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KENNECOTT ENERGY CORPORATION <br />COLOWYO MINE <br />001A -Streeter Watershed SEDCAD Modei Input <br />Structure 5, Subwatershed 2 (S5SWS2) <br />Disturbance: <br />Topsoil & Seeded: 0 acres <br />1-2 Year Reclamation: 0 acres <br />3+ Year Reclamation: 75.:12 acres <br />Undisturbed: 0 acres <br />Total Subwatershed Area: 75.:12 acres <br />Hydrology: <br />Time of Concentration: <br />Elevation Length Description <br />125 750 Upland <br />220 3000 Grassed Waterway <br />Curve Number. '.16 <br />• Sediment: <br />Rainfall Factor: 19 <br />Soil Erodibility Factor: 0.2;8 <br />Length-Slope Factor: <br />Elevation Length Slope <br />100 500 20.0`% <br />20 500 4.0`% <br />20 600 3.3`% <br />Average <br />47 533 9.1'% <br />Control Factor; 0.01 <br />Practice Factor: 0.38 <br />• <br />