The WC never had any advantage of the Gariep's water flowing into the Atlantic at Alexander bay, although our  taxes helped to pay for the dams up stream, all the way into Lesotho.
It is time to consider building a tunnel from a point before Alex bay,(perhaps Sanddrif area?) along the west coast to take all the wasted water to new reservoirs or existing dams in the WC.  The diamonds found, could help to fund the project!!!