ěrsted Wind Power has awarded a contract to install 380 km of export cables for the Hornsea 2 offshore windfarm in the UK.
The contract was awarded to Royal Boskalis Westminster. The project scope includes preparing the offshore export cable route (geophysical survey, boulder clearance and seabed levelling through dredging), and installing and protecting the cables.
The three 130-km long export cables will connect the offshore substation to the onshore substation by means of 300-m of horizontal directional drilling, crossing the sea defence at Horseshoe Point on the east coast of the UK. The project is expected to commence later this year with a planned completion late 2021.
Boskalis said it aims to maximise UK local content for its scope of work and will deploy a range of specialist services and assets including a trailing suction hopper dredger, geophysical survey vessel and multiple cable-laying vessels.
Boskalis has also invested in a new multi-mode plough for prelay trenching and backfilling. The plough is built for a continuous pull of 200 tonnes, is capable of trenching at a range of depths and in a wide range of soils with minimal environmental impact. The plough will be pulled by the construction vessel Boka Falcon.
Hornsea 2 will consist of up to 165 turbines with a maximum capacity of 1.4 GW and is located approximately 90 km off the Yorkshire coast.