engineer weilding


The construction of an offshore wind farm consists of multiple phases. We will explain more about them on this page.


Energy development

Phases of construction

The construction of an offshore wind farm consists of multiple phases:

  1. Components are produced in different places in Europe;
  2. These components are subsequently transported to Vlissingen – (mostly) over water;
  3. Vlissingen is the marshalling harbour, where the pre-assembly takes place;
  4. From the Maasvlakte in Rotterdam the Van Oord vessels will work on installing the monopiles;
  5. Then the windturbines will be place on top of the monopiles.

Offshore construction

After the pre-construction work has been done in the marshalling harbor, the offshore construction begins. First, the scour protection will be installed on the seabed to prevent erosion of the monopiles and to protect the integrity of the turbines. Then the monopiles are installed.

The cables

The next step is the cable laying (inter-array cables) between the monopiles and the substation of TenneT that the cables need to be connected to. Please see all TenneT’s activities and their planning (in Dutch)

Installation of the wind tubines

Finally, the wind turbines are installed in different steps: first the tower is placed on top of the monopile, then the nacelle is placed on the tower, after which the blades are fixed. Ultimately, the turbine is put into operation.

Alt tag of the image

What will transport look like in 2040

Van Oord is one of the two main contractors for the project, together with MHI Vestas. Van Oord supplies all the vessels for the construction of the wind farm.

boat in ocean

Installation on the seabed

For the installation of the scour protection on the seabed, vessels such as the Bravenes are used. Please watch the video for the information about this vessel and its activities.

Watch the video


Installation of the monopiles

For the installation of the monopiles, Van Oord uses the Aeolus. The Aeolus, purpose-built to construct offshore wind farms, can lift more than 1,600 tonnes with the top-range crane.


Working on water going 45 meters deep

Four giant legs, each measuring 85 meters and weighing 1280 tons, allow Aeolus to be jacked up and work in waters up to 45 meters deep. Watch the video to see how the Aeolus works.

Watch the video

Alt tag of the image

What will transport look like in 2040

For the laying of the cables Van Oord’s first cable-laying vessel for constructing offshore wind farms, the Nexus, is used. The ship is almost 123 meters long and more than 27 meters wide.

Construction progress.

  • Start electricity production

  • Start wind turbine generator installation

  • Start infield cable installation & burial

  • Start foundation installation

Also interesting