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.MOUNTAIN COAL <br />~~ ~ COMPANYL.L.t:. <br />A Subsidiuy of Arch Wcs~em Reecwces, LLC <br />September 24, 1998 <br />Mr. Jim Burnell <br />Colorado Division of Minerals and Geology <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />RECEIVED <br />SEP 2 5 1998 <br />Df4. OF MINERALS <br />8 GEOLOGY <br />West Elk Mine <br />POBox 391 <br />3174 Highway 133 <br />~mersel, CO 81434 <br />(970)929-3015 <br />'ax (970)929-3393 <br />RE: Technical Revision No. 84 (Landslide Corrective Measures); West Elk Mine; <br />Permit No. C-80-007 <br />Dear Jim: <br />Mountain Coa] Company, LLC (MCC) has reviewed ]im Pendleton's memo dated August 14, <br />1998, regarding the above-referenced technical revision, and provides the following and attached <br />information. <br />MCC, through its consultant Barr Engineering, has revised the discussion about the factor of <br />safety and the stability for long-term conditions contained in the report for Exhibit 14C, which <br />was provided with the original technical revision application. Information has been added to the <br />report regarding the monitoring program that will be conducted over the long-term, as well as a <br />commitment to reevaluate the reclamation plan after at least five years of data have been <br />collected. This will allow a sufficient amount of data to be collected through several climatic <br />conditions. We have also added an Appendix F to the report, which is a risk analysis of the <br />existing landslide. <br />Please call if you have any questions. <br />Sincerely, <br />,~ <br />Christine E. <br />Permitting S <br />cc: Norm Every <br />Phil Schmidt <br />Kathy Welt <br />tr84a.doc <br />