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The following information and calculations summarizes the watershed basin found in <br /> the permit area: <br /> Hydraulic length: 6748 feet <br /> Elevation change: 1345 feet <br /> Slope: 20% <br /> Area of watershed: 225 acres <br /> Watershed type: Agricultural <br /> Storm distribution: SCS Type 1 storm; 24-hour storm <br /> Time step: .20 <br /> Time of concentration: 1.66 hours <br /> Type of TC calculation: SCS upland curve <br /> Curve number: 95 <br /> Total precipitation amount: 2.4 inches for a 100-year event <br /> 2.1 inches for a 25-tear event <br /> Peak discharge: 71.56 cfs for a 100-year event <br /> 60.38 cfs for a 25-year event <br /> Peak volume: 35 acre-feet for a 100-year event <br /> 29.59 acre-feet for a 25-year event <br /> 9 <br />