Whenever the level of the Vaal Dam falls below 18%, the Department of Water and Sanitation (DWS) opens the sluice gates of Sterkfontein Dam near Harrismith. Water cascades into the Nuwejaarspruit, ...
It is well known that Johannesburg receives most of its potable water from the Lesotho Highlands Water Project via the Vaal Dam, but there is another equally voluminous inter-basin water transfer ...
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