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APPENDIX A <br />SYLVESTER GULCH FAN SITE <br />RUNOFF AND SEDIMENT CONTROL PLAN <br />.~ <br />UPLAND OR CLEANWATER DIVERSION DITCH <br />UNDISTURBED DRAINAGE AREA <br />Drainage Area <br />Rainfall (10 yr-24 hr) <br />Length of Drainage <br />Change in Elevation <br />Curve Number <br />Runoff (10 yr-24 hr) <br />Peak DTSCharge <br />6.43 acres <br />1.8 inches <br />1650 feet <br />820 feet <br />67 <br />0.12 inches <br />11.0 cfs/inch of runoff <br />Peak Discharge (11.0 cfs/inch) (0.12 inches) <br />1.32 cfs @ peak <br />*Channel Design - Cleanwater Diversion Ditch <br />Design Criteria <br />Channel Length <br />Change in Elevation <br />425 feet <br />20 feet <br />• *Reference for channel design "Aplied Hydrology and Sedimentology of <br />Surface Mined Lands," Barfield, Warner and Haan, 1981. <br />