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9 Q=AXV= <br />Q REQUIRED - Peak Discharge <br />Riprap Sizing - Flume Outlet Channel <br />D50 = Size of Riprap <br />D50 = ((V X S^.17)/7.58))"2 <br />D50 = Diameter in feet <br />V = Velocity <br />S =Slope <br />55.26 CFS <br />54.88 CFS <br />D50 = 0.51 feet 6 inches Use 6" to 18" Rock <br />POND DEWATERING <br />USE A PUMP WITH A CAPACITY TO DEWATER IN 48-HOURS <br />. AS-BUILT WATER VOLUME <br />VOLUME <br />PUMP CAPACITY <br />PUMP SIZE <br />Dewatering Time <br />POND F <br />----------------- <br />----------------- <br />3.71 <br />1209530 <br />420 <br />4" <br />2880.00 Minutes <br />48.00 Hours <br />2.00 Days <br />Acre-Feet <br />Gallons <br />GPM <br />Pump capacity -- 409 gpm with 60' head which includes head loss in pipe. <br />• <br />TR-61 App-B8 04/09 <br />4PPRoV6D <br />6 (, a/0h