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--~ <br />TABLE 4 <br />SEDIiiENT P07:DS <br />SEDIi•iEkT ACID FLOJD VJLU(•iE5 <br /> 10-year, 24-hour Runoff Sediment* Pond <br /> Drainage Area Runoffl Yolume Volume Size <br />Pit (acres) (inches) ac.ft. ac.ft. ac.ft. <br />4 139.9 .70 8.16 .4G 8.52 <br />5 8 6 47.7 .70 2.73 .l1 2.95 <br />*~~OTE: for disturbed areas, the SCS has recommended against using the USLE. <br /> Sediment volume tiaas calculated b ased on average annual runoff of 5 <br /> inches/year, an assumed sediment load of 10,000 mg/1 year round and <br /> the drainage area of each pit. Sediment volume is computed in acre- <br /> feet/year, assuming a denisty of 80 pcf. <br />1. Determined using a CY of 36 for the mine pits and a 10-yea r 24-hour <br /> rainfall of 1.80 inches. <br />2-87 <br />_11I-21 <br />