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BATTLE MOUNTAIN RESOURCES, INC. <br /> May 09, 2017 RECEIVED <br /> ✓MAY 16 2017 <br /> DI\AslON OF RECLAMATION <br /> MINING AND SAFETY <br /> Mr. Wally Erickson <br /> State of Colorado <br /> Division of Reclamation,Mining and Safety <br /> 1313 Sherman Street,Room 215 <br /> Denver,CO 80203 <br /> Re: Battle Mountain Resources Inc. <br /> San Luis Project <br /> CMLRB PermitNo.M-88-112 <br /> April 2017 Monthly Report k--" <br /> Dear Mr. Erickson: <br /> The following summarizes monitoring and site activities at the Battle Mountain Resources Inc. (BMRI), <br /> San Luis Project for the month of April 2107. <br /> Surface and ground water monitoring and analysis were completed for all required sites during the month <br /> per the terms and conditions of the TR-32 Quality Assurance and Quality Control(QA/QC)plan. <br /> Vacuum on the tailing lysimeters was verified on April 27th, no water was present for sampling and <br /> subsequent analysis. <br /> Depths to water were collected for the tailing impoundment main embankment piezometers and the West <br /> Pit monitoring wells on April 30th. The April tailing impoundment piezometer measurements identified <br /> these installations were either dry or contained less than 12 inches of water as illustrated in Table 2. <br /> Tables l and 2 below identify the depth to water measurements collected for each of the site monitoring <br /> wells,piezometers and lysimeters as required by the terms and conditions of the TR-32 QA/QC plan. <br /> The leak detection system was measured on April 301h. A total of 920 gallons of water was excavated <br /> from the leak detection system yielding a monthly average of 35.3 gpad.The tailings pond under-drain <br /> measured 39.5 gpm. <br /> During the month of April,the West Pit water treatment plant operated efficiently discharging a total of <br /> 8,831,999 gallons(27.11 acre-feet)of water to Rito Seco Creek and a total of 758,300 gallons(2.33 acre- <br /> feet)of water was transferred from the West Pit to the tailings impoundment. Seepage along Rito Seco <br /> Creek remained dry during the month. <br /> P.O.Box 310 • San Luis,Colorado 81152-0310 • (719)379-0798 • Fax(719)379-0713 <br />