PERMFILE118993

• Permit No: C1980006A
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Doc Name: DRAINAGE & SEDIMENT CONTROL PLAN
• Section_Exhibit Name: EXHIBIT 42
• Media Type: D
• Archive: Yes

• SEDIMENT POND HYDROLOGY AND SEDIMENTOL06Y CALCULATIONS
SEDIMENT POND E
Drainage Area (acres)
Maximum Elevation (ft)
Minimum Elevation (ft)
Drainage Height (ft)
Hydraulic Length (ft)
Average Slope (%)
Slope Adjustment Factor
Sub Area Acres
s ur ed X32
Undisturbed B 4.55
Undisturbed C 132.63
Average Curve Number
Average Runoff (in)
10-year, 24-hour event
25-year, 24-hour event
100-year, 24-hour event
• Equivalent Area (acres)
Equivalent Peak Discharge (cfs/in)
Actual Peak Discharge (cfs/in)
Peak Discharge (cfs)
10-year, 24-hour event
25-year, 24-hour event
100-year, 24-hour event
Runoff Yolume (acre-ft)
10-year, 24-hour event
25-year, 24-hour event
100-year, 24-hour event
Sediment Yolume (acre-ft)
Pond Capacity (acre-ft)

170.4
8,342
8,165
177
4,800
3.7
1.00
Curve Nu
78
87
89
0.78
1.03
1.45
185.8
115
105.5
82
109
153
11.1
14.6
20.6
3.3
14.4
23-23