Ecological continuity of the river

The Sous-roche dam upstream from the Dragon’s bridge was installed between the two world wars on the Valserine, straddling the municipalities of Chézery-Forens and Champfromier, to use the water’s hydroelectric power. A fish pass positioned on the left embankment allows trout to cross the obstacle. However, the structure limits the circulation of sediments dragged along by the river. Under the Wild River contract, solutions are being studied to improve the transportation of sediments, which is vital for the proper operation of the river.