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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 />July 11, 2019 <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 />�,�c�� �d <br />Denver, CO 80203 <br />JUL <br />RE: Colowyo Coal Company L.P. <br />y <br />�slsAKV �1 <br />Permit No. C-1981-019 <br />Technical Revision No. 132 <br />Section 16 Pond Hydrology <br />Dear Mr. Trujillo, <br />Tri-State Generation and Transmission Association Inc. (Tri-State), is the parent company to <br />Axial Basin Coal Company, which is the general partner to Colowyo Coal Company L.P. (Colowyo). <br />Therefore, Tri-State on behalf of Colowyo is submitting three (3) copies of technical revision 132 (TR - <br />132) to Permit No. C-1981-019. <br />TR -132 provides a revised surface hydrology model for the Section 16 Pond watershed to <br />appropriately delineate the sub -watersheds, and proposes a curve number for Phase III release lands. <br />Included in this technical revision are a revision application, a proposed public notice, and a <br />change of index sheet to ease incorporation of this technical revision into the permit document. If you <br />should have any additional questions or concerns, please feel free to contact Tony Tennyson at (970) 824- <br />1232 at your convenience. <br />DJC:TT:der <br />Enclosure <br />cc: Jennifer Maiolo (BLM-LSFO) <br />Chris Gilbreath (via email) <br />Tony Tennyson (via email) <br />Angela Aalbers (via email) <br />File: C. F. 1.1.2.121 <br />G471 -11.3(21)d <br />Aq EOU.NL OPPORTUNITY , 4FFJRM4T1✓E 4CTJON EMPLC'4ER <br />A Touchstone Energy'Cooperative Atlt-,fie <br />Sincerely, <br />r <br />Daniel J. Casiraro <br />Senior Manager <br />Environmental Services <br />CRAIG STATION ESCALANTE STATION NULLA STATION <br />P.O. BOX 1307 P.O. BOX 577 P.O. BOX 696 <br />CRAIG, CO 81626-1307 PREWITr, NM 87045 NUCLA, CO 81424-0698 <br />970.824.4411 505.676-2271 970-664.7316 <br />