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TRI-STATE _GENERATION AND TRANSMISSION ASSOCIATION, INC. <br />v - HEADQUARTERS: ' P.O. BOX 33695 DENVER, COLORADO 80233-0695 _ 303-452-61-11 <br />May 19, 2017 <br />Mr. Brock Bowles <br />Environmental Protection Specialist <br />Colorado Division of Reclamation, Mining and Safety RECEIVED <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 MAY 2 1 2017 <br />RE: New Horizon Mine (Permit No. C-1981-008) Division of Reclamation, <br />MR -104 Adequacy Review Response Mining & Safety <br />Dear Mr. Bowles: <br />Tri-State Generation and Transmission Association (Tri-State) has received your <br />adequacy review letter for MR -104, May 17, 2017 and provides the following responses to your <br />comments on behalf of the Elk Ridge Mining and Reclamation's New Horizon Mine. <br />1) On page 3, bullet point e lists the ditches and culverts that have been permitted as <br />permanent. This list has not been updated to include the changes associated with recent bond <br />releases and revisions to the permit. Please update this list and Map 2.05.3(3)-1 Surface <br />Water Hydrology so they are consistent with each other. <br />Response: Map 2.05.3(3)-1 has been updated to show ditches and culverts as temporary or <br />permanent structures and to remove culverts no longer within the permit boundary as a result <br />of Phase III bond release. Page 3 of Section 2.05.3(3) has been updated to reference Map <br />2.05.3(3)-1, which has been updated to show ditches and culverts as temporary or permanent. <br />Also included with this adequacy response package are materials revised in response to your <br />adequacy comments and a change of index sheet to ease incorporation of this material into the <br />permit document. If you have any questions regarding the enclosed adequacy review responses, <br />please contact Tony Tennyson at (970) 824-1232 or ttennvsonla%tristate;jt.oi* . <br />DJC:JS: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-5 <br />A Touchstone Energy Cooperative ` <br />Sincerely, <br />Daniel J. Ca ' aro <br />Senior Manager <br />Environmental Services <br />CRAIG STATION ESCALANTE STATION NUCLA STATION <br />P.O. BOX 1307 P.O. BOX 577 P.O. BOX 698 <br />CRAIG, CO 81626-1307 PREWITT, NM 87045 NUCLA, CO 81424-0698 <br />970-824-4411 505-876-2271 970-864-7316 <br />