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Subject PR TFCTION OF THE <br />HYDROLOGIC SYSTEM <br />Hubbard Canyon Ventilation Facilities <br />• No. 2 - Somerset Coal Mine <br />Sedimentation Pond No. 2 <br />SOIL LOSS CALCULATION TABLE Reference <br />Formula: A= R K C L S= Tons/year/Acre <br />Therefore Atpy = Ac R K CL S = Tons/year <br />BY-@AF <br />Checked <br />Acct <br />July 14, 19 81 <br />Sheet No. 2 of 2 Sheets <br />"Predicting Rainfall Erosion Losses " <br />Agriculture Handbook No. 537 <br />x 2000 Cubic-ft./y r, <br />Soil Wt. <br />Average soil weight = 95 lbs./cu. ft. 2000 = 21,0526 <br />95 <br />IRREGULAR SLOPE-LENGTH ADJUSTMENT (Agr. H.B. #537, pg. 15-16) <br />TYPE: Convex CV and Concave CC) Slopes <br />% = Percent Slope. L = Slope Length <br />LST - Tabulated Figure for Percent Slope to Length (Sum of L for irregular slopes) Table <br />8 Pg, 12. <br />Fac = Factor from Table 4, Pg. 15. (Note convex or concave slopes) <br />TABLE <br />SOIL LOSS CALCULATIONS <br />~ Irre ular Slo e-Len th d'ustment LS Soil Loss/Yr. <br />Area Acres R K C Type % L LST •,Fac. ~LS Adj i Tons Cu.Ft. ` Area <br /> I ~ <br />i <br />1 2.54 38 0.37 . 1 .0 ' ~ I 1.56 5~571~ 1173 <br />~ <br />~ 1 <br /> ~ _ <br />~ I <br /> _ <br /> <br /> <br /> I i <br /> ~ ~ i V <br /> <br />i I I ~ <br />Y <br /> <br />1 L <br /> __ 1 ~ <br /> j <br />~ ~ <br />~ <br />I <br />1 <br /> i <br /> I ~ 1 I i <br /> ' ~ I <br /> ._. <br />1 <br />I ' <br /> ~ ~ <br /> I <br /> <br />r'- <br /> <br />I1 <br />1 _~ <br />-- <br /> <br />_~ <br /> <br />' <br /> <br />. ~ <br /> <br /> <br />y__~ . ~ <br />_ <br />~ <br /> <br /> <br />_ <br />.• <br />