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iii iin~iiiiiiiiii~s <br />999 <br />STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Department of Natural Resources <br />1 }1 } Sherman SI ,Room 215 <br />Denver, (:O 80203 <br />Phone. (3031 866-3 567 <br />FAX:(30]1832-8106 <br />November 1, 1993 <br />Ms. Kathleen Welt <br />Mountain Coal Company <br />P.O. Box 591 <br />Somerset, CO 81434 <br />of Soto <br />ti`O.' 'P <br />Nom.: <br />O <br />~~~' ~y.• <br />Roy Rumer <br />Governor <br />Michael B. Lung <br />Division Di~egor <br />RE: Technical Revision No. 66; Aest Elk Mine; File No. C-80-007 <br />Dear Ms. Welt; <br />The Division has reviewed Mountain Coal Company's application for <br />a technical revision which proposes to repair a small slump west of <br />ditch and berm D2R-2 and extend the southwest portion of the refuse <br />pile over this area as a buttress. Enclosed is a memo from Jim <br />Pendleton who has participated in the review of this revision. <br />Please consider his adequacy concerns and respond to the Division <br />by November 10, 1993. <br />In addition, MCC should update Map 54 with the location of the new <br />underdrain. Also, Figure 1.0, Existing Pile Contours, in Exhibit <br />51 should be updated with the information shown on the map provided <br />with this revision. <br />Please call if you have any questions. <br />Sifjc~rely <br />Christine E. <br />Environmental <br />Specialist <br />CEJ/007.66 <br />