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STATE OF COLORADO <br /> <br /> <br />DIVISION OF RECLAMATION, MINING AND SAFETY <br />Department of Natural Resources <br /> <br />1313 Sherman St., Room 215 <br />Denver, Colorado 80203 <br />Phone: (303) 866-3567 <br />FAX: (303) 832-8106 <br /> <br />July 19, 2013 <br />John W. Hickenlooper <br /> <br />Governor <br />Mr. Jerry Nettleton <br /> <br />Mike King <br />Moffat County Mining, LLC <br />Executive Director <br />29515 Routt County Road #27 <br /> <br />Loretta E. Pineda <br />Oak Creek, CO 80467 <br />Director <br /> <br />RE: Williams Fork Mines, Permit C-1981-044 <br /> 2012 Annual Hydrology Reports <br /> <br />Dear Mr. Nettleton, <br /> <br />The Division has completed its review of the 2012 Annual Hydrology Report (AHR) received on June 4, <br />2013. The Division finds the 2012 Annual Hydrology Report is in compliance of the following Rules: <br /> <br />Rule 4.05.13(4)(a) – The data compiled in the 2012 AHR is kept and maintained at the Foidel Creek Mine <br />office. <br /> <br />Rule 4.05.13(4)(b) – The 2012 AHR presents the hydrologic data and analysis resulting from the <br />Williams Fork Mines for the period of January 1, 2011 through December 31, 2012 as per the Williams <br />Fork Mine Permit. <br /> <br />Rule 4.05.13(4)(i), (ii), (iii) – The 2012 AHR identifies the water quality data obtained during the 2012 <br />water year (January 1, through December 31). This includes data from each monitoring site. The AHR <br />included interpretation of the data and related impacts of the hydrologic balance. <br /> <br />Increase in conductivity was noted with wells TR-4, 81-01, 9 Mine and 259. Moffat County Mining, LLC <br />has stated it will continue monitoring these sites for more information on the conductivity trend being <br />observed. The Williams Fork Mines had one iron exceedance in the year of 2012. The exceedance was <br />documented in the fourth quarter discharge monitoring report. This iron exceedance is sporadic and is <br />observed to occur during very low flow time periods. The anomaly in total dissolved solids (TDS) <br />observed in 2008 has not occurred since. TDS values for the year 2012 are within the normal historical <br />average. No significant, unpredicted, or adverse environmental impacts were noted in Williams Fork <br />Mine’s 2012 Annual Hydrology Reports. <br /> <br />This concludes the Division’s review of the Williams Fork Mine’s 2012 Annual Hydrology Report. If you <br />have any questions, please feel free to contact me with any questions. <br /> <br />Sincerely, <br /> <br />Zach Trujillo <br />Environmental Protection Specialist <br />(303) 866-3567 ext. 8164 <br />Zach.Trujillo@state.co.us <br />Office of Office of <br /> <br />Mined Land Reclamation Denver • Grand Junction • Durango Active and Inactive Mines <br />