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LS = ( L )m' + (17,2 sin - 0.551 for S > 68 <br />• 72.6 <br />LS - ( 200 )0.6 + (17.2 sin 15.0• - 0.55) <br />72.6 <br />LS l.Sq (4.45 - 0.55) <br />LS 7.2 <br />The C and P Factors. The C factor, the cover and management factor, is the ratio of soil <br />loss from an area with specified cover and management to that from an identical area in <br />tilled continuous fallow. <br />The P facto t, the suppo tt pcactice factor, Ls the ratio of soil loss wLth a support <br />practice like contouring, st tip cropping, or to rtacing to chat with st:alght-cow farming <br />up and down the slope. <br /> The C factor was determined based on the vegetation description In Tab 10 and with the aid <br /> of the USDA-ARS revised USLE software program for each cover type within the overall <br /> drainage area. The P factor Ss based on current or future practice. Table 13-3A-2 shows <br />• the weighted average results for the C and P factors for the various su bwatersheds. <br />Storage Capacity <br />The storage capacity of Sediment Pond 010 was also analyzed using the SEDCAD' computer <br />program. Results of the SEDCAD~ model show the storm runoff volume from the 10-year, 24- <br />hour precipitation event to be 18.3 ac-ft. The ponding area is designed to score 9.56 ac- <br />ft of sediment. There will be no discharge through the emergency spillway during the 10- <br />year, 24-hour storm event. In addition, [here will be adequate freeboard from the <br />emergency spillway to the top of embankment durl ng the 100-year, 24-hour storm event. <br />Table 13-3A-4 is a summary of the as-built storage capacity. <br />• <br />13-3A-1 Revised 08/30/96 <br />