Beginning of the installation of the foundations of the jacket on the site of the Saint-Brieuc offshore project

Installation of jacket foundations at the Saint-Brieuc offshore wind farm project site in France has begun.

Five ships have already been mobilized for this work. Seven Borealis will be used for the lifting and installation of the foundation, and North Sea Giant for the waterproofing. Three tugs, namely Kamarina, Eraclea and Onyx, as well as two barges (Sarens Caroline and H401) were deployed for the transport operations. The vessels are operated from the maritime coordination center located in Pleudaniel, Côtes d’Armor.

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The Saint-Brieuc offshore wind farm project will be the second of its kind in the country and the first to use jacket foundations. It will have a total of 62 jackets that will support Siemens Gamesa 8 MW turbines. The foundations are delivered by Navantia and Windar, who shipped the first batch in early June.

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The implementation of the Saint-Brieuc offshore wind farm project must be environmentally sustainable

It would appear that the trellis structures of the foundations of the jacket have a limited impact on the environment. They will facilitate the circulation of water masses and biodiversity. They will also promote the artificial reef effect according to developer Ailes Marines. The latter is a 100% subsidiary of Iberdrola. It indicated that it was continuing safety measures and environmental monitoring during this phase of the work.

An anti-pollution system will be consolidated during the construction phase of the wind farm. These include new protocols, response means and equipment. A partnership with the Documentation Center for Research and Experimentation on Accidental Water Pollution (CEDRE) has made this possible. According to Ailes Marines, the anti-pollution system was tested during full-scale sea trials in early 2022. The CEPPOL (Center of Practical Expertise in Depollution) and CEDRE witnessed the tests.

In addition, during this phase of the work, two surveillance and information vessels will be permanently on site. In addition, environmental monitoring measures in various fields including turbidity, fishing, marine mammals, birds, acoustics, etc. will continue during all the implementation phases of the major components of the wind farm.

The Saint Brieuc offshore wind farm project in brief

Saint Brieuc offshore is a 496 MW wind farm being built in the English Channel from the coast of the bay of Saint Brieuc, France. It is one of the largest commercial-scale offshore wind projects in France.

The program is developed by Ailes Marines, a partnership between RES Group, Iberdrola and Caisse des Dépôts, a French public sector financial institution with an investment valued at $2.8 billion. The wind farm is designed to produce enough energy to meet the daily electricity needs of more than 835,000 homes.

A 62 Siemens Gamesa SG 8.0-167 DD offshore wind turbine will be fixed on jacket foundations in seven rows at the Saint Brieuc offshore wind farm. The rows will be 1.3 km apart, while the wind turbines will be 1 km apart. A 225kV offshore substation will also be developed on a jacket foundation at the heart of the wind farm.

Each of the Siemens Gamesa SG 8.0-167 three-blade direct-drive turbines that will be used by the offshore wind farm will contain a hub height of 207m, blades 81.5m in length, a swept area of ​​21,900m² and a diameter of 167 m. rotor. Each turbine will be able to produce 8 MW of electricity.

The turbines will be installed with the modern High Wind Ride Through (HWRT) system, which slows the power output rather than shutting down when the wind speed exceeds 25m/s. It allows for smoother output deceleration and more authentic power output.

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reported earlier


In January, Siemens Gamesa was appointed turbine supplier for the Saint Brieuc offshore wind farm. Construction of the system was scheduled to begin in 2019 and commissioning was scheduled for 2023.


Atkins was selected as the Front End Engineer and Designer (FEED) and the detailed design tender for the wind turbine envelope substructures in January.


The analysis of the environmental and technical conditions has been completed, it was carried out after the installation of three wind measurement systems on the site. The exercise spent two years recording the wind potential of the region using the LIDAR (Laser Imaging Detection And Ranging) system.

