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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 />November 22, 2016 <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: Colowye Coal Company L.P. <br />Permit No. C-1981-019 <br />Minor Revision No. 167 <br />Trout Creek Well <br />Dear Mr. Trujillo, <br />IS �• wW r.a <br />LU O <br />pN1., p OF RFS'-,AT{VN <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 />minor revision 167 (MR -167) to Permit No. C-1981-019. MR -167 provides baseline data on the <br />recently drilled Trout Creek monitoring well. <br />Stipulation 18 to Permit No. C-1981-019 requires Colowyo to drill the Trout Creek well, <br />and once drilled, submit a minor revision to the permit to describe the well, to update Tables <br />2.04.7-38, -39, -40, and -41, and to update Maps IOB and I IC. Further, Stipulation 18 requires <br />Colowyo to submit the minor revision within 90 days after completing the Trout Creek Well. <br />The Trout Creek Well was completed on November 1, 2016; therefore the submittal of <br />MR- 167 is well within the required 90 days to submit the minor revision from the completion <br />date of the well. Additionally, MR -167 is updating Tables 2.04.7-38, -41 and Map 11 C as <br />required by Stipulation 18. Map l OB was not updated as the Trout Creek well location was <br />provided and approved under permit revision 04 (PR -04). <br />Tables 2.04.7-39, and -40 contain aquifer baseline aquifer test results. Stipulation 18 <br />notes that these tables are required to be updated in the submittal of the minor revision. Per Tri - <br />State's March 31, 2016 adequacy response letter for PR -04, Item 80, it was indicated to the <br />Division that aquifer testing for the Trout Creek well would not provide any additional data that <br />had not already been obtained from aquifer testing for three other Trout Creek wells (wells W- <br />95-15, W-95-02, and UL -95-45). Tables 2.04.7-39 and -40 already contain baseline data for <br />these wells noted previously. The Division responded in a letter dated April 21, 2016, and <br />indicated that the request to not perform aquifer testing for the Trout Creek well was deemed <br />sufficient; therefore, these two tables have not been updated. Please see item 80 in the <br />Division's April 21, 2016 letter. <br />Finally, with submittal of this minor revision Stipulation 18 is being addressed, and Tri- <br />State requests that the Division note that Stipulation 18 has been complied with in the permit <br />system. <br />AN EQUAL OPPORTUNITY /AFFIRMATIVE ACTION EMPLOYER <br />A Touchstone Energy' Cooperative <br />CRAIG STATION E5CALANTE STATION NUCLA STATION <br />P.O. Box 1307 P.O. BOX 577 P.O. Box 691 <br />CRAIG, CO 11126-1307 POW", NIA 17015 NUCLA, CO $1421-069! <br />970-824-4411 505.972-5200 970-$61-7316 <br />