The 23-metre diameter, one-metre high, baseplate for the prototype foundation was manufactured by French construction firm Eiffage. MT Hojgaard is responsible for the foundation's installation at the 498MW Fécamp offshore wind project currently being developed by a consortium led by EDF Energies Nouvelles.
The unit will be fitted with a Lidar to collect data for future optimisation of the foundation. The total completed structure of foundation, mast and ballast will weigh 1,760 tonnes.
The hybrid concrete and steel structure can be towed by conventional tugs, thereby reducing construction costs and installation risks, said its designer Seatower.
In the next stage of construction a conical concrete and steel structure will be placed on the base, said MT Hojgaard's director of offshore, Kim R Andersen. The complete structure should be ready for installation in "a few months".