Asso Subsea has been awarded the nearshore cable installation contract for three key projects under TenneT’s 2GW Programme – BalWin4, LanWin1, and LanWin5.
These projects are located off the northwestern coast of Baltrum Island, in northern Germany, and mark the beginning of a new collaboration with Jan De Nul, acting as the main contractor, with TenneT as the end client.
Each project involves the transportation and nearshore installation of a cable bundle comprising two HVDC power cables, one metallic return cable, and a fibre-optic cable.
The installation work for BalWin4 will start in 2027, with LanWin 1 cable installation taking place in 2028, followed by LanWin 5 in 2029.
Cables will be transported from load-out ports in the Netherlands or Germany, and nearshore installation operations will be carried out using the cable-laying vessel Atalanti (pictured), which will be specially modified to accommodate the four-cable bundle configuration.
Asso Subsea will also be responsible for precision cable landing via beaching operations with spud cans, and cable free-lay in intertidal zones and wet storage of cable ends.
A spokesperson for the company said: “These nearshore operations are highly sensitive to tidal conditions, requiring detailed planning and precise execution.
“Our in-house capabilities, vessel adaptability, and commitment to engineered solutions ensure that we’re ready to meet the unique demands of these technically challenging works.
“This award underscores Asso Subsea’s continued role in Europe’s offshore energy expansion and highlights our evolving partnership network as we continue to support the energy transition.”
The TenneT 2GW Programme will comprise a total of 14 offshore grid connections to deliver clean energy from wind farms located in the North Sea.