PERMFILE125987

• Permit No: C1984062
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: EXHIBIT 3 SEDIMENT CONTROL PLAN
• Media Type: D
• Archive: No

• Tahle TR 90-06-4
(continued)
SEDIMENTATION POND "M3-S" - DESIGN CALCULATIONS
Equivalent Peak Discharge (cfs @ 151.0 cfs/inch runoff)
10 year-24 hour 64.93
25 year-24 hour 90.60
100 year-24 hour - 151.00
Actual Peak Discharge (cfs)
10 year-24 hour 62.30
25 year-24 hour 86.93
100 year-24 hour 144.88
Runoff Volume (acre-feet)
10 year-24 hour ~ 6.81
• Universal Soil Loss Equation Parameters
Rainfall Factor (R) 30
Soil Erodibility Factor (K) 0.32
Topographic Factor (LS) 13.75
Cover and Crop Management Factor (C) 0.36
Erosion Control Practice Factor (P) 1.00
Soil Loss (tons/acre/year) 47.52
Sediment Delivery Ratio C.39
Sediment Yield (tons/acre/year) 18.53
Three Year Sediment Yield (acre-feet @ 80.31bs/ft3) 6.0
Storage Volume (acre-feet) 25.4
• Design Pond Capacity (acre-feet) Cg•2
(based on ;year sediment yield + storage
volume l :0 year-24 hour runoff volume)
Ma on_nF Exhibit 3 - 21 11/16/90