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The groundwater table elevations and potentiometric surface maps, developed by Advanced <br /> Environmental Sciences, Inc., confirm the groundwater flow gradient was from the Rito Seco <br /> alluvium to the West Pit backfill during 2016. BMRI also performed monthly visual <br /> inspections for seepage in the historic seepage area along the Rito Seco Creek. No seeps <br /> were observed in the historic seepage area during 2016. <br /> Additionally, the two groundwater capture wells (M-32 and M-33), were operated in <br /> conjunction with groundwater table elevation control in the West Pit during the 2016 <br /> calendar year. Groundwater elevations were maintained equal to or lower than 8,540 feet <br /> amsl in wells M-32 and M-33 as required. Groundwater pumped from these wells was <br /> either treated at the West Pit Water Treatment Plant and discharged to the Rito Seco under <br /> the BMRI discharge permit, or pumped to the LTF for management. In 2016, the West Pit <br /> water treatment plant treated and discharged a total of 95,951,700 gallons of water to the Rito <br /> Seco Creek. Additionally, a total of 7,538,000 gallons of water was transferred from the <br /> West Pit to the LTF. <br /> There were no new Technical Revision(s) submitted for the 2016 calendar year. <br /> Should additional information be required or if any clarifications are necessary, please <br /> contact me at(719) 379-0538. <br /> �Y�s <br /> Julio Madrid <br /> Sr. Supervisor Legacy Sites Closure and Reclamation <br /> Cc: Lawrence Fiske,BMRI(electronic) <br /> Tim Runnells, AESI <br /> BMRI File <br /> Enclosures: <br /> Appendix A <br /> Appendix B <br /> Annual Fee and Report Request <br /> Annual Report form <br /> Site Map <br /> Check for Annual fee ($1,150) <br /> Annual Report and Fee-2016 5 AES,Inc. <br /> Battle Mountain Resources-San Luis, CO March 2017 <br />