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Peab C <br />1111 ENERGY <br />Twentymile Coal, LLC <br />REC�1VE0 <br />DEC 16 2014 <br />December 3, 2014 p,v�s�on °f F Sa etY;on. <br />Jason Musick M,16jn9 <br />Colorado Division of Reclamation, Mining, and Safety (CDRMS) <br />1313 Sherman Street, Room 215 <br />Denver, Colorado 80203 <br />(303) 866 -3567 X8134 <br />29515 Routt County Road 27 <br />Oak Creek, CO 80467 <br />970.879.3800 <br />RE: Twentymile Coal, LLC - Foidel Creek Mine, Response to CDRMS comments on 2013 <br />Annual Hydrology Report (AHR) <br />Mr. Musick: <br />Twentymile Coal, LLC (TC) is in receipt of your comment letter dated October 1, 2014. This letter <br />addresses your comments in red. <br />Item 11. Point of compliance alluvial well 008 -AT -1 was destroyed in November 2012. The 2013 TC <br />water year runs from October 1, 2012 through September 30, 2013. Thus, the well was destroyed early <br />at the start of the 2013 water year. TC utilizes a Contractor (Miller Water Monitoring Service) to <br />monitor all our alluvial wells quarterly. The Contractor neglected to inform me that the well was <br />destroyed. I did not realize this had happened until around April or May 2014, while working on the <br />2013 AHR. The well was subsequently replaced by the Contractor in the summer of 2014. Water <br />quality samples will be collected on a monthly basis for one year, instead of the permit frequency of <br />quarterly, to re- establish the database. The first three months of water quality data collected from the <br />new well has been sent to CDRMS. <br />Item 13. Please refer to Table 32 (3 pages total - attached) for surface monthly monitoring <br />frequencies. The frequency of flow measurements can very between individual months for each site, <br />and with the exception of August (for some sites) are not required weekly. I've also attached an email <br />correspondence from our consultant, Rivers Unlimited, who performs annual stream gaging for us and <br />who was tasked with monitoring new flow meters they installed on the property. In short, we had <br />significant problems with getting the new continuous flow meters to function properly. See <br />discussions on the individual sites below, and Rivers Unlimited's email. <br />• Table 34, Site 8. You indicate that flow was not measured in June, July, four weeks in August, <br />and in September. However Table 34 shows that flows were measured (via stream gaging) by <br />our consultant Rivers Unlimited, on June 17 and June 30 (meeting the once a month <br />frequency), on July 10 (meeting the once a month frequency), on August 7, and on September <br />30. We had installed a continuous flow meter station at site 8 earlier in the year. <br />Unfortunately, it malfunctioned and data was lost for August (other than the one physical <br />August measurement by Rivers Unlimited) and the beginning of September. I had summer <br />students monitoring and collecting samples for me into early September 2013, unfortunately <br />