Clarendon Weir
The 928th tallest dam in the world
The Clarendon Weir is a concrete gravity weir across the Onkaparinga River, located in the suburb of Clarendon, approximately 20 kilometres (12 mi) south of the Adelaide city centre, in South Australia.
Dam data from Wikidata (CC0) plus curated additions. Summary from Wikipedia (CC BY-SA).