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COLORADO <br />Division of Reclamation, <br />Mining and Safety <br />Depar meat of Natural Resources <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />May 22, 2014 <br />Chris Gilbreath <br />Tri -State Generation and Transmission Association, Inc. <br />P.O. Box 33695 <br />Denver, CO 80233 -0695 <br />Re: Colowyo Mine (Permit No. C- 1981 -019), TR -102, second adequacy letter <br />Dear Mr. Gilbreath: <br />We received your adequacy response for TR -102 on May 9, 2014. There are still some items to be addressed <br />before the Division can approve this revision. <br />1. No additional response required. <br />2. In the Colowyo PAP, Exhibit 7, Item 14, Table 1 needs to be further updated to show the revised <br />design parameters for West Pit Coal Road Ditch. It appears that the stationing is incorrect; the <br />first entry for this ditch should be "0 to 5" not "0 to 21." Also, please see that the values for flow, <br />slope, and side slope match the SEDCAD results. <br />3. The copy of the Temporary Side Channels (page Exh. 7 -1413-2 in the PAP) provided to the <br />Division is poor. If possible, please provide a better copy. <br />4. The Division did not receive the revised version of page Exh. 7-14F-31. Please send this in next <br />submittal. <br />If you have any questions, please contact me at 303.8663567 (extension 8113) or Rob.Zuber @state.co.us. <br />Sincerely, <br />Robert Zuber, P.E. <br />Environmental Protection Specialist <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. Hickentooper, Governor I Mike King, Executive Director I Virginia Brannon, Director <br />pp` cow <br />*1876X/ <br />