 Scenario 2: open-trenching for cables for the proposed East Anglia THREE project, and for ducts for the proposed East Anglia FOUR project.


11. 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


 For Scenario 2 it is assumed that the whole of the onshore cable route would consist of open cut trenches for up to four cables for the proposed East Anglia THREE project, and up to four ducts for the proposed East Anglia FOUR project.


12. A maximum 55m working width has been assumed for both scenarios (within a 75m red line boundary), representing a “worst case scenario”.


13.


For further information on the two scenarios, please see Chapter 5 Description of the Development.


28.3.2.2 Offshore 14.


Potential offshore socio-economic impacts associated with proposed East Anglia THREE project are:


 ‘Low’ impact: where the current pattern of procurement for the construction of offshore windfarms observed in the UK to date is followed (approximately 20% UK based), with information from the developers indicating that current regional potential is approximately 15%.


 ‘Medium’ impact: taken as the median point between the low and high impact scenarios, at 35%, while the regional potential is taken as the median point between the current low scenario and precedent and apprenticeships with regional sourcing, assuming some regional infrastructural strengthening takes place.


 ‘High’ impact: taken as 50% UK based, and is arrived at as the aspiration for offshore wind development UK supply chain retention as stated by the Offshore Wind Developers’ Forum.


1 This is taken as where the wider UK has attracted offshore wind manufacturing facilities resulting in a major increase in the share


1 At the meeting on 6 February 2012, the OWDF agreed the following: "The UK to be the centre of offshore wind technology and deployment, with a competitive supply chain in the UK, providing over 50 per cent of the content of offshore wind farm projects." http://www.thecrownestate.co.uk/energy/offshore-wind-energy/working-with-us/offshore-wind-developers-forum/


Preliminary Environmental Information May 2014


East Anglia THREE Offshore Windfarm


Chapter 28 Socio-economics Page 8


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