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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 />January 6, 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. 109 (TR -109) <br />Alluvial Valley Floor Assessment <br />Dear Mr. Trujillo, <br />RECEIVED <br />AN 0 9 2017 <br />Division of RedMVAb% <br />Mining & Safety <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 <br />technical revision 109 (TR -109) to Permit No. C-1981-019. <br />TR 109 contains an Alluvial Valley Floor (AVF) assessment for disturbances (Collom <br />Haul Road) proposed to occur along Wilson Creek to comply with Stipulation 10 on Permit No. <br />C-1981-019. TR -109 also provides a further assessment of potential AVF's on Little Collom <br />Gulch. <br />With this submittal of TR -109, Tri-State is requesting that the Division note that <br />Stipulation 10 has been complied with, in the permit system. Formal documentation noting that <br />Stipulation 10 has been complied with, is also requested from the Division. <br />Also included in this revision application is a change of index sheet to ease incorporation <br />into the permit document, a revision application, and public notice for your approval. If you <br />should have any additional questions or concerns please feel free to contact Tony Tennyson at <br />(970) 824-1232 at your convenience. <br />DJC:TT:dbr <br />Enclosure <br />AN EQUAL OPPORTUNITY/AFFIRMATIVE ACTION EMPLOYER <br />A Touchstone Energy'Coopemme <br />Sincerely, <br />Daniel J. Casiraro <br />Senior Manager <br />Environmental Services <br />CRAIG STATION ESCALANU STATION NUCLA STATION <br />P.O. Box 1507 P.O. BOX 577 P.O. Box 6" <br />CRAIG. CO 81626.1907 PREWIR, NM 67W5 NULLA. CO 811244)698 <br />970-821-M11 505-972-5200 970-861-7916 <br />