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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, Colorado 80203 <br />Phone: (303) 866-3567 <br />FAX: (303) 832-8106 <br />May 6, 2010 <br />Brian A. Watterson <br />Twentymile Coal Company, LLC <br />29515 Routt County Road #27 <br />Oak Creek, CO 80467 <br />RE: Foidel Creek Mine (Permit No. C-82-056) <br />2009 Annual Hydrology Report Review <br />Dear Mr. Watterson, <br />COLORADO <br />D IV IS I ON OF <br />RECLAMATION <br />MINING <br />SAFETY <br />Bill Ritter, Jr. <br />Governor <br />James B. Martin <br />Executive Director <br />Loretta E. Pineda <br />Director <br />The Division has completed its preliminary review of the above referenced report received on 16 April <br />2010. We appreciate your submittal of this report, as the report clearly presented the hydrologic <br />monitoring data for the mine. The Division finds the 2009 Annual Hydrology Report (AHR) in <br />compliance with the requirements identified in the attached memo. Please give further attention to the <br />following items. <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 />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 />3. 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 />Please feel free to contact me with any questions at (303) 866-3567 ext 8134. <br />Sincerel , <br />ason Mu <br />Environmental Protection Specialist <br />Office of <br />Mined Land Reclamation <br />Denver • Grand Junction • Durango <br />Office of <br />Active and Inactive Mines <br />