Located in Queensland, Australia, Ernest Henry Mining is a Glencore company that first began operating in 1998 as an open pit mine. As the open pit’s economic life span was due to end in 2011, plans in 2009 were confirmed to invest $589 million and transform the mine to underground shaft mining. By early 2012, a 5 km decline had been established to enable the trucking of ore from underground to the surface. Rates of production with this method were approximately three million tonnes annually resulting in about 25,000 tonnes of copper concentrate and 35,000 ounces of gold concentrate per year. By moving to shaft hoisting, 2015 production was forecast to double to six million tonnes of ore. That rate is projected to be achieved on an annual basis over the extended lifespan of the mine to 2026.
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