Tillegra Dam proposal
The 928th tallest dam in the world
Tillegra Dam was a proposed dam on the Williams River to be located 20 km (12 mi) northwest of Dungog, in the Hunter Region of New South Wales, Australia. It was first proposed in the 1970s but a formal proposal was not announced until 2006. Community opposition and changing needs saw the end of the proposal in November 2010. Hunter Water divested itself of its Tillegra landholding in 2015, permanently ending the proposal.
Dam data from Wikidata (CC0) plus curated additions. Summary from Wikipedia (CC BY-SA).