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<br />61 1 Skyline Road - Laramie, WY 92070 - (307) 742-0031 <br />V V V VCENGINEERING FAX (307) 721-2913 - E-mail: intolar@wwcengineering.com <br />July 15, 2008 <br />Permit C-1980-001 <br />CDPS Permit CO-0032638 <br />Mr. Jason Musick <br />Colorado Division of Reclamation, Mining and Safety <br />1313 Sherman Street <br />Room 215 <br />Denver, Colorado 80203-2273 <br />RE: Edna Mine, June 2008 CDPS <br />Dear Mr. Musick: <br />JUL 2 2008 <br />Division of Reclamation, <br />Mining and Safety <br />Enclosed are the Edna Mine's CDPS reporting results for the above, referenced monitoring <br />period. During the month of June 2008, DMP 007 exceeded compliance criteria for the 30-Day <br />Average Effluent Flow. DMP 004, DMP 007, MON 1 and MON 2 did not exceed any <br />compliance criteria regarding effluent parameter concentrations. DMP 004 and DMP 007 passed <br />the Chronic Whole Effluent Toxicity (WET) Test for the First Biannual Event of 2008. <br />The effluent flow exceedance at DMP 007 is believed to be due to run-off from an above average <br />snowfall year resulting in large flow events. Chart 1 shows the mean Accumulated Precipitation <br />at NRCS Site 709 at Rabbit Ears for two data sets; 1987-2007 and 2008. The June 2008 <br />Accumulated Precipitation is 8.9" above or 123% of the last 20 year mean. Attachment 1 is the <br />Accumulated Precipitation raw data in tabular format at NRCS Site 709 since 1987. Also, the <br />CDPS was renewed May 14, 2007 with an effective date of July 1, 2007. Prior to this renewal <br />effluent flow was reported but did not have flow limitations. <br />Should the Colorado Division of Reclamation, Mining and Safety have any comments or <br />concerns regarding this submittal, please contact me at your convenience. <br />Sincerel <br />Beth Heesen, P.G. <br />Project Manager <br />TNS <br />File: 99-144