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., <br /> <br />,, Prepared for: <br />SENECA COAL COMPANY <br />P.O. Box D <br />Hayden, Colorado 81639 <br />ATTACHMENT 13-12 <br />.~,~ <br />~. <br />SENECA YOAST MINE <br />DRAINAGE AND SEDIMENT CONTROL PLAN <br />June 1999 <br />Prepared fry: <br />~~~ <br />Montgomery Watson Mining Group <br />165 S. Union Boulevard, Suite 460 <br />Lakewood, Colorado 80228 <br />JUN 2 ~ 1999 <br />4 ~ <br />