (1993) alignments, Scheme 3 would have the least steep slope encroachment at 1.4 acres, but would have the largest area of high graded banks with 3.9 acres, and the highest maximum bank height at 90 feet. Topographic Alteration and Visual 4uality Land Use Plan A and Scheme 3 would result in the least noticeable landform alteration. These alignments would be situated in a large ravine with cuts limited to the upper reaches of the bluff. The alignments are partially obscured from view by ridges on each side, and a prominent knoll near the valley floor. Scheme 1 would be located partly in a small ravine with cuts through a ridge to reach the mesa top. Scheme 2 would cut its full length through a ridge along the bluff. These Schemes would be visible in their entirety. Biological Resources An analysis of the biological impacts of the different Leucadia Boulevard alignments has been conducted by Sweetwater Environmental Biologists (1993). In overview, total impacts to sensitive habitats would be relatively the same. Scheme 3 would have the least total impacts to sensitive plant species. Scheme 1, Land Use Plan A, and Scheme 2 would have greater total impacts in their respective order. Schemes 1 and 2 would eliminate total impacts to Encinitas baccharis. Scheme 3 would eliminate direct impacts to this species but would have indirect impacts because of the close proximity of the roadway. Both Land Use Plan A and Scheme 3 would eliminate impacts to California gnatcatcher habitat. Schemes 1 and 2 would be preferred from an ecosystem perspective because they preserve the largest area of contiguous habitat. However, Land Use Plan A and Scheme 3 would be more beneficial to sensitive plant species as a group because the fragmentation would encompass the most populations. A detailed discussion of the different Leucadia Boulevard alignments follows. Impacted vegetation types and sensitive plant species are summarized in Tables 5 -14 and 5 -15. The various alignments were provided at different scales and /or were designed with different degrees of detail. In order to fairly assess impacts, the Specific Plan Leedshill - Herkenoff precise alignment was compared to the Specific Plan T &B alignment for Land Use Plan A to determine a gross to net correction factor to apply to Schemes 1 and 2. Scheme 3 is directly comparable to the Leedshill version. 5 -35 4J G u) E r-1 L4 $4 ro ro 4) H a N O N 00 a to >4 -1 H 'O C rd o U.� V � ro i� W W LI > 4) .d W W 41 A ro a � H H Ts: 4) .-i .Q ro E u d L C V N d E CO to O OI L 3 0 4- w T N 41 u W N d r W a r 43 E Ol >4 .A LI �i ca > m 4) 4) :3 U ma ro roro U � �a a� C � ►1 IO w 4) W fA .14 A 'O 4) � to 1 a 1n E H 4) H .Q to H 5 -36 v, o O - - w 41 - - M 00 Ln M O F N LA O Q N N 01 Ln L v C ~ N J N N N M M N 00 O t O O O N r N O O O O r J E u L D L v O N O It �O 0 N 0 ti O FO r r N v v v v v �O f�- O O O W r O N O O O O O M _ E cJ v L � v L N iA O r 00 fz tl n 00 �O r 'O r /- O N P r r r N O O N O r Ln O W CL Ln 10 CD N M U� 0 O O O O O O d C L J N L 0 0 0 0 0 0 0 L W� E r r 0 Lu UN 1 W N O M t a F L L c IC N N to L O V O � a d 'O N M .4 C7 C J 10 v w N E L > T E W C J C �O E O C N O O •i+ u C m W N O� � 4j 10 0 OL 10 40 L L N r L J 0$ ai W u v v 7 D N H 1> W ci K F u d L C V N d E CO to O OI L 3 0 4- w T N 41 u W N d r W a r 43 E Ol >4 .A LI �i ca > m 4) 4) :3 U ma ro roro U � �a a� C � ►1 IO w 4) W fA .14 A 'O 4) � to 1 a 1n E H 4) H .Q to H 5 -36 N CL E m O Y Yl C E W E 41 u OI 16 E u L 10 E E C u N V m CL E N d L c E E L u d Z rn 01 N U) O 0 rl ro J-� Q E Q O la C W $4 4) 41 ro 3 a) 4) 3 En 4) U $4 Q O U) v, o O - - w 41 - - M 00 Ln O F M LA O N N 01 Ln E C ~ L N O t O O O in O, L D O N O It �O 0 0 ti O FO r r N W O p S r Ln N 1 C L H N O r N L S /- N P r r O O O 0 O O 41 Ln 10 0 N M 0 O O O O O O d „y L N 0 0 0 0 0 0 0 L r r 0 UN �O M N O M a F c O O a 'O N M .4 C7 C J C J M N O O O O� � D N 7 L m d o cc L r N d W C N N �Cp E N O W E 10 L d N Y C L v N i i E E a+ ♦+ L m V H W G C N 2 3 ~ N CL E m O Y Yl C E W E 41 u OI 16 E u L 10 E E C u N V m CL E N d L c E E L u d Z rn 01 N U) O 0 rl ro J-� Q E Q O la C W $4 4) 41 ro 3 a) 4) 3 En 4) U $4 Q O U) Schemes 1 and 2 would result in the lowest total loss of sensitive vegetation at 3.3 acres each. Land Use Plan A and Scheme 3 would result in slightly greater losses at 4.2 and 4.3 acres respectively. For Diegan coastal sage scrub, Land Use Plan A and Scheme 3 would have no impacts. Scheme 2 would impact 1.2 acres while Scheme 1 would impact 0.6 acres. Although the coastal California gnatcatcher does not currently occupy these areas it is considered dispersal habitat. For southern maritime chaparral, Scheme 2 would have the least impact at 2.1 acres. Schemes 1, Land Use Plan A, and Scheme 3 follow with 2.7, 3.0, and 3.3 acres respectively. For scrub oak chaparral Schemes 1 and 2 would have no impact while Scheme 3 and Land Use Plan A would impact 1.0 and 1.2 acres respectively. Marsh would be impacted only by Scheme 1 and involve less than one acre. It is noted that Land Use Plan A and Scheme 3 would bisect the bluff where there is currently an existing bottleneck of natural vegetation. Cultivated fields encroach into the bluff at this point almost fragmenting the natural habitat but leaving a remnant connection. This connection is the narrowest stretch of native vegetation within the bluff area both on and off the site. Scheme 3 would result in the lowest total impacts to sensitive plant species involving 158 individuals. Scheme 1, Land Use Plan A, and Scheme 2 would have greater impacts involving 310, 335, and 1966 individuals respectively. On an individual basis, Schemes 1 and 2 would eliminate total impacts to Encinitas baccharis. Scheme 3 would eliminate direct impacts to this sensitive plant but would result in indirect impacts because of the close proximity of the roadway (within 50 -100 ft). Land Use Plan A would be the least preferred. For Del Mar manzanita, Schemes 1 and 2 would impact the least individuals at zero and two plants respectively. Scheme 3 would impact 10 individuals. Land Use Plan A would be the least favorable. For Del Mar sand aster, Scheme 1 would eliminate impacts. Land Use Plan A and Scheme 3 would each impact 10 individuals. The least preferred would be Scheme 2. For summer holly Scheme 3 would impact one individual. Land Use Plan A would impact 31 individuals, while Scheme 1 would impact 50. Scheme 2 would be the least preferred. For Nuttall's scrub oak Scheme 3 would impact 51 individuals. Land Use Plan A would impact 126 individuals while Scheme 2 would impact 170. The least preferred would be Scheme 1. For wart - stemmed ceanothus Scheme 1 would have no impacts. Scheme 2 would impact four individuals while Scheme 3 would impact 81. Land Use Plan A would be the least preferred. Land Use Plan A and Scheme 3 would have no impact on California gnatcatchers. Schemes 1 and 2 would both impact dispersal habitat for this species. Habitat fragmentation for the different alignments is itemized in Table 5 -16. Schemes 1 and 2 would preserve the largest areas of contiguous habitat at 499 and 438 acres for the northern segment. In turn, these alignments would result in the smallest southern segment at 34 and 45 acres respectively. Land Use Plan A and Scheme 3 would be the most beneficial to sensitive plant species as a group. These alignments would create southern segments 93 acres in size which contain the most populations of these species. Although isolated from the northern segment, these areas most likely have the highest concentrations of sensitive plant species of the entire bluff system on and off the site. Other Resource Issues Schemes 1 and 2 would result in less development than with the Specific Plan. Reductions in dwelling units would be 416 and 391 respectively with Scheme 1 Plans A and B. With Scheme 2 reductions for Plans A and B would be 427 and 447 respectively. With Scheme 1 generated traffic volumes would be lowered by roughly up to 4160 ADT while with Scheme 2 the volumes would drop by roughly up to 4470 ADT. There would be associated reductions in vehicle emissions both locally and in the air basin. There would also be less demand for public services because of less development. However, impacts to these resource issues would be significant. 5 -37 Table 5 -16 Different Leucadia Boulevard Alignment Habitat Fragmentation Fragment Land Use Plan A (AC) Scheme 1 (AC) Scheme 2 (AC) Scheme 3 (AC) Northern segment 390 499 438 90 Southern segment 93 34 45 ::::93 Source: Sweetwater Environmental Biologists (1993) 5.2.3 MITIGATION MEASURES Impacted vegetation and sensitive species mitigation requirements for the various Leucadia Boulevard alignments would be essentially the same as for the Specific Plan Land Use Plans A and B. Habitat fragmentation impacts would remain significant. Mitigation measures for grading and landform alteration impacts would be the same as for the Specific Plan Land Use Plans A and B. These impacts would be reduced to levels of insignificance. 5.3 REDUCED EFFECTS ON ENCINITAS CREEK FLOODPLAIN 5.3.1 CHARACTERISTICS An alternative site plan for Green Valley has been prepared by T &B Planning Consultants which reduces Encinitas Creek floodplain intrusion. The alternative design is shown on Figure 5 -17. Attention has been focused on withdrawal from the floodplain in the southern portion of the valley. It is assumed that encroachment in the northern portion is allowable in accordance with identified exceptions for open space uses, minimum development and flood control protection. Two small commercial buildings would be relocated, together with an additional building, adjacent to E1 Camino Real on each side of an additional access road crossing over Encinitas Creek. The recreational sports fields would be eliminated and the floodplain left open in that location. 5.3.2 COMPARATIVE IMPACT ANALYSIS The reduced effects on Encinitas Creek floodplain alternative lessens intrusion of the floodplain. Hydrology and Grading An analysis of floodplain encroachment for the alternative design has been conducted by F.C. Springer & Associates (1993). Changes for the alternative compared to the Specific Plan Land Use Plans A and B are presented in brackets. of the total 25.5 acre floodplain, 16.5 acres would be in open space and improved channel [ +0.8 ac and elimination of active recreational use]. The regional commercial center would occupy 6.7 acres [ -0.5 ac] and mixed use would occupy 0.2 acres [ -0.4 ac]. Combined intrusion with fill for other than roads would be 6.9 acres [ -0.7 ac]. Roads would encroach on 2.1 acres [ +0.2 ac]. 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This modification would be consistent with minimum development rights and flood protection needs. General Plan Consistency The alternative design would be consistent with Encinitas General Plan goals and policies pertaining to floodplain preservation. 5.3.3 MITIGATION MEASURES Mitigation measures for hydrology and grading impacts would be the same as for the Specific Plan Land Use Plans A and B. These impacts would be reduced to levels of insignificance. 5.4 DIFFERENT USES AND USE CONFIGURATION 5.4.1 CHARACTERISTICS Four land use options were explored during the specific plan evolution process. Two of the options were selected for further consideration and given more detail. Of these two, the Specific Plan was then chosen as the preferred land use plan. The detailed option not selected is presented as an alternative. Land uses are summarized in Table 5 -17. Agricultural use would be located in a contiguous block in the South Mesa planning area, south of an extension of Leucadia Boulevard. Single family residential uses would be located in all planning areas except West Saxony and Green Valley. The West Saxony and East Saxony planning areas on each side of Saxony Road would support mixed uses including multi - family, commercial, office, and church facilities. Quail Botanical Gardens would be expanded into the East Saxony area. A village center, school, and community park would be located in the South Mesa, North Mesa, and Sidonia East planning areas on each side of Leucadia Boulevard. There would be a regional commercial center, office, church, multi - family, and recreational uses in Green Valley. Main vehicle transportation corridors in addition to Leucadia Boulevard would be north -south Quail Gardens Drive, Via Cantebria, and Garden View Road. Magdalena Park would be maintained as a community park and natural open space preserved along the bluff in Green Valley and North Mesa, and in finger canyons of North Mesa and Quail Hollow East. Encinitas Creek and its tributary in Green Valley would be in an open channel and would support wetland vegetation. Interconnected bike paths and trails would be provided throughout the various planning areas. The total dwelling unit count of 1535 for the different uses and use configuration alternative would be 285 units more than Land Use Plan A and 409 units more than Land Use Plan B. When considering the Specific Plan optional multi - family use the alternative would have 150 more units than Land Use Plan A and 274 more units than Land Use Plan B. The alternative land use plan would also have 155,000 more commercial /office square footage than Land Use Plan A and 300,000 more commercial /office square footage than Land Use Plan B. The alternative would have at most about 32 more acres of agricultural land, and no golf course. 5.4.2 COMPARATIVE IMPACT ANALYSIS The different uses and use configuration alternative was dropped from further consideration at the constraints analysis phase of the specific plan process. This alternative land use plan would be more intense than Land Use Plans A and B and traffic volumes, vehicle emissions, and demand for services would be 5 -40 Table 5 -17 Different Uses and Use Configuration Alternative Summary Land Use Type Acreage Commercial /Office Dwelling Unit Dwelling Units (AC) Square Footage Density (DU) (SF) (DU /AC) Single family Residential CtotaL7 [228.71 -- [2.63 [5951 Single family Residential 82.0 -- 1.0 82 Sin le Famil y Residential 146.7 -- 3.5 513 Multi - Family Residentiall 27.5 -- 20.0 550 Mixed Use [total] [83.41 [375,0003 varies [3903 Green Valley [total] [17.41 [125,0003 [30.03 [1901 Multi - family Residential 6.4 -- 30.0 190 Commercial /Office /Church 11.0 125,000 -- -- East Saxony CtotaL7 [53.03 [175,0001 [20.03 [2001 Multi - Family Residential 10.0 -- 20.0 200 Commercial /Office 23.0 175,000 -- -- Quail Botanical Expansion 20.0 — -- -- West Saxony CtotaL7 [13.03 [75,0001 -- -- Commercial /Office 13.0 75,000 — -- ELementary School 11.0 -- -- -- Regional Commercial Center 67.3 650,000 -- -- A riculture 166.0 -- -- Ma dalena Ecke Community Park 29.8 -- -- -- O en S ce2 199.6 -- -- -- Roads (circulation element) 39.4 — -- -- Specific Plan 852.8 1,025,000 1.8 1,535 1 Does not include multi- family units in mixed -use areas. 