Fugro Concludes Site Investigations for TenneT’s Offshore Grid Links

Dutch geological data specialist Fugro has completed land and marine site investigations for transmission system operator (TSO) TenneT Germany, to support the development of the LanWin1 and LanWin2 offshore grid connection projects.

These projects are part of TenneT Germany’s 2 GW program, a major initiative that aims to connect at least 14 offshore connection systems to the onshore electricity grid, delivering clean energy to up to 35 million European households.

The LanWin2 cable route required a range of onshore and nearshore investigation activities to support project development. Fugro’s new GroundIQ service enabled low-impact geophysical surveys, including electrical resistivity profiling and patented 3D ambient noise tomography, a technique that uses naturally occurring vibrations to map subsurface conditions without intrusive methods.

The geotechnical phase involved borehole drilling and cone penetration testing (CPT) at 15 locations, including four in nearshore intertidal zones. Fugro’s ARAN 250 jack-up platform was specially configured for shallow operations, reducing seabed disturbance and minimizing environmental impact in these sensitive areas.

At sea, Fugro deployed four specialist survey vessels to meet TenneT Germany’s need for detailed engineering data to guide cable routing and installation.

The Fugro Frontier, Fugro Pioneer, and Scotia conducted geophysical, unexploded ordnance, and electromagnetic crossing surveys for both