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t TRI -STATE GENERATION AND TRANSMISSION ASSOCIATION, INC. <br />HEADQUARTERS: P.O. BOX 33695 DENVER, COLORADO 80233 -0695 303 - 452 -6111 <br />January 30, 2015 <br />Mr. Brock Bowles <br />RECEIVED <br />Environmental Protection Specialist <br />Colorado Division of Reclamation, Mining and Safety <br />1313 Sherman Street, Room 215 <br />FEB 0 2 2015 <br />Denver, CO 80203 <br />DIVISION OF RECLAMATION <br />RE: New Horizon Mine C- 1981 -008 <br />(C-1981-008) <br />MINING AND SAFETY <br />Technical Revision No. 66 (TR -66) <br />Dryland Pasture Reference Area <br />Dear Mr. Bowles: <br />Tri-State Generation and Transmission Association, Inc. (Tri- State) is submitting the enclosed <br />"Application Form for a Revision to a Coal Mining and Reclamation Permit" for a technical revision <br />application on behalf of the Western Fuels - Colorado, A Limited Liability Company (Western Fuels - <br />Colorado) New Horizon Mine. Tri-State is the parent company of Western Fuels - Colorado. The New <br />Horizon Mine operates under Colorado Division of Reclamation, Mining and Safety (CDRMS) Permit <br />No. C -1981 -008. <br />This technical revision proposes a new dryland pasture reference area for the New Horizon Mine. <br />The currently approved dryland pasture reference area is located adjacent to the Nucla Airport, and <br />Western Fuels - Colorado (WFC) is unable to control the area, which is required by Rule 4.15.7(3)(bxii). <br />Once it was identified that control was no longer possible, WFC identified several areas that control could <br />be maintained, were representative of the geology, soil, slope, and vegetation in the permit area, and each <br />area was evaluated in comparison to the currently approved dryland reference area. Attachment <br />2.05.4(2)(e) -4 has been updated to present the results of this comparison and proposed a previously <br />approved dryland pasture reference area for the New Horizon Mine. <br />Enclosed you will find a revision application form, a change of index sheet to ease incorporation <br />of these materials into the permit document, and the proposed public notice for your review. If you have <br />any questions about the enclosed technical revision, please contact Tony Tennyson at (970) 824 -1232 at <br />your convenience. <br />BAW:TT:pvt <br />Enclosures <br />AN EQUAL OPPORTUNITYIAFFIRMATIVE ACTION EMPLOYER <br />A Touchstone Energy'Cooperative <br />Sincerely, <br />Barbara A. Walz <br />Senior Vice President <br />Policy and Compliance <br />Chief Compliance Officer <br />CRAIG STATION ESCALANTE STATION NUCLA STATION <br />P.O. BOX 1307 P.O. BOX 577 P.O. BOX 698 <br />CRAIG, CO 81626 -1307 PREWITT, NM 87045 NUCLA, CO 81424 -0698 <br />970- 824 -4411 505- 972 -5200 970- 864 -7316 <br />