Arzal dam
The 928th tallest dam in the world
The Arzal dam (or Arzal-Camoël dam) is a dam on the Vilaine estuary, situated between the communes of Arzal and Camoël in Morbihan, France. Commissioned in 1970, its primary functions are to regulate the Vilaine's flow and provide drinking water to the region spanning Saint-Nazaire, Auray, and Rennes. It stands as Europe's largest estuarine dam designed to store raw potable freshwater and is one of the few such structures globally.
Dam data from Wikidata (CC0) plus curated additions. Summary from Wikipedia (CC BY-SA).