Jan De Nul begin construction of Thor wind farm near Denmark;
Credit: RWE
Luxembourg-based offshore energy and construction company Jan De Nul has announced the commencement of the installation of the foundations for Denmark’s largest offshore Wind Farm.
On Tuesday 29 April 2025, Jan De Nul began installing monopile foundations for German multinational energy company, RWE, at its “Thor” offshore wind farm, which will deliver renewable energy to over one million Danish homes. As well as positioning 72 monopile foundations, Jan De Nul will also install scour protection systems, export cables and inter-array cables for the wind farm, which connect the offshore and onshore substations.
Located approximately 22 kilometres off the west coast of Jutland, the completed wind farm will consist of 72 wind turbines, generating a capacity exceeding 1GW. The project team expects it to play a major role in supporting Denmark’s energy transition goals.
To complete the project, Jan De Nul is utilising the vessel “Les Alizés” to collect the foundations from Eemshaven (the Netherlands) and sail them to the installation site near Thorsminde (Denmark). Each monopile foundation measures up to 100m in length and weighs up to 1,500 tonnes.
CEO of Offshore Energy at Jan De Nul, Philippe Hutse, said: “RWE’s Thor offshore wind farm is one of Jan De Nul’s key projects for 2025. It marks an important step in the energy transition and we are contributing across several areas, from laying export and inter-array cables to installing scour protection and monopile foundations. We are deploying various vessels from our fleet to handle the range of expertise required.”
Project Director for Thor at RWE, Günther Fenle, said: “Our Thor offshore wind farm is currently under construction and will become Denmark’s largest to date. Successfully installing the first monopile is a major milestone, made possible by the joint efforts of everyone involved. I want to thank all colleagues and suppliers for their valuable contributions so far.”
The team plans to complete the installation of the foundations by the end of 2025.
