22.7.3 Potential Cumulative Impacts during Decommissioning
22.7.3.1 Landfall and onshore cable route 211. It is anticipated that the onshore cable would be decommissioned (de-energised) and most likely the cables left in-situ. However, where cables have been installed in pre-installed ducts (future projects) it may prove possible to extract the cables relatively easily during the decommissioning phase. It has also been assumed that the jointing pits will be left in-situ.
212. Should East Anglia THREE and FOUR be installed using pre-installed ducts, extraction of the cables during the decommissioning phase would be anticipated to have a similar impact as for East Anglia ONE. This assumes that the jointing pits and cable ducts will be left in-situ.
213. The worst case scenario will be if excavation of the buried cables is required for decommissioning and if this is undertaken sequentially for each of East Anglia ONE, East Anglia THREE and East Anglia FOUR. Impacts would be similar to but of lower magnitude for construction under Scenario 2 as discussed in section 21.6.1.
22.7.3.2 Converter station 214. The details regarding the decommissioning of the converter stations are currently unknown. The worst case scenario is considered to be consecutive removal and reinstatement. Decommissioning would be undertaken in line with legislation, policy and best-practice guidance in place at the time.
22.8 Inter-relationships
215. Parameters or “sources” that are considered to interact with receptors identified in this chapter are listed in Table22.15 below.
Table 22.15. Inter-relationships with Land Use Inter-relationship
All Phases Soils, Geology and Ground Conditions
Ecology (Invasive species and Nature Conservation Sites)
Onshore archaeology and cultural heritage
Traffic and Transport (Roads and Access)
Socioeconomics Section where addressed 22.5, 22.6, 22.7 22.5, 22.6, 22.7 22.5, 22.6, 22.5, 22.6, 22.7 22.5, 22.6, 22.7 Linked Chapter Chapter 19 Chapter 23 Chapter 25 Chapter 27 Chapter 28
Preliminary Environmental Information May 2014
East Anglia THREE Offshore Windfarm
Chapter 22 Land Use Page 59
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