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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 />August 13, 2014 <br />Mr. Michael P. Boulay, P.G. <br />Environmental Protection Specialist <br />Colorado Division of Reclamation, Mining and Safety <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />RE: New Horizon Mine (C- 1981 -008) <br />Technical Revision No. 64 (TR -64) <br />Trench Drain Design <br />Dear Mr. Boulay: <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 application for the New Horizon Mine is being submitted to change the <br />type of connection(s) to be used at the trench drain nexus, and to revise the outlet location so that the <br />trench drain will discharge into the Pond 013 flume rather than into the pond. Finally, the Trench Drain <br />Design in Attachment 2.05.3(3) -25 will be moved to Attachment 2.05.3(3) -26 to avoid confusion with <br />another Attachment 2.05.3(3) -25 that addresses the Second Park Lateral Relocation Piping. Please refer <br />to the attached Change Sheet for a list of the maps or pages that have been added or removed by this <br />technical revision application. <br />If you have any questions about the enclosed revision, please contact Chris Gilbreath at (303) <br />254 -3291 or cgilbreathntri state gq.org. <br />BAW:JS:pvt <br />Enclosure <br />cc: Mike Boulay, DRMS (Grand Junction) <br />Chris Gilbreath (via email) <br />Jason Storey (via email <br />AN EQUAL OPPORTUNITY; AFFIRMATIVE ACTION EMPLOYER <br />A Touchstone Energy Cooperative <br />T� <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 -924 -4411 505- 972 -5200 970 -B64 -7316 <br />