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• Project Title <br />= Ditch Design - D-7 <br />Refuse Pile Upper Diversion Ditch <br />WATERSHED HYDROGRAPH <br />Inflow into structure = #1 <br />Structure type: = Null <br />-- Watershed data for watershed #1 - Area 3A <br />Curve number = 66.0 <br />Area = 47.0 acres <br />Hydraulic length = 4600.0 feet <br />Elevation change = 1480.0 feet <br />Concentration time = 0.22 hours <br />Concentration time type = SCS Upland Curves <br />Unit hydrograph type = Forested <br />-- Watershed data for watershed #2 - Area 3B <br />Curve number = 66.0 <br />Area = 53.0 acres <br />Hydraulic length = 3700.0 feet <br />Elevation change = 1320.0 feet <br />Concentration time = 0.17 hours <br />Concentration time type = SCS Upland Curves <br />Unit hydrograph type = Forested <br />-- Watershed data for watershed #2 - Area 4 <br />• Curve number <br />Area 66.0 <br />10.0 acres <br />Hydraulic length = 1300.0 feet <br />Elevation change = 480.0 feet <br />Concentration time = 0.06 hours <br />Concentration time type = SCS Upland Curves <br />Unit hydrograph type = Forested <br />-- Total Area = 110.0 acres <br />-- Storm Data - 100 year event <br />Total precipitation = 2.4 inches <br />Storm type = SCS Type 2 storm, 24 hour storm <br />Peak discharge = 9.24 cfs <br />Discharge volume = 2.64 acre feet <br /> <br />4-B: 12 <br />October 1994 <br />