As part of long term planning to extend the life of the mine at the Rosebery site, MMG engaged ATC Williams, to engineer a way to stop seepage into the Stitt River, increase capacity and dam safety, and extend the life of the old 2/5 tailings dam in the town of Rosebery.
The mine mainly produces lead, zinc, and copper, as well as gold and silver, and has been operating continually for 82 years.