To meet regulatory requirements and ensure the dam's safety against floods, the evacuation capacity was increased from 10 m³/s to 56 m³/s.

First step, raising the walls of the existing spillway by nearly 45 meters.
An operation that combined traditional reinforced concrete and prefabricated walls, up to 4 meters high, increasing containment capacity.

Second step, construction of a new 155-meter reinforced concrete spillway, providing most of the capacity gain.
Its completion required more than 6,500 m³ of earthworks, the implementation of 900 m³ of structural concrete, and the shaping of 86 tons of steel.

The project was characterized by high technicality, notably the management of an average slope of 8%, the realization of complex formwork for a curved layout, and the construction of inclined walls to maximize the sealing of embankments during the compaction phase.

Congratulations to our teams for this technical project!

Client and Project Management: Société du Canal de Provence - SCP
Consortium: Eiffage Génie Civil – Forézienne

Credit: Eiffage