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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 7V <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 flow. <br /> • <br /> 9-34 July 1992 <br />