2 Includes natural areas, manufactured slopes adjacent to roads, drainage detention areas, and trails outside golf course. Source: T &B Planning Consultants (1993) 5 -41 greater. It is assumed that impacts to other resource issues would be similar to or more severe than those identified for the Specific Plan. 5.5 STRICT ADHERENCE TO ENCINITAS GENERAL PLAN CRITERIA 5.5.1 CHARACTERISTICS A basic framework for development of the specific plan area under City of Encinitas jurisdiction is found in the Encinitas General Plan. The specific plan area is designated Specific Plan [SP] with an underlying designation of Residential [0.51 -1.00 Units /Acre] for the extreme western portion. A Specific Plan Overlay is applied to the SP designation calling for a specific plan to be prepared which implements applicable city wide and particular goals, policies, and provisions. The Special Study Overlay covers environmentally significant areas including the northwest finger canyons, Quail Gardens canyon, the bluff, and Green Valley. Goals and policies triggered by the overlay preserve significant features such as bluffs, slopes, habitat, viewsheds, and cultural resources. Environmentally sensitive habitats are given further protection by goals and policies restricting development on steep slopes with coastal sage scrub and mixed chaparral, and in wetlands, and requiring special consideration of Encinitas baccharis. Preservation of prime agricultural lands and open space resources is encouraged. Saxony Road, Leucadia Boulevard, and E1 Camino Real are designated scenic highways and there is a scenic corridor along El Camino Real north of Garden View. The Circulation Plan designates Saxony Road and Quail Gardens Drive as Augmented Local Streets (2 Lanes), Via Cantebria as a Major (4 Lanes), E1 Camino Real as a Prime Arterial (6 Lanes) , and Leucadia Boulevard as a Major (4 Lanes) . The recreational trail system runs along the mesa top, the northwest finger canyons, Leucadia Boulevard, E1 Camino Real, and between El Camino Real and the mesa trail. There are bikeways along Saxony Road, Quail Gardens Drive, Via Cantebria, E1 Camino Real, and Leucadia Boulevard with a north end Saxony /Quail Hollow connection and south end Via Cantebria /Garden View Road connection. Direct references to the specific plan require agricultural and open space uses on the upper mesa south of the Leucadia Boulevard extension and low density residential (2 -3 units /acre) use on the mesa north of Leucadia Boulevard. Mixed uses of light industrial, commercial, office professional, institutional, and residential may be allowed in Green Valley. Total development potential must not generate vehicular traffic in excess of 25,000 ADT. Areas reserved for agriculture must be at least 40 acres in size with surrounding uses located, clustered, and buffered to avoid conflicts. Direct access to development in Green Valley must be other than E1 Camino Real. A conceptual specific plan in accordance with the framework for such a plan under City jurisdiction has been formulated as an alternative to the project. Land uses are summarized in Table 5 -18. The plan area differs from, and is slightly larger than the Specific Plan in one location based on the specific plan boundary established in the General Plan. This location is the Leaf property (2.5 ac) which is included in accordance with the surrounding designation for single family residential use, or two dwelling units. Agricultural use would be located in a contiguous block on the upper mesa south of an extension of Leucadia Boulevard. Single family residential uses would be located on the upper mesa north of Leucadia Boulevard. There would be multi- family, commercial, office, and industrial uses in Green Valley. Main vehicle transportation corridors in addition to Leucadia Boulevard would be north -south Quail Gardens Drive, Via Cantebria, and Garden View Road. Magdalena Ecke Park would be maintained as a community park and steep slopes of finger canyons in the northwest sector retained in natural open space. The bluff on the west side of Green Valley would be retained in natural open space. Encinitas Creek and its tributary in Green Valley would be in an open channel and would support wetland vegetation. There would be interconnected bike paths and trails throughout the 5 -42 Table 5 -18 Encinitas General Plan Land Use Alternative Land Use Summary Source: City of Encinitas Planning and Community Development Department (1993) area. Total dwelling unit count for the City framework alternative would be 932. This would be 318 units less than Land Use Plan A and 194 units less than Land Use Plan B. When considering the multi - family optional use for the Specific Plan the alternative dwelling unit count would be 453 units less than Land Use Plan A and 329 units less than Land Use Plan B. The alternative would have 300,000 total square feet of commercial and office uses. This would be 570,000 total sq,_re feet less than Land UsE> Plans A and B. With the framework alternative t. _e would be 100,000 total -square feet of industrial use. The Specific Plan has no industrial use. With the alternative there would be 341.1 acres of agricultural land. ncrease of 215.1 acres compared t0o.La d Use Plan B compared P There would ben � and no ar , golf course with the altern dive. 5.5.2 COMPARATIV_ IMPACT ANALYSIS A specific plan in accordance with the framework established by the Encinitas General Plan would meet most of the objectives of the project. There would be a plan for the area, it would be annexed to the City, and development would occur in an orderly manner. The alternative plan would be consistent with certain goals and policies of the General Plan particular to the specific plan area and there would be at least twice as much agricultural land. However, such a plan would not provide as many dwelling units or as broad a range of housing opportunities compared to the Specific Plan. The commercial service would be limited in size to a neighborhood center rather than a regional center. There would be no golf course and fewer recreational opportunities for citizens of the City and surrounding communities. The industrial use could result in conflicts with surrounding uses. This alternative would result in substantial reductions in traffic volumes compared to the Specific Plan. With an estimated 25,769 ADT for the alternative 5 -43 there would be a reduction of 42,268 ADT compared to the total 68,037 ADT for the Specific Plan. The associated reduction in vehicle emissions both locally and in the basin would lower air quality impacts to insignificance at the project level. Because of less development there would be considerably less demand for public services with the framework alternative. It is assumed that impacts to other resource issues would be similar to or less severe than those identified for the Specific Plan. 5.6 COUNTY JURISDICTION 5.6.1 CHARACTERISTICS A basic framework for development of the specific plan area under San Diego County jurisdiction is found in the San Diego County General Plan. The plan area is designated [AC] Agricultural Cropland in conjunction with [SPA] Specific Plan Area [2.8] by the San Dieguito Community Plan. Land along Encinitas Creek and its tributary is identified as floodplain and the entire planning area is within the coastal zone. It is the goal of the community plan that the plan area be developed through a specific plan and that Leucadia Boulevard be extended through to E1 Camino Real. Numerous community wide goals and policies of the community plan are applicable to the plan area. Several policies ensure that encroachment into the sensitive bluff and wetlands of Green Valley is minimized, buffers provided, and natural features preserved. Development in Encinitas Creek is prohibited within the floodway and policies and recommendations ensure watercourse setbacks, preservation of riparian habitat, and maintenance of watercourses in their natural state. Magdalena Park is considered to be a community park. The County of San Diego Local Coastal Program (LCP) San Dieguito Land Use Plan contains numerous community wide and particular polices applicable to the specific plan area. Certain policies are devoted to preservation and protection of sensitive habitats and individual species of note including coastal sage scrub, coastal mixed chaparral, riparian, and Encinitas baccharis. A number of policies are established to preserve prime agricultural lands over the long -term. Particular requirements allow development of the plan area for residential purposes under Large Scale Project review. Development must reserve at least half of the lands suitable for agriculture for that use. Total dwelling units on the developed portion of the lands cannot exceed the number obtained by multiplying the total acreage of the overall plan, exclusive of wetland areas, by a density factor of 2.8. Additional particular requirements include permanent protection for the agricultural portion of the plan area, a minimum size for agricultural areas of 40 contiguous acres, selection of suitable agricultural areas based on Class I -IV soils on slopes under 10 percent, and locating and clustering new development to reduce conflicts with agricultural activities. In the event that all development cannot be accommodated within Green Valley, additional areas distinct from the basic mesa top agricultural area may be considered if development would complete a logical and viable neighborhood, and establish a stable limit to urbanization. Buffer zones must be established between field crops and residential areas, clauses included in deeds for new residential areas recognizing negative effects of nearby agricultural activities, and access controlled to protect agricultural activities. Further definition is given to the framework by other applicable County general plan elements, zoning ordinance regulations, and Board of Supervisors policy requirements. E1 Camino Real and I -5 are identified as part of the County scenic highway system. Scenic resources within these corridors must be protected. Zoning ordinance Agricultural Preserve Area regulations restrict development in agricultural preserves with uses for lands under Williamson Act contract restricted to those set forth in the contract. Uses for other lands are set forth by the applicable use regulations except those subject to use permits. Use permits can only be granted for other lands if the use complies with the Act and 5 -44 is compatible with continued agricultural use in the preserve. Zoning ordinance Coastal Protection Area regulations protect and preserve areas of environmental sensitivity, steep slopes, major drainage ways, and outstanding scenic quality. Zoning ordinance Flood Plain Area regulations prevent building habitable structures in floodways and restrict development in floodplains. The Resource Protection Ordinance establishes special controls on development for wetlands, floodplains, steep slopes, sensitive biological habitats, and prehistoric and historic sites. Hillside Development policies further minimize the effects of disturbing natural terrain and provide for creative design. Large Scale Project Review ensures that major projects are consistent with applicable laws and ordinances, conform to adopted plans, and are compatible with adjacent development. A conceptual specific plan in accordance with the framework for such a plan under County jurisdiction has been formulated as a possible alternative to the project. Land uses are summarized in Table 5 -19. The County plan area differs somewhat from the City framework plan area by including the YMCA /Sports Park (15 ac) and Thornton (40 ac) properties, and excluding the Carter (3.1 ac) property in Green Valley along E1 Camino Real south of Olivenhain Road. Table 5 -19 San Diego County General Plan Land Use Alternative Land Use Summary Land Use Type Acreage Commercial /Office Dwelling Unit DweLLing Units (AC) Square Footage Density (DU) (SF) (DU /AC) Single Family Residential [totaL3 [296.53 -- [4.33 [12653 Residential 1 49.0 '- 1.0 49 Residential 5 196.5 -- 4.3 844 Residential 6 51.0 -- 7.3 372 MuLti-FamiLy Residential (8) 81.0 — 14.5 1175 Public /Semi - Public [totaL3 [15.03 -- -- -- YMCA /S its Park 15.0 -- -- -- A riculturel 259.9 -- '- Ma dalena Ecke Community Park 29.8 -- -- Open Space2 180.4 -- -- -- Roads (circulation element) 44.6 -- -' -- Project3 907.2 -- 2.8 2440 Total acreage derived by Class I -IV soils with <10% slope gradient (551.0 ac) minus ponds and miscellaneous unusable areas (12.6 ac), and creek channel with associated wetland vegetation and miscellaneous unusable areas (18.8 ac), divided by a factor of 2. Includes natural areas, manufactured slopes adjacent to roads, drainage detention areas, and trails. Total dwelling units derived by project acreage (907.2) minus wetlands (20.9 ac) and YMCA /Sports Park (15.0 ac), times allowable density factor (2.8). It is assumed that a specific plan under County jurisdiction would be similar in many respects to both the project, and a specific plan under strict adherence with Encinitas General Plan criteria except where the frameworks clearly differ. For example, comparable residential densities have been selected and distributed similarly. Community park and natural open space acreage is nearly the same. 5 -45 However, under the County criteria determination of total agricultural acreage and total dwelling units is clearly defined. Further, since the framework does not mention commercial, office, or industrial uses they are not included in this alternative. It is also assumed that because the YMCA and sports park were acceptable to and approved by the County, that these properties would be excluded from developable acreage for calculation of total allowable dwelling units. Agricultural use would be located in a large contiguous block on the upper mesa south of an extension of Leucadia Boulevard. Low and medium density single family residential uses would be located adjacent to surrounding similarly designated residential uses north and south of Leucadia Boulevard. There would be multi - family dwellings west of Saxony Road. Medium density single family and multi - family residential uses would be located in Green Valley. Main vehicle transportation corridors in addition to Leucadia Boulevard would include Quail Gardens Drive, Via Cantebria, and Garden View Road. Magdalena Park would be maintained as a community park and the steep slopes of finger canyons in the northwest sector would be retained in natural open space. The bluff on the west side of Green Valley would also be retained in natural open space. Encinitas Creek in Green Valley would be in an open channel and would support wetland vegetation. There --would be trails throughout the plan area interconnecting open space. Total dwelling unit count for the County framework alternative would be 2440. This would be 1190 units more than Land Use Plan and 1314 units more than Land Use Plan B. When considering the multi - family optional use for the Specific Plan the alternative dwelling unit count would be 1055 units more than Land Use Plan A and 1179 units more than Land Use Plan B. The alternative would have no commercial, or office uses compared to 870,000 square feet for the Specific Plan. With the framework alternative there would be 252.9 acres of agricultural land. This would be an increase of 125.8 acres compared to Land Use Plan A, and an increase of 133.9 acres compared to Land Use Plan B. There would be no golf course. 