2012-05-11_PERMIT FILE - C1981033 ‎(4)‎

• Permit No: C1981033
• IBM Index Class Name: Permit File
• Doc Date: 5/11/2012
• Section_Exhibit Name: EXHIBIT 11 DRAINAGE AND SEDIMENT CONTROL PLAN
• Media Type: D
• Archive: No

•
RUN-OFF VOLUME
SEDIMENT VOLUME
USING THE UNIVERSAL SOIL LOSS EQUATION
SEDIMENT POND CAPACITY
The sediment pond is contructed at the low point of the
disturbed area on the west side of the mine site.
PRECIP DIRECT
ACRES CURVE AMOUNT RUN-OFF
13.800 82 2.0 0.65
TOTAL REQUIRED WATER VOLUME
RUN-OFF
VOLUME AF
0.75
0.75
A= R K L S C P
U
R = rainfall factor
K = soil erodibility factor
LS = combined length slope factor
C = cropping management factor
P = erosion control practice factor
A = sediment,tons/acre/year
38.00
0.70
0.33
1.00
1.00
8.78
0.15
THREE YEAR SEDIMENT VOLUME ACRE FEET
13.8 Acres 115 #/Cubic Feet
TOTAL REQUIRED SEDIMENT POND CAPACITY -- AF
0.89
On August 26, 1993, James E. Stover, P.E. No. 19230
certified that the sediment pond had been reconstructed
in accordance with the approved plan during the week of
August 27, 1993. The design of the sediment pond.is shown oa
drawing 11-3, revised 7-28-93. The certified pond capacity
is 0.90 acre feet. (0.75 Water + 0.15 Sediment).
•
11-2
Rev. 02-15-94