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KERR COAL MINE <br />CALCULATED SEDIMENTOLOGY DATA <br />PREMINING CONDRION 720 PIT <br />SOIL ERODIBILRY FACTOR: <br /> <br />Soil Type ErodEilily <br /> Favor. N <br />Clay Loam 0.78 <br />SLOPE FACTOR: <br />Lengln <br /> <br />h Slope <br /> <br />% m Slope <br />Angle <br />de LS <br />Factor <br />21D 01% a o.D 004 <br />150 11.0% 0.6 6.3 2.07 <br />640 5.0% 0.5 2 9 1.69 <br />360 BO% 05 46 1.98 <br />420 180% O6 10.2 7.10 <br />350 6.0% 0.5 3.4 169 <br />460 10.0% 0.5 5.] 295 <br />140 20.0% 0.6 t1.3 4.14 <br />3]0 80% 0.5 46 201 <br />700 10 0% O S 5 ] 2.38 <br />330 9.0% 0.5 5.1 2.14 <br />300 I0.0% 0.6 f f.3 6.55 <br />420 4.OY. 0.4 2.3 097 <br />260 190% O6 tOB 56T <br />510 10.0X 0.5 5.7 3.11 <br />560 5.0% 0.5 2.9 1.56 <br />310 15.0% 0.6 6.5 d.]6 <br />3]0 t2.0% 0.6 6.B 3.99 <br />530 60X 0.5 4.6 2.41 <br />310 B.0% 0.5 4 6 1 B4 <br />910 50% OS 29 2.02 <br />530 13.0% 0.6 ].4 5.43 <br />330 12.0% 0.6 fi.8 3.72 <br />150 100% 05 5.] 1.68 <br />260 1T.OX O6 9fi 4.90 <br />Average LS = 30] <br />the LS Factor was wlculatatl oy: <br />LS = (Sbpe LenAfML6J"m'(10 8'sin(sbpe anAleJ ~ 0 03) br Slopes < 9% <br />LS=(Sbpe LengIM16J"m•(I6. B's~n(slopp anAlel 0.5) br Sopes>9% <br />Where. <br />Slope <3k m=OJ <br />Slope=4% m=0d <br />5%>Sbpe <1py, m=05 <br />Sbpe>f0% m=0.6 <br />COVER AND PRACTICE F4CTOR5: <br />Cover <br />TYOe Cover <br /> <br />%. Canopy <br /> <br />% Area <br /> <br />acres Cover <br />Fada. C C'Area Practice <br />Factor. P P•Area <br />Alkali Sa epmsh 44% 25% 171.7 O.OB 13]4 100 1T1.]0 <br />Sa ebrush-Grass 56% 25X 4.8 0.05 024 100 d80 <br />TOTAL: 1]65 13.98 176.50 <br />W e~gMed C =Total C'Area/ Total Area = 0.019 <br />Weightetl P = Toul P'Area/ Total Area = 1.000 <br />ANNUAL SEDIMENT YIELD <br />The bllowing spreatlsheel ['alculates fhe predicted stdimenf yieb for the project area. The gross sediment yield <br />rs delerminetl acmrtlng to the Revrsetl Universal 5oi Loss Epua(ron <br />PARAMETER DESCRIPTION VALUE <br />Annual Rainfall Factor 16.50 <br />Son Erotlib~uty Factor 0.28 <br />Length Sloce Fodor 307 <br />Cover Fodor O.OB <br />Pacbce Fodor t 00 <br />Gross Annual Setlintenl Yieltl L12 lonslacre/year <br />