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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 />December 14, 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 />RECEIVED <br />Denver, CO 80203 <br />DEC 1 F 9.018 <br />RE: Colowyo Coal Company L.P. <br />Permit No. C-1981-019 <br />Division of Reclamation, <br />Technical Revision No. 130 <br />Mining & Safety <br />Gulch A Small Area Exemption <br />Dear Mr. Trujillo, <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 130 (TR -130) to Permit No. C-1981-019. <br />TR -130 proposes a small area exemption in the upper reaches of the Gulch A watershed. <br />The vast majority of reclamation units in the Gulch A watershed have been approved for Phase II <br />and III bond release. The small area exemption within the Gulch A watershed covers 2.9 acres <br />that were topsoiled and seeded in the fall of this year. As shown in the proposed Exhibit 7 Item <br />18, a grass filter for sediment control for this small reclamation parcel will suffice for sediment <br />control, and the Gulch A pond is no longer necessary. <br />Included in this technical revision are a revision application, a proposed public notice, <br />and a change of index sheet to ease incorporation of this technical revision into the permit <br />document. If you should have any additional questions or concerns, please feel free to contact <br />Tony Tennyson at (970) 824-1232 at your convenience. <br />Sincerely, <br />Daniel J. Casiraro <br />Senior Manager <br />Environmental Services <br />DJC:TT:der <br />Enclosure <br />cc: Jennifer Maiolo (BLM-LSFO) <br />AN EQUAL OPPORTUNITY /AFFIRMAT7VEACTION EMPLOYER CRAIG STATION ESCALANTE STATION NUCLA STATION <br />P.O. BOX 1307 P.O. BOX 577 P.O. BOX 6911 <br />A Touchstone EneWCooperative CRAIG. CO 91626.1307 PREWITT, NM 67045 NUCLA, CO 1"424-0698 <br />„�,� 970.924-4H1 505.976.2271 970.964.7316 <br />