5.6.2 COMPARATIVE IMPACT ANALYSIS A specific plan based on the County framework would meet some of the project objectives. It can be assumed that with a specific plan the area would be developed in an orderly manner. However, without annexation both the City and County would be involved in evaluation of future entitlements and provision of services to development would be less efficient. There would be no office space, no commercial services, and fewer recreational opportunities. The specific plan would be consistent with certain goals and policies of the County General Plan pertaining to the specific plan area. This alternative would have at least twice as much agricultural land but no golf course. There would be a substantial reduction in traffic volume with this alternative compared to the Specific Plan. With an estimated 24,171 ADT for the alternative there would be a reduction of 43,866 trips. There would be a reduction in vehicle emissions both locally and in the basin which would lower air quality impacts to insignificance at the project level. Because of the larger number of dwelling units the demand for public services with the framework alternative would be greater. Impacts to other resource issues would be similar to or less severe than those identified for the Specific Plan. 5.7 DIFFERENT LOCATION Because the Specific Plan regional commercial center and golf course were not anticipated uses in either the City or County frameworks for the specific plan area, a search for reasonable alternative sites for these uses has been conducted. Four sites, shown on Figure 5 -18 and described as follows, have been identified. Three of these sites are located in the City of Encinitas, and the fourth in Carlsbad. 5 -46 5.7.1 CHARACTERISTICS Hall Property (map symbol - 1) This approximate 45 acre property is located along the west side of I -5 south of Santa Fe Drive, behind a neighborhood commercial center (Santa Fe Plaza). Current land use is agriculture with the site covered by greenhouses. Topography is relatively flat. Drainage is to the southwest into Rossini Canyon. The Encinitas General Plan designation is Residential 2.01 -3.00 Units /Acre. The corresponding zone classification is Residential 3 [R -3]. Surrounding land use is primarily single family residential to the south and west. These areas are designated Residential 2.01 -3.00 Units /Acre as well as Residential 3.01 -5.00 Units /Acre, and Residential 5.01 -8.00 Units /Acre with corresponding zone classifications of Residential 5 [R -5] and Residential 8 [R- 8]. The adjacent 10 acre commercial center is designated and classified Local Commercial. There is a hospital complex (Scripps Memorial Encinitas Hospital) across Santa Fe Drive to the north. ChancflTec -Built Properties (map symbol - 2) These combined properties total about 146 acres located on the north side of Manchester Avenue, between Sienna Canyon Drive and Trabert Ranch Road. The site is vacant and covered with native vegetation. Topography is gently sloping up from Manchester through the center of the site, and steeply sloping up around the perimeter. Drainage is under Manchester to nearby Escondido Creek and San Elijo Lagoon. The Encinitas General Plan designation is Residential 0.51 -1.00 Units /Acre with a corresponding zone classification Rural Residential 1 [RR -1]. Land use surrounding the property is mostly single family residential. Dwellings to the north are suburban in character, while those to the west, east, and south are rural. The closed Encinitas Landfill lies along the northern boundary. San Elijo Lagoon Reserve is situated across Manchester Avenue to the southwest. The residential areas are designated Residential 0.5 -1.00 Units /Acre, as well as Residential 0.26 -0.50 Units /Acre, Residential 3.01 -5.00, and Residential 5.01- 8.00 Units /Acre. Corresponding zone classifications are Rural [R], Residential 5 [R -5], and Residential 8 [R -8]. The landfill is designated and classified Public /Semi - Public. Yasuda /Gim Properties (map symbol - 3) These combined properties total approximately 45 acres located on the north side of Manchester Avenue, adjacent and east of I -5. The site is partly in truck crop agricultural use. There is native vegetation on a bluff along the northern boundary. Topography is gently sloping up from Manchester, then steeply sloping up as a bluff beyond. Drainage is under Manchester directly into San Elijo Lagoon. The Encinitas General Plan designation is Residential 1.01 -2.00 Units /Acre with a zone classification of Rural Residential 2 [RR -2]. Surrounding land use is varied, with single family dwellings to the north, a community college (MiraCosta College) to the east, an auto service station to the west, and the San Elijo Lagoon Reserve across Manchester to the south. The residential area is designated Residential 2.01 -3.00 Units /Acre and classified Residential 3 [R -3]. The college site is designated and classified Public /Semi- Public while the lagoon is designated and classified Ecological Resource /Open Space /Parks. The gas station is designated Residential 2.01 -3.00 Units /Acre and classified Residential 3 [R -3]. Hunt Property (map symbol - 4) This approximate 281 acre property is located adjacent and west of E1 Camino Real between La Costa Avenue and Olivenhain Road in the Citv of Carlsbad. Portions of the site have been used agriculturally to produce cut flowers on open fields. There is a riparian woodland along Encinitas Creek paralleling El Camino Real and 5 -47 To o raphy is gently then stee 1 sloping up as a bluff beyond. natural vegetation on a bluff along the wesptyboundary. P sloping up from E1 Camino Real, uitos Lagoon. The Carlsbad General Plan Professional and Related (O], and Drainage is into Encinitas Creek to ial The site is classified designations are Community Commercial [CIF C RMH]- Medium -High Density Residential (8 -15 DU/ AC) [ Planned Community zone [P-Cl- .. the property is varied. To the south tipper and mesasareas. the To Land use surrounding Specific Plan, Green Valley and upp vegetated land, agricultural fields of the Sp vacant, naturally g the east, across E1 Camino Real is the mostly including the Arroyo La Costa project site. There is family dwellings Lagoon lies across La Costa Avenue E1 Camino Real center to the northeast at La Costa Avenue with sin to the east. Batiquitos Lag nations for the land across and DU /AC) (RMH], and Carlsbad General Plan designations Density Residential La costa and are Open Space [OSJ, Medium-High Neighborhood Commercial (N]- The residential areas of Arro0 -4 DU AC) [RLMJ- elsewhere beyond are designated Low- Medium Density Residential 5.7.2 COMPARATIVE IMPACT ANALYSIS golf course would not The minimum size for a regional commercial Alternative sites for the regional commercial center an meet project size requirements. center is 60 to 70 acres. The service onsh area olf course is 150facres. on garnet Minimum size for an 18 hole champ P g golf course on the same developable acreage bass none ommerc' al lcenter lands g es are large enough me accommodate both a regional property. These use would hroeect sponsor does s,notcowndany ofpthetalternative both. It is noted that the p j p of these sites for sites or adjacent properties. Further, the availability purchase and development is unknown. Hall Property ut not large The entire 45 acre property is developable oss ble accesseisu limited to aefew commercial center or golf course. Further, p private road to the north to Santa unction residential streets to the south and one p Santa pment Drive. A scenario for the adjacent neighborhood commercial a center fronting with redevelopment of Fe Drive. Combined complex size wo Id be Howacres. The opment would not gmeet the access to, and good visibility minimum size requirement for a regional center. and general plan consistency. A combined center would likely use have significant impacts associated with traffic, air quality, noise, 1 would be of Traffic, general plan consistency, and land use compatibility greatest concern. Development would generate a high volume e t d traffic local with the primary access to Santa Fe Drive which is a two lane augur dential streets. Other access points would be local resi across Santa Fe Drive. The moderate traffic volume hospital facility directly re a general plan Hall property is designated for residential use and would requireof amendment. Commercial use ntiall uses to the would sout and west. conflicts with the west. existing low density reside Chang /Tec -Built Properties slopes chaparral habitat. Developable area sensitive coastal 6s age scrub andlsouthern maritime chapf steep as well as would have to be combined with In order to accommodate a g olf course the site These other vacant properties across Manchester Avenue otLagoonspreservesw and •support properties abut the Escondido Creek and San Elij access some sensitive vegetation. moIt is a regional that commercial center. would n Further, access area on the site to 5 -49 to major thoroughfares is limited to Manchester Avenue and the site is distant from I -5. Commercial use would probably have significant impacts associated with grading, biology, water quality, traffic, air quality, noise, general plan consistency, and land use compatibility. Of most concern would be water quality, biology, traffic, general plan consistency, and land use compatibility. Runoff from the development would quickly reach Escondido Creek. The site supports sensitive habitat which, except where severed by Manchester Avenue, is contiguous with similar habitat offsite and wetlands of Escondido Creek and San Elijo Lagoon. Access would be limited to Manchester Avenue with a high volume of traffic loaded onto this two lane augmented local street. The site is designated for residential use and a general plan amendment would be necessary. There would be conflicts between commercial use and the rural surroundings. Yasuda /Gim Properties Steep slopes and sensitive coastal sage scrub habitat would reduce the developable area for this 45 acre site. The site would be too small for a golf course. Although there is close access to, and good visibility from I -5, useable area of the site would be too small for a regional commercial center. The San Elijo Lagoon preserve lies across Manchester to the south and MiraCosta College is to the east leaving no adjacent land for combined development. Use for a commercial center would likely have significant impacts associated with grading, biology, water quality, traffic, air quality, noise, general plan consistency, and land use compatibility. Of greatest concern would be water quality, biology, traffic, general plan consistency, and land use compatibility. Runoff from the developed site would flow directly into San Elijo Lagoon. Sensitive upland habitat is contiguous with wetlands of San Elijo Lagoon except where separated by cultivated land and Manchester Avenue. Access would be limited to Manchester Avenue. Commercial use would generate a high volume of traffic and there is an existing moderate traffic volume college facility immediately to the east. The site is designated for residential use and a general plan amendment would be necessary. There could be conflicts between commercial use and existing residential use above on the ridge top and the San Elijo Lagoon preserve immediately across Manchester to the south. Hunt Property Developable area for this 281 acre site would be reduced by sensitive southern maritime chaparral and riparian woodlands. It would be too small for a golf course. The property would probably have enough useable area for a regional commercial center. There is a current proposal to develop 86 acres of the property with a 600,000 square feet of commercial use on 56 acres and 400 multi- family dwelling units on 18 acres with accompanying streets. Access would be to E1 Camino Real and possibly to an extension of Via Cantebria. Identified impacts associated with commercial development of this site would be to grading, biology, water quality, traffic, air quality, noise, and general plan consistency. Of greatest concern would be water quality, biology, traffic, and general plan consistency. Runoff would drain directly into Encinitas Creek and then Batiquitos Lagoon. Commercial use would generate a high volume of traffic with access restricted to E1 Camino Real if no connection is made to Leucadia Boulevard. The site is designated for community commercial use and a general plan amendment would be necessary. 5.8 NO PROJECT 5.8.1 CHARACTERISTICS The alternative of no project would retain the site in its present condition. There would be no specific plan for the area and it would remain under the jurisdiction of the County of San Diego. There would also be no alignment for 5 -50 improvements to and extension of Leucadia Boulevard. The principal activity on the property would continue to be agriculture. 5.8.2 COMPARATIVE IMPACT ANALYSIS When considering the whole spectrum of resource issues, none of the impacts environmentally superior alternative. With no project associated with development of the property under the Specific Plan or other alternatives would be realized. However, it must be noted that there would be of cultivated fields in Green Valley and erosion and on -going erosion sedimentation the Encinitas Creek channel. This would continue to exacerbate offsite sedimentation of the creek and Batiquitos Lagoon. None of the project objectives would be achieved with this alternative. Without a specific plan for the area there would be no guidance for its development into the future, and no detailed and dependable base for responsible local and regional planning decisions. The precise alignment for improvements to, and extension of Leucadia Boulevard would be unknown. Further, there would be no reasonable projection as to when this roadway and other missing links of the circulation system within the specific plan area would be completed. 