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x = Stream Elevation Difference <br /> The Slope Length <br /> X= 1150 ft. <br /> m = 0.4 <br /> x = sin 2.66 = 0.0464 <br /> LS = (1150)0.4 [(430(0.0464)2 + 30(0.0464) + 0.43)] <br /> 72.6 6.613 <br /> LS = 1.25 <br /> Approximate LS Curve = 1.5 <br /> Therefore, use 1.5 <br /> Control Practice Factor (CP). The control practice factor (CP) was estimated to be 1.00 <br /> for fresh cultivated land with no conservation treatment (Barfield et al., 1981). <br /> Sediment Storage Capacity. The SEDIMOT II computer program was utilized to calculate the <br /> sedimentology of the watershed using the Modified Universal Soil Loss Equation (MUSLE). <br /> Using a density of $7' lbs/cubic foot, 2667.4 tons or 1.41 ac-ft. of sediment will be <br /> deposited in this pond as the result of a 10-year, 24-hour storm. A total of 6.68 ac-ft. <br /> or 4.7 MUSLE 10-year, 24-hour storm event equivalent storage is provided for sediment <br /> storage. Peabody will restore adequate sediment storage to the pond when the available <br /> sediment storage becomes 1.41 ac-ft. or less. <br /> Pond Storage Capacity <br /> The storage capacity of Sedimentation Pond 007 was also analyzed using the SEDIMOT II <br /> computer program. Table 6 is a summary of the designed storage capacity. <br /> TABLE 6 <br /> Design Storage Capacity Summary <br /> Sedimentation Pond 007 <br /> Elevation Stage Capacity <br /> (msl) (Ft.) (Ac-ft) Description <br /> 5640.0 0.0 0.0 Bottom of Pond <br /> 5643.9 3.9 6.68 100% Sediment Storage <br /> 5647.0 7.0 12.12 Elevation of Principal Spillway <br /> and Top of Conservation Storage <br /> 9 <br />