Saint-Brieuc will bear the seal of Spain, as the jackets and piles will be built entirely by Navantia-Windar, in Fene, whose 1,600-tonne crawler crane will be deployed for final assembly, and Avilés, respectively.

The Saint Brieuc offshore wind farm is the largest offshore wind contract in the history of the shipyard at €350m, and it will provide more than 2,000 direct jobs and thousands of indirect jobs. Foundation assembly work began after the arrival of the structural tubes at the ports of Ferrol and Brest. The final assembly of the constituent elements will end in the facilities of the Galician shipyard.

June 2020

A $2.8 billion wind power plant in the Bay of Saint Brieuc will be developed off the coast of France

Wind power

Siemens Gamesa Renewable Energy (SGRE) has received the firm order from Ailes Marine, a subsidiary of Iberdrola, for 62 SG 8.0-167 DD offshore wind turbines for the 496 MW Saint Brieuc Bay offshore wind power plant. This order also includes a 10-year contract for turbine maintenance services.

The offshore wind farm in the Bay of Saint Brieuc will produce the equivalent of the electricity consumption of 835,000 people. The main components of the 62 turbines of the Saint Brieuc bay offshore wind power plant will be produced in the offshore wind factory planned by Siemens Gamesa in Le Havre.

Also read: Germany aims to increase offshore wind power capacity by 2040

Providing clean energy and fighting climate change

According to Andreas Nauen, CEO of Siemens Gamesa’s Offshore Business Unit, they are extremely excited to add France to the many markets around the world where their offshore wind turbines are helping to deliver clean energy and fight climate change. . “Making the Bay of Saint Brieuc Siemens Gamesa’s first firm offshore order in France is a historic moment and demonstrates our desire to grow in the market and drive the globalization of offshore wind power. We thank Ailes Marines for their confidence in our products as well as our manufacturing projects for France,” he added.

Filippo Cimitan, Managing Director of Siemens Gamesa Renewable Energy France, added that this is great news for the energy transition, the offshore wind sector and the industry in France. This first firm order is an important step towards the realization of the industrial plant project in Le Havre and confirms the status of Siemens Gamesa as the leading supplier of offshore wind turbines on the market.

Javier García Perez, president of Ailes Marines and international director of offshore business at Iberdrola, said that by selecting Siemens Gamesa Renewable Energy’s 8 MW wind turbines, the Saint-Brieuc offshore wind farm is ensuring a technology of advanced and high performance. “Ailes Marines is fully committed to the development of the French offshore wind industry, which creates thousands of highly skilled jobs, stimulates France’s green economic and industrial recovery and contributes to achieving net zero targets focused on renewable energy. “, he added.


The Dutch marine service company Van Oord had to take care of 62 jackets and the transport and installation of the marine substation. Van Oord has started work on the high seas with the installation of anchor bolts, for which he will launch his deep sea support boat, Aeolus, specially designed for the construction of offshore wind farms.

It would benefit from the assistance of a second vessel in 2022. The evacuation of energy from the offshore wind farm will be managed by the operator of the French electricity transmission network Réseau de Transport d’Électricité (RTE). RTE is the contracting authority and contracting authority for the connection to the network.

In August, Van Oord’s Aeolus began drilling work on the Saint-Brieuc wind farm off the coast of France after work was interrupted by the spillage of hydraulic fluid from one of the drills.

On October 31, Ailes Marines revealed that the construction exercise for the first phase of the year was complete. To date, 5 wind turbine zones and an electrical substation zone have been drilled.

November 2021

EDS HV Group, a subsidiary of James Fisher Renewables that provides expert high voltage engineering services to the renewable energy industry, has been awarded a contract to provide the commissioning phase of high voltage safety management to Marine Wings.

The company will be responsible for managing all aspects of high voltage safety throughout the construction of the Saint Brieuc offshore wind farm, including electrical safety supervision for all contractors visiting the site. Apparently, in addition to EDS’ own team, local staff will be brought in to help with the monitoring function of the project.