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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 27, 2016 <br />Mr. Brock Bowles <br />Environmental Protection Specialist <br />Colorado Division of Reclamation, Mining and Safety <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />RE: New Horizon Mine <br />Permit No. C-1981-008 <br />TR -70 Adequacy Review 2 Response <br />Dear Mr. Bowles: <br />RE�E1VED <br />N LJ1� <br />DMM'EON <br />ININGAND S <br />Tri-State Generation and Transmission Association, Inc. (Tri-State) has received your <br />adequacy review letter for TR -70, dated April 20, 2016 and provides the following responses to <br />your comments on behalf of the Western Fuels -Colorado, A Limited Liability Company (WFC) <br />New Horizon Mine. <br />Section 2.04.9 — Soil Resource Information <br />1. Item Resolved. <br />2. Topsoil placement zones 5-8 have been added to Map 2.05.4-9 and Map 2.05.4-7 will be <br />removed from the permit. The topsoil volume information that was added to Map 2.05.4-9 <br />from Map 2.05.4-7 is inconsistent. For example, topsoil pile 4 on Map 2.05.4-7 is labeled <br />as having 13,266 Cy and on Map 2.05.4-9 it is labeled with 15,123 Cy. There is also a <br />difference in volumes for topsoil piles 12A, 12B, 12C, 12D, 12E and 12E Please clarify <br />why the topsoil volumes are different. <br />Response: The topsoil volume information that was added to Map 2.05.4-9 has been <br />revised to be consistent with the information that was shown on Map 2.05.4-7 for topsoil <br />placement zones 5-8. Also, applicable pages of Section 2.05.4(2)(d) has been revised to <br />reflect these changes to the topsoil volume information. <br />Section 2.05.3(3) — Mine Facilities <br />This item was corrected as requested in the first adequacy letter for TR -70. Since the first <br />adequacy letter was submitted to Tri-State, the comment period on MR -98 closed and the <br />revised pages were incorporated. The revisions of MR -98 changed the pagination of <br />Section 2.05.3(3). Please re -submit the proposed changes of TR -70 in the new format that <br />was incorporated with MR -98. <br />Response: The proposed changes of TR -70 have been resubmitted in the new format that <br />was incorporated with MR -98. <br />AN EQUAL OPPORTUNITY/ AFFIRMATIVE ACTION EMPLOYER CRAIG STATION ESCALANTE STATION NUCLA STATION <br />-/ 1 P.O. BOX 1307 P.O. BOX 577 P.O. BOX 698 <br />A Touchstone Energy' Cooperative ]�,Tr CRAIG, CO 81626-1307 PREWITT, NM 87045 NUCLA, CO 81424-0698 <br />I `�� 970-824-4411 505-972-5200 970-864-7316 <br />