Laserfiche WebLink
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 />February 4, 2011 <br />Kathleen G. Welt <br />Mountain Coal Company, LLC <br />P.O. Box 591 <br />Somerset, CO 81434 <br />Re: West Elk Mine <br />Technical Revison No. 124 (TR-124) <br />Addition of Maximum Projected Areal Extent of Potential Mining <br />Dear Ms. Welt: <br />COLORADO <br />D IV IS I ON OF <br />RECLAMATION <br />MINING <br />SAFETY <br />John W. Hickenlooper <br />Governor <br />Mike King <br />Executive Director <br />Loretta E. Pineda <br />Director <br />The DRMS has reviewed your letter of February 2, 2011 in which you responded to selected items in our <br />adequacy review letter of February 2, 2011. We have the following comments regarding those selected items. <br />10. The 19-degree angle of draw is acceptable. Please update all references in the permit application to reflect <br />this value. <br />11. The DRMS cannot approve TR-124 without adding to the permit application a commitment to submit <br />along with each semi-annual subsidence report an application for a Minor Revision that updates Map 51 <br />with as-built workings. The need for semi-annual updating of Map 51 has been noted in previous adequacy <br />letters for TR-124 and in an email memo from Dan Hernandez to Kathy Welt, dated August 13, 2010. The <br />need for the commitment is indicated by the following three requirements. <br />a) Information in the permit application must be current. [Rule 2.03.3(1)]. <br />b) The subsidence control plan must include a schedule for the submittal of a detailed plan of the <br />underground workings, as required by Rule 4.20.1(3) [Rule 2.05.6(6)(f)(vii)]. <br />c) At the time of revision to a permit, or for permit renewal, to the extent not previously submitted, the <br />operator shall submit a detailed plan of the underground workings. The plan shall include maps and <br />descriptions, as appropriate, of significant features of the underground mine, including the size, <br />configuration, and approximate location of pillars and entries, extraction ratios, measures taken to <br />prevent or minimize subsidence and related damage, areas of full extraction, and other information <br />requested by the Division for good cause shown. Upon request of the operator, information submitted <br />with the detailed plan may be held confidential, in accordance with Rule 2.07.5(1)(b) [Rule 4.20.1(3)]. <br />Sincerely, <br />V1eL.. K(-, <br />Tom Kaldenbach <br />Environmental Protection Specialist <br />cc: Dan Hernandez, DRMS <br />Office of Office of <br />Mined Land Reclamation Denver • Grand junction • Durango Active and Inactive Mines