Île de la Dérivation

The île de la Dérivation is an island in the Seine between Carrières-sous-Poissy and Poissy with an elongated shape and roughly one hundred meter width. It developed from a 19th-century canal construction project and is now primarily defined by residential buildings.

The island formed in the 1880s during construction of a diversion canal for river traffic. A private owner acquired it shortly afterward and shaped its development over the following decades.

The island was once a key point for river navigation on the Seine before becoming a residential area. Today visitors can see traces of structures that reflect this earlier purpose.

The island is only accessible on foot or by bicycle via a footbridge from the right bank. Visitors should expect limited access and check in advance about any restrictions.

The island was long isolated by a lock system that controlled river traffic. This system was later abandoned, fundamentally changing how the site was used and understood.

Location: Carrières-sous-Poissy

GPS coordinates: 48.95550,2.04731

Latest update: December 13, 2025 17:04