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Project Update

Public Information days

We are holding two further information days, where members of the public can meet the construction team and ask questions about the project. Details are included below. We invite you to join us to find out more about our upcoming programme of work to install cabling under railways, roads and rivers to connect the offshore windfarm to the national grid.

Tuesday, 13 February from 1600-1930

Martlesham Heath Pavilion

The Drift

Martlesham Heath



Tuesday, 20 February from 1600-1930

Claydon & Barham Village Hall

8 Norwich Road



Construction update


Construction of the new onshore substation located in Bramford has been underway since summer 2017. Once complete, the substation will convert the electricity which has travelled from the offshore wind turbines and along the 37km onshore route in a form suitable for connection into the national grid.

Above: Construction works at the new onshore substation, near Bramford

Haul road

Our temporary haul road for construction vehicles is about 90% complete across the length of the route. The haul road enables the onward delivery of plant, equipment and materials to the cable route – minimising the impact on the road network. We have nineteen access points to the haul road along the cable route, seventeen of which have been constructed as of February 2018.

Above: Haul road construction. Plant prepare the ground for the temporary stone road

Above: Haul road construction: installation of stone road

Installation of cable ducts

The majority of the cable route runs through farmland and will be installed by digging a trench and laying ducting to house the cable. The cable will then be pulled through at a later date. When excavation works reach a crossing point on the public highway a short-term road closure and diversion will be implemented. For more information please see our Road and Public Right of Way section.

Installation of the cable ducts is now underway.

Underground drilling

Occasionally the route must go under a major transport network or natural obstacle, where it is not possible to use an open trench method to install the cable ducts. In these locations our contractors will use Horizontal Direct Drilling (HDD) or auger bore techniques. HDD is a trenchless method, used to install ducts beneath the ground, through which the power cables for East Anglia ONE will later be pulled.

Above: River Deben drill, work at the pipe side, February 2018

HDD requires two temporary compound locations either side of the drill area:

  • The rig side, where the drill rig is located and where the drill commences.
  • The pipe side, from which to exit the drill and pull a pipe (ducting for the cable) back through the drilled hole.

Above: River Deben drill, pipe side at Ramsholt, February 2018

Drilling commenced in 2017. The drill under the River Deben began in December 2017 and will complete in February 2018. The drill locations are identified in section 2.2 of our Traffic Management Plan.

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