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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 />February 2, 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 <br />RE: Colowyo Coal Company L.P. <br />Permit No. C-1981-019 <br />Technical Revision No. 116 <br />Second Adequacy Response <br />Dear Mr. Trujillo, <br />RECEIVED <br />FEB 0 j 2018 <br />DIVISION OF RECLAMATION, <br />MINING AND SAFETY <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 />The Colowyo Mine operates under Permit No. C-1981-019. Tri-State received your adequacy letter dated <br />February 1, 2018, and is providing the response below to your adequacy concern on behalf of Colowyo. <br />It should be noted that all adequacy comments that have been deemed resolved, the original comment has <br />not been retained under this cover. Adequacy comments that have not be resolved only the most recent <br />comment has been included with these responses. <br />1. This item is resolved. <br />2. The text was updated to remove the reference, however on further review a similar reference was <br />found in the first paragraph on proposed revised page 118. Please reword the text to remove the <br />second reference to the deleted figures. <br />Response: The references to Figures 2.05.6-1 and -2 have been removed on Rule 2, Page 118 as <br />requested. <br />3. This item is resolved. <br />4. This item is resolved. <br />5. At the request of Colowyo Coal Company, and in recognition of the potential conflicts between <br />their construction schedules and the permitting schedules of other state agencies, stipulations 19 <br />and 20 are proposed to be modified, and stipulation 23 is proposed to be added. The proposed <br />text of the stipulations is asfollows: <br />ST 19: OBTAIN DEWATERING WELL PERMITS AND SUBMIT A MINOR REVISION. <br />DEWATERING WELL PERMITS MUST BE IN PLACE, AND A MINOR REVISION BE <br />SUBMITTED AND APPROVED BY THE DIVISION TO UPDATE SECTION 2.03. 10 OF <br />VOL UME I OF THE PERMIT APPLICA TION PA CKA GE, BEFORE THE CONSTRUCTION OF <br />ANY DEWATERING WELLS ASSOCIATED WITH THE COLLOM PIT IS ALLOWED TO <br />OCCUR. <br />AN EQUAL OPPORTUNITY/AFFIRMATIVE ACTION EMPLOYER CRAIG STATION ESCALANTE STATION NUCLA STATION <br />PO. sox 1307 Y.O. Box 977 Y.O. Box 698 <br />A Touchstone EneWCooperadve OA CBAN;, CO 81626.1307 YrtEwrtT, NM $7045 NULLA, CO 01424-0698 <br />970•826.4411 SOS -07a2271 970.064-7316 <br />