1992-2882 G Street Address
�fC ,
Category Serial #
Name Description
Plan ck. # Year
recdescv
•
• • Civil Engineering
• Land Planning
• Structural
• Surveying
MARCH 2, 1993 1 OF 4
z R£V is eD 7 /Za A 3
HYDROLOGY STUDY
FOR
THE CHAN RESIDENCE
DESCRIPTION:
GRADING PLAN FOR SINGLE FAMILY RESIDENCE
,3805 DUSTY TRAIL
OLIVENHAIN
G.P. NO. 2882 —G
OWNERIPERMITTEE•
/
r�
DR. CRAIG CHAN`�
w c,
2028 BLACKBIRD CIRCLE
CARLSBAD, CA 92009 r C3� -.,r `z ml,t
619 - 431 -8177 xc. ��,; � 6 !
ENGINEER: �q:
LOGAN ENGINEERING
120 BIRMINGHAM DRIVE, /STE 110
CARDIFF, CA 92007 /
619- 942 -8474 /
Z ' 1
.C.E. 39,
EXP. DATE 12 -31 -93
1
120 Birmingham Dr., Suite 110 Cardiff -by- the -Sea, CA 92007 619- 942 -8474
- - �q - P1 2 AO WC CAV i,
�
• ��� �% D Q rOc7 !k2
• ��51�� Q 3A� cis
Diameter ...
(inches) 24 Mannings n ....... 018
Slope (ft /ft) 0.0100 Q (cfs) ........... 3.98
depth (ft) .......... 0.67 depth /diameter ... 0.34
Velocity (fps) ...... 4.29 Velocity head .... 0.29
Area (Sq. Ft.) ...... 0.93
Critical Depth ...... 0.70 Critical Slope ... 0.0086
Critical Velocity ... 4.07 Froude Number .... 1.08
Diameter (inches) ... 24 Mannings n ....... .018 f
Slope (ft /ft) ....... 0.1600 Q (cfs) 3.98
depth (ft) .......... 0.33 depth /diameter ... 0.17
Velocity (fps) ...... 11.49 Velocity head .... 2.05
Area (Sq. Ft.) ...... 0.35
Critical Depth ...... 0.70 Critical Slope ... 0.0086
Critical Velocity ... 4.07 Froude Number .... 4.21
0 ,�
• Civil Engineering
• Land Planning
• Structural
• Surveying
MARCH 2, 1993 � ,(
1 OF �}
HYDROLOGY STUDY
✓ `" FOR
THE CHAN RESIDENCE
u�
` DESCRIPTION•
1 GRADING PLAN FOR SINGLE FAMILY RESIDENCE
3805 DUSTY TRAIL
OLIVENHAIN
G.P. NO. 2882 -G
OWNER /PERMITTEE•
DR. CRAIG CHAN
2028 BLACKBIRD CIRCLE
CARLSBAD, CA 92009
619 -431 -8177
ENGINEER•
LOGAN ENGINEERING
120 BIRMINGHAM DRIVE, ST 110
CARDIFF, CA 92007 �%
619 - 942 -8474
Z
MAR 0 2 199 E DATE 12-31-93
ENGIN EERING Y OF ENG NT E
AS
120 Birmingham Dr., Suite 110 • Cardiff -by- the -Sea, CA 92007 • 619- 942 -8474
CO JAI V �� PE -5 16J 4 TQOM PuiZG M AVIV Art,%%
2 U IZAti
o lo o =
too
A z ct Ac - 41
MIS
R loo
o L�-
• C� -If�K CAt(��CIT� � �cJ - LET VELOCITY 0 �
D Q►00 1i2 Gk�t S m .
Diameter (inches) ... 24 Mannings n 018
Slope (ft /ft) ....... 0.0100 Q (cfs) ........... 3.98
depth (ft) .......... 0.67 depth /diameter ... 0.34
Velocity (fps) ...... 4.29 Velocity head .... 0.29
Area (Sq. Ft.) ...... 0.93
Critical Depth ...... 0.70 Critical Slope ... 0.0086
Critical Velocity ... 4.07 Froude Number .... 1.08
I
Diameter (inches) ... 24 Mannings n ....... .018
Slope (ft /ft) ....... 0.1600 Q (cfs) ........... 3.98
depth (ft) .......... 0.33 depth /diameter ... 0.17
Velocity (fps) ...... 11..49 Velocity head .... 2.05
Area (Sq. Ft.) ...... 0.35
Critical Depth ...... 0.70 Critical Slope ... 0.0086
Critical Velocity ... 4.07 Froude Number .... 4.21
I
T) - 1 15 0/ 1 4 - fO4 RIP. R Arp
4 o ��
(-AA4 La-
i
TABLE 2
RUNOFF COEFFICIENTS (RATIONAL METHOD)
DEVELOPED AREAS (URBAN)
Coeffic C
Soil Group (1)
Land Use
A 8 _ C — D
Residential:
- Single Family .40 .45 .50 .55
Multi -Units .45 .50 .6o .70
Mobile homes .45 .50 _.55 ..65
Rural (lots greater than 1/2 acre) .30 ..35 .40 .45
Commereia1( .70 .75 .80 .85
80% Impervious
Industrial ( 080 .85 .90 .95
90% Impervious r
NOTES:
(I) Soil'Group mans are available at the offices of the Department of Public Works.
