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TRI -STATE GENERATION AND TRANSMISSION ASSOCIATION, INC. <br />HEADQUARTERS: P.O. BOX 33695 DENVER, COLORADO 80233 -0695 303 - 452 -6111 <br />November 14, 2014 <br />Mr. Robert Zuber <br />N <br />Environmental Protection Specialist <br />Colorado Division of Reclamation, Mining & Safety <br />Department of Natural Resources <br />oroER &SaEe�`1 <br />1313 Sherman Street, Room 215 <br />0N��5M����9 <br />Denver, CO 80203 <br />RE: Colowyo Coal Company L.P., Permit No. C- 1981 -019, Technical Revision No. 104 <br />(TR -104), East Taylor Ditch Modification, Technical Adequacy Response <br />Dear Mr. Zuber: <br />Tri-State Generation and Transmission Association, Inc. (Tri- State), is the parent <br />company to Axial Basin Coal Company, which is the general partner to Colowyo Coal Company <br />L.P. ( Colowyo). Therefore, Tri-State on behalf of Colowyo is submitting this adequacy response <br />for TR -104 to Permit No. C- 1981 -019. Tri-State received your adequacy comments, dated <br />October 17, 2014, and the following responses have been provided to your concerns: <br />Issue 1: Map 22 of the Colowyo Mine Permit Application Package needs to be revised to show <br />the proposed pond. <br />Response: Colowyo has revised Map 22 as requested and included it in this submittal. <br />Issue 2: Please confirm that Exhibit 7, Item 14 does not require any updates due to the <br />proposed pond. The Division has identified one portion of this section, Table 1, which should be <br />revised. <br />Response: Colowyo has updated Exhibit 7, Item 14, Table 1 to show the predicted peak flow <br />reduction in the lower portion of the East Taylor Ditch as a result of the construction of ETD <br />Pond 1. <br />Issue 3: It is not clear why the pagination in Exhibit 7 -141 has changed dramatically. In your <br />submittal, the first page with text for the East Taylor Ditch is page 11. This appears to be in <br />conflict with the currently approved text for Exhibit 7441 Please revise pages or explain this <br />apparent discrepancy. <br />Response: Colowyo has included an accurate copy of the entirety of Exhibit 7 -141 as it should <br />appear in the DRMS microfiche system. Replacement of the entire section will clean up any <br />pagination issues. None of the previously existing information in the section has been modified. <br />CRAIG STATION ESCALANTE STATION NUCLA STATION <br />P.O. BOX 1307 P.O. BOX 577 P.O. BOX 698 <br />A T>t1ch1 tone ERCtm} Cooperative ?1� CRAIG, CO 81626 -1307 PREWITT, NM 87045 NUCLA, CO 61424 -0698 <br />970 -824 -4411 505- 972 -5200 970 -864 -7316 <br />