Our Leonora Operations
Our Leonora Operations in Western Australia consists of the Gwalia underground mine and 1.2 Mtpa processing plant, as well as nearby development opportunities. The operation is developing an ore body that has already produced four million ounces from open cut and underground operations.
Gwalia underground mine
Gwalia mine is the cornerstone of our Leonora Operations. It is located 235 kilometres from Kalgoorlie in Western Australia and has been owned by St Barbara since 2005. During this time, it has produced more than 2.5 million ounces of gold
At over 1,600 metres below surface, Gwalia mine is the deepest underground trucking mine in Australia and has been operating for more than 100 years. It was originally established in 1896 as the Sons of Gwalia mine. Herbert Hoover was the first mine manager and went on to become the 31st President of the United States.
For full details of Gwalia mine’s ore reserves and mineral resources, refer to our compliance documents at stbarbara.com.au/exploration/
The processing plant is a conventional Carbon in Leach (CIL) circuit and has a nominal capacity of 1.2 million tonnes per year of hard rock and up to 1.4 million tonnes per year when softer material is blended. Other surface infrastructure includes a gas-fired power state, a paste fill plant and a refrigeration plant to cool the underground environment.
The accommodation village was significantly upgraded in 2008, incorporating a number of energy-efficient and environmentally friendly initiatives. The village has since been acknowledged with a number of environmental awards for both energy and water savings.