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TRI-STATE GENERATION AND TRANSMISSION ASSOCIATION, INC. <br /> HEADQUARTERS: P.O. BOX 33695 DENVER, COLORADO 80233-0695 303-452-6111 <br /> September 22, 2017 <br /> Mr. Brock Bowles <br /> Environmental Protection Specialist RECE�vED <br /> Colorado Division of Reclamation, Mining and Safety <br /> 1313 Sherman Street, Room 215 <br /> Denver, CO 80203 <br /> pivision of Redaf a ion, <br /> RE: New Horizon North Mine (Permit No. C-2010-089) W16119& <br /> Minor Revision No. 21 (MR-21) <br /> Updates to Air Permit and Ponds, Impoundments & Diversions <br /> Dear Mr. Bowles: <br /> Tri-State Generation and Transmission Association (Tri-State) is submitting the enclosed <br /> "Application Form for a Revision to a Coal Mining and Reclamation Permit" for a minor <br /> revision application on behalf of Elk Ridge Mining and Reclamation's (ERMR) New Horizon <br /> North Mine. Tri-State is the parent company of ERMR. The New Horizon North Mine operates <br /> under the Division of Reclamation, Mining and Safety(DRMS) Permit No. C-2010-089. <br /> MR-21 updates Appendix 2.05.6(1)-1 Air Pollution Control Permit to include the most <br /> recent approval and Section 2.05.3(4) Ponds, Impoundments and Diversions to consolidate <br /> revisions from PR-01 and RN-01. MR-21 also addresses movement of Bench 1 material in <br /> Section 2.05.3(4) to adjacent property to accommodate installation of the CC Ditch Co. pipeline. <br /> Also enclosed please find a revision application and a change of index sheet to ease <br /> incorporation of these materials in to the permit. If you have any questions about the enclosed <br /> technical revision, please contact Tony Tennyson at(970) 824-1232 or ttennysongtristate .org. <br /> Sincerely, <br /> ��) X,�� <br /> Chris S. Gilbreath <br /> Water, Waste and Mining Compliance Manager <br /> DJC:JS:der <br /> Enclosures <br /> cc: Frank Ferris (via email) <br /> Chris Gilbreath(via email) <br /> Jason Storey(via email) <br /> Tony Tennyson(via email) <br /> File: G474-11.3(21)c-5 <br /> AN EQUAL OPPORTUNITY/AFFIRMATIVE ACTION EMPLOYER CRAIG STATION ESCALANTE STATION NULLA STATION <br /> P.O.BOX 1307 P.O.COX 577 P.O.BOX 690 <br /> A Touchstone EneWCooperative4"AOtAIG.CO 01626.1307 PREMM NM 07045 NUCL&CO 81424-owe <br /> r,--� 970.04-"11 505-972-5200 970464-7316 <br />