The Tunnel de Savoyeux is an underground canal that diverts the Saône between two of its meanders near Savoyeux, in Haute-Saône, France. It was completed in 1843 and made it possible to sail the small Saône to the Saône. It is 642.5 meters long and 6.55 meters wide. It has no path for pulling the boats, so the skippers had to pull the boats with chains attached to the walls of the tunnel. It also has a lock at the end of the tunnel
The Savoyeux tunnel was built during the July Monarchy, in 1837. It facilitates navigation on the Saône. The dimensions of the work are impressive: 642.5 meters long, and only 6.55 meters wide. It passes under the hill and makes it possible to cut a meander in the river, and to avoid a dam located a little higher up.