5 -51 6.0 GENERAL ASSESSMENT 6.1 - - -- PROPOSAL IS IMPLEMENTED oided if the project is Potential significant effects which cannot be av revious se The ction entitled implemented are described n detail impacts are associated with geology and Environmental Impact Analysis- drolo and grading, topographic alteration and soils, hazardous materials, hydrology resources and paleontology, land visual quality, biological resources, riculture, traffic, noise, air use compatibility, general plan consistency, ag quality, and public ificance are identifiedtfor all resource issues except hydrology levels of insignificance alit biological resources, and grading, topographic alteration and visual quality, general plan consistency, noise, and air quality. A number of the impacts can be alleviated through Specific Plan redesign to and reduce effects on resources, particularly those related to hydrology grading, topographic alteration and visual quality, biological resources, and general plan consistency. The particular impacts which could be substantially reduced are steep slope encroachment, ime cha arral Encinitas nd coastalrsage fscrub, l and lossoof�individuals of southern marl P sensitive placons consistency thin the se hievedts•S ch redesign �i s discussed impacts in general a plan previous section entitled Alternatives to the Proposed Action. Redesign slightly lessen impacts to air owabledwelling units• quality b A more meaningful redesign which substantially reduces density and intensity Of the land uses one Tht adherence is alsoodiscu a p discussed in previous section specific plan area entitled Alternatives t o the Proposed Action. Impacts to noise cannot e alleviated through redesign. Where there is existing residential development along Leucadia Boulevard, no feasible measures are available to adequately mitigate noise levels resulting from improvements to the roadway. The alternatives involving redesign to lessen impacts on hydrology and grading, topographic alteration and visual quality, biological resources, and general plan nded consistency e re comme thefgeneral plan framework would not - providet balanced of strict alit housing opportunities or widen the tax base for the city. Further, air qu Y impacts associated with the recommended redesign would not represent a serious deterioration in air basin conditions. 6.2 THE RELATIONSHIP BETWEEN LOCAL SHORT -TERM USES OF MAN'S ENVIRONMENT AND THE MAINTENANCE AND ENHANCEMENT OF LONG -TERM PRODUCTIVITY Long -term effects of the project which adversely previous tse he stateent t he environment are described in detail in the p Environmental Impact Analysis. The impacts geology soils, hi ing, to P g raP h c alteration and visual quality, materials, hydrology and grad pa traffic, land use biological resources, cultural resources and pa traffic, noise, air compatibility, general plan consistency, agriculture, quality, and public services. The combined effects of the project and related projects are discussed in the following subsection entitled Cumulative Impacts. These impacts are to hydrology and water quality, topographic alteration and visual quality, biological resources, land use and general plan compatibility, agriculture, traffic, air quality, and public services. Impacts which have the potential to pose long -term risks to public health and safety are associated with geology and soils and hazardous materials. Particular geologic conditions which involve public safety are liquefaction or settlement of alluvium and uncompacted fills, unstable cut slopes, and expansive clays. Mitigation measures are identified to control these conditions and reduce effects 6 -1 to insignificance. Particular hazardous materials conditions with the potential to pose risks to public health are subsurface pesticides, herbicides, and copper in agricultural fields, a contaminated soil stockpile and abandoned underground storage tank, and subsurface hazardous materials at agricultural maintenance, storage, and greenhouse locations. Mitigation measures are identified to remediate these conditions and reduce impacts to insignificance. Impacts which reduce the range of beneficial environmental uses are those to hydrology and grading, biological resources, land use, and agriculture. The primary hydrology and grading impact is intrusion into the Encinitas Creek floodplain. For biological resources the particular impacts are the loss of sensitive coastal sage scrub and chaparral vegetation and habitat, and associated individual sensitive plant species. The primary land use impact is the loss of open undeveloped lands. For agriculture the impact is the loss of suitable productive lands. Redesign alternatives are identified to alleviate all of these effects except the loss of undeveloped and agriculturally productive lands. The project is justified at this time because the Specific Plan will provide for the orderly and efficient development of its respective area in accordance with provisions of the Encinitas General Plan. A unique feature of the Specific Plan is its two land use plans which provide options for development in the future depending on changing conditions. The Leucadia Boulevard alignment will provide for the orderly implementation of the City Circulation Plan in accordance with provisions of the General Plan. Annexation will provide for the orderly and efficient expansion of the City in accordance with the General Plan and regional plans for the area. 6.3 ANY SIGNIFICANT IRREVERSIBLE ENVIRONMENTAL CHANGES WHICH WOULD BE INVOLVED IN THE PROPOSED ACTION SHOULD IT BE IMPLEMENTED The project will result in a number of irreversible impacts which will commit nonrenewable resources to uses that future generations will probably be unable to reverse. These impacts are to hydrology and grading, topographic alteration and visual quality, biological resources, land use, and agriculture. In particular there will be intrusion into the Encinitas Creek floodplain, encroachment of natural. steep slopes, loss of sensitive habitat, loss of open undeveloped lands, and loss of lands suitable for agricultural use. Redesign alternatives are identified to alleviate the effects on all resources except undeveloped and agriculturally suitable lands. The loss of undeveloped and agricultural lands is small from the regional perspective. With a reduction in impacts associated with the redesign alternatives the consumption of nonrenewable resources will be acceptable. 6.4 THE GROWTH INDUCING IMPACT OF THE PROPOSED ACTION When addressing the growth inducing impact of a proposed project the California Code of Regulations, Title 14, Div. 6.3 (CEQA Guidelines), Section 15126 (g) (Resources Agency, 1991) requires a discussion of the ways in which the project could foster economic or population growth, or construction of additional housing, either directly or indirectly, in the surrounding environment. Project characteristics that may encourage and facilitate activities that either, individually or cumulatively, will affect the environment must also be discussed. Included in this are projects which would remove obstacles to population growth. Increases in population may further tax existing community service facilities. It must not be assumed that growth in any area is necessarily beneficial, detrimental, or of little significance to the environment. 6.4.1 GROWTH POTENTIAL Potential for growth in the project vicinity has been assessed by comparing general plan land use designations and development projections with the current amount of agricultural land, vacant or underutilized parcels, and natural open space. This has been accomplished by combining information presented in the 6 -2 discussion of land use with reviews of parcelized base maps, current aerial photos, and field reconnaissance. There is considerable for growth in the Leucadia community near the derable p otential project area. Gre ead canyon tocthe nort hweste are rdesignated for rsinglenfaly nd the parcel in Indian H Leucadia Highlands) has been use. A not yet built residential subdivision roved on one vacant parcel to the north. There are a number of recently approved even the vacant parcels in Passidonia arcelstthate could s be split designated lotsdg given use and several underutilized p greenhouses and numerous vacant designated density for the neighborhood. The use and there are parcels in Hillside Acres are designated for residential 97) and future (2010) several underutilized parcels. Encpnitas n existing General Plan indicates a potential land uses as designated by 1145.6 acre increase area could be expanded bye33 overall 4 acres while l industrialyuse buildout. commercial could decrease by 2.6 acres. Land surrounding the project area in Old Encinitas has moderate potential for growth. The agricultural fields and vacant parcels north of the extreme western designated residential and several sector of the Specific Plan area are_g vendensity, e unbu lt residential parcels are underutilized at the 9 roved for vacant land west of Quail subdivision (Seacrest Estates) has been reenhouse grouping to the south is also Botanical Gardens. Vacant land and the q designated for residential e.neThere are that could nderutilized be divided pin accordance Princehouse Lane/Seeman with the designated density. General otentialland increaselofa residential area by old Encinitas community indicate a p ing increase of commercial 317.4 acres at buildout. There could be an accompany and industrial areas by 28.5 and 15.4 acres respectively. Growth potential in New Encinitas near the project area is low. A post office built on the is planned immediately E1 aminoh south and o to the eastCe A light gndustrialecomplex could graded pads across parcel across El Camino Real at be constructed on the natural open space p Olivenhain Road. A specific plan for a retarol commercial Overall, the New Encinitas (Home Depot) has been approved for this pro y• ial community could experience designations. resident Commercial area area could increase accordance with 79.7 acres while industrial area is increased by 52.4 acres. immediate ential surrounding land to the north in Carlsbad has considerable growth p Natural open space hate plan for 1, costa northeast designated, 076 resident aldwellings on 5 1 8acresa have an approve Agricultural office, and multiefamilyeresident 1 use. a A master p an for 600, 000 commercial, square feet of commercial use and 400 multi - family dwelling units is being considered for the Green Valley community. The Specific Plan the itself implementati on of residential growth and uses. that The anticipated 80$ mid -range entire Encinitas planning area, if developed at net acreage ( ) density, will have an estimated 25,342 dwelling units at buildout (2010) with a population, at an average of 2.5 persons per n for, the63,862.icFor comparative purposes, total dwelling units and populat expected from usin the same net acreage mid-range density specific l densityand g average occupancy calculated q factors. With T is represent there 1 0% increase in both city wide dwelling tunits 682 persons. ional 145 dwelling and popudl 362 persons representing a 0.6$eincreasebfor both nits and population With Land Use Plan B units an P city wide. If the optional multi - family use in the Quail Hollow East and North Mesa planning areas are implemented these increases will be slightly higher. With Land Use 6 -3 Plan A there would be 372 additional units and 930 persons representing city wide unit and population increases of 1.5$. With Land Use Plan B there would be 244 units and 610 persons rep:- -�senting an increase in both units and population of 1.0% overall. If the opti.,nal hotel /inn use is implemented the ieases would be slightly less. ncr For the commercial growth category including commercial and office uses the Specific Plan will result in an increase in growth from that expected for the city under the General Plan. For comparative purposes commercial category use for the Specific Plan and General Plan framework for the specific plan area have been calculated using gross acreage. With Land Use Plan A there will be 68 more acres while with Land Use Plan B there will be 70 acres more. This represents a 5.2% increase the 594 commercial and office acres city wide. There will also be a decrease in light industrial acreage in the City because the Specific Plan will have none and the General Plan framework calls for 8.0 acres. 6.4.2 GROWTH INFLUENCES Project implementation may foster population or economic growth in the immediate vicinity and larger communities surrounding the project area in a number of ways. First and foremost is improvements and extensions of the traffic circulation system. Second is changes in land use in the Spec _fic Plan area which remove current land use conflicts with, and /or enhan�-e relationships with its surroundings. Together with this factor is changes in land use which create new conflicts resulting in pressures which ultimately stimulate changes in the immediate surroundings. Third is upgrading and extensions of sewer and water service infrastructure. The last factor is the provision of additional goods and services. Access is available to undeveloped and underutilized land ne_ ne project area and in the greater surrounding communities, and improvement:. mad extensions of the circulation system through implementation of the Specific Plan will not directly remove an access obstacle to growth. However, the improvement and extension of Leucadia Boulevard, and extensions of Quail Gardens Drive and Via Cantebria through the plan area will provide key of Plan circulation system connections, facilitating and encouraging more convenient movement between neighborhoods in the communities and between communities themselves. This will enhance the locations of affected areas and stimulate development. For example, the existing and Specific Plan commercial centers along E1 Camino Real will be more accessible to the Leucadia community by way of an extended Leucadia Boulevard. Conversely, I -5 freeway access and the coastal strip will be directly available to communities to the east. Quail Gardens Drive will provide a roadway in addition to Saxony Road for residents to reach Leucadia or Encinitas Boulevards. An extended Via Cantebria will provide an additional connection between Encinitas Boulevard and commercial areas along E1 Camino Real for Old Encinitas residents. Conversion of agricultural uses, particularly open field activities, to other uses in the Specific Plan and annexation areas will eliminate any existing or potential related conflicts with nearby established and future residential neighborhoods. This may stimulate growth in affected areas. For example, conversion of field agriculture to single family residential use adjacent to Passidonia Knolls will eliminate any conflicts such as dust and pesticide spraying, making these neighborhoods more desirable. At the same time this conversion could apply pressure on nearby greenhouse groupings to also convert to another use because of potential conflicts with the new residential use. The conversion of agricultural uses to single family, golf course, and mixed u could generally enhance the overall Leucadia community and foster growt- throughout. Support service infrast -.cture is available to undeveloped and underutilized land near the annexation area and in the greater surrounding communities, and improvements and extensions of systems through implementation of the Specific 6 -4 growth. However, there may Plan will not directly remove a service obstacle to r This could stimulate be some added convenience and /or reduced cost for new or replaced service connections if and where any off -site upgrades occur. provide additional growth in affected areas oher I recreat onal facilities lfwilllanpcommercial cen er, golf course, and ortunities for the goods, services, and recreational opp of conveniently located g This may enhance the locations and desirability surrounding communities. growth. these communities and stimulate their g ro ect area and in the greater communities some As growth occurs around the p 7 agricultural, vacant, and natural open space lands will be converted to urban oen uses. There will be resources�duIndividuallyaandecumulativelygrlandforms will space, and biological be altered by grading and impervious surfaces will be increased, resulting in more surface runoff, ulatT vetincreases urban in the demand for support services. There be individual and cum will also be individual and cumulative increases in traffic growthcadditional with vehicle exhaust emissions and noise levels. Finally, goods and services will be desired. 