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DocuSign Envelope ID:OAD2D4AE-7A25-4BB6-83EB-25000E15COB9 <br /> 1 <br /> 141411TRI-STATE <br /> September 20, 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 /> Second 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 second adequacy response for permit renewal 08 (RN- <br /> 08)to Permit No. C-1981-019. <br /> Tri-State received the Division's second adequacy letter dated August 29, 2022, and is providing <br /> responses to the Division's concerns below. Adequacy comments that have been deem satisfied have <br /> been documented accordingly in this adequacy response. <br /> 1. Based on the provided information, the Division has performed an updated reclamation cost <br /> estimate for the Colowyo Mine. The total value of this estimate is $164,132,650.00 (see attached <br /> cost estimate). The Division's cost estimate is consistent with previous cost estimates approved <br /> by both the Division and Colowyo. Attached is a change sheet showing changes and updates <br /> from the last site wide estimate performed with Midterm No. 8. The Division respec�fiilly <br /> requests a response from Colowyo with any questions regarding the cost estimate or an <br /> acceptance of the Division's estimate. <br /> Response: Tri-State has reviewed the Division's reclamation cost estimate and is providing the <br /> attached spreadsheet with comments tailored directly to specific tasks. The spreadsheet reflects <br /> the summary pages of the reclamation cost estimate provided by the Division but includes a <br /> column with Tri-State comments for certain tasks. The tasks that have comments have also been <br /> colored for ease of locating comments. <br /> 2. This item has been satisfied. <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 />