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KENNECOTT ENERGY CORPORATION <br />COLOWYO MINE <br />010A -East Taylor Watershed SEDCAD Model Input <br />Structure 4, Subwatershed 2 (S4-SWS2) <br />Disturbance: <br />Topsoil & Seeded: 2.73 acres <br />1-2 Year Reclamation: 22.87 acres <br />3+ Year Reclamation: 284.54 acres <br />Undisturbed: 0 acres <br />Total Subwatershed Area: 309.94 acres <br />Hydrology: <br />Time of Concentration: <br />Elevation Length Description <br />400 4150 Upland <br />300 3500 Diversion <br /> Curve Number: 57 <br /> Sediment: <br />Rainfall Factor: <br />19 <br /> <br /> Soil Erodibility Factor. 0.28 <br /> Length-Slope Factor: <br /> Elevation Length Slope <br /> 200 1900 10.5% <br /> 200 2350 8.5% <br /> 155 2100 7.4% <br /> 80 1300 6.2% <br /> 150 800 18.8% <br /> Average <br /> 157.0 1690.0 10.3% <br /> Control Factor: 0.02 <br /> Practice Factor: 0.38 <br />Ir~ <br />u <br />