The last of the 35 turbines was lifted into position by the jack-up vessel Sea Challenger on 27 March 2015. Westermost Rough, located off the UK's East Coast, is the first offshore wind farm to make commercial use of the Siemens 6MW wind turbine.
The wind farm is a joint venture between DONG Energy (50%) and its partners Marubeni Corporation (25%) and the UK Green Investment Bank (25%). Turbine installation has been carried out using the new purpose-built vessel Sea Challenger which is owned by A2SEA. Siemens are supplying and commissioning the 6MW turbines. Construction of the wind farm is being managed from DONG Energy’s office in the Fish Dock, Grimsby on Britain's east coast, by a team of around 50 people.