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<br />Doc Date:12/1112001 <br />Prepared for: <br />ECA COAL COMPANY <br />P.O. Box D <br />ayden, Colorado 81639 <br />,TTACHMENT 13-12 <br /> <br />IECA YOAST MINE <br />DRAINAGE AND SEDIMENT CONTROL PLAN <br />June 1999 <br /> <br />Prepared by: <br />JU~~ 2 ~ 1999 <br />Montgomery Watson Mining Group <br />165 S. Union Boulevard, Suite 460 <br />Lakewood, Colorado 80228 <br />