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III IIIIIIIIIIIII III <br />DIVISION OF MINERALS AND GEOLOGY <br />Depanmem of Natural Resources <br />1313 Sherman St., Room 2I5 <br />Denver, Colorado 80203 <br />Phone: p03) 866-7567 <br />FAX: 13031 832-8106 <br />~~~ <br />DEPARTMENT OF <br />NATURAL <br />RESOURCES <br />July 18, 1996 Roy Romer <br />Governor <br />lames 5. La'hhead <br />Mr. Jon Kubic Executive Director <br />Michael B. Long <br />Department of Public Health and Environment Division Director <br />Water Quality Control Division <br />4300 Cherry Creek Drive South <br />Denver, CO. 80222-1530 <br />ItE: New mine water discharge, Foidel Creek Mine, #C-82-056 <br />Dear Mr. Kubic: <br />After review of the public notice and the draft copy of permit CO-0027154 for Cyprus <br />Yampa Valley Coal Corporation (CYCC), I have the following questions or comments. <br />1. In the currently approved discharge permit, three sediment pond outfalls (001, 005 <br />and 007) are included in a mass balance equation to calculate flow and manganese <br />concentrations (outfall 019). Why is the new outfall (020) not included in this <br />calculation? Presently, water which would pass through one of the three listed <br />outfalls is piped underground and utilized for dust suppression, and would eventually <br />have to pass through outfall 020 of the Eastern Mining District. It would seem <br />appropriate that this new outfall would be included in this calculation. <br />2. For the record, the public notice lists the mine for which this new permitting change <br />is necessary as Mine 1, Mine 2, and Eckman Park (CYCC complex). Although, from <br />a CDPS permitting standpoint it may not matter, it is somewhat confusing and mis- <br />leading from a mining perspective. The Foidel Creek mine is the underground mine <br />which requires this new outfall, to dewater underground workings in the Eastern <br />Mining District of Twentymile Park. The CYCC complex of mines were surface strip <br />operations, are now entirely reclaimed, and are very much separate from any <br />underground mine dewatering or need for same. Presenting to the public that these <br />mines are in need of a new dewatering outfall in not accurate. As we discussed, due <br />to the handling of water at the Foidel Creek mine and the number of different <br />permits and outfalls, it may be appropriate to review the permitting and <br />corresponding effluent limitations. Twentymile Coal may be interested in ini[lating <br />this review, as they have concerns about the limitations currently set at some outfalls, <br />STATE OF COLORADO <br />