High-performance hydraulic structures
We have decades of experience of designing and delivering dams, locks and canals to regulate and store water, transforming it into a valuable resource.

Locks, canals and dams

High-performance hydraulic structures
We have decades of experience of designing and delivering dams, locks and canals to regulate and store water, transforming it into a valuable resource.

Sustainable hydraulic infrastructure
Our infrastructure is designed to integrate sustainably into the regions in which it is located, while preserving natural balances.

Technical and environmental studies
Our projects incorporate hydraulic, mechanical and environmental constraints from the earliest stages.
The Mont Saint-Michel dam in France illustrates this exacting approach, with a design that preserves the site’s maritime character and surrounding ecosystems.

Precision and expertise
Building dams, locks and canals requires careful control of construction tolerances and close coordination between gates, mechanical systems and civil engineering.
The Chatou dam, downstream from Paris, consists of sluiceways fitted with flap gates and was built in multiple phases behind cofferdams to ensure unimpeded water flow.

Renovating and securing infrastructure
We carry out work to modernise strategic infrastructure.
The lock at Don, on the River Loire, is an excellent example. Its renovation involved adapting the structure to cope with increased river traffic and strengthened safety for users, while keeping the lock fully operational throughout the works.

Ensuring continuity of service
Our phased construction methods allow river traffic to continue and keep water flowing normally during works, even in periods of high water.
The renovation and extension of the locks at Méricourt, in the Paris region, illustrates this approach: the works were carried out alongside the existing structures while keeping navigation on the Seine uninterrupted.
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We design and construct customised hydraulic structures:
Our teams meet both technical and environmental challenges through a combination of civil, mechanical and hydraulic engineering. One of our key differentiators is our ability to ensure close synergy between expert teams who are accustomed to working together.

River works are also subject to specific environmental constraints.
The impact of constructing and operating hydraulic structures on water flows is considered from the earliest design stage, to avoid harming river biodiversity and to protect natural ecosystems.
Fish passages, sediment management and careful phasing of works are all integrated into our projects, maintaining efficient water flow while respecting natural habitats.


Reconstruction of a major barrage on the Seine featuring movable flap gates and a fishway to ensure ecological continuity.

Complete renovation to support the growth in river traffic between Dunkirk and Lille.

Renovation and extension of locks, carried out while maintaining navigation and modernising equipment to accommodate large convoys.

New dam on the Couesnon to restore the maritime character of the site and combat silting.