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• <br />Project Title <br />= Ditch Design - D-2B <br />Flow from West <br />WATERSHED HYDROGRAPH <br />Inflow into structure = #1 <br />Structure type: = Null <br />-- Watershed data for watershed #1 - Area 7 <br />Curve number = 74.0 <br />Area = 20.0 acres <br />Hydraulic length = 1700.0 feet <br />Elevation change = 1000.0 feet <br />Concentration time = 0.06 hours <br />Concentration time type = SCS Upland Curves <br />Unit hydrograph type = Forested <br />-- Watershed data for watershed #2 - ~ Area 6 <br />Curve number = 74.0 <br />Area = 12.5 acres <br />Hydraulic length = 1300.0 feet <br />Elevation change = 840.0 feet <br />Concentration time = 0.04 hours <br />Concentration time type = SCS Upland Curves <br />Unit hydrograph type = Forested <br />-- Total Area <br />= 32.5 acres <br />• -- Storm Data - 10 year event - <br />Total precipitation 1.8 inches <br />Storm type = SCS Type 2 storm, 24 hour storm <br />Peak discharge = 4.47 cfs <br />Discharge volume = 0.71 acre feet <br />• <br />4-B:15 <br />October 1994 <br />