PERMFILE60630

• Permit No: C1981008A
• IBM Index Class Name: Permit File
• Doc Date: 3/13/2006
• From: pg 2.05.3‎(3)‎-10-76 to End
• Section_Exhibit Name: NH2 Section 2.05.3‎(3)‎ Attachment 2.05.3‎(3)‎-10 Part 2
• Media Type: D
• Archive: Yes

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Runoff Curve Number and Runoff 07/25/1999
Project: AMENDMENT By: GL Date: 07/25/99
Location: POND 13 Checked: Date:
Developed
1. Runoff curve number (Cn}
Cover description CN Soil Type Area
DIST ~ 91 D 23.610 Acres
UNDIST 83 D 14.500 Acres
CN (weighted): 88
2. Runoff
Frequency ..............: 25 yr
Rainfall, P (24-hour) ..:2.40 in
Runoff, Q ..............:1.29 in
Runoff Volume ..........:4.11 Acre-Ft
Pond Volume Calculation based on Universal Soil Loss Equation 07/25/1999
input Data
Landuse Area Rainfall Erod- Length Slope Ls Cf Pf
(ft^2)
-------------- Factor
--------- ability
--------- {ft)
-------- (%)
-------------------------------
DIST 1659849.1 24.0
Runoff = 1.290 inch.
Sediment Density = 112.000
Time = 3.0 years
Drainage Ratio = 0.37
0.28 2635.0 13.2 10.79 0.50 1.00
Total Area = 38.105 acres
Gross Erosion = 1381.369 tons/yr.
Total Yield = 511.107 tons/yr.
Runoff Volume = 4.096 acre-ft
Sediment Volume = 0.629 acre-ft
Total Volume = 4.725 acre-ft
(REVISED 1299)
Attachment 2.05.3(3) -10-82