2002-7556 GNoText
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Resource
Development JN01-0288
Corporation June 24, 2002
CIVIL ENGINEERING • SURVEYING • PLANNING Page 1 of 4
C
A NNED
HYDROLOGY AND DRAINAGE DESIGN CALCULATIONS
PROPOSED RESIDENCES FOR MB SHORES CORP
VULCAN AVENUE, ENCINITAS
10 2002 °
EtiG i~E (:'dG SERVICES
Hydrology and Drainage Design Calculations by: lit` of eLCIN1W
RESOURCE DEVELOPMENT CORPORATION ~ BRIAN
~v DONALO m
No. 2,5175 m
* CIVIL
u, Professionai
~P
Brian Donald, RCE 26175 9~`cOF CAL\F'3
License Expires 3/31/06
914 N. COA5T HIGHWAY 101 SUITE E • ENCINITA5, CA 92024 TEL (760) 942-1106 • FAX (760) 942-1146
JOB
RESOURCE DEVELOPMENT CORP.
914 North Coast Highway 101 Suite E SHEET NO. 2 of
ENCINITAS, CALIFORNIA 92024 CALCULATED BY LJIJ DATE o
(760) 942-1106 bdonald@rdc2000.com
CHECKED BY DATE
SCALE
Table 3-1
RUNOFF COEFFICIENTS FOR URBAN AREAS
Land Use Runoff Coefficient "C"
Soil Type
MRCS Elements County' Elements % IMPER. A B C D
Undisturbed Natural Terrain Permanent Open Space 0* 0.20 0.25 0.30 0.35
Low Residential', 1.0 DU/A or less 10 0.27 0.32 ! 0.36 0.41
Low Residential; 2.0 DU/A or less 20 0.34 0.38 0.42 0.46
Low Residential; 2.9 DU/A or less 25 0.38 0.41 0.45 0.49
Medium Density Residential Residential, 4.3 DU/A or less 30 0.41 0.45 0.48 0.52
Medium Density Residential Residential, 7.3 DU/A or less 40 0.48 0.51 0.54 0.57
Medium Density Residential Residential, 10.9 DU/A or less 45 0.52 0.54 0.57 0.60
Medium Density Residential Residential'„ 14.5 DU/A or less 50 0.55 0.58 0.60 0.63
High Density Residential Residential, 24.0 DU/A or less 65 0.66 0.67 0.69 0.71
High Density Residential Residential, 43.0 DU/A or less 80 0.76 0.77 0.78 0.79
Commercial/Industrial Neighborhood Commercial 80 0.76 0.77 0.78 0.79
- Commercial/Industrial, General Commercial 85 0,80 0.80 0.81 0.82
Commercial/Industrial Office Professional/Commercial 90 0.83 0.84 0.84 0.85
Commercial/Industrial Limited Industrial 90 0.83 0.84 0.84 0.85
Commercial/Industrial General Industrial 95 0.95 0.95 0.95 0.95
'The values associated with 0% impervious may be used for direct calculation of the runoff coefficient as described is Section 3.1.2 (representing the pervious
runoff coefficient, Cp, for the soil type), or for areas that will remain undisturbed in perpetuity. Justification must be given that the area will remain natural
forever (e.g., the area is located in Cleveland National Forest).
DU/A dwelling units per acre
NRCS National Resources Conservation Service
PRODUCT 204-1 (Single Sheets) 205-1 (Padded)
JOB C>L- DGrCJ.
RESOURCE DEVELOPM NT CORP. ~y
914 North Coast Highway 101 Suite E SHEET NO. J of
ENCINITAS, CALIFORNIA 92024 CALCULATED BY try/ DATE
(760) 942-1106 bdonald@rdc2000.com
CHECKED BY DATE
SCALE
HYDROLOGY CALCULATION 6/24/2002
Parcel 1
Q100 C*I*A
A 0.15 Acres
C 0.51 Per Table 3-1, 7.3 du/acre, Soil Type B
I 6.60 inches/hour (Max intensity for Tc < 5 Minutes, 100 Year)
Q100 = 0.50 CFS
Parcel 2
Q100=C*I*A
A 0.15 Acres'
C 0.51 Per Table 3-1, 7.3 du/acre, Soil Type B
I 6.60 inches/hour (Max intensity for Tc < 5 Minutes, 100 Year)
Q100 0.50 CFS
Parcel 3
Q100=C*I*A
A'= 0.14 Acres
C'= 0.51 Per Table 3-1, 7.3 du/acre, Soil Type B
I' = 6.60 inches/hour (Max intensity for Tc 5 Minutes, 100 Year)
Q100 = 0.47 CFS
t. r~,~ a 11 3 ~o = i.4-7 LJ7
PRODUCT 204-1 (Single Sheets) 205-1 (Padded)
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