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SITE DITCHES AND CULVERTS <br /> <br />• <br />• <br />DITCH - 19-1 & J9-2 <br /> <br />Watershed data for watershed #1 Disturbed <br /> Curve number 87 <br /> Area 1.1 Acres <br /> Hydraulic length 2 Feet <br /> Elevation change 847 Feet <br /> Concentration time 0.49 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 1.32 Acres <br /> Hydraulic length 1360 Feet <br /> Elevation change 46 Feet <br /> Concentration time 0.211 Hours <br /> Concentration time type SCS Upland Curves <br /> Unit hydrograph Rangelands <br /> <br />Watershed data for watershed #3 Disturbed <br /> Curve number 87 <br /> Area 0.25 Acres <br /> Hydraulic length 847 Feet <br /> Elevation change 46 Feet <br /> Concentration time 0.1 Hours <br /> Concentration time type SCS Upland Curves <br /> Unit hydrograph Agriculture <br /> <br />Watershed data for watershed #3 Pasture <br /> Curve number 74 <br /> Area 1.94 Acres <br /> Hydraulic length 514 Feet <br /> Elevation change 44 Feet <br /> Concentration time 0.061 Hours <br /> Concentration time type SCS Upland Curves <br /> Unit hydrograph Agriculture <br /> <br />Total Area 4.7 Acres <br /> <br />Storm data <br /> Total precipitation 2.6 Inches <br /> Storm Type SCS Type 2 storm, 24 hour storm <br /> Peak discharge 3.30 cfs Ditch J9-1 <br /> <br /> <br />Flow from other ditches or culverts 7.06 Ditch J11 <br /> <br />Peak discharge <br /> 11.61 cfs Ditch J-9-2 <br />TR-49 Exh-8-180v 05/09 <br />ppRov6D <br />G/ylo9