The Tweefontein North development includes all five seams present in the Vryheid Formation. The 1, 2, 4 and 5 seams form part of the mineable and economic Coal Resources. The resources have the potential to be extracted via both opencast truck and shovel or dragline, and underground bord and pillar mining methods.

Tweefontein South Complex is contained in the Tavistock and Klippoortje old order mining authorisations, situated within the Witbank Coalfield. The complex development includes all five seams, however, only the 1, 2, 4 and 5 seams form part of the potentially mineable and economic Coal Resources.

Underground mining is conducted using conventional drill and blast methods (including total extraction mining, i.e. stooping), as well as fully mechanised, continuous miner equipment on a bord and pillar system.

Opencast mining is undertaken using the strip mining method with dragline. All hard overburden (shale/sandstone) and coal is blasted using bulk explosives (heavy anfo emulsion). The coal is transported by truck to the Crushing and Pillar Screening Plant. Smaller opencast areas are mined by truck and shovel techniques.

Tweefontein consists of two mining areas (Tweefontein Open cast and Tweefontein Underground) and a coal handling and preparation plant. Tweefontein produces and exports approximately 10 million tonnes per annum.