East Rand Mine
East Rand Proprietary Mines is a 125-year-old underground gold mining operation on the Witwatersrand Basin at Boksburg, to the east of Johannesburg. The mine employed 3,850 people. It was the deepest mine in the world until 2008 at 3,585 metres, slightly more than the TauTona mine, also in South Africa, which was 3,581 metres at the time
The mine closed in 2008. Historical gold production between 1896 and 2008 was recovered gold grade of 8.1g/t.
High grade gold deposits remain with existing in situ resources of, including;
- Measured & Indicated resource of at 6.7g/t.
- Inferred resources of at 4.92 g/t.
The Cason mine dump was once the world's highest man made hills. This dump is currently being recycled. It is now a shadow of its former self and will probably disappear in the future.
Production
Recent production figures:| Year | Production | Cost per ounce |
| 2007 | 80,216 ounces | US $641 |
| 2008 | 79,479 ounces | US $748 |
History
The ERPM engineered many mining techniques which are still in place today, including "Long Wall Mining". The mine also built the world's largest ice factory which produced up to 8,000 t of ice daily to cool wall rock temperatures of 50-60 degrees Celsius.The mine was acquired by private Malaysian mining company OroTree on 26 February 2019.