Ouvrages du Libron (English: Works of Libron) is a structure like no other on the Canal du Midi. It allows the canal to traverse the Libron River near Agde in south-west France. At the point of intersection, the Libron is at sea-level and the Canal du Midi is slightly below 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.