Abstract: Journal of Environmental Science, Sustainability, and Green Innovation

Abstract: 
Tharisa Minerals is a chrome and platinum group metals (PGM) open-pit mine near Rustenburg, South Africa. The mine dewaters three pits and a planned underground mine. Historic workings under the mine’s active East pit also require proactive water management to ensure safe mining operations. Tharisa’s dewatering strategy integrates stormwater control, in-pit pumping (boreholes and sumps), and pit perimeter dewatering boreholes. Automated monitoring of water levels records success in meeting drawdown targets. Water re-use enables a phased approach to zero discharge. Tharisa is a good example of pro-active dewatering design. There are valuable insights on de- watering for surface and underground transition mines.