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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 8, 2018 <br />Mr. Zach Trujillo <br />Environmental Protection Specialist <br />Colorado Division of Reclamation, Mining & Safety <br />Department of Natural Resources <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />RE: Colowyo Coal Company L.P. <br />Permit No. C-1981-019 <br />Technical Revision No. 121 <br />Adequacy Response <br />Dear Mr. Trujillo, <br />ft <br />gis <br />wSION of �q cp <br />M�NN�� W <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). Tri-State received your adequacy letter dated August 7, 2018 and is providing <br />the response below to your adequacy concern on behalf of Colowyo. The Colowyo Mine <br />operates under Permit No. C-1981-019. <br />1. On proposed Volume 15, Rule 4, Page 4, the page is missing all discussions regarding <br />Sections 4.05.1— 4.05.5 that is on currently approved Page 4. Please include these <br />Sections in the proposed page Volume 15, Rule 4, Page 4. <br />Response: A page break has been removed from Rule 4, Page 4, and that has corrected <br />the issues of Sections 4.05.1 through 4.05.5 not appearing on Rule 4, Page 4. <br />2. Please update proposed Map 13C-1 Sheet 1 to include the revised disturbance boundary <br />approved with MR -188. <br />Response: Map 13C-1 Sheet 1 has been updated with the topsoil removal boundary <br />approved under MR -188 as requested. <br />3. As discussed between the Division and Colowyo, a reclamation cost estimate (RCE) to <br />reclaim the disturbances associated with TR -121 will be performed once the temporary <br />suspension on conducting RCEs has been lifted. <br />Response: Colowyo needs to construct this power line in the fall of this year. Therefore, <br />it is becoming business critical that this technical revision and the temporary suspension <br />of RCE's be resolved in a very timely manner. <br />AN EQUAL OPPORTUNITY/AFRRNATIVEACTION EMPLOYER <br />A Touchstone Energy Cooperative O. -A <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 PREWRT. NM 87015 NUCLA, CO 61424.0698 <br />970-821.4411 505-876-2271 97"64-7316 <br />