Codelco to kick off Chuquicamata underground by mid-year

Chile’s Codelco, the world’s No. 1 copper producer, plans to kick off underground operations at its century-old Chquicamata mine by mid-year, chairman Juan Benavides said Wednesday. The $5.6 billion-switch, part of Codelco’s 10-year, $39 billion-overhaul of its core mines, is expected to...