( actual conditions_ deviate significantly from the tabulated impervious-
ness values of 80% or 90%, the values given for coefficient C. may be revised
by multiplying 80% or 90% by the ratio of actual imperviousness to the
tabulated imperviousness. However. in no case shall the final coefficient
be less than 0.50. For example : - Consider commercial property on D soil. group.
Actual imperviousness 50X
Tabulated Imperviousness 80X
Revised C • x 0.85 • 0.53 . •••
so
IV A -9
APPENDIX IX -B
Rev. TX-
Iy EQLIAT /ON
reef Tc • C /_l •3Bs
5000 JF • Eire cr/ tcv�cenl�}ias
fDDO ' Len 1h of *wleerhod
'H • A/l�ere�sce !n dem/'ibn a/cv,9
3000 Al- Ke&I'e ?/o.QG AM <SW A40CIA&)r YB)
L
.Ni /es Fief �f/arira Minafe:
2000 4 2!40
/000 /O
\ 900
BOD 1 /10
700
Z see
BO
740
� SD
?G10 \ 2
• oo / � soon
DO PO
/e
30400 /6
• So QS \ /s
/O ?000
m Narm
���a �.•aa
/100
lro NATURAL MATERSIMS e
10 ADD TEN MWUTES TO /ODD 7
COMPUTED TIME OF CON- 9400
CENTRATION_ 40
600 •S
/O S00
. f00
3w
3 I
5
talc
H �
• SAN DIEGO COUNTY NOMOGRAPH FOR DETERMI
DEPARTMENT OF SPECIAL DISTRICT SERVICES OF TIME OF CONCENTRATION (T j
DESIGN M AN A L FOR NATURAL WATERSHEDS
APPROVED DATE - 4 1 1 1 41 APPEND 1 X x -A
-A -10 Rev. S /81
A= the roilowing table to Section 200 -1.6 (Page I) in the Standard Sp=�
Provisions.
Selection of Riprap and Filter Blanket Material � � �-
1 _
. Filter Blanket 3)
I Velocity Rock Riprap tion Option 2 tion 3 Lc
P ::.r
} Ft /Sec, 1), Class(2 Thickness T 4)Sec.200, 4)SSC.400 ! (S) ,. -_� '
i
�G6K�r4TE L` 5Z
6 -7 A'o.3 Back= .6 3/16"
f C2 D. C.
`
in
i
• , 7 -S ' ho. 2 Back- 1.0 0 1 /4.. E3 U. G. ,
in - �
8 -9 Facing 1.4 3/8" }
- D. G. -
9_5 -11 Light 2.p 1/211
_ 3
-11-13 '%, Ton 2.7 3/4" _ .. `
�.. .... S
1 13 - 1S Ton 3.4
4R P.B. "
15 -17 1 Ton 4.3
2 Type B Sari
17 -20 2 Ton S.4 2" _ .. to c
Sand
P �o.n 6.'na Pion o f� d c FJ .Ss►,r,� _ /f T
tactical use of this table is li_tcd to -•moo_ .
sit:i._t_o-; ,e T is less than D.
No zS :
(1). Average velocity in pipe or bottom velocit n r
� i.. en..rgy dissipator,uhi cz-
ever is greater. (See "Riprap. Selection M :ethods ", D. S&FC, County of S.D.)
i
( If desired riprap and filter blanket class is rot available, use
larger class.
Filter blanket thickness 1 Foot or T, whichever is less.
(4)- Standard specifications for public works construction of Southern Cali-
fornia Chapter of API'M and 4GC. See-
(5). D. G. = Decor-posed Granite, 1 t-.'\t to 10
P. B: = Processed Miscellaneous Base
Type B = Type.B bedding material, usually available locally
7S% crushed particles, 100% passing 2:" sic:e, 10% passing 1" sieve)
( Sand 7S% retained on 8200 sieve
'0 V- N O w
C O +• 4J QJ
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