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TRI -STATE GENERATION AND TRANSMISSION ASSOCIATION, INC. <br />HEADQUARTERS PO BOX 33695 DENVER. COLORADO 80233 -0695 303-452-6111 <br />May 29, 2014 RECEC) <br />JUN 0 4 2014 <br />Mr. Rob Zuber <br />Environmental Protection Specialist pMI0NOFREC110N <br />Colorado Division of Reclamation, Mining& Safety MWltOf' AND SW <br />Department of Natural Resources <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />RE: Colowyo Coal Company L.P., Mine Permit C -81 -019, Technical Revision No. 102, <br />West Pit Coal Road Ditch, Second Adequacy Response <br />Dear Mr. Zuber: <br />Tri -State Generation and Transmission Association Inc. (Tri- State), is submitting the <br />enclosed adequacy responses for Technical Revision 102 JR -102) on behalf of Colowyo Coal <br />Company L.P. (Colowyo). 'Fri-State is the parent company to Axial Basin Coal Company, which <br />is the general partner to Colowyo Coal Company L.P. (Colowyo). The Colowyo Mine operates <br />under Colorado Division of Reclamation Mining and Safety (CDRMS) Permit No. C -1981 -019. <br />Tri-State received your second adequacy letter. dated May 22, 2014 and is providing the <br />following responses to your adequacy comments for TR -102: <br />No additional response required. <br />2. In the Colowyo PAP. Exhibit ?. Item 1-4, Table I needs to be further updated to show the <br />revised design parameters for West Pit Coal Road Ditch. It appears that the stationing is <br />incorrect; the first entry for this ditch should be •'0 to 5" not "0 to 21. - Also, please see that the <br />values for floor% slope, and side slope match the SEDCAD results. <br />Response: Exhibit 7, Item 14, Table I has been updated as requested. <br />3. The copy gl'the Temporary Side Channels (page Exh. 7 -14B -2 in the PAP) provided to <br />the Division is poor. If possible, please provide a better copy. <br />Response: The Temporary Side Channels table has been updated as requested. Please note <br />that this table presents historical information for ditches that have already been constructed. <br />Many of which were constructed 10 to 20 years ago. Moreover, several ditches that were <br />previously listed on the table were removed since they were never constructed. The ditches that <br />have been removed for the table should have been removed through past permitting efforts; <br />nonetheless. removing them at this time is an effort to bring the table up to date with current <br />conditions at the Colowyo mine. <br />CRAIG STATION ESCALANTE STATION NUCLA STATION <br />P.O BOX 1307 P.O. 80X 577 P.O. BOX 698 <br />CRAIG CO 916 26 -1 307 PREWITT NM 67045 NUCLA. CO B1424-0698 <br />970- 824 -4411 505- 9725200 970 - 3647316 <br />