6.4.3 GROWTH MANAGEMENT With Specific Plan phasing, development of the project planned and provided dinvan area will be a period of years. This will enable services to be orderly manner, as well as prevent overwhelming sudden changes in existing services or quality of life in surrounding communities. A Public Facilities Benefit Assessment Dedtwill be paid for from within the plan area public rather than the not otherwise finan develo ment of the project area and its greater communities. In addition, P surroundings is subject to numerous agency growth management regulations. The City of Encinitas has adopted a growth management program as part of the Land Use Element of the Encinitas General Plan (City of Encinitas, 1989). The program includes goals and supporting policies to ensure that new development does not occur at the expense of the natural environment or existing lto accommodate new before adequate infrastructure and services a in place and policies are development. Pertinent growth management program olicies in support of goals to presented in Table 6 -1. Key to the program are pgrowth ensure that the he rate of capability of rsidential and commercial , protects the available services and fa does It ies, create demand that exceeds t P ad for quality of life of individual communities, and allows the C�oY am pisn an eannual provision of required services. At the core of the p g allotment of dwelling units based on projected ultimate buildout over an assumed rowth period and 25 year period and provision of commercial needs during this g thereafter as a fully developed city. The Specific Plan is consistent with all of the growth management policies. Long -term goals are given preference over short -term needs, particularly with the prevent encouragement and interim agricultural cation* Development will labelmanagedlto land p use designation overtaxing services by the Specific Plan Phasing Plan. ublic 'Aim Facilit willibe Financing Program will ensure that capital costs for p P wi fairly distributed. The Specific Plan will enhance the r ty i th additional residential, commercial, community, and recreational opp In addition, the Specific TheP agricultural, reseme rural, and mall towngatmosphere maintenance of community charac golf course, and natural open space. will be preserved through agricultural use, g o All segments of the sities and types. rtunities population will be provided with housing Commercial activity through a broad range of residential den will be concentrated primarily in the Green Valley planning Withelimited commercial use in the West Saxony and East Saxony planning areas. will be compatborhoods. tThe commercial district in Green gVa future ley will be buffered in these neigh 6 -5 E m O $4 a C E Ol ro C ro 3 O is ro r-I a .4 to a) C7 ro i-) •.1 C U R W t0 Gl .Q ro H F Z uj E LU J W ui c Z J 6 -6 L x v C O J ••^+ +W+ O �'' N E LO O A W C y N ai u vuW-r a N ' v •��W L W O)W ^ J r « r O O •^ 41 41 .> O C1 c d o W C r L �a 4- N L N > Q S a L u v c�v v L v a +'ate > > 0 " LO o .0 « v -, W W •p a L N p O 7 W r o W W E u LL O 3 41 « V2 W E y O a N V J 3 LW 3 N W O C U W r N C C C7 W N r W c tf 41 W L O O L E C 7 E u d u ° a o v L 0 ?; u C t7 O y G W 3 W O W L O. 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'- C W L O L y E C a s u r O OQ •� C L N J W W O y W N 3 W O L O. W .L C N V N L 7 N a > r d !r 7 u W W p '> a a t C L O r '2 Lu U C C W 7 d L CL u" W 01 U C L U� U 4 r s U Ol W « T J W 3 t 7 Ea E •! r 4' W �- 41 3 u 0 0 r L 7 a W E U) N W g CL O L L C O , N V r r y - G. 41 3 O d > 0 O W W 'D _ 0 > 41 41 U 0 L4- �� r W N '� N W Lw 41 0 L O '� C a E r W L •F- r W r C �0• N V E y O 0-4- a L E L L C O. •W u w a - 00 N u •� L M r C L> fn E r W N« u L O d 0 r 7 L u N v 7> L r N •� N O) W •x W N c C '�' a O r Oat+ C L 7 N W r� 4 L 4 L.^ a N q W O -+ N W O W y 4' W pNj V > W •� W C O W N 0- N W y r W 7 N -� L J \ N \ O L O ar .. w •V 7 t W ur N W 2 L r •C " « W U) L r C 'Y! ■ O s o go o O 7 c C L L « r « s Ol >1 CL pp�� 7V� V 7C W Wa N d « W N tWjJ p 0 3 'V C W -� w v L W a� rn vrdv +'Wa N 7L N C O•N L d W 7 EE W W N W- a r .0+1 N U o V C �» N W N O N W L •N -' C W O t N r •�•� t=7 L a s 3 L N u y CC 7 C -0 W r M C N W O C C C C r J L O Q d CO N by O a ` u - W W � N a 0 a -W a o-0 p 7 C N W CI W V o G _.. 0 r 0 W r u 0 W O E _ ` W C E 144. 4' W L E N •r •ru '� 7 w C f' ••• N u v 7 q! U y.y y u G v y y v C L E C N 7 E L N ; W E O ' LL L O U F r V W C W r C W a V N W •� in 4• M O) cc0 M L M O M 4, M t{�f L Y 0 u O N. o-yi W y 7 + v -N r `p J a•^ r N J L ~ d iD O M a J 0E O W> aWc t E a u - ad 0) N L 0 U c u 0) N .3 L d L Y O L 0 0 W O O N C 'N v 0) L 0 C s gV y 0 N N g ° to � yp_ QNy r ^ •L '9 � u Vv r •r LL ,U ■777 t! > L N Lr •r OI� W 7 � Cpp tly! 41 L L p> r. •r N IO °•:�9N c u L, g' 41 W r 0 O C L G W C 111000 � � Y w W 0 01:: c C •r .r., V �+ W M y 7 N W 1p rCC N ii u 1cv�p ••, v O ` L. 6 o c Of L w •a+ Y u c ++ C N W fy1 �4' 1 * O O Y v �e 21 � 4+ h° v •r N M L J Ny M•r v M� Ni3 0 r r p V O ° c V L L W V M 0 y E 0 N u o E O >1 V •r A x •r 3 i.l w L v M •r J E> K L X °au $Wdau � L r W y 7 N S � � m D N L Ol � 700 rm L � u � c •r L 10 4J CA = t d W N C C 7 C � J A- 39 7 S ov o 3 L E T D1 E N 7 •X W O J L O d y N W V WY2 E N E L L J � � J t s J J •N r L p N J . u N w S c 1 L v r O d J N r rn J W L 1 L OL � r • y v 7 l f r L t % N W H � 1 C L y j L C �c5 7 V C W '0 0 W L 1W T C OI a C O of N C NN L Oo 7 ° I 7 N L W !) L N � )N W •E E d ay j L ' C ' �� y u WC r � L N J w v J N - On O L O J W F• J u L N s ~ N N 'J - 7 r�w J C c N W 0W ~W 7 � • mE I n � c 0 7 r r o L v c L W � ° a eL 1 UIi _ � n W y v' •J 7 O•C 7 O� a>y Z r � W vc O ) N W ) � E CW L y a u ! L Ot WN L W u +� V W 7 L i = ) L W E O ' • N C v u 1 r E C � O � uN i O r •> W 0' W � vN W J V > C O v W W 41 Y L a Y ) L 0 0 r y ° '3 0 V N � L W > C Y I O J rL 41 - a a Y C O t 3 LU C W r ) E L s LS + W F U yL a �C T' E , O O 4, O y y > N Y OU 4) N C > N O ° L oL0 0 45 d o O L Y- y y u 4 N y 0 aY El L y L z r O y N C O v 4j v o " O 0 E O u i C J d C O 4-- ) W z Z XL 4p G N 7 uc7 W u•a O y � cb N N E . L . 0L y C ' 7 yL L r � � w O W L s o • O o ' N E ` . W L > LL L O N �J H � • C W 'r Cu ` y N ' T . t O• W N ! O r v a N C r l Z N OL y J 7 r l 7 E N EO C J E � ON W W y OL ) 7 i 1 � OE S s �IE / J ppJ W J v L W � W EE I y C •O N O L(�C y r u) G W O C E _ O N ) O v r 0 C 'v J L O s C . � 7 H L W � l 7 W W O T r y Y >c C > O W Y 0 y p 4- W O s TY l L v O Y O� x OC C y C 7 J 1 N w i OJ w 0 C U, .0 O 0 G W- d w r- > O 0. y y V 'c L- 'O W O ° O W- y T O L L- 41 0) L- ' ' c N 7 O 4- 0 O 4 L 5 ° L. s 6j O N L W N CW N 7 ' - W L YO � p C °N N O C W E v 7 c- u C y C O y Q y T L 0 d L N 0 O > y y y - O C t y -0 > p L_ O W = r N — d N O L. or 4J 41 E ) J L C L +' O .r • > O O O L 41 L C ; - Y L a ° 7 0 O Lc c y L O O O. Y d L N 1 L d d O o L O I 6 -7 r N Y moC O N L O i - l C r r N t�d i % g L 9gu v tb � ••' pr W u . � • r O l L V u • [ � L •' r • 9 1 e N ^ V WN 'a W ' r r N 6�t pp u � N O 1 , L U • pCr CC ' •r r � M'7 ~ • N CL. t y 0 > y O� L N 0) • 0 0W ! > ) d D O J > L °"' L W 41 1 L y . t ° W 0,- 4J C U 2 O W y Y L a N > 41 41 oV a � u C Jy 0 O y OI X c y p y ~ ' 3 N 0 O) L J r •r L �+u' r it 02 V W m 0 4,.,.l ., V v 'D � �+ 1 u+ L W e J s L Z N •r e L J N d g � Y N y s of N CC u 40+ 0 L y 7Nua J O W r cW u LW c L J L N •r y '^ r y L d •C U � "� � r U•WiiyN + � � N .0 u r �d�W ) L M y � " � r •r � N L N O M ` Y W s 41 x L C 41 Sttx ate uei a V •c L E E L O Y U v Y C Vs r W 1 O O 3 l L t E J L 0 v • v N 10 *1 O C W N C m ° L J v U C W• ` I 0 N 0 N � C J 7 Wr E L V v J uv r- v C r% •r M y d O W 0 W y d v- 0) L O L N L y O L W U L Ol E O U E 0 0 � L v � C W Y C C N O m c •J W L o Y L U T 0.41 C 7 W O 0 O T N y 'O W N an J VA W OI N N N u O. S 01 F- c • W 'n N d w OJ °a0 v N U C W W O J-1 U U O N O y y > N Y OU 4) N C > N O ° L oL0 0 45 d o O L Y- y y u 4 N y 0 aY El L y L z r O y N C O v 4j v o " O 0 E O u i C J d C O 4-- ) W z Z XL 4p G N 7 uc7 W u•a O y � cb N N E . L . 0L y C ' 7 yL L r � � w O W L s o • O o ' N E ` . W L > LL L O N �J H � • C W 'r Cu ` y N ' T . t O• W N ! O r v a N C r l Z N OL y J 7 r l 7 E N EO C J E � ON W W y OL ) 7 i 1 � OE S s �IE / J ppJ W J v L W � W EE I y C •O N O L(�C y r u) G W O C E _ O N ) O v r 0 C 'v J L O s C . � 7 H L W � l 7 W W O T r y Y >c C > O W Y 0 y p 4- W O s TY l L v O Y O� x OC C y C 7 J 1 N w i OJ w 0 C U, .0 O 0 G W- d w r- > O 0. y y V 'c L- 'O W O ° O W- y T O L L- 41 0) L- ' ' c N 7 O 4- 0 O 4 L 5 ° L. s 6j O N L W N CW N 7 ' - W L YO � p C °N N O C W E v 7 c- u C y C O y Q y T L 0 d L N 0 O > y y y - O C t y -0 > p L_ O W = r N — d N O L. or 4J 41 E ) J L C L +' O .r • > O O O L 41 L C ; - Y L a ° 7 0 O Lc c y L O O O. Y d L N 1 L d d O o L O I 6 -7 r N Y moC O N L O i - l C r r N t�d i % g L 9gu v tb � ••' pr W u . � • r O l L V u • [ � L •' r • 9 1 e N ^ V WN 'a W ' r r N 6�t pp u � N O 1 , L U • pCr CC ' •r r � M'7 ~ • N CL. t y 0 > y O� L N 0) • 0 0W ! > ) d D O J > L °"' L W 41 1 L y . t ° W 0,- 4J C U 2 O W y Y L a N > 41 41 oV a � u C Jy 0 O y OI X c y p y ~ ' 3 N 0 O) L J r •r L �+u' r it 02 V W m 0 4,.,.l ., V v 'D � �+ 1 u+ L W e J s L Z N •r e L J N d g � Y N y s of N CC u 40+ 0 L y 7Nua J O W r cW u LW c L J L N •r y '^ r y L d •C U � "� � r U•WiiyN + � � N .0 u r �d�W ) L M y � " � r •r � N L N O M ` Y W s 41 x L C 41 Sttx ate uei a V •c L E E L O Y U v Y C Vs r W 1 O O 3 l L t E J L 0 v • v N 10 *1 O C W N C m ° L J v U C W• ` I 0 N 0 N � C J 7 Wr E L V v J uv r- v C r% •r M y d O W 0 W y d v- 0) L O L N L y O L W U L Ol E O U E 0 0 � L v � C W Y C C N O m c •J W L o Y L U T 0.41 C 7 W O 0 O T N y 'O W N an J VA W OI N N N u O. S 01 F- c • W 'n N d w OJ °a0 v N U C W W O J-1 U U O N from E1 Camino Real and in a concentrated node rather than developed as a strip along the roadway. Finally, the rate of residential and commercial growth under the Specific Plan will ensure the ability to plan for public services improvements, will not exceed services capacities, and enhance community character. With phasing, residential development will occur in an orderly fashion over an extended period of time. Specific Plan residential and commercial land uses will be compatible with the existing atmosphere of surrounding communities. The commercial uses will reflect a balance of uses in the surrounding communities through siting in several locations including the East Saxony, West Saxony, and Green Valley planning areas. Through phasing, commercial use will be implemented in a timely manner to support the individual communities and greater City. The City of Carlsbad has adopted a Growth Management Ordinance (City of Carlsbad, 1987) which implements the provisions of Proposition E requiring that public facilities and improvements meeting City standards are available concurrently with the need created by new developments and to limit the number of residential dwelling units which can be approved or constructed in the City. No application for any building permit or development permit can be accepted, processed, or approved until a city -wide facilities and improvements plan has been adopted and a local facilities management plan for the applicable facilities management zone has been submitted and approved. Further, no zone change, general plan amendment, or specific plan amendment which would increase the residential density or development intensity established by the general plan can be approved unless an amendment to the citywide facilities management plan has first been approved. In order to ensure that residential development does not exceed limits established in the general plan, growth management control points are established for the residential density ranges of the land use element. No residential development permit can be approved which exceeds these control points unless certain findings are made. A local facilities management fee is established to pay for improvements or facilities identified in local facilities management plans which are not financed by any other fee, charge, or tax on development. The Zone Plan for the La Costa Southwest community (Zone 12) was amended in August of 1990 to include Arroyo La Costa. The Zone Plan for Green Valley (Zone 23) is in the initial planning stage. If the specific plan area were to be developed under County jurisdiction the goals and policies of the Regional Land Use Element (Department of Planning and Land Use, 1980) are the primary base for guiding the physical development of the unincorporated area. The element also in part implements the Regional Growth Management Plan approved in concept in 1978. The growth management strategy implemented in the element attempts to guide new urban development into areas where urbanization will be least costly, conserve future options for development, and meet housing and other needs of County residents. This is accomplished by determining appropriate locations for urban growth, appropriate uses for rural and semi -rural areas, and conditions under which growth can take place. Appropriate locations for growth are addressed in the selection of Urban Development Areas. Land Use Element goals are specific in that urban growth is directed to areas within or adjacent to existing urban locations, that the rural setting and lifestyle of the remaining areas of the County are retained, and that growth is phased with facilities. Appropriate conditions under which growth can occur are addressed by policies pertaining to groundwater, integrated facilities adequacy, road adequacy, coordinated capital improvement, local governmental structure, City review, inclusionary housing, and expenditures within target areas. According to the Regional Land Use Element Map (Mapping Section, 1990) the specific plan area is a county island designated as a 1985 Current Development Area. The nearby unincorporated San Dieguito community is in the Estate Development Area [EDA] which combines agricultural and low density residential uses. 6 -8 6.5 EFFECTS FOUND NOT TO BE SIGNIFICANT Based on an initial study various possible significant effects of the project this were determined not to b effectsfarenbreachmentnof standards relatingltonsolid document. The possible public water supply; substantial waste or litter control; contamination of a p er resources; degradation of, or depletion of ground wat interference lateruor water recharge; displacement of a large number of people; ; use of fuel, wfans or energy in a wasteful maner; and interference with emergency response p emergency evacuation p n 6.6 CUMULATIVE IMPACTS The California Code of that gulatio cumulative Title impactsv.be•3discussed d ) where tare 15130 (a) requires significant. Cumulative impacts are defined as two or more individual effects considerable which, when consider gethe , Individual are effects may be hanges compound resulting increase from ed other environme a single project or a number of separate projects. The cumulative impacts from from the incremental several projects is the change added toe other environment re related past, pre ent, and impact of a project projects. reasonably foreseeable future p ro 7 Cumulative impacts of the project are assessed by identifying other projects that produce related impacts, summarizing their have produced or are likely to p anal zing relevant combined project and Y individual and cumulative effects, options for mitigating or avoiding these related projects impacts, and examining op impacts. 