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KENNECOTT ENERGY CORPORATION <br />COLOWYO MINE <br />• 007A -Prospect Watershed SEDCAD Model Input <br /> Structure 3, Subwatershed 1 (S3-SWS1) <br /> Disturbance: <br /> Topsoil & Seeded: 51.28 acres <br /> 1-2 Year Reclamation: 121.72 acres <br /> 3+ Year Reclamation: 98.25 acres <br /> Undisturbed: 1.08 acres <br /> Total Subwatershed Area: 272.33 acres <br /> Hydrology: <br /> Time of Concentration: <br /> Elevation Length Description <br /> 80 700 Upland <br /> 125 1600 Upland <br /> 130 800 Grassed Waterway <br /> 530 4100 Channelw/Baseflow <br /> Curve Number: 84 <br /> Sediment: <br />• Rainfall Factor: 19 <br /> <br /> Soil Erodibility Factor: 0.28 <br /> Length-Slope Factor: <br /> Elevation Length Slope <br /> 325 2500 13.0% <br /> 420 2100 20.0% <br /> 300 1975 15.2% <br />Average <br />348.3 2191.7 16.1% <br />Control Factor: 0.19 <br />Practice Factor: 0.38 <br />• <br />