Wind Energy – France
DEME Offshore has been awarded two transport and installation contracts for the foundations and the offshore substation for the Yeu and Noirmoutier islands’ offshore wind farm.
For DEME Offshore this is the second major offshore wind farm project in France following ground-breaking solutions and industry-first technology deployed at Saint-Nazaire.
DEME Offshore will execute the pre-piling works for the offshore substation jacket, and the transport and installation of the 2,700-tonne topside. The scope of work also includes the transport and installation of monopile foundations and transition pieces.
The wind farm is being developed by Éoliennes en Mer des Îles d’Yeu et de Noirmoutier.
Just like Saint-Nazaire, the wind farm is located in a very rocky area, with challenging ocean conditions. Therefore, the installation of the monopile foundations will again require DEME’s state-of-the-art drilling technology and some of the equipment, methods and tools deployed at Saint-Nazaire will be reused.
This includes the giant 350-tonne Offshore Foundation Drill developed together with Herrenknecht and the so-called MODIGA. At 60 m high, the MODIGA encapsulates the drilling and installation operations, protecting them from the harsh marine conditions, which in turn, improves operational working time substantially.
DEME’s offshore installation vessel Innovation will carry out the foundation installation. Similar techniques and vessels successfully deployed at the Saint-Nazaire wind farm will be used for the substation pre-piling works, which will be executed in the second half of 2023.
Allseas’ vessel Pioneering Spirit will be used to install the substation jacket and topside. The installation of the monopile foundations, substation jacket and topside are scheduled to start in the first half of 2024.
