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KENNECOTT ENERGY CORPORATION <br />COLOWYO MINE <br /> 009A -Section 16 Watershed SEDCAD Model Input <br /> Structure 4, Subwatershed 1 (S4-SWS1 ~ <br /> Disturbance: <br /> Topsoil & Seeded: 17.62 acres <br /> 1-2 Year Reclamation: 15.25 acres <br /> 3+ Year Reclamation: 53.38 acres <br /> Undisturbed: 11.08 acres <br /> Total Subwatershed Area: 97.33 acres <br /> Hydrology: <br /> Time of Concentration: <br /> Elevation Length Description <br /> 130 2650 Upland <br /> 200 1150 Grassed Waterway <br /> 60 2150 Diversion <br />Curve Number.' 61 <br /> Sediment: <br /> Rainfall Factor <br />' 19 <br /> . <br /> Soil Erodihility Factor.' 0.28 <br /> Length-Slope Factor.' <br /> Elevation Length Slope <br /> 100 2000 5.0% <br /> 200 1100 18.2% <br /> 145 1550 9.4% <br />Average <br />148 1550 10.8% <br />Control Factor: 0.17 <br />Practice Factor. 0.44 <br /> <br />