Roodeplaat Dam
The 495th tallest dam in the world
Roodeplaat Dam is a concrete arch dam situated in South Africa on the Pienaars River (also known along parts of its length as the Moretele River and Moreleta Spruit), a tributary of the Crocodile River, which flows northwards into the Limpopo River. The dam is a warm monomictic impoundment with stable thermal stratification during the summer.
Dam data from Wikidata (CC0) plus curated additions. Summary from Wikipedia (CC BY-SA).