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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 />March 13, 2014 <br />Sent Via U.S. Mail & Email <br />ED <br />Environmental Protection Specialist �, 2014 <br />Colorado Division of Reclamation, Mining and Safety MIS' <br />Coal Program Support Staff )MSION OF REOLWATION <br />1313 Sherman Street AND SAFETY <br />Denver, CO 80203 <br />RE: New Horizon North Mine, Permit No. C -2010 -089 <br />Technical Revision No. 5 (TR -05) Preliminary Adequacy Review <br />Dear Mr. Boulay: <br />Tri -State Generation and Transmission Association, Inc, (Tri- State) is submitting the <br />following responses to the TR -05 Preliminary Adequacy Review on behalf of the Western <br />Fuels- Colorado, A Limited Liability Company (Western Fuels) New Horizon North Mine. <br />Tri -State is the parent of Western Fuels. The New Horizon North Mine operated under Colorado <br />Division of Reclamation, Mining and Safety (CDRMS) Permit No. C- 2010 -089. <br />Western Fuels has made the following corrections /modifications in response to the Division's <br />preliminary adequacy review letters, dated December 5, 20I3 and January 7, 2014. <br />1. The reference to Appendix 2.05.6(3) -4 on page 4 of Section 2.05.6(3) has been retained <br />and Appendix 2.05.6(3) -4c Approved Well Permits Groundwater Monitoring Wells has <br />been added. <br />2. All references proposed as part of TR -05 in the revised permit text that refer to GW -N56, <br />GW -N57 and GW -N58 as the points of compliance for the NHN Mine permit have been <br />removed. <br />The sentence on page 5 in Section 2.05.3(3) which states, "The minimum safety factor for <br />all embankments will be 1.25" has been retained. <br />4. Due to restrictions from the APCD Construction Permit, plans are being made to remove <br />the perimeter haul roads, and replace them with haul roads located within the interior of the <br />permit. These internal haul roads will be constructed on backfill material that has either <br />already been placed from previous mining or will be placed as a result of the current <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'Cwperativc CRAIG, CO 81626 -1307 PREWITT, NM 87045 NUCLA, CO 81424 -0698 <br />970824 -4411 505- 972 -5200 970 -864 -7316 <br />