Weir separating Sterkfontein and Driekloof Dam in the Free State, South Africa. When the Driekloof Dam is at capacity, its water can augment that of the Sterkfontein Dam, which in turn can release water into the Vaal Dam, via the Nuwejaar Spruit and Wilge River.
Rute Martins of Leoa's Photography (<a rel="nofollow" class="external text" href="http://www.leoa.co.za">www.leoa.co.za</a>)
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>