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STATE OF COLORADO <br />DIVISION OF RECLAMATION, MINING AND SAFETY <br />Department of Natural Resources <br />1313 Sherman St., Room 215 <br />Denver, Colorado 80203 <br />Phone: (303) 866.3567 <br />FAX: (303) 832-8106 <br />COLORADO <br />D I V I S ION OF <br />RECLAMATION <br />MINING <br />SAFETY <br />December 29, 2010 Bill Ritter, Jr. <br /> Governor <br />Kathleen G. Welt Mike King <br />Mountain Coal Company, LLC Executive Director <br />O. Box 591 <br />P Loretta E. PlAeda <br />. <br />Somerset, CO 81434 Director <br />Re: West Elk Mine <br />Report titled "Spring 2010 Subsidence and Geologic Observations" <br />Dear Ms. Welt: <br />The DRMS has completed a preliminary review of the West Elk Mine's Spring 2010 subsidence <br />report. Although the report is well-organized and provides extensive documentation of subsidence <br />impacts at the West Elk Mine, some of the supporting data appears to have been omitted. Please <br />provide the following data, so that we may complete our review. <br />1. Monitoring data in Appendix B for Panel El survey stations 1 through 124. Data for stations <br />200 through 319 have been provided in Appendix B of previous reports, but data for stations 1 <br />through 124 have not been provided. <br />2. Tables and graphs in Appendix C that document movement of the Monument Dam, as <br />provided in previous reports. <br />Sincerely, <br />wK <br />Tom Kaldenbach <br />Environmental Protection Specialist <br />cc: Dan Hernandez, DRMS <br />Office of Office of <br />Mined Land Reclamation Denver • Grand lunctinn • (luranan Anivn ?nrl lnartkm AAince