Greenside colliery is situated 15km south-west of Witbank in Mpumalanga and forms part of the South African Coal Estates Complex (SACE), which includes Landau and Kleinkopje collieries. The mine was established to supply coal to overseas markets through the Richards Bay Coal Terminal, as well as a small quantity of coal for domestic use. Its total output is 4. 4 million run of mine tonnes a year which equates to 3. 1 million saleable tonnes of coal. It has four underground continuous miner sections.