PERMFILE49793

• Permit No: C1982056
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: EXHIBIT 08 TAB 2.2 E Ditches Design
• Media Type: D
• Archive: No

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TABLE A
DESIGN SPECIFICATIONS
SEDIMENT PONDS D, E, F, AND G
Ditch E-1 E-2 E-3 Direct Runoff

Design Event (24-hour) 10 10 10 10
Rainfall Event (inches) 1.8 1.8 1.8 1.8
Runoff (inches) --- --- ---
Watershed (acres) 18.32 10.29 1.80 13.41
Curve Number 89 89 80 89
Runoff (acre/feet) 1.32 0.74 0.07 0.97
Additional Volume (acre/feet) 0.00 0.00 0.00 0.00
Total (acre/feet) 1.32 0.74 0.07 0.97
Peak Runoff Flow (cfs) 14.44 7.25 0.89 12.16
Additional Flow (cfs) 7.25 --- 0.00 0.00
Total Peak Flow (cfs) Z 1.69 7.25 0.89 12.16
Slope (min/max) I%/ 1% 1%/ 12.5% I%/ 1%
Side Slope (v:li) 2:1 2:1 2:1
Width at Bottom (feet) 3.0 3.0 0.0
Depth (feet)/Freeboard 1.50 1.03 I.0
Manning Coefficient 0.035 0.035 0.035
Full Flow (cfs) 34.63 17.24 4.97
Velocity at Full Flow (fps) 4.05 3.31 2.48
Depth of Peak Flow (feet) 1.20 0.73 0.52
Velocity at Peak Flow (fps) 3.G0 2.75 1.62
NOTE: Depth of Clow determined from minimum slope. Riptap size determined from maximum slope.
TAB. 2.2, PG.1
51 ~' ~V ~sC~, ~ T••S 2. Z
Permit Renewal No. 3 ~,~„~,~,,, „ ~~ ~-; I I/I/99