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Questions Regarding the 2007, 2008 and 2009 Annual Hydrology Reports <br />1. On Page 2-2 of the Annual hydrology Report the well description for Well A-7 states that <br />sampling of the well began in the second quarter of 2009. The sampling of the well <br />started in the second quarter of 2008. Please change this date. <br />2. On Page 2-2 of the Annual hydrology Report the well description for Well A-8 states that <br />sampling of the well began in the second quarter of 2009. The sampling of the well <br />started in the second quarter of 2008. Please change this date. <br />3. On Page 2-2 of the Annual hydrology Report the well description for Well MT-95-02 <br />states that sampling of the well began in the first quarter of 2009. The sampling of the <br />well started in the first quarter of 2008. Please change this date. <br />4. On Page 2-2 of the Annual Hydrology Report the description of surface water sampling <br />location Upper West Fork of Good Spring Creek (UWFGSC) states that sampling began <br />in 2007. While the sampling did begin in the fourth quarter of 2007 the statement that it <br />started in "2007" may lead to some confusion regarding the "missing" data for the first <br />three quarters of the year. Please change this description to state that sampling of <br />UWFGSC began in the fourth quarter of 2007. <br />5. As stated in the "spoil springs" section above, numerous small spoil springs have <br />developed at the Colowyo Mine in the Streeter and Gulch A watersheds. Please add a <br />discussion of these spoil springs to the text portion of the Annual Hydrology Report <br />starting with the 2010 report. <br />6. Pursuant to Rule 4.05.13(4)(c)(iii), please provide a written interpretation of the water <br />monitoring data contained in the Annual Hydrology Report and identify the mining <br />related impacts, if any. Please discuss how this data confirms or refutes the probable <br />hydrologic impacts discussed in the permit. This written interpretation needs to begin <br />with the 2010 Annual Hydrology Report. <br />This concludes the Division's review of the Colowyo Mine's 2007, 2008 and 2009 Annual <br />Hydrology Reports. Please provide the Division with responses to the above questions no later <br />than 6 August 2010. Please call me at (303) 866-3567 X8145 if you have any questions. <br />Sincerely, <br />James R Stark <br />Environmental Protection Specialist <br />cc: Sandy Brown, CDRMS <br />Kurtis Blunt, CCC