OHT to transport and install foundations at Dogger Bank Wind Farms in the North Sea

OHT has been selected as preferred supplier for the foundation installation at the world’s largest offshore wind farm Dogger Bank.

Under the agreement, OHT’s new build vessel Alfa Lift will carry out the transport and installation of monopile foundations and transition pieces for the Creyke Beck A and B wind farms.

Utilising a single vessel, the foundations will be transported to the offshore site, approximately 130km off the north-east coast of England, and installed in water depths of up to 35 metres. The Alfa Lift heavy installation crane vessel will carry 10 monopiles and transition pieces on deck per voyage. The monopiles will be among the largest ever installed.

The Dogger Bank Wind Farms, being developed by SSE Renewables and Equinor, were recently awarded Contracts for Difference (CfDs) in the UK government’s latest auction round.

OHT’s Alfa Lift vessel features a 3,000-tonne crane and more than 12,300 square metres of available deck space. The main deck will incorporate a fully automated skidding system, whilst the forecastle deck will carry transition pieces and mission equipment. The vessel has a capacity to carry a total payload of up to 51,250 tonnes.

Transport and installation of monopiles and transition pieces is expected to be performed between 2022 and 2024.