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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 /> June 26, 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 �w „Q <br /> RE: Colowyo Coal Company L.P. 01� <br /> Permit No.C-1981-019 <br /> Technical Revision No. 122 oRR em <br /> Haul Road A Upper and Lower DitchesM`�`�g& <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 122 (TR-122)to Permit No. C-1981-019. <br /> TR-122 proposes an Upper and Lower Ditch near the toe of the fill on Haul Road A. Haul <br /> Road A is currently being expanded to support moving mining equipment to and from the <br /> Collom operation from the current facilities and South Taylor Pit. To ensure the long-term <br /> stability of the fill material from becoming saturated and failing, the Upper and Lower Ditches <br /> will route water down away from the toe of the fill at Haul Road A. <br /> Also included with this technical revision are a revision application, a proposed public <br /> notice, and a change of index sheet to ease incorporation into the permit document. If you <br /> should have any additional questions or concerns please feel free to contact Tony Tennyson at <br /> (970) 824-1232 or ttenn- son -,tristategt.org. <br /> Sincerely, <br /> Q�' / ��t't�3 <br /> Daniel J. Casiraro <br /> Senior Manager <br /> Environmental Services <br /> DJC:TT:der <br /> Enclosure <br /> AN EOUAL OPPORTUNITY/AFFIRMATIVE ACTION EMPLOYER CRAIG STATION ESCALANTE STATION NUM STATION <br /> P.O.BOX 1307 P.O.BOX 577 Ro.BOX 188 <br /> A Touchstone Energq'Cooperative �R CRAIG,tb 0106.1307 PREWflT,NM 87015 NUcu►,CO 81121.0,x, <br /> r� 970-8244411 505-876-2271 970.0647316 <br />