2008-01-24_PERMIT FILE - C1981020A

• Permit No: C1981020A
• IBM Index Class Name: Permit File
• Doc Date: 1/24/2008
• Section_Exhibit Name: Tables 2.1-1 to 4.1-5
• Media Type: D
• Archive: Yes

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TABLE 3.9-3
DRAINAGE BASIN SUMMARY
4~t=rr LgNEt(T=~* Yarc., u~tc~' e~ t~N ,roi~~ ~~~t ~` e~i~a
A 45.11 2240 5475 6345 870 47%
B 3.99 1050 5575 6100 525 59%
C 4.41 1160 5550 6150 600 59%
D 15.5 2020 5525 6345 820 43%
E 33.09 2200 5650 6480 830 40%
F 1.87 810 5650 5950 300 - 80%
G 5.18 1012 5700 6040 340 34%
H 57.45 3040 5700 6720 1020 34%
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B 6-9"
C 6-9"
D 12"
E 6-9"
E&F 6-9"
F 6-9"
G 6-9"
H 15"
Peak Discharge for Reclaimed Ephemeral Channels
(Reclaimed Upper Road and Portal Bench)
I • Permanent Channels information located on Figures 3.1-5, 3.1-6, 3.1-7, and 3.9-11
PEAK FLOW CALCULATIONS for 10-year 24 hour event = 1.5 inches
Cover = 43.3% Veg + 24% Litter = 67.3% (Fair Cover) Juniper/Grass - Soil C CN=73
DITCH DESIGN Trapezoidal Ditch All soils are stiff wlloidial day except for ditch A which is wlloidial-alluvial silt
Water will contain wlloidial silts for the high flow events typical in this area.
Vmax for both soil types will be 5.0 fps.

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A 9 100 9.0% 0.035 1H:1V 4 0.20 1.29 0.27 7.35 5.80
B 32 140 22.0% 0.035 1H:1V 1 0.07 0.07 0.06 5.93 0.51
C 32 140 22.0% 0.035 1H:1V 2 0.05 0.17 0.07 5.09 0.57
D 40 150 27.0% 0.035 1H:1V 2 0.05 0.35 0.14 8.44 1.99
E 26 215 12.0% 0.035 1H:1V 4 0.13 0.93 0.2 6.54 4.26
F 28 110 25.0% 0.035 1H:1V 0.5 0.05 0.08 0.09 4.67 0.24
E8iF 10 70 14.0% 0.035 1H:1V 5 0.16 0.80 0.15 4.48 4.48
G 46 140 33.0% 0.035 1H:1V 2 0.04 0.17 0.07 5.96 0.67
H 90 490 20.0% 0.035 1H:.5V 3 0.12 1.56 0.21 6.86 7.39
RIPRAP SIZING:
TR-23 09/07