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r <br />TRI-STATE GENERATION AND TRANSMISSION ASSOCIATION, INC. <br />HEADQUARTERS: P.O. BOX 33695 DENVER, COLORADO 80233-0695 303-452-6111 <br />December 17, 2018 <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 (Permit No. C-1981-008) <br />Technical Revision No. 87 (TR -87) <br />Pond 013 Erosion Protection Inlet <br />Dear Mr. Bowles: <br />RECEIVED <br />cGn 17 Z018 <br />D vision of ReCt wition, <br />Mining & Safety <br />Tri-State Generation and Transmission Association (Tri-State) is submitting the enclosed <br />"Application Form for a Revision to a Coal Mining and Reclamation Permit" for a technical <br />revision application on behalf of the Elk Ridge Mining and Reclamation's (ERMR) New <br />Horizon Mine. Tri-State is the parent company of ERMR. The New Horizon Mine operates <br />under the Division of Reclamation, Mining and Safety (DRMS) Permit No. C-1981-008. <br />TR -87 proposes construction of an erosion protection inlet into Pond 013 to <br />accommodate trench drain discharge into the pond. Map 2.05.3(3)-32 Postmining Drainage <br />Analysis Pond 013 Area has been revised to show to the location and configuration of the <br />proposed inlet. <br />Also enclosed please find a revision application and a change of index sheet to ease <br />incorporation of these materials in to the permit. If you have any questions about the enclosed <br />technical revision, please contact Tony Tennyson at (970) 824-1232 or ttennyson(&tristategt.ororg. <br />Sincerely, <br />Daniel J. C ' aro <br />Senior Manager <br />Environmental Services <br />DJC:JSS:der <br />Enclosures <br />cc: Frank Ferris (via email) <br />Chris Gilbreath (via email) <br />Jason Storey (via email) <br />Tony Tennyson (via email) <br />File: G474 -11.3(21)b-4 <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 69$ <br />A Touchstone Enetgy'Cooperative CRAIG, CO 8`1626.1307 PREWITT, NM $7045 NUCLA, CO M424.0699 <br />^, 970424.4411 505.972-5200 970.864-7316 <br />