Tetra Tech

Tetra Tech RPS Energy was named as a collaborating partner supporting Fraunhofer IWES on the Netherlands Enterprise Agency (RVO) assignment to develop a fully Integrated Ground Model (IGM) for the Doordewind Wind Farm Zone (DDWWFZ). DDWWFZ is a planned 4 GW offshore wind zone approximately 77 km off the north coast of the Netherlands, split into two 2 GW sites (Doordewind I and Doordewind II), with Doordewind I scheduled for auction in 2027 and anticipated commissioning around 2032. Within the IGM programme, Tetra Tech RPS Energy’s role formed part of the wider engineering and technical advisory effort to integrate, process, and interpret site-characterisation inputs and deliver a coherent, decision-grade ground model. The IGM is intended to be a critical element of RVO’s pre-tender site-data package, helping to reduce uncertainty for future developers and contractors by improving understanding of seabed and shallow subsurface conditions. The sources describe the IGM outputs as enabling the planning of upcoming geotechnical investigations and supporting subsequent design development for offshore wind farm infrastructure. The work was carried out in collaboration with Fraunhofer IWES as lead contractor and with Geowynd as another project partner.