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COLORADO <br />Division of Reclamation, <br />Mining and Safety <br />August 7, 2018 1 Department of Natural Resources <br />1313 Sherman Street, Room 215 <br />Tony Tennyson Denver, CO 80203 <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 />Technical Revision No. 121 (TR -121) <br />Adequacy Review <br />Dear Mr. Tennyson: <br />After reviewing TR -121 from Colowyo Coal Company L.P. (Colowyo), the Division has the following <br />comments: <br />1. On proposed Volume 15, Rule 4, Page 4, the page is missing all discussions regarding Sections <br />4.05.1— 4.05.5 that is on currently approved Page 4. Please included these Sections in the proposed <br />page Volume 15, Rule 4, Page 4. <br />2. Please update proposed Map 13C-1 Sheetl to include the revised disturbance boundary approved <br />with MR -188. <br />3. As discussed between the Division and Colowyo, a reclamation cost estimate (RCE) to reclaim the <br />disturbances associated with TR -121 will be performed once the temporary suspension on conducting <br />RCEs has been lifted. <br />If you have any questions, feel free to contact me at any time. <br />Sincerely, <br />Zach Trujillo <br />Environmental Protection Specialist <br />(303) 866-3567 ext. 8164 <br />Zach.Trujillo@state.co.us <br />1313 Sherman Street, Room 215, Denver, CO 80203 P 303.866.3567 F 303.832.8106 http://mining.state.co.us <br />John W. Hickenlooper, Governor I Robert W. Randall, Executive Director I Virginia Brannon, Director <br />flF'C-0 <br />H <br />I <br />'F1876 <br />