The Application of Rcc in South Africa

After some initial trials with RCC the first 3 RCC dams were constructed almost simultaneously. The Zaaihoek Dam and De Mistkraal Weir were designed and constructed by DWAF while the Arabie Dam, now called Flag Boshielo Dam, was designed by a consultant and constructed by a contractor for the then Leboa Homeland Government. The latter, a composite dam with a concrete spillway and an embankment left flank, was mainly designed in accordance with USA practices of the time. The design of the two DWAF dams was, however, based on DWAF research and design ideas. There were also other differences. The Zaaihoek and De Mistkraal dams were provided with stepped spillways while the Flag Boshielo Dam had a smooth spillway.