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Juniper Woodland <br />Cover <br />Vegetative Cover % 45.3 <br />Litter % 23.3 <br />Ground Cover % 68.6 <br />Table 2-2d-Runoff curve numbers for arid and semiarid rangelands <br />Cover Type -Pinyon Juniper -pinyon, juniper or both; grass understory <br />Hydrologic Condition Fair <br />Soil Type -Loam C <br />Curve Number 73 <br />Coal Mine Waste <br />Table 2-2d-Runoff curve numbers for and and semiarid rangelands <br />Cover Type -Herbaceous-mixture of grass, weeds and brush <br />Hydrologic Condition Poor <br />Soil Type -Loam p <br />Curve Number gg« <br />«CN for Gob based on TR-22 Munger accepted value <br />RUN-OFF VOLUME - -Office Pond 10-Year <br />Precip Direct Run-off <br />Area Acres Curve # Amount Run-off Vol A-F <br />Disturbed 9.39 88 1.7 0.73 0.571 <br />Shadscale Shrubland 1.87 81 1.7 0.42 0.066 <br />Juniper Woodland 58.09 73 1.7 0.20 0.958 <br />Coal Mine Waste 1.58 89 1.7 0.78 0.103 <br />TOTAL 70.93 1.699 <br />SEDIMENT VOLUME -Office Pond <br />Use the universal soil loss equation. <br />A=RKLSCP <br />R =rainfall factor 30.00 <br />K =soil erodibility factor -sandy loam 0.37 <br />LS =combined length slope factor 0.31 <br />Use Gob Base Ditch - 400' & 2% <br />C =cropping management factor -Figure 7 1.00 <br />TR-16 14 <br />05/08 <br />