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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 2, 2014 <br />Sent Via U.S. Mail & Email <br />Mr. Mike Boulay JPN ��pN <br />Environmental Protection Specialist G <br />Colorado Division of Reclamation, Mining and Safety MS�pNp S� <br />Grand Junction Field Office � M \N\IN <br />101 South 3`d, Suite 301 <br />Grand Junction, CO 81501 <br />Subject: Revision to New Horizon North Mine, Permit No. C -2010 -089 <br />Dear Mr. Boulay: <br />Tri -State Generation and Transmission Association, Inc. (Tri - State) is submitting the <br />enclosed "Application Form for a Revision to a Coal Mining and Reclamation Permit" for a minor <br />revision on behalf of the Western Fuels - Colorado (WFC), A Limited Liability Company New <br />Horizon North (NHN) Mine. Tri-State is the parent of Western Fuels. The New Horizon North <br />Mine operated under Colorado Division of Reclamation, Mining and Safety (CDRMS) Permit No. <br />C -2010 -089. <br />This revision application proposes to revise Section 2.05.4(2)(e), Revegetation, Appendix <br />2.05.4(2)(e) -1, Irrigation Designs, to clarify the permit commitment that the irrigation design for <br />the irrigated pasture will be submitted prior to completion of backfilling and grading of the <br />irrigated lands. Approval of this application will clarify that backfilling of the initial boxcut pit <br />may commence prior to submittal of the irrigation design required in Section 2.05.4(2)(e). The <br />CDPHE approved Air Construction Permit 1 OM02275F, imposes limits on overburden <br />stockpiling tonnage for the NHN Mine. Consequently, backfilling of the initial boxcut pit is <br />required sooner than anticipated. WFC is requesting timely consideration of this revision to <br />Permit No. C -2010 -089, to allow the mine to maintain compliance with the CDPHE Air <br />Construction Permit. <br />This revision application also proposes to incorporate Modification #1 of Air Permit No. <br />I OM02275F from the CDPHE /APCD into Appendix 2.05.6(1) -1 of the permit. This modification <br />was approved on December 20, 2013 and supersedes any previously approved versions of the <br />permit or Compliance Orders on Consent (COOC). <br />Additionally, WFC is proposing to use a chemical stabilizer known as Envirotac II <br />supplied by Environmental Products and Applications to satisfy a control measure of the above <br />AN EQUAL OPPORTUNITY lAFFIRMATIVEACTION EMPLOYER CRAIG STATION ESCALANTE STATION NUCLA STATION <br />�/ P.O. BOX 1307 P.O. BOX 577 P.O. Sox 698 <br />A Touchstone Ener�;y'Ccxl�lerative ]i► CRAIG, CO 81626 -1307 PREWITT, NM 87045 NUCLA, CO 81424 -0698 <br />\�� 970- 824 -4411 505- 972.5200 970 - 864 -7316 <br />