The Mine Waste Solutions (MWS) project is located near Stilfontein, South Africa within the Witwatersrand Basin. MWS is a gold and uranium tailings reprocessing operation that processes slurry material, reclaimed hydraulically from various tailings storage facilities through three processing plants. The gold plants have the capacity to treat approximately 26 Mt per annum and the uranium plant has a design capacity of 1.2 Mt per year.
The gold and uranium in the tailings dams at MWS were originally associated with the conglomerate reefs that were mined at the now closed Stilfontein and Buffelsfontein gold mines. The facilities also include a modern tailings storage facility approximately 15 km from the gold plant modules where residues from the treatment plants are deposited.
Sandstorm has a 1% net smelter returns royalty on MWS. The royalty was previously owned by Premier Royalty Inc., a company that Sandstorm acquired in October 2013.