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KENNECOTT ENERGY CORPORATION <br />COLOWYO MINE <br />010A -East Taylor Watershed SEDCAD Model Input <br />Structure 3, Subwatershed 1 (S3-SWS1) <br />Disturbance: <br />Topsoil & Seeded: 50.51 acres <br />1-2 Year Reclamation: 51.93 acres <br />3+ Year Reclamation: 40.73 acres <br />Undisturbed: 27.27 acres <br />Total Subwatershed Area: 170.44 acres <br />Hydrology: <br />Time of Concentration: <br />Elevation Length Description <br />130 1200 Upland <br />300 1050 Grassed Waterway <br />250 3750 Channel w/Baseflow <br />Curve Number: 65 <br />• Sediment: <br />Rainfall Factor: <br />19 <br /> <br /> Soil Erodibility Factor: 0.28 <br /> Length-Slope Factor: <br /> Elevation Length Slope <br /> 300 1150 26.1% <br /> 100 900 11.1% <br /> 200 700 28.6% <br /> 300 1150 26.1 <br />Average <br />225.0 975.0 23.0% <br />Control Factor: 0.27 <br />Practice Factor: 0.46 <br /> <br />