Boskalis to Install 149 km of Inter-Array Cables at Zeevonk Wind Farm in the Netherlands

Zeevonk, the joint venture between Vattenfall and Copenhagen Infrastructure Partners, has contracted Boskalis for the transport and offshore installation of the inter-array cable system serving phase 1 of the Zeevonk Offshore Wind Farm in the Dutch North Sea.

The marine services company, headquartered in Papendrecht, the Netherlands, announced the award in a press release dated 1 October 2026 issued from its home port. Boskalis classifies the contract as sizable, a category the company uses for orders valued between USD 56.5 million and USD 169.5 million.

Cable Scope Covers 69 Turbines and Seabed Works

The work package includes the transport and installation of roughly 149 kilometers of 66 kV inter-array cables linking 69 wind turbines within the wind farm. Alongside cable laying, Boskalis will handle cable testing and termination as well as installation of the cable protection systems.

The assignment also reaches beyond the cables themselves. The company will carry out survey activities and seabed intervention works, deploying one of its subsea rock installation vessels for that portion of the job.

BOKA Ocean to Run the Offshore Campaign

Cables will be transported from the manufacturing facility in Eemshaven, the Netherlands, to the wind farm site, with the offshore installation campaign to be executed by Boskalis' cable-laying vessel BOKA Ocean, which the company describes as state-of-the-art. Engineering activities are due to begin shortly, and offshore installation is currently planned for 2029.

Two-Phase Development Near IJmuiden

The Zeevonk Offshore Wind Farm sits approximately 45 nautical miles northwest of IJmuiden in the Netherlands. Once complete, the project is expected to reach a total installed capacity of about 2 gigawatts, positioning it among the largest offshore renewable energy developments in the country.

The wind farm will be built in two phases of roughly 1 GW each. The Boskalis contract covers phase 1 only, which has a planned commercial operation date in 2029. The contracting entity, Zeevonk, is itself the joint venture of Vattenfall and Copenhagen Infrastructure Partners.

Renewables Fit Within Boskalis Strategy

Boskalis states that its strategy is built on leveraging key macro-economic drivers of worldwide demand in its markets: expansion of the global economy, growth in energy consumption, global population growth, and the challenges associated with climate change. The company frames this project as tied to the development of renewable energy generation, a demand it links to climate change and rising energy consumption.

Company Background

Boskalis is a leading global services provider active in dredging, maritime infrastructure and maritime services. It delivers solutions to infrastructural challenges in maritime, coastal and delta regions worldwide.

Core activities include coastal defense, riverbank protection and land reclamation, enabling the company to offer adaptive and mitigating responses to climate change effects such as extreme weather and rising sea levels, as well as to the growing need for space in coastal and delta regions.

The company also facilitates development of offshore energy infrastructure, including renewable wind energy, and is engaged in constructing and maintaining ports, waterways, access channels and civil infrastructure.

Boskalis additionally operates as a global marine salvage expert and supplies terminal services at numerous locations around the world. It runs a versatile fleet of more than 400 vessels and floating equipment and employs over 11,000 people.