PERMFILE128733

• Permit No: C1981008A
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Doc Name: Pond 11 & Pond 12
• Section_Exhibit Name: NH2 1996 Section 2.05.3‎(3)‎ Attachment 2.05.3‎(3)‎-10 Part 5
• Media Type: D
• Archive: Yes

•
Runoff Curve Number and Runoff
Project: AMENDMENT By: GL
Location POND 12 S Checked:
Develop
Doc Date:12111/2001
III III'IIIII"II'll
07/25/1999
Date: 07/25/99
Date:
1. Runoff curve number (Cn)
Cover description CN Soil Type Area
DIST 89 C 23.180 Acres
UNDIST 80 C 10.000 Acres
CN (weighted): 86
2. Runoff
Frequency ..............: 25 yr
Rainfall, P (24-hour) ..:2.40 in
Runoff, Q ..............:1.18 in
Runoff Volume ..........:3.27 Acre-Ft
Pond Volume Calculation based on Universal Soil Loss Equation
07/25/1999
Input Data
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Landuse Area Rainfall Erod- Length Slope Ls Cf Pf
(ft^2) Factor ability (ft) (%)
DIST 1473949.0 24.0 0.30 1995.0 10.8 6.84 0.50 1.00
Runoff = 1.180 inch.
Sediment Density = 112.000
Time = 3.0 years
Drainage Ratio = 0.37
Total Area = 33.837 acres
Gross Erosion = 833.601 tons/yr.
Total Yield = 308.432 tons/yr.
Runoff Volume = 3.327 acre-ft
Sediment Volume = 0.379 acre-ft
Total Volume = 3.707 acre-ft
(Revised 12/00)
Attachment 2.05.3(3) -10-59