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DocuSign Envelope ID: FCBDBF4A-72AB-4AB6-8FB5-FF84C1348EOF <br /> 1 <br /> 141411TRI-STATE <br /> August 10, 2022 <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 /> Permit Renewal No. 08 (RN-08) <br /> Adequacy Response <br /> Dear Mr. Trujillo, <br /> Tri-State Generation and Transmission Association Inc. (Tri-State),is the parent company to Axial <br /> Basin Coal Company,which is the general partner to Colowyo Coal Company L.P. (Colowyo). Therefore, <br /> Tri-State on behalf of Colowyo is submitting this adequacy response for permit renewal 08 (RN-08) to <br /> Permit No. C-1981-019. <br /> Tri-State received the Division's adequacy letter dated July 25, 2022, and has the following <br /> responses to the Division's concerns: <br /> 1. The Division has reviewed Colowyo's reclamation plan and associated reclamation cost <br /> estimate. The reclamation parcels for the West Pit and South Taylor Pit were last updated with <br /> AR?-243 when reviewing Map 29. Based on the reclamation progression of the West Pit and <br /> South Taylor Pit, these parcels no longer match last site wide cost estimate performed with <br /> Colowyo Mine RAT-0 7. In order for the Division to perform an accurate updated reclamation cost <br /> estimate for the Colowyo Mine,please provide the Division with the volumes associated with the <br /> each of the reclamation parcels for the West and South Taylor Pits as shown on approved Map <br /> 29. <br /> Response: A spreadsheet has been provided to the Division which contains all cut/fill balances <br /> and centroid to centroid haul distances for all the polygons shown on Map 35A. <br /> 2. The proposed Volume 15 -List of Figures has been updated with MR-242 since the Division <br /> received the RN-08 application. Please provide an updated Volume 15-List of Figures including <br /> the approved changes with AM-242. <br /> P.O.BOX 33695 <br /> DENVER,CO 80233-0695 A Touchstone Energy <br /> 303-452-6111 Cooperative <br /> b R K` <br /> WWW.TRISTATE.COOP <br />