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U.S. Department of Labor Mine Safety and Health Administration �Qt4,NEH70p�'c <br />P O Box 25367 <br />Denver, Colorado 80225 a <br />Coal Mine Safety and Health <br />District 9 sIdTES OF <br />MUG'S 6 20 <br />James Mattern <br />President & General Manager <br />Trapper Mining Inc. <br />P. O. Box 187 <br />Craig, Colorado 81626 <br />RE: Trapper Mine <br />ID No. 05-02838 <br />Ground Control Plan <br />Dear Mr. Mattern: <br />The referenced Ground Control Plan has been reviewed by MSHA personnel and <br />will be filed in the mine file in accordance with 30 CFR § 77.1000-1. The Ground <br />Control Plan dated January 25, 2016, consists of a cover letter, a Representative of <br />Miners acknowledgment letter, eight pages of text, one figure, three cross-sections, <br />and one Ground Control Map received on July 22, 2016, updating the mining areas. <br />The filing of this plan supersedes the plan filed on March 19, 2012. <br />A copy of the following geotechnical studies, which were used in the analysis of the <br />referenced ground control plan, must be available at the mine site for review: <br />Geotechnical Assessment of the K -Pit Mine Plan, Trapper Mine, Colorado, <br />53 pages, by Agapito Associates, Inc., dated April 2009. <br />Revised K -Pit Buttress Fill Stability Analysis and Recommendations, Trapper <br />Mine, Colorado, 27 pages, by Agapito Associates, Inc., dated February 2010. <br />Response to MSHA Requests from Tune 3, 2010, Meeting, 20 pages, by Agapito <br />Associates, Inc., dated July 23, 2010. <br />A copy of this plan must be made available to the miners and must be reviewed with all <br />persons affected by this plan. <br />