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SEDCAD 4 for Windows <br />r..~,,,:,.~.~ ~ooa o~,.,ei~ i s..~.,.,~n <br />1 <br />r1 <br />LJ <br />Twentymile Coal <br />~~•.~ <br />Scoria Pile Area <br />10-year, 24-hour Event <br /> <br />Sediment Trap Revision, Apri/ 2005 <br />~~ <br />Hydro-Environmental Solutions, Inc. <br />P.O. Box 772996 <br />57 10th Street, Suite B <br />Steamboat Springs, CO 80477 <br />I• <br />Filename: Scoria Pile w_ RevisedTrap.sc4 <br />Printed OS-04-2005 <br />