6.6.1 RELATED PROJECTS Related projects are indiv duallandecumulative dleffects and mitigation measures documented significant provided in in Table 6 -2. Detailed information for each of these projects is p environmental documentation ont file o with thethe rectsc follows ad agencies as noted in the table. A brief P Aviara (map symbol - 1) and Resort Aviara was processed under the title of Pacific Rim and partially constructed (Westec services, 1986). This project is an approved and p Y master plan for 1402 acres to support a maximum of 4555 dwelling units, an 18 sort hotel, and hole golf cou ssl, re west of E1 Camino Real and vnorth r serving of Lacosta Avenuel n the The project is Aviara Community Zone 19) of the City of Carlsbad. Ouail Gardens (map symbol - 2) o Curtis Quail Gardens was processed under the c lts an apps approved Gardens fully constructed Scott Englehorn, 1978). This p j planned space. The development for s east of Saxony Road, 1northfof1QuaileHollow and open space. Drive in the Leucadia Community of the City of Encinitas. House of Mazda (map symbol - 3) fully constructed major use p ermit for The House of Mazda is an approved and 41.92 acres supporting a church facility. related This de elopment agricultural s atc the tterminus open space (Curtis Scott Englehorn, 1980). of Aryana Drive, off Quail Hollow Drive in the Leucadia community of the City of Encinitas. 6 -9 Leucadia Highlands (map symbol - 4) Leucadia Highlands is an approved planned residential development for 84.0 acres to support 22 single family dwellings together with open space (Coleman Planning Group, 1993). The project is located east of Saxony Road at the terminus of Bella Vista Drive off Quail Hollow Drive in the Leucadia Community of the City of Encinitas. Saxony Hills (map symbol - 5) Saxony Hills was processed under the title of Quail Gardens Unit No. currently referred to as the Indian Head Canyon property (Westec Services 1 and is , 1981). This project is an approved, but expired planned residential development for 59 acres supporting 156 townhomes in 3 to 6 unit clusters together with open space. The project is east of Saxony Road, south of Quail Hollow Drive in the Leucadia Community of the City of Encinitas. Olivenhain Road (map symbol - 6) This project is an approved widening /realignment of a portion of the existing Olivenhain Road, construction of an associated floodwater detention dike, and construction of a flood control berm at the intersection of La Costa and E1 Camino Real (Brian F. Mooney Associates, 1992). The project is located between E1 Camino Real and Rancho Santa Fe Road, and at the intersection of E1 Camino Real and La Costa in the cities of Encinitas and Carlsbad. Home Depot (map symbol - 7) Home Depot is an approved specific plan and tentative map for 55.5 acres to support a home improvement center, commercial and light industrial uses, and 19 single family dwellings (reduced to a maximum of 5 dwelling units) together with open space (Constance A. Willens & Associates, 1993). is at the southeast corner of E1 Camino Real and Olivenhain Road in The site the New Encinitas Community of the City of Encinitas. Arroyo La Costa (map symbol - 8) Arroyo La Costa is an approved master plan for 670 acres supporting 1076 single family dwellings together with a school site, open space, and a small travel service center (M.F. Ponseggi & Associates, 1990). This project is located adjacent to and east of E1 Camino Real, north of Olivenhain Road in the La Costa Southwest Community (Zone 12) of the City of Carlsbad. Shellv Tract May (map symbol - 9) The Shelley Tract Map is a pending proposed subdivision of 114.6 acres into 258 lots, of which 256 will support single family dwellings and two will be dedicated open space (M.F. Ponseggi & Associates, 1993). This site is adjacent to and east of Rancho Santa Fe Road, south of Olivenhain Road in the La Costa Southeast Community (Zone 11) of the City of Carlsbad. Green Valley Master Plan (map symbol - 10) This project is a pending proposed master plan for 281 acres to support 600,000 square feet of commercial retail space and 400 multi - family dwelling units together with open space (Coleman Planning Group, 1993). The site is adjacent to and west of E1 Camino Real, south of La Costa Avenue in the Green Valley Community (Zone 23) of the City of Carlsbad. 6 -10 v 0 1 4 0 U r O � 0 C C � f g tU W > 0f 4 C O Z Y Z J to Q L Z N d L N .rl y J-� S ro r♦ 0 Y U 41 O N ro m .a N 4 ,F, Y W H O q> ro tr m 44 -.4 7 mro (Q to U U -f'1 Q1 O 8 y4 H a r♦ N +) r♦ p4 O N � �O W .Q H D Y O ap+ 0 O C C C C O c c c y v c to d c to c o z i z z z z = Z Ltu s M c 7 0 r v p w v ai N p v N v� N 1 YO 0 C C C C N 0 o c c to w u C tY N c y y C 0 0 O = v 0 z z Z Z = W Z Y Y +' C Y C d 0 C C W W W V U U w W L pf 01q N N C C nCr N C .r > 01 r Y C rCi o-C.t o-C.t •"� �••� V `H •r ►t _ J N W L W C � O W , u v tri 0 0 4' d Y Y Y N W Y W E d N N 7 U > S07 OI E N > C 7 L 0 O E C V C v E N C N > N M. . 41 7 U 01 L E C C y L L W L W L N 7 C W L C W ` Y W N 7 C r C C C O IM Y 'O Y �C C pp � L N N 7 Y Y C W W L N N 7 L a N dC j N Jv p .r W •L L + W Y 0 1 W � C W N N C O uGG U cc 36 L W c W 01 7 IM W` 0 C W N -a-a d r N O E W W C Y W Y U > 7 E W t V 0) (D 0 y y O1 W H U N M Y C Q E S U � ^ tU I N W J r N «,r v C A W toil W N 04 Y W O 1"I W a 0 Id 4- N tU .ti u W " Ld E OC Y C •r O N ci 6 J LL Y g W 6j V Y W-0 U m Cs v C r V 9 E E C J a` G P7 C C NCy N �G 7 u 0 O V W y N W _ L LL d � S •O E C iC! to W •r ppp Y 7 3 W V E N O tom? W 7 7 U N Y7 N � >2 p Y 7 Y N C Q y aG L V O •vr - 7 7 O LW > E N W H co W N J W V ! 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U 41 IO c O W E c C C p C C 4J V N E fn Z = Z nc 0 Y 41 41 E N 41 41 V- L •O IO 1 C O ' 41 •� C O .r u v- w L N C r y> .� U) Of 41 OL NW 4 w C C N N •N Fy �y N nq M N Y r c C c o c °.s c ° o Y t p y M E �h> "N •� I C O L 4 u .L 7 �O + N N i Y E L N N C C L E r L Y 7 C •�+O•+ f 7 2 N M O S t f ^ O d U t = OW ! E � p N • v Y + V c O 7 C • 7 +U O' N f V � 2 N 84J 4 E l C m � a'cEH +i L L N L 'i cY E v >7 � C U W N Y Y T ^ . N C Y E O L E L1WGi ,C ! N 4 y F L L _ f 42 L >U L ' U Y C L 7 Y QE , Y . O V L U L a tlf 1+ N a ++ 04 o a Y U L O r J N a•r 0 U U C 4- L. 7 L N y �C L Y go C Y 0 > 7 z N c i+ a. M to N O C W Y 1 d a w O d v V rl n V 41 M `O im W N W UpO w W I W uO E c O N p O O O r 4 N v W ! uj a y L~ p N 4 V Y Y m Y N A T 4+ 1 . 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C u 0.0 u H W IW.1 1pQ, C •L i l0 la CL J C M > 7 W tl E O 10 Cl r u L• v CC N u v Al 41 u�°/'LUCC to Sa�rcm� •� a3i r N O O L v L u O 7 !p J N •N N u 7 O u _'r N C M L. 4,:.5 0 -> r C 4) yto L Cl V .uI L 0 V- N L {j N a t la L7 2 .c, la do — 3 Ol Q. L r 6 -26 C E r 10 CL In C � 1 J � a N L O T •r 9 N u 4-- O c 0 C a C Ol 0 c O N N N r v c7 C WW W p J a O 0! N T U J Q H N ti u C W O T r O 0 O a J O 7 y i c I c N N J i •O .0; W 00 C .w r O W T E r r La u O 16 C N L Cu d V, C p W L � !6 u O\ C T r� U � c N � J I ca u C 0 E r I CL 0 in Im C CL saucy L c rcyc L zL a oc 0 0 L 0 u 0 L la C E E to E r N N r r C y E L 0 U 0 L L J W L L �"� G C y E 4- r0il Y 0 E C L 0 J o r O y c T y W a C � u J> 1 41 r J y C r o-Ei a go ` u E a u' a O O q, C > rJ•rJ C O la U W y J 41 > C> y E L 0 J a �' C G W C E O C J L a C C C O J Cp L W E C C C W C E L v C Y- r E v S E Val J O C C •C •C > W C 0 7� r 9 NW E EW 4' E O W> �• N a E M O N a C C 7Nti W X1.70 C j0 u C L ►' N I 07 r O. .� C 410 hJ CJ CJ9 Y.��'O 1i 4- a C C C y W J r N W N1 C G a L d-0 NQ. Ol y 0 aaLL 6W d� d COQ N ca� v C� M. C V M C O Q C CL cl r a O� C CyT c w v a r •"` � L N pp C LO E QC C L . 0 J a t7 1 - V O N 0 !! C C N O. C y N a' i �I pl N r C .r C ca C N C H W 0 >` y C W W 3 W 'O C y W 0f C r U E O �F- •� Ofd C 41 r r r C> 0 0 G 0 O O N 3 .N v L • L V N C d E Vl O. LL !' C" Cp C u a c N N y C V V p0 1J a U d. d 10 N N d JE ID r e, y N LL W 41 L v d O u u 3 m cpi E L c0l NN M � 10 f� 03 0, O� 6.6.2 CUMULATIVE IMPACT ANALYSIS Individual environmental impacts of the related projects are very similar. Numerous common cumulative impacts have also been identified. It is apparent that potential exists for significant project and related projects combined effects associated with hydrology and water quality, topographic alteration and visual quality, biological resources, land use and general plan compatibility, agriculture, traffic, air quality, and public services. Project impacts are considered significant if there are documented cumulative impacts and additional project generated impacts will exacerbate these conditions. Project impacts are also considered significant if, when combined with other related project individually significant impacts, they will result in previously unidentified significant cumulative effects. Hydrology and Water Quality The project and related projects will result in increased storm runoff rates and volumes. These effects are known to cause degradation and sedimentation of unprotected downstream drainage courses and sedimentation of Batiquitos Lagoon. In addition, further development of the watershed will result in increased discharge of urban pollutants into drainage courses and Batiquitos Lagoon. Construction of detention basins along Encinitas Creek by related projects as recommended by the Drainage Study for Encinitas Creek (Chang, 1991) will reduce peak flood flows, erosion, and sedimentation of the creek channel and floodplain as well as Batiquitos Lagoon. Required project off stream urban pollutant and sedimentation controls, together with tributary channel and floodplain erosion and sediment controls will reduce current sediment yields and minimize urban Pollutant discharge from the property. Although project and related project individual hydrology and water quality impacts will be adequately mitigated, and combined effects minimized, cumulative water quality impacts to Batiquitos Lagoon may still be significant. A concise assessment of cumulative hydrology and water quality impacts to Batiquitos Lagoon is provided in environmental documentation for the recently approved Batiquitos Lagoon Enhancement Project (U.S. Army Corps of Engineers, 1990). In summary, the lagoon watershed geologic consisting of unconsolidated sand and gravel. Recent features composed Of silt, sand, and gravel are located along San Marcos and Encinitas which flow into the lagoon. Sediments Creeks, from these drainages have extensively overlayed the lagoon bottom bedrock. As a result of man -made features, the tidal inlet to the lagoon has been almost continuously closed to the ocean. With closure, the lagoon has become a "sink" for deposits of sediments, nutrients, and other constituents contained in freshwater drainage flows. Changes in lagoon surface runoff hydrology and water quality are expected as a result of continued urbanization in the watershed. There will be increased peak storm discharges, runoff events of shorter duration, and increased low -flow- period discharges. Increased runoff will result in greater freshwater inflow rates into the lagoon during storms, and increases in total volume of freshwater entering the lagoon. Nutrient loadings and other contaminates in runoff will increase and be introduced into the lagoon with freshwater inflow. Nitrogen and phosphate, oil and grease, metals, and biological oxygen demand (BOD) are expected to increase by uses. 100 to over 500 percent depending on the mix of land Conclusions presented in the environmental documentation for the enhancement project indicate that with re- establishment of tidal action of the lagoon as proposed, some of the adverse influences of urbanization on the lagoon can be substantially reduced. With tidal action fine sediments and nutrients will be flushed from the lagoon before they can settle or cause eutrophic conditions. Tidal action will thereby maintain the sediment deposition rate and water quality within a range that would arrest continued lagoon sedimentation and reduce eutrophication potential. 6 -27 To ra hic Alteration and Visual Quality in the will result in a significant change f the The project and related projects The a agricultural and open space quality visual character of Green Valley• g persons as a degradation in the scenic valley floor will be lost to d commercial ome p and mixed use development. This be considered Y fired site layout, grading, architectural, transformation may ro ect required vista. Project and related p j design guidelines for development will ensure that future and landscaping g buildings and their landscapeareuavailables for reasonable designations n tionsv of open be offensive to No other mitigation measures some lands to their designated land uses short of amending the form of open space use. Biolo ical Resources The project will result in significant chaparral antecommun communities. ro ect and related projects lants such as Del Mar sensitive coastal sage scrub and southern maritime chaparral p wart - stemmed ceanothus, Nuttall's scrub oak, and There will also be a net loss of individual sensitive P the coastal manzanita, summer holly, Blocks of California adolphia. Habitat for sensitive tailmwilllbelulo including - natcatcher and 0gmentthroat whip ro ect California g mented and isolated. Project and related contiguous habitat will be frag required open space areas and offsite e net losses nwill further reduce sensitive Will offset individual impacts. ide perspective. natural habitat from a system In 1991 passage of the California community NCCP CSS) program. Conservation Sage Scu Act established the Natural Community Conservation planning/coastal lant species and their The program is intended to conserve native animal and p habitats in areas large enough to ensure their continued viability over the long - ro ram by developing the term. The City of San Di portions the San NCCPDiego 9 county within the City sewer service area are participating The County of San Diego is Multiple Species Habitat ConeparatiionPof the Multiple HabitaConsseisadirected also participating through pi P Open Space Program (MHCOSP). For north San Diego County the program Conservation e effort to toward a multi-jurisdictional sb Carl ad has it sown Hab tat ManagementtProgra► (P) Plan (MRCP)• The City of and Fieldstone Company its individual Habitat Conservation Plan (RCP)- Tans are being approached Although the NCCP/ he varioussresponsiveasubregional plans and its target sensitive species, t es. The intent is to with a broader scope to include all sensitive habitat typ lant and plan for conservation within them reach t sensitive a threat habitat ned ors endangered status- Lan- P animal species Use and General Plan Compatibility a , ro ects will Significant cumulative undeveloped empants to he pr uses. Although some naturally of Bevel be the conversion d the principal lands to be converted o buffers ect and related vegetated areas will be involved, currently, or have been in agricultural u e. of sensitive a natural project and between various urban uses, and preservation topographic features sioftu developedllands toltheir designatedoland uses zcannot Reasonable conversion otherwise be mitigated without amending the designations to some open space use. Agriculture significant decrease in The project and related projects will Altho result in t l pheroject provides for productive coastal agricultural land. ugh and increased production of continued agricultural activities into the u ure, there certain crops will nearly offset the value reductions for retired crops, will be a net loss of arable acreage. 