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~' <br />SEDIMENT VOLUME -Pond B <br />Use the universal soil loss equation. <br />The Topographic Factor LS is difficult to evaluate for a steep mountainous drainage <br />area. According to the LS factor table, when the length of slope exceeds 400 feet and <br />or percent slope exceeds 24 percent, soil loss estimates are speculative as these <br />values are beyond the range of research data. Therefore, an LS factor using 400 feet <br />and 24 percent will be used for this calculation. <br />SEDIMENT VOLUME -Pond B <br />Calculate Weighted Average C-Factor <br />Area Acres % Canopy % Cover C-Factor Extended <br />Disturbed` 45.20 0.0 0.0 0.1800 8.136 <br />Mixed Shrub 55.00 56.9 92.6 0.0046 0.253 <br />Dry Mixed Shrub 17.60 20.0 40.0 0.1000 1.760 <br />Juniper Woodland 30.50 28.2 85.2 0.0100 0.305 <br />Wetland 1.70 0.0 50.0 0.0710 0.121 <br />Sage 0.20 0.0 78.0 0.0160 0.003 <br />Meadow 0.20 0.0 88.4 0.0074 0,001 <br /> <br />TOTAL 150.40 <br />* One ton mulch per acre. <br />SEDIMENT VOLUME -Pond B <br />A=RKLSCP <br />R =rainfall factor <br />K =soil erodibility factor <br />LS =combined length slope factor 400' - 24% <br />C =cropping management factor <br />P =erosion control practice factor <br />A =sediment, tons/acre/year <br />ONE YEAR SEDIMENT VOLUME -ACRE FEET <br />150.40 ACRES - 115 #/CF <br />TOTAL REQUIRED SEDIMENT POND CAPACITY--AF <br />PR-07 EXH-8 -5 <br />Wt. Ave. 0.070 <br />30.00 <br />0.37 <br />11.20 <br />0.0703 <br />0.75 <br />6.56 <br />0.394 <br />3.462 <br />2/03 <br />