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Cover Type -Oak-aspen-mountain brush mixture <br />Hydrologic Condition Poor <br />Soil Type - Absarokee C <br />Curve Number 74 <br />RUN-OFF VOLUME - -Pond F <br /> Precip Direct Run-off <br />Area Acres Curve # Amount Run-off Vol A-F <br />Disturbed 25.62 87 1.8 0.75 1.61 <br />Coal Mine Waste 20.05 90 1.8 0.93 1.55 <br />Mixed Shrub 132.61 57 1.8 0.01 0.12 <br />Dry Mixed Shrub 201.20 57 1.8 0.01 0.18 <br />Juniper Woodland 4.12 61 1.8 0.04 0.01 <br />Prev. Disturbed 0.60 74 1.8 0.26 0.01 <br />TOTAL 384.20 3.48 <br />TOTAL REQUIRED WATER VOLUME - - A-F 3.48 <br />SEDIMENT VOLUME -Pond F <br />Use the universal soil loss equation. <br />A=RKLSCP <br />R =rainfall factor 30.00 <br />K =soil erodibility factor 0.37 <br />LS =combined length slope factor 900' - 2% 0.39 <br />Use Ditch F7 Length & Slope <br />C =cropping management factor 1.00 <br />P =erosion control practice factor 1.00 <br />A =sediment, tons/acre/year 4.33 <br />Three Year Sediment Volume -Acre-Feet 0.26 <br />50.39 ACRES - 115 #/CF <br />Mixed Shrub and Dry Mixed Shrub not included. <br />App. B - 4 <br />Total Required Sediment Pond Capacity -Acre-Feet 3.74 <br />~fiR-4 ~ <br />f~ P Pf'o vED <br />3/ia/o 7 <br />