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Vancouver, British Columbia – Capstone Mining Corp. (“Capstone”) (TSX: CS) today announced production results for the three months ended March 31, 2017. Combined production totalled 20,900 tonnes of copper, with additional by-products of zinc, molybdenum, lead, silver and gold. Q1 2017 Copper Production (tonnes) Pinto Valley 11,300 Cozamin 4,100 Minto 5,500 Total copper production (1) 20,900 (1) Total production includes copper in concentrate and cathode production. “The first quarter was challenging at Pinto Valley,” said Darren Pylot, President and CEO of Capstone. “The heavy rain early in the year reduced the throughput capacity of the crusher and ultimately caused us to advance our decision to proceed with the primary crusher mainframe replacement. The rains also had an impact on grade, as we had to adjust our mine plan given the water in the pit.”