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u <br />TRI-STATE GENERATION AND TRANSMISSION ASSOCIATION, INC. <br />HEADQUARTERS: P.O. BOX 33695 DENVER, COLORADO 80233-0695- <br />March 20, 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 />Minor Revision No. 182 <br />Raw Water Pipeline <br />Dear Mr. Trujillo, <br />RECEIVED <br />MAR 2 2 2018 <br />Division of &eI' <br />Mining Safeti <br />303-452-6111 <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 March 19, 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. Proposed Map 22 has been labeled as Existing Structures — North Area. This title <br />already exists for Map 21. Please revise the map name for Map 22. <br />Response: The name for Map 22 has been revised as requested. <br />2. The Division has performed a reclamation cost estimate to reclaim the disturbances <br />associated with the raw water line expansion. The total value of this estimate is <br />$1,460.14 (see attached cost estimate). The Division's cost estimate is consistent with <br />previous cost estimates approved by both the Division and Colowyo. The Division <br />respectfully requests a response from Colowyo with any questions regarding the cost <br />estimate or an acceptance of the Division's estimate. <br />Response: The reclamation cost estimate for MR -182 has been review, and Colowyo <br />concurs with the Division's estimate for this minor revision. <br />AN EOUAL OPAORTVNfTY/AFPRMATTVEACTJON EMPLOYER CRAIG STATION ESCALANTE STATION NUCLA STATION <br />,,! P.O. BOX 1307 P.O. BOX 577 P.O. BOX Egg <br />A Touchstone EnerWCooperative Kltx 07AX7, CO g16z6.1307 MWITT, NM 87045 NUC A, CO 81424 -OM <br />�+ \\ 970.821-4411 505-07Cr2271 970.864.7316 <br />