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<br />U.S. Department of Labor <br />Mine Safety and Health Administration <br />P.O. Box 25367 <br />Denver, Colorado 80225-0367 <br />Coal Mine Safety and Health <br />District 9 <br />JAN 2 s 200 <br />Raymond G. DuBois <br />President & General <br />Trapper Mining Inc. <br />P.O. Box 187 <br />Craig, CO 81626 <br />Manager <br />RE: Trapper Mine <br />ID No. 05-02838 <br />Technical Support <br />Ground Failure - <br />Dear~Mr. DuBois: <br />pM1M4NT p,' <br /><< <br />i` <br />Z L <br />A <br />R~ ' e <br />'ET~TES ESE <br />REt'EJ~lE® <br />JAN 2 A 2007 <br />Division of Recia -ration, <br />Mining and Safety <br />Investigation <br />G-1 Dip Pit <br />A copy of the referenced Pittsburgh Safety and Health Technology <br />Center report is enclosed. The report, dated December 14, 2006, <br />summarizes ground conditions and includes ground control <br />recommendations. <br />The ground control recommendations should be evaluated by your <br />staff. The pertinent recommendations should be incorporated into <br />the ground control plan employed by the mine. <br />If you have any questions regarding the report, please contact <br />Kathleen Kelleher, at 970-874-7637, or Billy Owens, at 303-231- <br />5590. <br />Sincerely, <br />. /'~ <br />Al C. Davis <br />Di trict Manager <br />Enclosure <br />