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STATE OF COLORADO <br />DIVISION OF RECLAMATION, MINING AND SAFETY <br />Department of Natural Resources <br />1313 Sherman St., Room 215 <br />Denver <br />Colorado 80203 C O L O R A D O <br />, <br />Phone: (303) 866-3567 D I V I S I O N o f <br />RECLAMATION <br />FAX: (303) 832-8106 MINING <br /> - St. - <br />July 20, 2010 SAFETY <br /> <br />Brian A. Watterson Bill Ritter, Jr. <br />Governor <br />Twentymile Coal Company, LLC <br /> Mike King <br />29515 Routt County Road #27 Executive Director <br />Oak Creek, CO 80467 Loretta E. Pineda <br /> Director <br />RE: Foidel Creek Mine (Permit No. C-82-056) <br />2009 Annual Hydrology Report Review Responses <br />Dear Mr. Watterson, <br />The Division has completed its review of Twentymile Coal Company's responses to the Divisions <br />initial review in a letter dated 6 May 2010 for the above referenced report received on 16 April 2010. <br />We appreciate your submittal of responses to the Division's review identified below. <br />1. Page 2, paragraph 3 indicates that from May through the first two weeks of September 2009, <br />some of the electro-coagulation treated water was discharged (Site 115) to Fish Creek. <br />However, on page 15, Sec. 3.7 paragraph 3, it is noted that Site 115 discharged approximately <br />from May to early August. <br />Please indicate if the Site 115 discharge dates are correct and if the dates of discharge include <br />the electro-coagulation treated water. <br />ITEM RESOL VED <br />2. Page 11, paragraph 7, Please submit a revised page 11 showing the correct Table numbers and <br />figure numbers for Sites SW-13, SW-14, and SW-15 and the correct units for iron <br />concentrations. <br />ITEM RESOLVED <br />List of Tables, the 2009 Annual Hydrology Report indicates that subset tables are provided for <br />Summary's of Water Quality Data (2a through 59a) these were not provided in the list of <br />tables. Please provide these tables to reflect references made throughout the report. <br />ITEM RESOLVED <br />Please feel free to contact me with any questions at (303) 866-3567 ext 8134. <br />Sincerely, <br />ason sic <br />Enviro ntal Protection Specialist <br />Office of Office of <br />Mined Land Reclamation Denver • Grand Junction 9 Durango Active and Inactive Mines