Olympic Dam began operating its third access ramp or decline, opening up the southern mine area. The new decline, known as the Kalta decline, supports productivity and potential growth at the mine as it improves traffic flow for Olympic Dam’s underground trucking fleet.
BHP’s research and development trials into heap leaching technology were successfully completed. Heap leaching works by drip-feeding acid through a large stockpile (or heap) of ore to leach out metals. The program, which began in 2012, was conducted with the support of the South Australian Government, and confirmed the viability of the technology.