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SITE DITCHES AND CULVERTS <br />DITCH - J3 <br /> <br />Watershed data for watershed #1 Disturbed <br /> Curve number 87 <br /> Area 4.9 Acres <br /> Hydraulic length 1826 Feet <br /> Elevation change 10 Feet <br /> Concentration time 0.70 Hours <br /> Concentration time type SCS Upland Curves <br /> Unit hydrograph Disturbed <br /> <br />Watershed data for watershed #2 Coal Waste <br /> Curve number 90 <br /> Area 3.91 Acres <br /> Hydraulic length 1826 Feet <br /> Elevation change 10 Feet <br /> Concentration time 0.70 Hours <br /> Concentration time type SCS Upland Curves <br /> Unit hydrograph Disturbed <br /> <br /> <br /> <br />Total Area 8.8 Acres <br /> <br />Storm data <br /> Total precipitation 2.6 Inches <br /> Storm Type SCS Type 2 storm, 24 hour storm <br /> Peak discharge 9.56 cfs <br /> <br /> <br />Flow from other ditches or culverts 10.21 Ditch JS <br /> 11.61 Ditch J9 <br /> <br /> <br /> <br />Peak discharge 28.35 cfs <br />TR-45 Exh-8-179 04/07 <br />A?PRot+6/~ <br />7~~~a~ <br />