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Project Title = CMP #13 AREA 3 HAUL ROAD <br />WATERSHED HYDROGRAPH <br />• Inflow into structure # 1 <br />Structure type: Null <br />-- Watershed data for watershed # 1 <br />Curve number = 83.0 <br />Area = 53.4 acres <br />Hydraulic length = 2200.00 Feet <br />Elevation change = 56.0 feet. <br />Concentration time = 0.38 hours <br />Concentration time type = SCS Upland Curves <br />Unit hydrograph type = Agriculture <br />-- Watershed data for watershed # 2 <br />Curve number = 58.0 <br />Area = 34.3 acres <br />Hydraulic length = 2400.00 Feet <br />Elevation change = 106.0 feet. <br />Concentration time = 0.45 hours <br />Concentration time type = SCS Upland Curves <br />Unit hydrograph type = Agriculture <br />-- Total Area = 87.7 acres <br />• Storm data <br />Total precipitation - 1.6 inches <br />Storm type = SCS Type 2 storm, 24 hour storm <br />Peak Discharge = 12.74 cfs <br />Discharge volume = 1.96 acre ft <br />Use 24" Diameter CMP - With a headwater depth of 2.2 feet - <br />just 0.2 feet above the top of the pipe the 24" CMP will <br />handle the design flocu. <br />• <br />9-34 July 1992 <br />