Dutch wind farm to tender for removal of damaged foundation

4C Offshore | Tom Russell
By: 02/12/2022 Vattenfall

Vattenfall Hollandse Kust Zuid, a joint venture between Vattenfall, BASF and Allianz, has issued an Invitation to Tender (ITT) for the removal of the damaged monopile in the Hollandse Kust Zuid wind farm.


On January the 31st of 2022, the vessel Julietta D collided with one of the foundations of the wind farm, causing significant damage to this monopile. The tender entails the removal of the damaged foundation, including both the secondary steel and the monopile. 

The tendering process will be managed by Vattenfall’s construction team and aims for execution of removal starting in the first half of 2023. 


The Hollandse Kust Zuid wind farm zone consists of two sites, Hollandse Kust Zuid 1&2 and Hollandse Kust Zuid 3&4, and is being developed by Vattenfall, which secured the rights to the projects with subsidy free bids in March 2018 and July 2019.

The wind farms are located between 18 and 36 kilometres off the Dutch coast, between the Hague and Zandvoort. They will be fitted with 140 units of Siemens Gamesa 11 MW, SG 11.0-200 DD offshore turbines. Once the wind farm is operational, the 140 wind turbines will produce more than 6 TWh of green electricity annually.
It is owned by Vattenfall (50.5% stake), BASF (24.3% stake), and Allianz (25.2% stake).

Once fully operational, the wind farm will be the largest offshore wind farm in the world with 140 wind turbines and a total installed capacity of 1.5 GW. The project is expected to become fully operational in 2023. Cadeler announced earlier today (2 December 2022) that wind turbine 80 has been installed at the site.


For more information on offshore wind farms worldwide, click here.