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COLORADO <br /> Division of Reclamation, <br /> Mining and Safety <br /> Department of Natural Resources <br /> 1313 Sherman Street, Room 215 <br /> Denver, CO 80203 <br /> August 29,2022 <br /> Tony Tennyson <br /> Colowyo Coal Company L.P. <br /> 5731 State Highway 13 <br /> Meeker,CO 81641 <br /> Re: Colowyo Coal Mine (Permit No. C-1981-019) <br /> Permit Renewal No.08(RN-08) <br /> Second Adequacy Review <br /> Dear Mr.Tennyson: <br /> After reviewing RN-08 from Colowyo Coal Company L.P.(Colowyo),the Division has the following <br /> comment: <br /> 1. Division: 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 MR- <br /> 243 when reviewing Map 29. Based on the reclamation progression of the West Pit and South Taylor <br /> Pit, these parcels no longer match last site wide cost estimate performed with Colowyo Mine RN-07. <br /> In order for the Division to perform an accurate updated reclamation cost estimate for the Colowyo <br /> Mine,please provide the Division with the volumes associated with the each of the reclamation parcels <br /> for the West and South Taylor Pits as shown on approved Map 29. <br /> Colowyo: A spreadsheet has been provided to the Division which contains all cut/fill balances and <br /> centroid to centroid haul; distances for all the polygons shown on Map 35A. <br /> Based on the provided information,the Division has performed an updated reclamation cost estimate <br /> for the Colowyo Mine. The total value of this estimate is$164,132,650.00(see attached cost estimate). <br /> The Division's cost estimate is consistent with previous cost estimates approved by both the Division <br /> and Colowyo.Attached is a change sheet showing changes and updates from the last site wide estimate <br /> performed with Midterm No. 8. The Division respectfully requests a response from Colowyo with <br /> any questions regarding the cost estimate or an acceptance of the Division's estimate. <br /> 2. Division: The proposed Volume 15-List ofFigures has been updated with NIR-242 since the Division <br /> received the RN-08 application. Please provide an updated Volume 15-List of Figures including the <br /> approved changes with MR-242. <br /> pF C010 <br /> cam' O <br /> 1313 Sherman Street, Room 215, Denver, CO 80203 P 303.866.3567 F 303.832.8106 http://mining.state.co.us <br /> Jared S. Polis, Governor I Dan Gibbs, Executive Director I Virginia Brannon, Director 1j <br />