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COLORADO <br />Division of Reclamation, <br />Mining and Safety <br />Department of Natural Resources <br />1313 Sherman Street, Room 215 <br />Deaver, CO 80203 <br />John W. Hickenlooper <br />Governor <br />Mike King <br />Executive Director <br />Ginny Brannon <br />Director <br />.. .,� .. i, <br />FROM: Clayton Wein �W <br />DATE: <br />SUBJECT: West Elk Mine 2010 -2013 AHRs <br />As requested I have reviewed the 2010, 2011, 2012, and 2013Annual Hydrology Reports (AHR) <br />for the West Elk Mine. The reports were received by the Division in a timely manner. The <br />AHRs are in compliance of the Division's Rules and Follow the parameters listed in the mine's <br />Hydrologic Monitoring Program. The details are as follows: <br />The 2010 AHR is complete. Monitoring of the surface water, spring water, well water <br />(groundwater), mine under drains, and pond water complied with Division Rules and <br />showed no exceedances in CWQCC Instream Numeric Standards. <br />The 2011 AHR is complete. Monitoring at the site was generally in compliance with <br />Division Rules and CWQCC effluent standards. There was one exceedance of the <br />CWQCC Instream Numeric Standards at Pond 014 for pH. The pH standard is set at a <br />range of 6.5 to 9.0, the sample was at 9.2. This occurred only in the second quarter of the <br />water year. <br />The 2012 AHR is complete. The monitoring at the site was generally in compliance with <br />Division Rules and CWQCC Instream Numeric Standards. There were two exceedances <br />of the CWQCC Instream Numeric Standards at Pond 007. One was for total dissolved <br />solids and the other was for fecal coliform. This occurred on July 20th, August 2" d, and <br />September 201h in 2012. The site's polishing pond was replaced by an enclosed basin <br />shortly after the exceedances were reported. <br />�yQ <br />1313 Sherman Street, Room 215, Denver, CO 80203 P 303.$66.3567 F 303.832.$106 http: / /mining.state.co.us O <br />John W . Hickenlooper, Governor I Mike King, Executive Director I Virginia Brannon, Director *� *� <br />