The major smelter maintenance upgrade in August 2017 was the largest planned shutdown ever undertaken at Olympic Dam and ran for more than 100 days. Other major upgrade work was carried out on the refinery, concentrator and site technology to ensure the ongoing reliability and safety of the Olympic Dam operation.
Guidance for Olympic Dam was reduced to approximately 135 kilotonnes (kt) following a slower than planned ramp-up after completion of the major smelter maintenance campaign.
However, Olympic Dam slightly exceeded the revised guidance for the full FY2018 at 137 kt.
First ore from the higher-grade Southern Mine Area was extracted in early FY2018 with development continuing.