Ouvrages du Libron
The 928th tallest dam in the world
Ouvrages du Libron (English: Works of Libron) is a unique structure on the Canal du Midi. It allows the Libron River, near Agde in south-west France, to traverse the Canal du Midi. At the point of intersection, the Libron is more or less at the same level as the Canal du Midi so a traditional aqueduct was not an option. The problem was further exacerbated by the Libron's propensity to flash flood up to twenty times a year. The problem was originally solved by the building of a pontoon aqueduct known as the Libron Raft which utilised a flush-decked barge to protect the canal channel in times of flooding. However, this was replaced by the present structure in 1855.
Dam data from Wikidata (CC0) plus curated additions. Summary from Wikipedia (CC BY-SA).