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<br />STATE OF C~ III ~~~~~~~~~~~~~~~~ <br />999 <br />MINED LAND RECLAMA710N DIVISION of ~o~o <br />De artment of Natural Resources ~~` q9 <br />P :..: <br />i~--~ <br />1313 Sherman St., Room 215 , . ~ hr-{ ~ . <br />Denver, CO 60203 . ` ~L~,,;.lyl~. <br />303 666-3567 'iB7e' <br />FAX 303 632-6106 <br />Roy Romer, <br />Governor <br />Fretl R. Banta. <br />Division Director <br />DATE: September 5, 1991 <br />T0: Randy Price <br />FROM: Harry Ranney <br />RE: Blue Ribbon Sediment Pond Calculations <br />This memo is to confirm that the sediment pond calculations for the Dlue <br />Ribbon Pond 5 are adequate. Calculations submitted by Jim Stover indicated <br />that for the 10 year, 24 hour event the total runoff would be .455 acre feet <br />and with .2 acre feet of sediment the total volume for the pond would need to <br />be .655 acre feet. <br />My calculations yielded .53 acre feet of water and .2 acre feet of sediment, <br />thereby requiring a pond size of .73 acre feet. <br />Since the pond's current total capacity now stands at .745 acre feet, the pond <br />is adequately sized for the iD year, 24 hour event. <br /> <br />7998E/scg <br />