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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 />March 24, 2014 <br />Mr. Rob Zuber P <br />Environmental Protection Specialist G <br />Colorado Division of Reclamation, Mining & Safety 2 7 MA <br />Department of Natural Resources MAC <br />1313 Sherman Street, Room 215 AT10N <br />Denver, CO 80203 D1010t4 OF RD SAFEn <br />MINING M <br />RE: Colowyo Coal Company L.P., Mine Permit C -81 -019, Technical Revision No. 103 <br />(TR -103), E Seam End Wall Highwall Mining South Taylor Pit <br />Dear Mr. Zuber: <br />Tri-State Generation and Transmission Association Inc. (Tri - State), is the parent <br />company to Axial Basin Coal Company, which is the general partner to Colowyo Coal Company <br />L.P. ( Colowyo). Therefore, Tri-State on behalf of Colowyo is submitting three (3) copies of TR- <br />103 to Permit C -1981 -019. <br />The E Seam on the south end wall of the South Taylor Pit was originally permitted for <br />highwall mining and approved under TR -100. Since the approval of TR -100, Colowyo has <br />identified additional mineable reserves on the E seam, west of the currently approved highwall <br />mining boundary. TR -103 proposes highwall mining the E seam farther to the west than was <br />previously approved under TR -100. Furthermore, Exhibit 23, Item 1 and Map 23A have been <br />updated reflecting the additional area proposed for highwall mining under TR -103. <br />Also included with this package are a revision application, a change of index sheet to <br />ease incorporation into the permit document, and a copy of the public notice for your review. If <br />you should have any additional questions or concerns, please feel free to contact Chris Gilbreath <br />at (303) 254 -3291. <br />BAW:TT:pvt <br />Enclosure <br />cc: Kurtis Blunt (via email) <br />Chris Gilbreath (via email) <br />Tony Tennyson (via email) <br />AN EQUAL OPPORTUNITY /AFFIRMATIVE ACTION EMPLOYER <br />A Touchstone Energy' Cooperative <br />Sincerely, <br />Barbara A. Walz <br />Senior Vice President <br />Policy & 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 />