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• RUN-OFF VOLUME - - POND F <br /> PRECIP DIRECT RUN-OFF <br />ACRES CURVE AMOUNT RUN-OFF VOLUME AF <br />94.2 83 1.6 0.44 3.43 <br />136.7 58 1.6 0.00 0.04 <br />TOTAL REQUIRED WATER VOLUME 3.47 <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' 1.05 <br />C = cropping management factor 1.00 <br />P = erosion control practice factor 0.50 <br />A = sediment tons/acre/year 3.31 <br />THREE YEAR SEDIMENT VOLUME ACRE FEET <br />230.9 Acres 115 #/Cubic Feet 0.91 <br />• TOTAL REQUIRED SEDIMENT POND F CAPACITY -- AF 4.38 <br />PEAK FLOW CALCULATIONS <br />The following peak flow calculations were compiled with <br />the computer program STORM version 6.21. Details of the <br />run-off calculations are shown on the following pages. <br /> 10-YR 25-YR <br /> 24 HR 24 HR <br /> Event Event <br />Area CD-3E 3.84 14.80 <br />Area CD-2E 2.94 4.88 <br />Area CD-lE 10.21 16.97 <br />Area CD-1W 4.93 8.20 <br />Area Pond F 17.51 <br />Peak flow for Pond F spillway 62.36 <br />Four collection ditches will be constructed to collect <br />and channel the run-off to sediment pond F. Ditch CD-3E <br />feeds CD-2E which feeds CD-lE. The peak flow in the <br />ditches will be as follows: <br />Ditch CD-3E 3.84 <br />. <br />Ditch CD-2E 6.78 <br />Ditch CD-lE 16.99 <br />Ditch CD-1W 4.93 <br /> 9-28 <br />July 1992 <br />