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KERR COAL MINE <br />CALCULATED SEDIMENTOLOGY DATA <br />PREMINING CONDITION PIT 1 <br />SOIL ERODIBILITY FACTOR: <br /> <br />Soil Type En)tlibility <br /> Factor, K <br />Clay loam 0.28 <br />SLOPE FACTOR: <br />Length <br /> <br />8 Slope <br /> <br />% m Slope <br />Angle <br />(de ) LS <br />Factor <br />350 25.0% 0.6 14.0 9.19 <br />200 45.0% 0.6 25.2 11.74 <br />300 180% 0.6 10.2 5.80 <br />350 270% O.fi 15.1 9.97 <br />600 200% 0.6 11.3 7.76 <br />400 180% O6 10.2 6.69 <br />250 24.0% 0.6 13 5 7.10 <br />350 100% 0.5 5.7 2.57 <br />350 7.0% 0 5 4 0 1.72 <br />Avenge LS = 6.98 <br />The LS Factor was ra/culaletl oy' <br />L5=(Slope LenptM2.8)"m'(f0.8'sin(slope angle)+0.03) for Slopes<9% <br />LS = (Slope Lengf/N2 6)"m'(16 8'sin(s/ope angle) - 0.5J br Slopes > g% <br />Where: <br />Slope i3% m=0.3 <br />Slope=d% m=0.4 <br />5%>Slope<f0% m=05 <br />Slope>f0% m=0.6 <br />COVER AND PRACTICE FACTORS: <br />Cover <br />Type Cover Canopy Area <br /> <br />acres Cover <br />Facwr, C C'Area Practice <br />Facor, P P•Area <br />Alkali Sa ebrush 44% 25% 48.4 008 387 100 be.bg <br />Sa ebrush-Grass 56 % 25% 11.6 005 058 1.00 11.60 <br />TOTAL: 60 4 d5 60.00 <br />Weighed C =Total C'Area/ Total Area = 0.074 <br />W eigMetl P =Total P'Area/ Total Area = 1.000 <br />ANNUAL SEDIMENT YIELD <br />The Iollowinp spreadsheet calculates the predicted sediment yield for the protect area. The gross sedrmenl yreltl <br />is determinetl accoNinp to the Revised Uni/ersal Sal Loss Equalron. <br />PARAMETER DESCRIPTON VALUE <br />Annual Rainfall Factor 16.50 <br />Soil Emdibil~ty Factor 028 <br />Length Slope FdCTOr 6.98 <br />Cover Facor 0.07 <br />Practice Factor 1 00 <br />Grass Annual Setlimen[Yield 2.39 tonslacrPJyear <br />