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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 />March 21, 2014 <br />REC'OE ED <br />Mr. Rob Zuber <br />Environmental Protection Specialist MAR 25 014 <br />Colorado Division of Reclamation, Mining & Safety <br />Department of Natural Resources DMSION OF RECLAMATION <br />1313 Sherman Street, Room 215 MINING AND SAFETY <br />Denver, CO 80203 <br />RE: Colowyo Coat Company L.P., Mine Permit C -81 -019, Technical Revision No. 102, <br />West Pit Coal Road Ditch <br />Dear Mr. Zuber: <br />Tri-State Generation and Transmission Association Inc. (Tri- State) is the parent company <br />to Axial Basin Coal Company, which is the general partner to Colowyo Coal Company L.P. <br />( Colowyo). Therefore, Tri -State on behalf of Colowyo is submitting three (3) copies of <br />Technical Revision (TR) No. 102 to Permit C- 1981 -019. <br />TRA 02 revises the lower reaches (0 +00 to 5 +00) of the West Pit Coal Road Ditch, to <br />reflect previously permitted and approved design specifications for this ditch. The upper reaches <br />of the Coal Road Ditch (5 +00 to 20+82) were constructed in 1995 to the specifications included <br />in Exhibit 7 -14B Side Channel Designs — Temporary. During the review and approval of TR -96, <br />the design specifications for the Coal Road Ditch were inadvertently changed as reflected in the <br />approved Exhibit 7, Item 14, Table 1, from a vegetative "V" ditch to a trapezoidal ditch. <br />Colowyo plans to construct the final 500 feet of the Coal Road Ditch this year (2014), and under <br />this technical revision is proposing to utilize the previously approved design specifications <br />approved under TR -63. Therefore, we have included a narrative text describing the Coal Road <br />Ditch and SEDCAD output files which indicated that the previously approved design <br />specifications will suffice for the final construction of the lower reach of the Coal Road Ditch. <br />AN EQUAL OPPORTUNITY / AFFIRMATIVE ACTION EMPLOYER <br />A Touchstone Energy- Cooperative <br />CRAIG STATION ESCALANTE STATION NUCLA STATION <br />P.O. BOX 1307 P.O. BOX 577 P.O. BOX 698 <br />CRAIG, CO 81626 -1307 PREWM, NM 67045 NUCLA, CO 81424.0698 <br />970 -624 -4411 505.972 -5200 970.864 -7316 <br />