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KENNECOTT ENERGY CORPORATION <br />COLOWYO MINE <br />O01A -Streeter Watershed SEDCAD Model Input <br />Structure 6, Subwatershed 1 (S6-SWS1) <br />Disturbance: <br />Topsoil 8 Seeded: 0 acres <br />1-2 Year Reclamation: 0 acres <br />3+ Year Reclamation: 35.07 acres <br />Undisturbed: 35.E~9 acres <br />Total Subwatershed Area: 70.7'6 acres <br />Hydrology: <br />Time of Concentration: <br />Elevation Length Description <br />25 600 Upland <br />125 900 Grassed Chanrn~l <br />175 2000 Channel w/BaseFlow <br />Curve Number. 51 <br /> Sediment: <br />i <br />f <br />ll F <br />t <br />' <br />R <br />19 <br /> n <br />a <br />ac <br />or. <br />a <br /> Soil Erodibility Factor. 0.2'.8 <br /> Length-Slope Factor: <br /> Elevation Length Slope <br /> 100 400 25.0`% <br /> 75 600 12.5`% <br /> 200 700 28.6% <br /> 75 500 15.0`% <br />Average <br />113 550 20.3`% <br />Control Factor: 0.04 <br />Practice Factor: O.fi4 <br />_• <br />