6 -28 As part of the project the Specific Plan Zoning Ordinance allows agriculture activities by right as an interim use in areas not designated for agriculture. Because the Specific Plan will be implemented in phases over a considerable period of time this measure will minimize the econcmic effects of retirement of agricultural lands. The Encinitas General Plan also includes policies to encourage agricultural activities on lands elsewhere in the city designated for urban uses until such time as they are developed. Both the Carlsbad Land se Planer Plan Land Use Coastal Pro ram (Planning Department, 1991) and measures to protect and preserve agriculture inCthe coastalszone.19The General include Plan includes a Non - Residential Reserve designation with the intent to provide for interim agricultural use until ultimate land use character is established. The Carlsbad Local Coastal Program (LCP) establishes a Coastal Agricultural Overlay Zone. The zone encourages agricultural use of suitable land, recognizes and provides programs for conversion of some -and to urban use, and identifies Mitigation measures. Designated lands can be converted if equivalent agricultural land is preserved in the statewide coastal zone, or continued or renewed agricultural use is not feasible, or a miti atio ee acreage e mitigation fee is used for purchase of agricultural g and or agricultural and other coastal resource improvements in Carlsbad. Traffic vehicle trips generated by the project and related projects will contribute significant incremental increases in traffic volumes on the circulation system. Project and related project requirements for certain system improvements will minimize localized effects. System wide increases in traffic volumes can be expected to result in congested conditions on certain roadways. The San Diego Association of Governments Sec. 65080 (SANDAG) is mandated by Government Code to prepare and periodically update a Regional Transportation Plan (RTP). Actions by transportation agencies such as Caltrans and the Transit Development Boards must be consistent with the RTP. In addition, local jurisdictions are encouraged to consider the RTP in land use decisions and accommodate the facilities and programs specified in the RTP wherever possible. Most local transportation projects must be consistent with the RTP to federal or state tax funding. obtain Regional transport ationaI policies established bi. the current 1990 Regional Transportation Plan (SANDAG, 1991) address all arms of transportation and identify facilities and programs which will be neeaed to meet increased travel demand through the year 2010. This RTP will be updated in the future to reflect changing conditions and deal with increasing traffic volumes on the system. Air Quality Incremental increases in traffic volumes from the project and will result in incremental increases _elated projects in vehicle emissions in the air basin. Project and related project requirements for traffic system improvements will conditions ltionscanlbee xpectedtto resultdin to congesion. a gre tertSystem wide congested emissions loads for the basin. The RTP includes a traffic congestion management element with policies to influence travel demand by reducing the number of vehicle trips. In conjunction with improvements to the circulation system these policies are intended to minimize air quality impacts. Because air quality and the RTP also has an element addressing these concerns. A series of actions to are closely related energy improve air quality are suggested such as transit ride sharing. use, bicycle commuting, and To address air quality conditions in- San Diego basin the San DiecJ Pollution Control District (APCD) has aeveloped the Regional Air 4 County Air lit (RAQS). The 1991 RAQS includes transportation control measures (TCM,$) in Strategy 6 -29 related air quality Vehicle trip and Best form to address mobile source emissions. ic applied to all projects, Mitigation is categorized eSntoo stands Mitigation ial Measures pied to impacts are Available Mitigation Measur while BAMM represent a higher level of control where significant and work and non -work vehicle trips t queuing commercial indicated. SMM measures target lot designs to reduce vehicle q centers. Examples are parking ools. BAMM measures focus on land use parking for carpools and vanp transportation systems, mass preferential p neighborhoods, alternative plans with self contained transit rider incentives, and clean fuel fleet vehicles. Public Services ro ects will result in significant increased increments The project and related p providers demands have adopted plans to respond to future for services- Service P These plans are periodically updated based on demands with system improvements. both individual providers projections and San Diego Association of Governments (SANDAL) population forecasts. 6.6.3 REDUCED DEVELOPMENT FOR GREEN VALLEY MASTER PLAN would be An option for reducing cumulative Valley Master Plan in Carlsbad. A development A P reduced development for the Green ace would be reduced by scenario consistent with the e Carlsbad acommercialPretail space ffi in professional Compared to the proposed Mast are feet of officunpt count and 300,000 square feet. There would be 150,000 squ dwelling use not included in the Master Plan. The multi - family open space acreage would be the same- Development for Green Valley Master Plan Table 6 -3 Reduced D Commercial /Office D Duelling Unit Dwelling Units Acreage D Square Footage ( Density ( (SF) -- 8 8 -151 400 Multi -Famil Residential 3 34.79 _ _- -- 25.27 3 300,000 Commercial _ __ -- 15.74 1 150,000 Office Professional - -- 194.80 0 en S ce 10.60 Roads 8 8_151 400 281.20 4 450,000 Master Plan Growth C Control Point of 1 11.5 dwelling units per acre- 1 Assumes Carlsbad General P Plan G approximately 10,000 ADT This development scenario woThereewouId be aecorrespondi g reduction in vehicle and in the air basin. Air quality impacts would continue to for the Master Plan area. emissions locally Mitigation be significant. There would be would continue to befsignifi ant and tm tags along E1 Camino Real. However, hang possible that with reduced development, measures would remain unchanged. It is P acts to the creek and downstream crossings of Encinitas Cree nt in the Master water quality imp area could be reduced k and undeveloped land and to two. However, significant itos Lagoon would persist. There would be a loss of significant g significant change in visual character in Green Valley. 6 -30 7.0 MITIGATION MONITORING AND REPORTING PROGRAM Public Resource Code, Section 21081.6 (AB 318 0) requires public agencies to adopt ro ram whenever they adopt CEQA findings that a reporting or monitoring p g insignificance. The significant impacts will ro program must. be designed level of compliance ct pp with reporting or monitoring p 9 epr s royal. mitigation measures which are adopted om fordthe °projectris presented as A mitigation monitoring and reporting program t o of mitigation, Table 7 -1. The program lists mitigation imingures, YP compliance miti ation timing or schedule, P responsible party or monitor, program authority, and associated documentation. Further explanation of the p g follows. Mitigation measures listed in the program are those necessary to reduce significant project impacts to levels of insignificance mitigation ameasuresr is made conditions of project approval. The type classification based on associated acwhichlincludesfineasurese incorporatedeinto mitigation (program symbol i plans exemplified by road improvements or plans such as tentative maps or site p ro ram symbol - CM) includes grading specifications. Construction mitigation construction activities such as grading measures conducted in the field during or drainage and street inspections, temporary dust and erosion control, sustained mitigation (program symbol - improvement inspections. The last type is SM) which includes long -term measures such as natural vegetation restoration maintenance, landscape vegetation maintenance, or open space preserve security. The program monitor • responsible verifying implementation of the mitiga tion measures Examples eastate registered geologist performing or a state licensed landscape architect preparing a a geologic investigation, landscape plan and certifying its implementation. The schedule ior to,hduring, or time when mitigation measures and monitoring occur, usually p after construction. measures Dare completed authority This person represents the for ensuring that project approval and permitting agency such as the City Engineer or City Planning Director. Program documentation provides a written record of mitigation smymbolr ( - implementation. A mitigation monitoring compliance report (p g plan, can c rtefication of implementation report, tentative and indicating rcompletion plan, symbol - DFL), monthly reports (program of a measure. 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O IA 2 u w of 4 W V a+ • v V C y L C r G _ _ 3 C 4 W W 4 W O 4 n W n> F L 0 M 7 N O L U r •r ce 4 N W N 7 W N I L L � In qj rN r C I �'9 4 a > W � u aaa, -0 a- EC w Q , C+ 2 ♦+r E •r S " EI a p> y m C C � W c > O • CWC m W J O r W•- 2 p• Op V, 4, L4 II4 W a C V V O N N u C r ^ C L . 3 E V to ur u E E r •w � L 4 7 t W O C e4 4E G r4 4 m m W V L L O A 4 U t O W N .0 W Z C L p w C 4 U 4 N 41 V M C C .•ir 4 r C g 4 N C r ` r W O N L r L I'W � n >. 7 L O J V d 0 r a X C m O O •C O C 4 N •• 0 F N 4 W 0 •N 0 0° 4°° m 4 7r r N r U Q Q W U 50 E 7 -9 C O N � ^ J LL � £ D C T E T O u J L > O u 010 N J Y L L > C t N 0� 0-0 v+ auoW M to O N Y Y u W N N u racism Y a) m Y J �'r 0r Y L Y LC �u d ary m ar C m •r O N Y 0 c u o m s y:. m 7 O O £ L cu s J u v 41 o N 2 t0i C O1 O O q O V Y Y > N Y 7 41 V •r N N C C N 0 X =0 Y a7 N c�mcium4' d m O g E q a E L a) •r L • E 4- O a) w a O •r •r Y N u ++ Y 7• r N N 1L�p a Y•- c '0-0 O r G L r Y 0 C N m m y q 'q0 E O C Cm C CA m O .4+ E a E d y r C T 0 "v01c0u�d V1 N J. V u L U L J m d L G i T r m C Y m u N u 7 Y 0. L a) m L u cogJarn=0 0 L E G m 7 g v m .. a7 N N N 7 al a) a1 m L L L 1 Y Y Y o v•r ac > � Y al a! 47 Y •r O m u E u •}01 J •r . L L > L N L N N u E •t/ L 041 •r4J Ym C L u m v E Y c> c O -+ t O J d 3 u g N m N 'UE £ T J M u U Y O O T W tJ Y E -,5 a Y m L U N O > > Y � N N L rL O > •r W C Y OL W E d I- ac m o•r a m £ u o � N O Y E L 'o a L N W � C 0 SO N L > Y O O C C u a •r ar al rn J L � m CL � C d � N N a7 cq O J a > � uv r O u� N m v u v O m N N L L H N E E 0 0 41 41 rn c Y Y E E u u H H 7 -10 £ 0 OC u £ C m 0 L L o W r Y d L U C N L � > •r C O Y in W T C Y T >u L OO L >,— d aY > O v c ac�o m w N O +' E m L > w O N a 0 C a0, d L > Y O •r 'r •rte Y � C � ^ L Y al N O d N � N 41 Q L � Y L v 0 , = m al Cw Y 2 .r 1 E u Y O r 'O � Y J'V > m u m � a7 L C w �cw•r_ a r O 8 W L N V C d m Y N 01 N O 'O 0 c u E C CL •Ij q L N a7 C L a L c0- E n v w O N C N L N a c J N uv O u0 N m £ O T O T X 4J N L. N O m +' m 2 > Nq N C C W orvY L L •Y •r c� V > C Y L JO a7 r N CA J > OL �am+v a7 CL 0 N N to q a) T £ Y L •r m L r N r,- 10 r= N V N a7 N L •c cE a, o L 0a 0 0 C m CL O Im c L L " a O � O W L O C Y 1 0Ymo 1 aEi £ D£ fA Y E I 1 I 1 o s a O £ � £ N N L N a7 m L L E W 0 O E 0 Y C E 7 C C L •r F1 N V N C N ar o� cu�n ap.I�1 1 I I ►-IC V N C u 8.0 REFERENCES h of northwest portion of Encinitas 1991, copy rig Aerial Fotobank Inc., 1992• Aerial photograph flown 12 JanuarCardiff By the Sea, California; negative No. release to Curtis Scott Englehorn and Associates, California. San Angus McDonald 1981. Enhancement of Coastal A riculture . ald and Associates, California ssion. Coastal Comm Francisco: specific Plan Traffic Austin-Foust��Associates, Inc., 199 Y "Encinitas REncin as, California. Study. Prepared for the city of Encinitas, California- San 1973, Soil Surve of the San Diego Area Bowman. Roy H•, artment of Agriculture Soil Conservation Service. Diego: United States DeP Encinitas Acoustician, 1993. "Report on an Acoustical Study, Berry, James C., prepared for Curtis Scott Englehorn and Associates, Ranch Specific Plan." California. Cardiff by the Sea, 1992. Final Environmental IControl a Pro'ectr Brian F. Mooney Associates, and Flood artment of Planning and Community Olivenhain Road Widenin Reali nment Encinitas: City of Encinitas Dep Development. 1993. Past and present Christopher C., Manager CarltaE Company, Correspondence to Calkins, roduction for Ecke Encinitas Ranch* the Sea, California. agricultural p Cardiff by Curtis Scott Englehorn and Associates, Government Code Section 51200 et seq. in Property Taxes Law Guide 3801 -3834. California Land Conservation Act of 1965, or Williamson Act, Provisions S Prepared for the Chang, Howard H., 1991, "Drainage Study for Encinitas Creek." City of Carlsbad, Carlsbad, California. Title 14 of the of Carlsbad, 1987. "Chapter 21.90, Growth Management." City Carlsbad, California. Carlsbad Municipal Code, of Carlsbad, 1990. Local Facilities M B ement Plan for Zone 12 Southwest City Carlsbad: City o La_ C= s =a' Noise Abatement and City of Encinitas, 1993- Municipal Code Chapter 9.32► Control. City of Encinitas, Encinitas, California. al Code Chapter 30.40, Performance standards is, Drainage/ City of Encinitas, 1993• Municip Grading /Erosion Control, Relating to Noise, Toxic Materia Airborn Pollutants. Municipal Code Chapter 23.24 (Ordinance No.88 -16) Erosion and Sediment City of Encinitas, 1993- Control. City of Encinitas, Relating to Grading, Encinitas, California. City of City of Encinitas, 1989' Enc initas General Plan. Encinitas: y Encinitas. Davis: University of Close, Daniel H., 1970- Climates of San Diego County. California Agricultural Extension Service. Status of Sheriff's Department, 1993. Cole, Dennis, Lieutenant San Diego County Cardiff current and future police protection service for Encinitas area. Telephone conversation with Curtis Scott Englehorn and Associates, by the Sea, California. 