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SEDCAD 4 for Windows <br />Peabody Sage Creek Mine <br />PECOCO Pond <br />25 -year, 24 -hour Storm Event <br />0 <br />Operational Conditions - Re- Design <br />Combination Spillway Check <br />(The sediment storage value is a user set value equal to the <br />sediment storage from the 10 -year, 24 -17our storm event,) <br />Jcw <br />Hydro - Environmental Solutions, Inc. <br />P.O. Box 772996 <br />57 10th Street, Suite B <br />Steamboat Springs, CO 80477 <br />I IEC� <br />D \- w. ° '� °•• STS' <br />?F)n46 <br />• ._ j <br />0�NIAI <br />Filename: PECOCO Pond_Operational_25Yr24Hr Re- Design_1109.sc4 <br />2.05.3- E2.D -2.1 <br />Printed 01 -08 -2010 <br />12,'09 <br />