DEME Offshore has secured three different contracts for the Dieppe Le Tréport offshore wind farm in France, its third major contract in the country with a total value of over €300 million. The company has previously secured contracts for Saint-Nazaire and Iles d’Yeu and Noirmoutier wind farm.

DEME has been contracted to provide the transport and installation of the pin piles and jackets forming the foundations for the turbines, as well as the transport and installation of the pin piles, the jacket and the topside for the offshore substation. DEME Offshore will also carry out the EPCI scope (Engineering, Procurement, Construction and Installation) for 120 km of inter-array cables.

The Dieppe Le Tréport wind farm is owned by a consortium made up of Ocean Winds (Engie-EDPR), Sumitomo Corporation and Banque des Territoires. DEME Offshore was chosen for its proven track record installing this type of jacket foundations, its cable laying expertise, and extensive experience of working on offshore wind farms with challenging site conditions.

Applying the Moray East experience

Dieppe Le Tréport has similarities to the 950 MW Moray East offshore wind farm in Scotland, where DEME Offshore performed the full EPCI scope for 100 foundations and three offshore substations for Ocean Winds. DEME Offshore developed its own techniques for this project, and these will also be deployed at Dieppe Le Tréport, including a specialised rig and a jacket levelling and fixation system.

Piling operations for the offshore substation foundation are set to start in 2024 and the jacket foundation installation in the following year. One of DEME’s cable installation vessels is set to perform the cable laying scope, following the installation of the substation.

DEME Offshore is building up an impressive track record in France. Dieppe Le Tréport follows the successful installation of the XXL monopile foundations at Saint-Nazaire and the contract award for the installation of monopile foundations and the substation for the Iles d’Yeu and Noirmoutier offshore wind farm projects. DEME Offshore has also successfully completed the transport and installation of the offshore substations of Saint-Nazaire, Fécamp and Calvados.

With 62 turbines located off Dieppe and Le Tréport, the wind farm is set to supply nearly 850,000 people with sustainable electricity.