DEME Offshore has completed foundation installation at Orsted’s 1218MW Hornsea 1 offshore wind farm off the east coast of England.
Jack-up vessel Innovation was deployed to install 174 monopiles and transition pieces, with Sea Installer and Sea Challenger also working on the TPs.
Scour protection was carried out by the DEME’s rock placement vessel Rolling Stone.
The Apollo jack-up removed the existing met-mast including decommissioning of the twisted jacket foundation.
DEME Offshore was also responsible for all the logistics related to the foundations, collection and transport of the monopiles and transition pieces.
Barges and transport vessels were hired and all operated from the base port at Able Seaton in the UK.
DEME Offshore business unit manager Jan Klaassen said: “This project demonstrates once more that DEME Offshore is capable of managing large projects of 100 or more units to be installed within a year.
“Our expertise and flexibility to cope with complex logistics and installations is the key to a successful, swift and safe delivery of future large projects, wherever in the world.”
Installation of the last two foundations was late because they needed replacing, after breaking when SAL Heavylift vessel Svenja dropped one while loading in Rostok in November.
Fabricator EEW had to make new structures.