Asso Subsea secures nearshore cable installation scope for TenneT's 2GW projects

Asso Subsea has been awarded the nearshore cable installation scope for three key projects under TenneT’s 2GW Program: BalWin4, LanWin1, and LanWin5.

These projects are located off the northwestern coast of Baltrum Island, in northern Germany. The works will be carried out in collaboration with Jan De Nul, which will act as the main contractor.

Each project involves the transportation and nearshore installation of a complex cable bundle comprising two HVDC power cables, one metallic return cable, and one fiber optic cable. Installation will be executed in 2027 (BalWin4), 2028 (LanWin1), and 2029 (LanWin5) respectively.

The scope of work includes: cable transpooling from load-out ports in the Netherlands or Germany; nearshore installation operations using the cable laying vessel Atalanti, which will be specially modified to accommodate the four-cable bundle configuration; precision cable landing via beaching operations with spud cans; and cable free-lay in intertidal zones and wet storage of cable ends.

Asso Subsea said the nearshore operations are highly sensitive to tidal conditions, requiring detailed planning and precise execution.