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<br />.~ <br /> <br />EXHIBIT 60 <br />SUBSIDENCE EVALUATION <br />FOR THE APACHE ROCKS <br />AND <br />THE BOX CANYON MINING AREAS <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 />2490 West 26th Avenue <br />Denver, Colorado 80211 <br />May 1996 <br />Revised February 1998 <br />r~ <br />L <br />