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• Juniper Woodland Community <br />Vegetative Cover <br />Litter <br />Ground Cover <br />50.1 84.8 <br />Table 2-2d-Runoff curve numbers for arid and semiarid rangelands <br />Cover Type -Pinyon-juniper, juniper or both, grass understory <br />Hydrologic Condition Good <br />Soil Type - Absarokee C <br />Curve Number 61 <br />RUN-OFF VOLUME - -Pond F <br /> Precip Direct Run-off <br />Area Acres Curve # Amount Run-off Vol A-F <br />Disturbed 17.20 87 1.8 0.75 1.08 <br />Burned Area 4.57 81 1.8 0.48 0.18 <br />Coal Mine Waste 17.81 93 1.8 1.13 1.68 <br />Mixed Shrub 134.10 41 1.8 0.00 0.00 <br />• <br />Dry Mixed Shrub 203.30 57 1.8 0.01 0.18 <br />Prev. Disturbed 5.10 74 1.8 0.26 0.11 <br />Juniper Woodland 6.37 61 1.8 0.04 0.02 <br />TOTAL <br />388.45 <br />TOTAL REQUIRED WATER VOLUME - - A-F <br />SEDIMENT VOLUME -Pond F <br />Use the universal soil loss equation. <br />A=RKLSCP <br />R =rainfall factor <br />K =soil erodibility factor <br />LS =combined length slope factor 800' - 2% <br />Use Ditch F7 Length & Slope <br />C =cropping management factor <br />P =erosion control practice factor <br />A =sediment, tons/acre/year <br />I• <br />Three Year Sediment Volume -Acre-Feet <br />51.05 ACRES - 115 #/CF <br />Mixed Shrub and Dry Mixed Shrub not included. <br />Total Required Sediment Pond Capacity -Acre-Feet <br />2003 <br />Veg Rep. Table V-2 <br />Baseline Reference <br />17.2 26.3 <br />32.9 58.5 <br />3.26 <br />3.26 <br />30.00 <br />0.37 <br />0.38 <br />1.00 <br />1.00 <br />4.22 <br />0.26 <br />3.52 <br />APP-B - 4 - 11 /03 <br />