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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 />C O L O RA D O <br />D I V I S I O N o f <br />Denver, Colorado 80203 <br />RECLAMATION <br />Phone: (303) 866 -3567 <br />M I N I N G <br />FAX: (303) 832 -8106 <br />SAFETY <br />September 16, 2013 <br />John W. Hickenlooper <br />Governor <br />Mr. Jerry Nettleton <br />Moffat County Mining, LLC <br />Mike King <br />29515 Routt County Road 427 <br />Executive Director <br />Oak Creek, CO 80467 <br />Loretta E. Pineda <br />Director <br />RE: Williams Fork Mines, Permit C- 1981 -044 <br />2011 Annual Hydrology Reports <br />Dear Mr. Nettleton, <br />The Division has completed its review of the 2011 Annual Hydrology Report (AHR) received on April 6, <br />2012. The Division finds the 2011 Annual Hydrology Report is in compliance of the following Rules: <br />Rule 4.05.13(4)(a) — The data compiled in the 2011 AHR is kept and maintained at the Foidel Creek Mine <br />office. <br />Rule 4.05. I'D (4)(b) — The 2011 AHR presents the hydrologic data and analysis resulting from the <br />Williams Fork Mines for the period of January 1, 2010 through December 31, 2011 as per the Williams <br />Fork Mine Permit. <br />Rule 4.05. 13 (4)(1), (ii), (iii) — The 2011 MR identifies the water quality data obtained during the 2011 <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 />A general rise in groundwater levels due to periodic down time from malfunctions of the No. 5 mine <br />pump. The pump is anticipated to be replaced sometime in the spring of 2011. The 2011 field data for the <br />No. 5 Mine well does not suggest any significant mining related water quality impacts to the Trout Creek <br />Sandstone. The Middle Sandstone wells TR -4 and 8 1 -01 exhibited elevated conductivity values since <br />monitoring. Williams Fork has stated that they will continue to monitor these wells to find possible <br />reasons for this effect. The Mine 9 well exhibited a rise in conductivity in early 2011 and will be further <br />monitored in 2012 for trends. One levitated value was noted in July 2011 for TDS at the No. 1 Strip Pit <br />Discharge. Williams Fork states this elevated value was most likely due to earlier clearance of cat tails <br />and other vegetation from the front of the site's weir. The No. 1 Strip Pit Discharge flow ceased shortly <br />after. No significant, unpredicted, or adverse environmental impacts were noted in Williams Fork Mine's <br />2011 Annual Hydrology Reports. <br />This concludes the Division's review of the Williams Fork Mine's 2011 Annual Hydrology Report. If you <br />have any questions, please feel free to contact me with any questions. <br />Office of Office of <br />Mined Land Reclamation Denver • Grand Junction • Durango Active and Inactive Mines <br />