The first jacket foundation has been installed at the 496MW Dieppe Le Tréport offshore wind farm in France, marking a milestone for Ocean Winds.
Located 17km off the coast of Dieppe and 15.5km from Le Tréport, the offshore wind farm will consist of 62 turbines, providing renewable electricity equivalent to the consumption of nearly 850,000 people.
The wind farm’s offshore substation was installed earlier this summer.
The foundations are steel jackets fabricated in Spain. The jackets are then transported from Cherbourg’s port to the offshore site by Innovation (pictured), an installation vessel operated by Deme.
Measuring between 48 and 55 metres high depending on water depth, the jacket foundations are anchored into pre-installed steel piles with diameters of 2.5 metres and lengths of up to 63 metres.
The installation of the first jacket at the Dieppe Le Tréport project (EMDT) is a new milestone in France for Ocean Winds, the offshore energy company created by EDP Renewables and Engie.
Other recent achievements include the installation of more than half the turbines at its Yeu-Noirmoutier (EMYN) project, and the offshore installation of the three floating turbines at the Eoliennes Flottantes du Golfe du Lion (EFGL) project.
Ocean Winds country manager for France Marc Hirt said: “Ocean Winds has been firmly committed to the French offshore wind market for more than a decade, with projects across all of France’s maritime façades and using every technology, from monopiles to jackets for bottom-fixed to floating.
“With Dieppe Le Tréport, we are continuing this journey, adding another major step to our French industrial footprint.
“Summer 2025 has been quite busy for us with EMYN already producing our first French offshore wind electrons and more than 1GW under simultaneous construction in the country.
“Beginning September with the installation of this foundation at EMDT is another tangible sign of our contribution to the national ambition for energy transition.”
Project director Frédéric Flaus added: “The successful installation of this first foundation marks the start of a new chapter in the construction of the Dieppe Le Tréport wind farm.
“It is the result of close collaboration between our teams and our industrial partners, drawing on years of expertise and preparation.
“We are now looking forward to the safe and successful installation of all 62 foundations, that will continue in successive campaigns through to 2026.”