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<br />EXHIBIT 60B <br />SUBSIDENCE EVALUATION <br />FOR THE SOUTH OF DIVIDE MINING AREA <br />WEST ELK MINE <br />MOUNTAIN COAL COMPANY <br /> <br />Prepared By: <br />C. Richard Dunrud, P.E. <br />Engineering Geologist <br />Adjunct Staff Member and <br />Special Advisor to <br />Wright Water Engineers, Inc. <br />818 Colorado Avenue, Suite 307 <br />Glenwood Springs, CO 81601 <br />May 2005 <br /> <br />