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January 12, 2026 <br />Chris Gilbreath <br />Tri-State Generation and Transmission Assoc., Inc <br />P.O. Box 33695 <br />Denver, CO 80233-0695 <br />Re: New Horizon Mine (Permit No. C-1981-008) <br />Minor Revision No. 139 (MR- 139) <br />MR-139 Midterm Review Response <br />Dear Mr. Gilbreath: <br />We have received your minor revision application to revise your permit to conduct coal mining in <br />Colorado. Our initial review indicates that all preliminary items required by the Colorado Surface <br />Coal Mining Reclamation Act, Section 34-33-101 et seq., C.R.S., have been submitted. Thus, your <br />application has been considered complete for the purposes of filing as of January 12, 2026. All review <br />and comment periods as provided in the Act and the Regulations initiate from this date of filing. <br />The Division is currently reviewing your revision application to determine whether the items you <br />have submitted are adequate in terms of meeting the requirements of the Act and Regulations. The <br />Division will either issue a decision or inform you of adequacy issues regarding the application <br />on or before January 22, 2026. <br />If you have any questions, please contact me. <br />Sincerely, <br />Clayton C. Wein <br />Environmental Protection Specialist <br />Clayton.wein@state.co.us <br />C-MR-02