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• SEDE.WK1 <br />SEDIMENT POND E CAPACITY <br />Sediment pond E is to be constructed in the west central <br />portion of the permit area. Sediment pond E will contain <br />the run-off from the west side of Mining Area No. 2. <br />RUN-OFF VOLUME - - POND E <br />PRECIP DIRECT RUN-OFF <br />ACRES CURVE AMOUNT RUN-OFF VOLUME AF <br />62.200 80 1.6 0.34 1.74 <br />TOTAL RE@UIRED WATER VOLUME 1.74 <br />SEDIMENT VOLUME <br />USING THE UNIVERSAL SOIL LOSS EQUATION <br />A= R K~L S C P <br />• R = rainfall factor 30.00 <br />K = soil erodibility factor 0.21 <br />LS = combined length slope factor 3.5% - 2000' 1.06 <br />H = 110 L = 3150 S = 110/3150 = 3.5% <br />C = cropping management factor 1.00 <br />P = erosion control practice factor 0.50 <br />A = sediment tons/acre/year 3.34 <br />THREE YEAR SEDIMENT VOLUME ACRE FEET <br />62.2 Acres 115 #/Cubic Feet 0.25 <br />TOTAL REQUIRED SEDIMENT POND CAPACITY -- AF 1.99 <br /> <br />• <br />9-17 <br />