ScottishPower Renewables and Masdar have achieved a significant construction milestone at the East Anglia THREE offshore wind farm project, located off the coast of Suffolk. All 95 foundations have been installed at the site, completing a major phase of the £4 billion development.
The foundations represent substantial engineering components, with each monopile weighing between 1,200 and 1,800 tonnes and standing 67 to 84 metres tall with diameters up to 10.6 metres. These are noted as the largest monopiles installed from a jack-up vessel in Europe. The project team also finished installing 95 transition pieces, each 20 metres in height, 8 metres in diameter, and weighing over 400 tonnes. Seaway7, operating the jack-up vessel Seaway Ventus, executed the foundation installation work.
Turbine installation is currently underway at the site, with construction activities set to continue throughout the coming months. The project is scheduled to reach full operational status by the end of 2026, at which point it will generate 1.4 gigawatts of clean power. The facility will be capable of supplying electricity to approximately 1.3 million UK homes, contributing to the nation’s energy security objectives.
The joint venture represents Masdar’s first 50:50 offshore wind partnership in the UK and is part of a broader €15 billion strategic partnership between Masdar and Iberdrola. The project has driven significant investment in the UK supply chain, with nearly £2 billion committed to domestic suppliers. Construction efforts are supporting 2,300 jobs during the building phase, with approximately 100 permanent positions expected to be created during the facility’s operational lifetime.
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