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•) <br />ATTACHMENT 13-20 <br />As-Built Report <br />Sediment Structure <br />Pond 013 <br />Seneca Coal Company <br />Yoast Mine <br />Routt County, Colorado <br /> <br />September, 2004 <br />by <br />MWH <br />1475 Pine Grove Road, Suite 109 <br />P.O. Box 774018 <br />°'---`gat Springs, Colorado 80477 <br />Engineering Manager <br />• ' <br />Seneca.Coal Company <br />