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SITE DITCHES AND CULVERTS <br />DITCH - J9-3 <br /> <br />Watershed data for watershed #1 Coal Waste <br /> Curve number 90 <br /> Area 0.29 Acres <br /> Hydraulic length 175 Feet <br /> Elevation change 100 Feet <br /> Concentration time 0.006 Hours <br /> Concentration time type SCS Upland Curves <br /> Unit hydrograph Rangelands <br /> <br /> <br />Total Area 0.3 Acres <br /> <br />Storm data <br /> Total precipitation 2.6 Inches <br /> Storm Type SCS T e 2 storm, 24 hour storm <br /> Peak discharge 0.46 <br /> <br /> <br />Flow from other ditches or culverts 11.61 Culvert J-4 <br /> <br />Peak discharge <br /> 11.61 cfs <br />• <br />Exh-6-180vi <br />04/07 <br />TR-45 <br />A PPRowo <br />7~3~a7 <br />