Next Geosolutions

NextGeo completed offshore route survey activities (non-UXO) for transmission system operator TenneT on export cable routes in the Dutch North Sea, including the IJmuiden Ver Alpha, IJmuiden Ver Beta and IJmuiden Ver Gamma corridors. The work combined geophysical and geotechnical survey methods to characterise seabed conditions and inform the engineering and routing of future offshore electricity connections. The survey programme acquired data across more than 37,000 hectares and was executed using a multi-vessel spread comprising six offshore vessels, six nearshore vessels and three tidal vessels. NextGeo reported that these activities were carried out over a period of more than two years and culminated in the final reporting phase being completed in 2022. This survey scope supported TenneT’s preparation of offshore grid connections for the IJmuiden Ver wind energy area, including the IJmuiden Ver Gamma connection that will enable grid export for the IJmuiden Ver Gamma-A (and Gamma-B) 1 GW wind farm sites via a shared 2 GW HVDC platform and onshore landfall at Maasvlakte. The completed route survey dataset provided baseline seabed and subsurface information required for subsequent cable corridor definition, risk reduction, and permitting and construction planning.