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FINAL REPORT <br />NORTH FORK VALLEY SEISMIC NETWORK <br />MONITORING REPORT <br />MOUNTAIN COAL COMPANY <br />WEST ELK MINE <br />SOMERSET, COLORADO <br />31 August 2010 <br />Prepared by <br />Fabia Terra, Ivan Wong, and Danielle Lowenthal -Savy <br />UM <br />Seismic Hazards Group <br />URS Corporation <br />1333 Broadway, Suite 800 <br />Oakland, CA 94612 <br />SECOND QUARTER <br />2010 <br />