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~ . ~ ~ • <br />llES[GN CRI'CER[A <br />LOADOUT SF.DIh7ENTATION POND <br />Drainage Basin Factors <br />Basin Designation DF 4 <br />Basin Area 0.295 Ac[•es <br />Sediment Volume: <br />by Universal Soil Loss Equation <br />Rainfall Factor R 2G <br />Soil Erodibility Factor K 0.28 TN/AC/YR/UNIT <br />Maximum Drainage Length of Basin L 90 FT. <br />Average Slope of Basin S 1.67 % <br />Topographic Factor LS 0.1767 <br />Erosion Control Factor VM 1.00 <br />Three Year Sediment Volume Vsediment 24 Cubic Feet <br />Runot[ Volume: <br />by Soil Conservation Service Me thod <br />Curve Number CN 87 <br />Rainfall (10 year - 24 hour) P 1.8 IN <br />Runoff Q 0.75 IN <br />Runoff Volume Vrunoff 803 Cubic Feet <br />Projected Wnshdown Volume: Vwaslidown 750 Cubic Feet <br />Total Volume Required: Vtotal 1577 Cubic Feet <br />Pond Volume (at spillway crest): Vpond 1650 Cubic Feet <br />Peak Discharge: <br />by Soil Conservation Service Me thod <br />Runoff Velocity V 1.27 Ft./Sec. <br />Time of Concentration T 1.2 MiN <br />Peak Discharge qc 1360 CSM/IN <br />Rainfall (25 year - 24 hour) Pp 2.2 iN <br />Runoft Q 1.07 IN <br />Design Disch[uge q 0.61 CPS <br />