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KERR COAL MINE <br />CALCULATED SEDIMENTOLOGY DATA <br />RECLAIMED CONDITION 720 PIT <br />SOIL ERODIBILITY FACTOR: <br /> <br />Soil Type Erodib~lity <br /> Factor, K <br />Clay Loam 0.28 <br />SLOPE FACTOR: <br />Length <br /> <br />fl) Slope <br /> <br />(%) m Slope <br />Angle <br />d LS <br />Factor <br />85 250% 0.6 14.0 3.93 <br />85 25.0 % 0.6 14.0 3.93 <br />85 25.0 % 0 6 14.0 3.93 <br />BS 250% O6 14.0 3.93 <br />85 25.0% OB 140 393 <br />400 1.0% 03 O6 0.23 <br />300 80% 0.5 4.8 181 <br />760 6.0% 0.5 31 219 <br />850 5.0% 0 5 2.9 1.70 <br />210 2.0% 0.3 1.1 0.34 <br />730 6.0°0 0 5 3.4 2.15 <br />620 9 0% 0 5 5.1 2.94 <br />900 4 0% 0.4 2 3 1 26 <br />500 2.0% 0.3 11 0.44 <br />230 2.0% 0.3 1.1 035 <br />760 2 0 % 0.3 1.1 D 36 <br />Average LS = 2.09 <br />The LS Factor was ralculafed by: <br />LS = (Slope LengIM2 6)"m'(1O.B'sin(s/ope angle) + 0.03) for Slopes < 9% <br />LS = (Slope Leng1M2.6)"m'(16 B'mn(slope angle) - 0.5) for Slopes > 9% <br />Where' <br />Slope <3% m=0.3 <br />Slope=q°/, m=0.4 <br />5%>Slope<f0', m=0.5 <br />Slope>fOY. m=O6 <br />COVER AND PRACTICE FACTORS: <br />Cover Cover Canopy Cgver Prance <br />Type Factor, C Factor, P <br /> % %) <br />Reclaimed 64% 0 % 0.07 0.80 <br />ANNUAL SEDIMENT YIELD <br />The /ollowinp spreadsheet calculates the pratlicled sediment yield for the project ama. The gross sediment yield <br />is tletemninetl according to the Revisetl Universal Sal Loss Equation. <br />PARAMETER DESCRIPTON VALUE <br />Annual Rainfall Factor 16.50 <br />Soil Erotlibiliry Factor 0.2B <br />Lerglh Slope Factor 2 09 <br />Cover Factor 0 07 <br />Pra~iice Factor 0.80 <br />Grass Annual Sedimern Yield 054 tons/acre/year <br />