5.2 Overview of the Project 8.
East Anglia THREE Limited (EATL) propose that the proposed East Anglia THREE project would consist of between 100 and 172 wind turbines, each having a rated capacity of between 7 and 12MW, with a total installed capacity of up to 1,200MW. It is estimated that the maximum wind turbine hub height used would be 133m (above LAT with maximum rotor diameter likely to be 220m, with a maximum tip height of up to 247mabove LAT. It is possible that more than one and up to a maximum of three turbine models would be used.
9.
Up to three offshore collector stations and two offshore converter stations would collect electricity from the wind turbines and transport it to shore via up to four export cables. An accommodation platform may be installed within the East Anglia THREE site to provide accommodation for the construction and maintenance work force.
10. Once on shore up to four buried cables with bundled fibre optic (FO) cables would transport electricity to the connection point with the National Grid at Bramford substation in Suffolk.
11.
The East Anglia THREE offshore cable corridor would follow a similar offshore cable corridor to that proposed within the East Anglia ONE Development Consent Order (DCO).
12.
The draft Development Consent Order (DCO) for the East Anglia ONE Offshore Windfarm comprises its offshore and onshore export cables, the converter station at Bramford and onshore cable ducts for two further projects planned to connect to the grid at Bramford. To minimise disruption to local communities, it is hoped it will be possible to install this ducting at the same time as the cables are laid for East Anglia ONE. However, this is subject to consent. Therefore, the East Anglia THREE application will present an environmental impact assessment of:
Scenario 1: use of pre-installed ducts; or
Scenario 2: open-trenching for cables for East Anglia THREE and installation of ducts for East Anglia FOUR.
13. The two options considered are based on the following assumptions:
For Scenario 1 it is assumed that ducts would be installed for the East Anglia THREE cables during construction of East Anglia ONE. These would be installed along the entire length of the onshore cable route and all horizontal directional drilling (HDD) operations would be undertaken at the same time; and
Preliminary Environmental Information May 2014
East Anglia THREE Offshore Windfarm
Chapter 5 Description of the Development Page 3
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