HomeBiggest projectsThe Saint Brieuc offshore wind farm project timeline.

The Saint Brieuc offshore wind farm project timeline.

The Saint Brieuc offshore is a 496MW wind farm scheme being constructed at the English Channel from the coast of Saint Brieuc Bay, France. It is one of the largest commercial-scale offshore wind schemes in France. The scheme is being developed by Ailes Marines, a partnership of RES Group, Iberdrola and Caisse des Dépôts, a French public sector financial institution with an evaluated investment of $2.8bn. The wind farm is designed to produce sufficient power to meet the daily electricity needs of over 835,000 homes.

Siemens Gamesa turbines

Search for construction leads
  • Region/Country

  • Sector

A 62 Siemens Gamesa SG 8.0-167 DD offshore wind turbines will be fixed on jacket foundations in seven rows in the Saint Brieuc offshore wind farm. The rows will be 1.3km apart, while the turbines will be 1km from each other. A 225kV offshore substation will also be developed on a jacket foundation at the heart of the wind farm. Each one of the three-bladed Siemens Gamesa SG 8.0-167 direct drive turbines to be used by the offshore wind farm will contain a hub height of 207m, 81.5m-long blades, a swept area of 21,900m² and 167m-diameter rotor. Every turbine will be able to generate 8MW of electricity. The turbines will be installed with the modern High Wind Ride Through (HWRT) system, that slows down the power output rather than shutting down when wind speed exceeds 25m/s. It allows a smoother production ramp-down and more authentic power generation.

Read also: The Grand Paris Express Project Timeline and All You Need To Know.


In January, Siemens Gamesa was appointed as the turbine supplier for the Saint Brieuc offshore wind farm. The scheme’s construction was expected to start in 2019 and commissioning scheduled for 2023.


Atkins was selected as the front-end engineers and designers (FEED) and the detailed design tender for the wind turbine jacket substructures in January.

The analysis of the environmental and technical conditions was completed, this was met after installation of three wind measuring systems, in the site. The exercise spent two years recording the area’s wind power potential using the LIDAR system (Laser Imaging Detection And Ranging). Saint-Brieuc will bear Spain’s seal, because the jackets and the piles will be constructed entirely by Navantia-Windar, in Fene, of which a 1,600 tonne caterpillar crane will be deployed for the final assembly, and Avilés, respectively.

Saint Brieuc offshore wind farm is the largest offshore wind contract in the history of the shipyard at €350 m, and it will offer more than 2,000 direct jobs and thousands of indirect ones. The assembly work for the foundations commenced after the arrival of the structural tubes at the ports of Ferrol and Brest. The constituent parts final assembly will complete at the Galician shipyard facilities.

Dutch maritime services company Van Oord was to take the duty for 62 jackets and the marine substation transportation and installation. Van Oord started working on the open sea with the anchor bolts installation, for which it would launch its high seas support boat, Aeolus, specifically designed for offshore wind farms construction. It would get assistance from a second vessel from 2022. The power evacuation from the offshore wind farm will be managed by the French power transmission system operator Réseau de Transport d’Électricité (RTE). RTE is the contracting authority and scheme manager for the grid connection.
In August Van Oord’s Aeolus embarked on drilling work at the Saint-Brieuc wind farm offshore France after work was halted by the spillage of hydraulic fluid from one of the drills.
In 31 October, Ailes Marines revealed construction exercise for the first phase in the year had ended. To date, 5 wind turbine areas and electrical substation area has been drilled.

November 2021

EDS HV Group, a subsidiary of James Fisher Renewables that provides expert high voltage engineering services to the renewables industry was awarded a contract to deliver the high voltage safety management commissioning phase at Ailes Marines.

The company will be responsible for managing all the aspects of high voltage safety throughout construction of the Saint Brieuc offshore wind farm, including overseeing electrical safety for all contractors visiting the site. Reportedly, in addition to EDS’s own team, local personnel will be brought in to assist with the control function on the project.

If you have a remark or more information on this post please share with us in the comments section below


Please enter your comment!
Please enter your name here