Foundation installation at the Dieppe-Le-Tréport offshore wind project has reached the halfway point, with 31 of 62 jacket foundations now in place.
The first foundation was installed in September 2025 by DEME’s installation vessel Innovation at the project site, located 15,000 m off Le Tréport and 17,000 m off Dieppe. By February 2026, 12 jackets had been installed. Since then, another 20 foundations have been added, according to Ocean Winds, which owns the 496 MW project in a joint venture with Sumitomo Corporation and Banque des Territoires.
The jacket foundations are being supplied by a consortium of Navantia Seanergies and Windar Renovables from facilities in Spain. The four-legged jackets were manufactured at Navantia Seanergies’ yard in Fene, while the pin piles were produced by Windar Renovables in Avilés.
Navantia also built the jacket foundation for the project’s offshore substation, which was installed at the site in 2025.
The 496 MW wind farm will use 62 Siemens Gamesa 8 MW turbines. The turbines are being manufactured by Siemens Gamesa at its Le Havre facility, while installation is scheduled to be carried out by Jan de Nul Group during 2026.
