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C <br />TRI-STATE GENERATION AND TRANSMISSION ASSOCIATION, INC. <br />HEADQUARTERS: P.O. BOX 33695 DENVER, COLORADO 80233-0695 <br />September 14, 2017 <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. 113 <br />Collum Ralal Road AuJ11lusf.ment <br />Dear Mr. Trujillo, <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 <br />Company L.P. (Colowyo). Therefore, Tri-State received your adequacy letter dated <br />February 27, 2017 and is providing the below response to your adequacy concerns on <br />behalf of Colowyo. The Colowyo Mine operates under Permit No. C-1981-019. <br />The Division has performed a reclamation cost estimate to reclaim 12.1 acres <br />of disturbance associated with the Collom Haul Road realignment. The total <br />value of this estimate is $339,598.16 (see attached cost estimate). The <br />Division's estimate is consistent with previous cost estimates approved by <br />both the Division and Colowyo. The Division respectfully requests a response <br />from Colowyo with any questions regarding the cost estimate or an <br />acceptance of the Division's estimate. <br />Response: Tri-State and Colowyo have reviewed the reclamation cost estimate <br />prepared by the Division, which proposes an increase in the overall reclamation <br />liability by $339,598.16, and hereby provide concurrence with the cost estimate <br />as provided. <br />If you should have any additional questions or concerns please feel free to contact <br />Tony Tennyson at (970) 824-1232 or ttenn sn(a,tristate org. <br />Sincerely, <br />Chris S. Gilbreath <br />Water, Waste and Mining <br />Compliance Manager <br />AN EQUAL OPPORTUNITY/AFFIRMATIVEAC17ON EMPLOYER CRM STATION ESCALANTE STATION NULLA STATION <br />P.O. BOX 1307 P.O. BOX 5» P.O. Box 698 <br />A Touchstone Energy'Cooperative 'CRAIG. CO 81626-13V PREWIT17, Nun 8M5 NUW1, CO 81424-0698 <br />_-t_.. 970-824.4411 '508.9x2-5280 970-864-7316 <br />