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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 />April 10, 2015 <br />Mr. Brock Bowles <br />Environmental Protection Specialist <br />Colorado Division of Reclamation, Mining and Safety <br />1313 Sherman Street, Room 215 Q <br />Denver, CO 80203 R�C'�,Ive <br />RE: New Horizon Mine (Permit No. C- 1981 -008) ApR J01s <br />Technical Revision 67 (TR -67) lion, <br />Adequacy Review No. 1 Responses D���S%on o{ peSateti`! <br />Dear Mr. Bowles: <br />Tri-State Generation and Transmission Association, Inc. (Tri- State) has received your <br />adequacy review letter for TR -67 dated March 31, 2015 and provides the following responses on <br />behalf of Western Fuels - Colorado, A Limited Liability Company (WFC) New Horizon North. <br />2.05.3(3) - Mine Facilities <br />On Table 2.05.3(3) -3, task 7 is "pave 27 Road and BB Road in original location and <br />restore Sunshine Ranch Corner intersection" and the date is listed as pending (waiting <br />for a contractor to mobilize into the area). Is the date still correct? <br />Response: The completion date on Table 2.05.3(3) -3 for Task 7 has been changed to <br />2010. The Sunshine Ranch Corner and the paved sections of 27.00 and BB road were <br />completed in 2010 as indicated on updated Table 2.05.3(3) -3. <br />2.05.3(4) — Ponds, Impoundments, other treatment facilities and diversions <br />1. The proposed as -built Map 2.05.3(3) -4 -2 shows a storage capacity of 0.063 ac. /ft. at <br />elevation 5647.0 ft. (bottom of pond) while the current SEDCAD in the permit of March <br />2006 shows 0.00 ac. /ft. at the same elevation. Please clarify the proper storage capacity <br />at the 5647.0 ft. elevation for Pond 008. <br />Response: The stage storage curve on Map 2.05.3(3) -4 -2 has been revised to accurately <br />show storage capacity beginning between elevation 5,647.0 ft. and 5,648.0 ft. rather than <br />at 5,647.0 ft. (bottom of pond). Also, the 10 Yr. -24 Hr. SEDCAD demonstration has been <br />AN EQUAL OPPORTUNITY /AFFIRMATIVE ACTION EMPLOYER CRAIG STATION ESCALANTE STATION NUCLA STATION <br />P.O. BOX 1307 P.O. BOX 577 P.O. BOX 698 <br />A Touchstone Energy'Cooperative It CRAIG, CO 81626 -1307 PREWITT, NM 87045 NUCLA, CO 81424 -0698 <br />970- 824 -4411 505- 972 -5200 970 -864 -7316 <br />