The details are still very sketchy, but:
Thebe, Shaftsinkers (I think), Transnet, EnviroServ/Interwaste (in all likelihood) a logistics solutions company, a water treatment company, a construction consortium, smaller construction companies who specialise in pipeline building and management, one of the large steel manufacturers like Trident, a silica sand or ceramic sand manufacturer, an energy consulting company, an environmental protection consulting company, and many, many more. Those are just the "macro-beneficiaries"...