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SEDCAD 4 for Windows <br />l:nmminl+l 1000 _')nn7 D-1. I Cnhur�h <br />C. <br />Foidel Creek Mine <br />Refuse Disposal Area <br />20MM Yard Expansion <br />Initial Sequence Channel Design <br />• <br />Temporary Ditch RDA -4 <br />10- Year, 24 -Hour Storm Event <br />(Design includes Channels RDA -4a, RDA -5a and RDA -5, RDA -4a <br />is a temporary ditch; RDA -5 and RDA -5a are postmine channels <br />[Ditch designs for these two ditches are provided in another <br />demontration]) <br />jcw <br />Hydro - Environmental Solutions, Inc. <br />P.O. Box 772996 <br />57 10th Street, Suite B <br />Steamboat Springs, CO 80477 <br />• <br />Filename: RDA-4 Temp Ditch_Initial Construction 10yr24hr 092809.sc4 <br />Printed 09 -29 -2009 <br />