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CG <br />January 27, 2010 <br />Mr. Michael Cunningham <br />Division of Reclamation, Mining and Safety <br />1313 Sherman St., Room 215 <br />Denver, Colorado 80203 <br />RE: Varra Heintzelman Project <br />Response to Division Letter <br />DRMS File No. M-2009-018 <br />CGRS No. 1-135-10807ab <br />Dear Mr. Cunningham: <br />ENVIRONMENTAL @NEW0@00 <br />This letter addresses your comments presented in our letter of December 23, <br />2009, regarding dewatering operations at the proposed mine site referenced <br />above. <br />Item 1 - We have enclosed water level data from the Varra Del Camino <br />operations, which is located approximately 1.4 miles from the proposed <br />operation. We have also provided hydrographs which depict seasonal water <br />table fluctuations. A map depicting the well locations is provided as Attachment <br />A. Water level data collected by Varra Companies in August 2009 is depicted on <br />the map as well. <br />Item 2 - According to the well owners we understand the Haley well is <br />approximately 40 feet in depth. CGRS inspected the well on January 26, 2010 <br />and recorded the following information: <br />? Well depth - Not measured due to submersible pump obstruction; <br />? Well casing - Steel; <br />? Depth to Water - --6 feet below grade; <br />? Depth to top of submersible pump - 20 feet below grade. <br />The screened interval could not be determined. <br />Item 3 - We propose that the trigger point be a measured water level of 4 feet <br />below the predicted drawdown. This level provides accommodation for typical <br />seasonal fluctuations which has been measured to be on the order of four feet <br />(see attached hydrographs). At a point were the predicted drawdown is 6 feet if a <br />drawdown of 10 feet is measured the Division will be contacted and an <br />appropriate action plan generated based on available data. <br />P.O. Box 1489 Fort Collins, CO 80522 T 800-288-2657 <br />F 970-493-7986 www.cgrs.com