ASSESSMENT OF GROUNDWATER IMPACTS AT THE HISTORIC MOUNT MORGAN MINE SITE, QUEENSLAND, AUSTRALIA

The Mount Morgan Mine is a historic mine site located in Central Queensland, Australia. Between 1882 and 1981, a total of 7.6 million ounces of gold and 360,000 tonnes of copper were extracted using underground and later open mining methods. The mine closed in 1990 after the re-treatment of 28 Mt of tailings, which were placed into the open cut. Most of the mine waste is acidgenerating and acidic runoff and seepage has heavily impacted portions of the adjacent Dee River.