Chatou Barrage
Chatou Barrage
Key facts
Location
France, ChatouDelivery
december 2013
Client
Voies Navigables de France
Contractors
Bouygues Travaux Publics - Bouygues Travaux Publics Régions France
Reconstruction of a barrage on the Seine
Firmly established on one of France’s most important river routes for the transport of goods, between the ports of Le Havre, Rouen and Paris, the Chatou barrage replaces its predecessor, which had been located 50 metres downstream since 1933. Its construction was one of the largest operations ever undertaken by Voies navigables de France (the French Waterways Authority) and was entrusted to a consortium of companies led by Bouygues Travaux Publics.
Key figures
- 107,5
- meters from the dam outlet
- 3
- flap gates
- 1
- fishway
Performance and ecological continuity
The 107.5-metre-wide structure comprises three 30.5-metre-wide sluices, each fitted with movable flap gates operated by hydraulic cylinders. It is equipped with a fishway, allowing fish to swim up the Seine without being blocked by the new barrage. Its construction took place in three distinct phases, each protected by a cofferdam made of sheet piles driven into chalk.
The phasing of the works was crucial to ensure hydraulic transparency during flood periods, from the end of November to the beginning of April. The rest of the time, only one of the three sluices was immobilised by the works.
Gallery
Our projects
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Reconstruction of a major barrage on the Seine featuring movable flap gates and a fishway to ensure ecological continuity.
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