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KENNECOTT ENERGY CORPORATION <br />COLOWYO MINE <br />• 010A -East Taylor Watershed SEDCAD Model Input <br />Structure 4, Subwatershed 1 (S4-SWS1) <br />Disturbance: <br />Topsoil & Seeded: 0 acres <br />1-2 Year Reclamation: 0 acres <br />3+ Year Reclamation: 70.15 acres <br />Undisturbed: 66.98 acres <br />Total Subwatershed Area: 137.13 acres <br />Hydrology: <br />Time of Concentration: <br />Elevation Length Description <br />150 1100 Grassed Waterway <br />195 600 Grassed Waterway <br />225 3500 Channel w/Baseflow <br />Curve Number: 52 <br /> Sediment: <br />• Rainfall Factor: 19 <br /> <br /> Soil Erodibility Factor: 0.28 <br /> Length-Slope Factor. <br /> Elevation Length Slope <br /> 200 1000 20.0% <br /> 225 1000 22.5% <br /> 150 800 18.8% <br />Average <br />191.7 933.3 20.4% <br />Control Factor: 0.04 <br />Practice Factor 0.63 <br />r ~ <br />