PERMFILE114574

• Permit No: C1982056
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: EXHIBIT 08 TAB 2.1 D Ditches Design
• Media Type: D
• Archive: No

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TABLE A -/~
DESIGN SPECIFICATIONS D~ ' I// ~ ~2~~ ~/O~
SEDIMENT PONDS D, E, F, AND G
Di[ch D-1 D-2 D-3A D-38 D-4 D-6(a) D-6(b)
Design Even[ (24 hr/yr) 10 10 10 10 10 10 10
Rainfall Event (inches) 1.8 1.8 1.8 1.8 1.8 I.8 1.8
Runoff (inches) 0.4 1.0 -- -- 0.2
Watershed (acres) 94 4.9 43 331 250 1.2 1.2
Curve Number 73 90 80 80 70 85 85
Runoff (acre/ft) 2.07 0.3 1.59 12.27 0.7 0.1 0.1
Additional Volume (acre/ft) -- 3.3 0.00 0.00 -- -- --
Total (acre/ft) 2.07 3.6 1.54 12.27 0.7 0.1 0.1
Peak Runoff Flow (cfs) 13.8 3.4 12.89 58.09 9.3 1.3 1.3
Additional Flow (cfs) -- 1.7 0.00 0.00 -- 0.01 0.067
Total Peak Flow (cfs) 13.8 5.1 12.89 58.09 9.3 1.3 2.3
Slope 0.009 0.010 0.02/0.18 0.01/0.13 0.014 0.01 0.067
Side Slope (v:lt) Parabola 3 :I 3:1 3:1 3:1 2:1 2:1
Width at bottom (feet) Parabola 3 6 G 2 V V
Depth (feet) 1.4 I.5 .051 1.4 2 I 1
Manning Coefficient O.Ol3 0.042 0.035 0.035 0.052 0.035 0.035
Full Flow (cfs) 26.0 37.1 57.4 5.0 12.9
Velocity/Full Flo++•(cfs) 4.9 3.3 3.G 2.5 G.4
Depth of Peak Flow (feet) I.I O.G -- -- 0.9 O.G 0.4
Velocity/Peak Plo+v (fps) 4.2 1.9 12.5 19.1 2.3 1.8 3.8
Channel Lining Soil/Rock Soil/Belt Soil/Belt Soil/Belt Soil/Rock Soil/Rock Soil/Rock
NOTES: Dcptlt o((lo+v determined from minimum slope. Channel lining determined from maximum slope.
TAB. 2.1, PG. 1
Petlrti[ Renewal No. 3 11/1/99
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