8 -1 Coleman Planning Group, 1993. Depart y2-15 /SUP 92 -05 /GPA 93 O1. Carlsbad: City Carlsbad Department. Pla nina Coleman Planning Group, 1993. Final Environmental Impact Re Port for Highlands Case No 89 -291. Encinita Leucadia s: City of Encinitas Planning and Community Development Department. Constance A. Willens & Associates, 1993. Final Environmental Im a act Report... Home De of Specific Plan and Tenta . -. Encinitas : City of Encinitas Planning and Community Development Department. Cotton /Beland /Associates, Inc. and Westec Services, Inc. 1987. Master Environmental Assessment Cit of Encinitas. Encinitas: City of Encinitas. Cotton /Beland /Associates, Inc., 1988 updated. Final Environmental Impact Report for the Encinitas General Plan and Zoning Ordinance. Encinitas: City of Encinitas. Curtis-Scott Englehorn, 1978. ` its -i -z Department of Plannning ning annd d Land Use. .' San Diego: County of San Diego Curtis Scott Englehorn, 1980. Final Focused Environmental Im act Report for the House of Mazda Property .4 P80- 10 /EAD 80 7 12. San Diego: County of San Diego Department of Planning and Land Use. Department of Agriculture, 1991. Annual Crop Report 1991. San Diego: County of San Diego Department of Agriculture, Weights and Measures. Department of Planning and Land Use, 1984 amended. San Dieguito Land Use Plan County of San Diego Local Coastal Program, Supplement to the San Die Quito Community Plan and San Dieao County General Plan 1995. Adopted GPA 84 -03 July 21, 1982; first amendment GPA 84 -03 December 19, 1984. San Diego: County of San Diego. Department of Planning and Land Use, 1986 amended. Part VI, Scenic Highway Element, San Diego County General Plan. Adopted GPA 76 -03, January 9, 1975; amended GPA 86 -03, December 10, 1986. San Diego: County of San Diego. Department of Planning and Land Use, 1987 amended. Part VI, San Dieauito Community Plan San Dieao County General Plan 1990. Adopted GPA 74 -02, December 31, 1974; sixteenth amendment December 16, 1987. San Diego: County of San Diego. Department of Planning and Land Use, 1990 amended. Part II, Regional Land Use Element, San Dieao County General Plan. Adopted GPA 78 -03, January 3, 1979; amended GPA 90 -02, August 1, 1990. San Diego: County of San Diego. Department of Planning and Land Use, 1992 updated. The Zoning Ordinance San Diego County. Ordinance No. 5281 (New Series), adopted October 18, 1978 as updated. San Diego: County of San Diego. Dudek & Associates, August 1992. "Conceptual Plan for Water Reclamation Facilities and Distribution System." Prepared for the San Elijo Joint Powers Authority, Carlsbad, California. Dudek & Associates, September 1992. "Encinitas Sanitary District Sewer Master Plan." Prepared for the City of Encinitas, Encinitas, California. 8 -2 Encinitas Fire Protection District, 1990 revised. "Encinitas Fire Protection District Strategic ncin as P California. ared for the Encinitas Fire Protection District, E Engineering Science, September 1985. "Planning Study, Leucadia County Water District." Prepared for Leucadia County Water District, Carlsbad, California. Hydro logy Erosion, Water Quality F.C. Springer & Associates, 1993. "Grading, H Y gY� Assessment o Assoc ates,Ranch f ific Curtis Scott Englehorn and Fontanesi, F.D., General Services Director, Olivenhain Municipal Water District, service nd 1992 -193. Status of existing a ehorn and Associates, Cardiff lbylthe Correspondence Sea, California. F Encinitas Union School District, 1993. Frederick, Gene, Facilities Manager, Status Of current and Associates, Cardiff by the SeorrCalifornia . to Curtis Scott Englehorn to Geyer Associates, ctu on to other Uses rallLand andi is Conyers Public •" Framework Prepared foraCarltas Agr Company, Carlsbad, California. Goldman, George, 1979. Re ional Economic Im acts of Resource Use: An Economv of InterindinttheAAariculturalhsector. BerkeleySanUniversitynof California Chan es Cooperative Extension Service. Hall, Eric J., Administrative atusrvofl existing and fuutureltschool n facilities• District, Scott Englehorn and Associates, Cardiff by the Correspondence to Curtis Sea, California. Associates, August 1990. "San Dieguito Water District Water John Powell & Ass Prepared for the San Dieguito Water District, Encinitas, Master Plan." o California. 1993. Status of current and Johns, Steele, Manager, Hartson Medical Services, future emergency medical service for San Diego County Service Area 17. Telephone conversation with Curtis Scott Englehorn and Assoicates, Cardiff by the Sea, California. Kubota, o Gordon L JollaB• Copley c International Corporation. in San-Die-9-0 An Eonomic Analysis )f C � Letsch, Eure. "lpreparedgforuthe City OfaCarslbadTP lann ng Departm nt,iCarlsbad, Fut California. Leedshill- Herkenhoff, Inc., 1993. "Leucadia Boulevard Alignment Study." Prepared for City of Encinitas Engineering Department, Encinitas, California. Mapping Section, 1987 amended. County of San Dieao Scenic 6, 19 �• System (Map). Adopted January 9, 1975; fifth amendment December 16, 1987. an Diego: County of San Diego. Mapping Section, 1988 amended. Resource Conservation Areas. Adopted GPA 79 -02, December 19, 1979; fourth amendment GPA 88 -03, December 14, 1988. San Diego: County of San Diego. 8 -3 Mapping Section, 1990 updated. Agricultural Preserves. Updated 1990. San Diego: County of San Diego. Mapping Section, 1990 amended. Regional Land Use Element Map. Adopted December 5, 1967; thirty -fifth amendment GPA 90 -02, August 1, 1990. San Diego: County of San Diego. Mapping Section, 1990 amended. San Dieguito Community Planning Area (Map). Adopted GPA 74 -02, December 31, 1974; seventeenth amendment GPA 90 -01, March 7, 1990. San Diego: County of San Diego. M.F. Ponseggi & Associates, 1990. Final Environmental Impact Report for Arroyo La Costa Master Plan. Carlsbad. City of Carlsbad Planning Department. M.F. Ponseggi & Associates, 1993. Draft Environmental Impact Report for Shelly Tract Map. CT 90 -3 /HDP 90- 11 /PUD 9 Carlsbad Planning Department. 0 4 /SUP 90-4. Carlsbad: City of Michael Brandman Associates, 1990. Final Environmental Impact Report for San Marcos Landfill Expansion Protect. San Diego: County of San Diego Department of Public Works. Mullender, John W., Vice President /Business Services, MiraCosta College District, 1993. Status of existing and future school facilities. Correspondence to Curtis Scott Englehorn and Associates, Cardiff by the Sea, California. Ninyo & Moore, August 1992. "Limited Geotechnical Evaluation, Encinitas Ranch Specific Plan and Leucadia Boulevard Alignment, Encinitas, California." Prepared for Curtis Scott Englehorn and Associates, Cardiff by the Sea, California. Ninyo & Moore, August 1992. "Phase I Environmental Site Assessment, Encinitas Ranch, Encinitas, California." Prepared for Curtis Scott Englehorn and Associates, Cardiff by the Sea, California. P & D Technologies, 1992. "Green Valley Master Plan." Prepared for Carlsbad Partners, Ltd., Dallas, Texas. Planning Department. 1990. General Plan Land Use Map Citv of Carlsbad. Carlsbad: City of Carlsbad. PRC Toups Corporation, 1980. City of Carlsbad Local Coastal Program Technical Support Paper. Aariculture. San Francisco: California Coastal Commission. Resources Agency, 1991. California Code of Regulations Title 14 Natural Resources. South San Francisco: Barclays Law Publishers. Rischman, Ralph, Manager Thornton Nursery, 1993. Past and present agricultural production for Thornton property. Telephone conversation with Curtis Scott Englehorn and Associates, Cardiff by the Sea, California. San Diego Association of Governments [SANDAG], 1988. Final Series 7 Regional Growth Forecast Land Use Inputs. San Diego: San Diego Association of Governments. San Diego Association of Governments [SANDAG], 1991. 1990 Regional Transportation Plan. San Diego: San Diego Association of Governments. Scientific Resource Surveys, October 1992. "A Cultural and Paleontological Resource Investigation of the Encinitas Ranch, San Diego, California." Prepared for Curtis Scott Englehorn and Associates, Cardiff by the Sea, California. 8 -4 Inc., 1993. ,Subsurface Testing and Historical Scientific Resource Encinitas, San Diego Cardiff Cbyl the nSea, Surveys, Assessment OfCurtis1 Scott aEnglehorn and Associates, prepared California. Paper for San Diego A Technical Support Pap "A riculture, of San Diego Spellman, Maxene, 1979. g prepared for County County's Local CoastalaProgram." and Use, San Diego, California. Department of Planning University of Strong, David, 1979• Carlsbad Re ort Part I. Berkeley: California Cooperative Extension Service. „Biotechnical Report for Sweetwater Environme October 1993. California." Prepared for Curtis Scott ntalEncin pasts, California. Encinitas Ranch, Cardiff by the Sea, Englehorn and Associates, ecific Plan." T &B Planning Consultants, Inc., 1993. "Draft Encinitas 1 fornia Ranch'Sp Prepared for Carltas Company, Carlsbad, U.S. Army Corps of Engineers and City of Carlsbad, 1990- Batiouitos Laaoon Enhancement Pro'ect Final Environmental Im act Re ort artmen�ental 11 Impact Statement. Carlsbad: City of Carlsbad Planning Dep U.S. Geologic Survey, 1975. Encinitas uadran le 7.5 Minute Series. Denver: U.S. Geologic Survey. Planner, North County Transportation District, 1993• Assistant Wasdahl, Mark, North transportation service for Encinitas. Status of current and future p City of Encinitas. Correspondence to Alcina Crull, Westec Services, Inc., 1981. uail Gardens Unit 1 Final county onofn San IDiego R12, ort TM 3526/P81- 025 /EAD 81 -7 -26. San Diego: Department of Planning and Land Use. irt Final Westec Services, Inc., 1986. Pacific Rim Countr r Club of Carl sbado Planning Environmental Impact Report. Carlsbad: City Department. 1993. Williams, Dan, Engineering Supervisor, Times Mirror Cable Tel Correa ondence Status of cable television service in the Encinitas area. to Alcina Crull, City of Encinitas. 8 -5 9.0 ORGANIZATIONS AND PERSONS CONSULTED The following organizations, agencies, and persons were consulted in the preparation of this environmental document North county Transit District Batiquitos Lag oon Foundation Mark Wasdahl Seth Schulberg OLivenhain Municipal Water District Alan Thum Frank Fontanesi California Coastal Commission pacific Bell Debrah Lee Nancy Downs Lee McEachern Sherily Sarb Quail Botanical Gardens Foundation California Department of Conservation Caroline Stabile Office of Land Conservation San Diego Gas and Electric California Department of Fish and Game Don Altevers Jim Dice San Elijo Lagoon Conservancy Terry Dickerson Gregory Dennis Tim Dillingham Trey KeLLY San Diego Air Pollution Control District David Lawhead Morris Dye Terri Stewart Curt Taucher San Dieguito Water District California Reg Tonal Water Quality Control Board Victor Graves San Diego Biodiversity Project CaLTrans David Hogan AL Cox BILL DiLLon San Dieguito Union High School District Eric J. Hall Caritas Company Christopher Calkins Lizbeth Ecke San Elijo Lagoon Conservancy Kevin Johnson John White Department San City of Carlsbad Planning Diego Gas and Electric Christer Westman Grace Turner County of San Diego San Diego Associations of Governments Environmental Health Division Land Use and Public Facilities Planning Department of Parks and Recreation onservancy Use Department of Planning Santa Monica Nature C a Paul Ettleman Daniels Cablevision rtment T$B Planning Consultants Construction Depa Douglas Boyde Encinitas Union School District Mark Hickner Gene Frederick Times Mirror Cable Television Encinitas Sanitation District Dan WiLLiams Sandy Vinocur U.S. Fish and Wildlife Service Gerry Jackson LAFCO Carrie Phillips Joe Convery Brad Roberts Leucadia County Water District U.S. Post Office Los Encinitos Heritage Conservancy George Taylor Julie Fisher U.S. Army Corps of Engineers MHCP Project Clearinghouse David zoutendyk Elizabeth White Rick Alexander MiraCosta College YMCA John Mullender Susan Hight NCCP Program Manager Larry Eng 9 -1 10.0 DOCUMENT PREPARERS This environmental document was prepared under contract for the City d Encinitas lehorn and Associates, Post Office Box All Cardiff d The by Curtis Scott Eng 619 436 -3296. All work was conducted California 92007• Telephone number (619) Manager, and Patrick S. Murphy, Sea, 505 South Vulcan under the supervision of Alcina t Of Telephone number (619) 633 -2680• Director of Community al elo ma n 92024. City of Encinitas, Avenue, Encinitas, Subconsultants and their contribution to the document follow* Traffic Analysis Austin -Foust Associates, Inc. 2020 North Tustin Avenue Santa Ana, California 92701 (714) 667 -0496 Terrance W. Austin F.C. Springer and Associates Civil Engineering 1525 South Escondido Avenue, Suite B Escondido, California 92025 (619) 480-'4840 Frank C. Springer James C. Berry, Acoustician 2401 Trace Road Spring Valley, California 91978 (619) 660 -0064 James C. Berry Ninyo 6 Moore Geotechnical and Environmental Sciences Consultants 10225 Barnes Canyon Road, Suite A -112 San Diego, California 92121 (619) 457 -0400 Phillip S. Rosenberg /Clifford A. Craft Scientific Resource Surveys, Inc. Post office Box 4377 Huntington Beach, California 92605 (714) 898 -7877 Nancy Whitney- Desautels /Matthew A. BOXt Sweetwater Environmental Biologists, Inc. 3545 Camino del Rio South, Suite D. San Diego, California 92108 (619) 284 -4165 Barry L. Jones /John J. Messina Woodward -Clyde Consultants, Inc. 1550 Hotel Circle North San Diego California 92108 (619) 294 -9400 Veronica J. Hoban /Ushma Shah Planning Systems 2111 Palomar Airport Road, Suite 100 Carlsbad, California 92009 (619) 931 -0780 Steven M. Ahles f his The undersigned hereby certifies to the best o statements contained in this document aof corrproject f the on personal knowledge and linspectio n facts. well as an assembly ��_ by: �C l Curtis Scott Englehorn, Principal Consultant 10 -1 Hydrology and Water Quality and Grading and Erosion Study Acoustical Study Geotechnical and aPhase I Environmental Site Assessment Cultural and Paleontological Resource Investigation Biological Resource Investigation Air Quality Analysis Visual Simulations knowledge and belief, the The opinions herein are based site and surroundings, as 1333 OZ lVAH31N1 af101N00 N313WO11>r I 0 _ __ 1331 000[ 0009 OOOS 000> 000E 0002 OOOI 311W 1 0 OOOI 0 i 000 VEJ 31VOS ' 1 7'I� ,J I� Irav_Iti sia.v.rs' .LIIDI'INOO1V `,.' 1 5 �,4Vled AJUn00 `0 1 `1lt Uep,eO apis Iled )\ 1 1 v +, 1.� a { �D rn jy' i11 U ro b ro ro 4) .r., 4J N B A 0 toy � U a N bm (n a 0 +i > N a Gl ro •ri .q U 0 d +i •$4 b Id •ro N c � rt 4+ (d x 1:414 a , O 10> CC A 0?1 U b k -4 0roa ,1r-i0 ro a ro 000ro11014 .4 14 3.i ri aaacaEnoxacnc� a aa) �i 0 ri N M cM 1f1 t0 1� 00 m H •^1 W Irav_Iti sia.v.rs' .LIIDI'INOO1V `,.' 1 5 �,4Vled AJUn00 `0 1 `1lt Uep,eO apis Iled )\ 1 1 v +, 1.� a { �D r, . fi� W x % A��( ji!ID eaS Vr yl rl im lu .-S L 12 JiN f IlaVati A.LVLLS �.Llm jA(,, Aq L V (1v us, I It v.1" C 00 Ln En 4-) 4J rn 4-) 4) 0 'r4 4J $4 V �4 .r.1 124 $4 (D 4) 44 41 04 "1 0 •rf k >4 0 a4 V 4) Co 4J $4 4J (d 4) 93 04 04 LO 14 0 4) 0 0 a) 4) 14 E-1 $4 41 �4 4J 04 a4 tm ro a :3 4J .14 (d Ul 93 0 44 cd A (d :3 54 m v >4 m a, N m r-I 1333 OZ -lVAd31Nl anOINOZ) 0 OD ODDI 0009 0001 000z 0001 0 ODUI 311. i 0 000bzl 31VOS r, . fi� W x % A��( ji!ID eaS Vr yl rl im lu .-S L 12 JiN f IlaVati A.LVLLS �.Llm jA(,, Aq L V (1v us, I It v.1" C 00 Ln