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SITE DITCHES AND CULVERTS <br />DITCH - J11 <br /> <br />Watershed data for watershed #1 Coal Waste <br /> Curve number 90 <br /> Area 4.5 Acres <br /> Hydraulic length 890 Feet <br /> Elevation change 28 Feet <br /> Concentration time 0.139 Hours <br /> Concentration time type SCS Upland Curves <br /> Unit hydrograph Rangelands <br /> <br />Total Area 4.5 Acres <br /> <br />Storm data <br /> Total precipitation 2.6 Inches <br /> Storm Type SCS Type 2 storm, 24 hour storm <br /> Peak discharge 7.06 cfs <br /> <br /> <br />Flow from other ditches or culverts 0.00 <br /> <br />Peak dischar a 7.06 cfs <br />i• <br />TR-45 Exh-8-180viii 04/07 <br />APPRovED <br />7/3~e7 <br />