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Upcoming tender for removal of damaged monopile

2022-12-08 Tamara Parkin

08122022december // damaged_monopile_credit_vattenfall.png (486 K)

Photo Credit: Vattenfall

An Invitation to Tender (ITT) has been issued by joint venture partners Vattenfall, BASF and Allianz, for the removal of the Hollandse Kust Zuid offshore wind turbine foundation, which a bulk carrier damaged in January of this year. The tender will be managed by Vattenfall and the removal is scheduled to commence in the first half of 2023. 

According to the joint venture partners, the tender includes the removal of the damaged foundation, the secondary steel and the monopile. Damage occurred to the monopile foundation on January 31 2022, when the vessel Julietta D collided with it after drifting abandoned in the North Sea during a storm. During the incident, the vessel also hit the jacket foundation of the wind farm’s substation. 

Ownership of the farm is split between Vattenfall (50.5% stake), BASF (24.3% stake), and Allianz (25.2% stake). It is the first offshore wind farm built without government subsidies, and first generated power in early August. 

Upon completion of installation and commissioning in the summer of 2023, the Hollandse Kust Zuid will become the largest operating offshore wind farm consisting of 140 wind turbines and a total capacity of 1.5 GW. The total capacity is equivalent to the consumption of around 1.5 million Dutch households. 

As of the beginning of December, 80 of the 140 Siemens Gamesa 11 MW, SG 11.0-200 DD wind turbines have been installed on the monopile foundations. Installation of the remaining wind turbines is set for a March 2023 completion.

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