The lock steps are some of the most magnificent of their kind in France.

The two series of each of the three locks cover a distance of 289m and a gradual depth of 22m and are separated by magnificent crossing tanks. Neither of the lock houses has undergone the slightest alteration since being built.

A dry dock, situated above the last lock, provided the only place where the flat bottom of a gabare could be repaired independently of tidal rhythms.

A ‘discovery’ footpath ensures that the whole site can be explored at leisure. It includes :
• The lock steps.
• The dry dock.
• The hydroelectric plant.
• The dam crossing.
• The fish lift built in 1989 and equipped with an observation window.

The fish ladder is freely accessible by a footbridge 24/24 and 7/7.