The first "gravity based foundation" (GBF) for the offshore wind farm Kriegers Flak has been installed in the Baltic Sea off Denmark.
Jan De Nul said the 8,000-tonne GBF was floated off a semisubmersible barge and towed to the installation location.
The heavy lift vessel Rambiz, in combination with an in-house designed ballast module, set the structure down onto the seabed.
The second GBF, which weighs 10,000 tonnes, will be installed as soon as possible, depending on weather conditions.
Both foundations were constructed by Jan De Nul Group with Smulders on a barge at Belgium's Port of Ostend.
Once the foundations have been installed, Adhémar de Saint-Venant will start ballasting and scour protection works.
By 2022, Denmark's largest offshore wind farm will start generating CO2-free electricity for 600,000 households.
The interconnector project is funded by the European Energy Program for Recovery.
