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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 /> January 31, 2019 <br /> Mr. Brock Bowles <br /> Environmental Protection Specialist O <br /> Colorado Division of Reclamation, Mining and Safety GG S <br /> 1313 Sherman Street, Room 215 vcol <br /> Denver, CO 80203 1�Q�9 <br /> RE: New Horizon Mine (Permit No. C-1981-008) ��( <br /> Technical Revision No. 88 (TR-88) O�V�gNONNGp�10 <br /> Addition of Culvert C-180 O <br /> Dear Mr. Bowles: <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-88 proposes the addition of culvert C-180 below the existing Tailwater Ditch on the <br /> ERMR-Johnson property. Map 2.05.3(3)-1 Surface Water Hydrology has been revised to show <br /> the location and relevant information for the proposed culvert. Attachment 2.05.3(3)-36 has also <br /> been updated to include culvert C-180 design information into the SEDCAD demonstrations. <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(a)tristategt.org. <br /> Sincerely, <br /> Daniel J. Casiraro <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 EOUAL OPPORTUNITY/AFFIRMATIVE ACTION EMPLOYER CRAIG STATION ESCALANTE STATION NUCLA STATION <br /> P.O.BOX 1607 P.O.BOX 977 P.O.BOX 698 <br /> A Touchstone Energy'Cooperative CRAIG.CO 81626-1607 PREWFrr,NM 87049 NUCLA.CO 81424-OM <br /> ^� 970-04-N11 X472-5100 9704164-7316 <br />