Nindooinbah Dam
The 928th tallest dam in the world
The Nindooinbah Dam is a decommissioned earth-fill embankment dam with an un-gated spillway located off-stream in Beaudesert in the South East region of Queensland, Australia. The dam was completed in 1951 and the resultant reservoir is called Lake Nindooinbah. It was used for potable water supply until 1 March 2014 when it was decommissioned, and it has been used for recreational purposes since 2014.
Dam data from Wikidata (CC0) plus curated additions. Summary from Wikipedia (CC BY-SA).