The first foundation for the Saint-Brieuc offshore wind farm has been successfully installed
Pleudaniel / Lézardrieux / Saint-Brieuc / Paris - 04 July 2022 -
● Ailes Marines, a company wholly owned by the Iberdrola Group, today announced the successful installation of the first jacket foundation of the 62 wind turbines of the Saint-Brieuc offshore wind farm.
● The wind turbine foundations, the first visible elements of the park.
● A foundation made largely on the Brest polder.
Installation completed on time
Together with the vessel Seven Borealis, Van Oord installed the first foundation for the wind farm, positioned on the northern part of the site.
The installation took place in 3 stages. The foundation was lifted from its barge and then lowered by crane to its location. The tips of the three legs of the truss were inserted into the three piles previously installed by the Aeolus on the sea bed. The sealing of the lower parts of the legs to the piles will soon be carried out by the North Sea Giant.
Work has now started on the installation of the second foundation, also positioned on the northern part of the park.
The foundations, the first visible elements of the park
These foundations with triangular bases, weighing 1,150 tonnes and measuring 75 metres in height, are made up of three elements: the lower submerged part, the upper part and the transition piece, which will later receive the wind turbine. These last two elements are about 20 metres above sea level, depending on the tide.
In parallel with these installation operations, Van Oord is continuing with the Aeolus the drilling and anchoring of the remaining foundation piles. To date, more than a quarter of the wind farm's foundation positions have been drilled and fitted with piles. All of this work will continue until 2023.
A foundation made largely on the Brest polder
The first jacket foundation installed in the Saint-Brieuc park was largely manufactured on the Brest port polder, where Navantia-Windar contracted some fifteen local subcontractors to manufacture certain elements (feet, spikes, crosspieces, etc.) of the 62 foundations. Their construction on a dedicated 11-hectare site to the north of the Brest polder has mobilised 250 jobs (oxycutters, welders, handling operators, scaffolders, quality supervisors, etc.) over a two-year period between 2020 and 2022.
Emmanuel Rollin, Vice President of Ailes Marines and Director of Offshore France at Iberdrola, was pleased with the results. The installation of this first foundation at sea is a real success for the project and for all the local players who took part in its construction in Brest. We can only be proud of this success, a significant step in the development of marine renewable energy in Brittany and a symbol of the establishment of this new industrial sector. "
About Ailes Marines
- 75 km2 in area
- 62 Siemens Gamesa SG 8.0-167 DD 8 MW wind turbines
- 496 MW of installed capacity
- 1,820 GWh/year of production, i.e. the annual electricity consumption of 835,000 inhabitants (including heating)