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Interf.f.i. e Memorandum <br />.................................................................................................................................................................. <br />April 14, 2016 <br />From: Leigh Simmons <br />.. Wa <br />To: Rob Zuberi .� <br />Subject: Southfield Mine (Permit No. C-1981-014) <br />2015 AHR review <br />You requested that I review the 2015 Annual Hydrology Report for the Southfield Mine: <br />Compliance with the Surface Water Monitoring Plan <br />The five monitoring sites on Newlin, Magpie, and Second Alkali Creeks were monitored once in <br />the second quarter of 2015 (on May 6, May 7 and April 28, respectively). Flow was recorded at <br />all of the sites, and water quality samples were taken. The suite of water quality parameters <br />that samples were analyzed for was consistent with the list of suggested parameters in Exhibit <br />25, which was approved in June 2003 with MR -50. No monitoring was conducted in the fourth <br />quarter of 2015, however the water monitoring program was terminated with the issuance of <br />Technical Revision 43 (TR -43) in October 2015. <br />Ponds 4 and 5 treat storm water at the main mine site, and have CDPS 002 and 004 discharge <br />points associated with them respectively (permit number COG850045). Neither pond discharged <br />during the reporting year. <br />Ponds L-1 and L-2 treat storm water at the loadout, and have CDPS 001 and 002 discharge points <br />associated with them respectively (permit number COG850006. Neither pond discharged during <br />the reporting year. Reclamation of both of these ponds began in October and was completed in <br />late November, 2014. <br />Compliance with the Groundwater Monitoring Plan <br />The four groundwater monitoring points were monitored once in the second quarter of 2015. <br />MW -NW was reported as dry on May 27; the depth to water was recorded at MW -16 on June 6, <br />and at MW -23 and MW -65 on May 27, and water quality samples were taken and analyzed. As <br />discussed above, no monitoring was conducted in the fourth quarter of 2015. <br />`t. <br />1313 Sherman Street, Room 215, Denver, CO 80203 P 303.866.3567 F 303.832.8106 http://mining.state.co.us " <br />John W. Hickenlooper, Governor I Mike King, Executive Director I Virginia Brannon, Director' ` ri <br />