2 REVISED PROJECT DESCRIPTION
2.1 Introduction 12.
This section of the Phase III Report details the updates to the project description and potential implications.
2.2 Removal of Scenario 2 (Trenching)
13. On 16th June 2014 East Anglia ONE Limited (EAOL) received consent for the East Anglia ONE project (the East Anglia ONE Offshore Wind Farm Order 2014). The DCO for the East Anglia ONE project includes cable ducts for further projects planned to connect to the grid at Bramford in Suffolk. Therefore, there is now a commitment from EAOL that the ducts for the proposed East Anglia THREE project will be installed at the same time as the cables are laid for East Anglia ONE. These would be installed along the Onshore Cable Route with all horizontal directional drilling (HDD) operations and trenchless crossing techniques undertaken at the same time.
14.
As the East Anglia ONE project was not consented at the time of the PEIR publication, it was not known if the East Anglia ONE project would be consented, or if the project would obtain permission to install ducts for future projects. Therefore the East Anglia THREE PEIR assessed two scenarios – Scenario 1 where ducts were pre-installed by East Anglia ONE; and Scenario 2 where no ducts were present and East Anglia THREE had to open trench its cables. With the successful consent of the East Anglia ONE project, Scenario 2 no longer needs to be considered and has been removed.
15.
As a result of removing Scenario 2 there are no HDD or open trenching engineering techniques proposed as part of the East Anglia THREE project; this limits the amount of construction work necessary for the proposed East Anglia THREE project. The implications of Scenario 1 (i.e. pulling the cables through pre-laid ducts) being taken forward include:
Fewer vehicle movements (e.g. from reduced plant required for excavation, no requirement for HDD plant and reduced amount of spoil);
Fewer accesses required (see section 2.4) (for example access will only be required to specific areas along the cable route such as jointing bay locations);
Less noise disruption (fewer vehicle movements and no HDD operations);
Phase III Report June 2015
East Anglia THREE Offshore Windfarm Page 5
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