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SEDB.WK1 <br /> • SEDIMENT POND B CAPACITY <br /> Sediment pond B is constructed in the north central portion <br /> of the permit area. Sediment ponds B contains the run-off <br /> from the central portion of the permit area. Based on the <br /> following calculations, sediment pond C is not required <br /> since sediment pond B can contain the run-off from the <br /> entire drainage area. Sediment pond B is constructed <br /> in Section 33 Creek. Sediment pond B is sized to handle the <br /> run-off from both drainage areas B & C. The emergency <br /> spillway for pond B is sized to handle the calculated peak <br /> peak flow from drainage areas B & C. <br /> RUN-OFF VOLUME - - POND B <br /> PRECIP DIRECT RUN-OFF <br /> ACRES CURVE AMOUNT RUN-OFF VOLUME AF <br /> 208 . 1 83 1. 6 0.44 7 . 59 <br /> 148 . 9 58 1. 6 0. 003 0 . 04 <br /> 357 . 0 Drainage Areas B & C <br /> TOTAL REQUIRED WATER VOLUME 7 . 63 <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 . 0% - 2000' 0.71 <br /> H = 260 L = 8750 S = 260/8750 = 3 . 0% . 00 <br /> C = cropping management factor 10 <br /> P = erosion control practice factor . <br /> A = sediment,tons/acre/year 2 .24 <br /> THREE YEAR SEDIMENT VOLUME ACRE FEET <br /> 357. 0 Acres 115 #/Cubic Feet 0.96 <br /> TOTAL REQUIRED SEDIMENT POND CAPACITY -- AF 8 .58 <br /> • 9-6 July 1992 <br />