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<br />• <br />r~ <br />TR-59 <br />SENECA II-W <br />Channel PM-2 System <br />HYDROLOGIC INPUT PARAMETERS <br /> SEDCAD 4 <br /> Channel PM-2D <br /> Watershed ID -Structure 1 - SWS1 <br />Watershed Area: <br />40.5 <br />Curve Number: Postmine Conditions <br /> VEGETATION HYDROLOGIC CURVE AREA <br />WATERSHED TYPE COVER SOIL GROUP NUMBER (acres) <br />Reclaimed Good (>70%) C 71 40.50 <br />Total 40.50 <br /> CURVE NUMBER 71 <br /> SEDCAD 4 <br /> Channel PM-2E <br /> Watershed ID -Structure 1 - SWS2 <br />Watershed Area: <br />3.9 <br />Curve Number: Postmine Conditions <br /> VEGETATION HYDROLOGIC CURVE AREA <br />WATERSHED TYPE COVER SOIL GROUP NUMBER (acres) <br />Reclaimed Good (>70%) C 71 3.85 <br />Total 3.85 <br /> CURVE NUMBER 71 <br />Approved II-W Mine curve numbers are presented in Appendix 13-5B, Postmining Drainage and <br />Sediment Control, Table 1, Seneca II-W (South Expansion Area) Curve Numbers. Values were <br />adapted from Urban Hydrology for Small Watersheds, Technical Release No. 55, Soil Conservation <br />Service, 1986. <br />20-1.161 <br />Revised 08107 <br />