4 DISCUSSION AND SUMMARY
4.1.1 Offshore 39.
As can be seen fromTable 3.1, it is considered that the changes to the project design do not result in any changes to the likely significance of the impacts assessed in the PEIR for any of the topics covered. These assessments will be reviewed and undertaken within the EIA and reported within the ES which forms part of the DCO application.
40.
The key change in the project since the PEIR in relation to offshore topics is the potential for a phased approach to construction. The phased approach does not result in large changes to the final infrastructure in place for the operational East Anglia THREE project and the impacts most likely to affect receptors are expressed in the operational phase.
41.
There would be some differences between the constructed Single Phase and Two Phased approaches (i.e. length of cables required, one more platform in the worst case) but when the detailed assessment is undertaken these are considered unlikely to result in changes to significance. The effect of phasing will increase the overall duration of construction from the commencement to completion of offshore works, but there will be a reduction of the peak effect.
42.
With regard to piling, the Two Phased approach would mean that piling would be undertaken over a longer period (although the actual total duration of piling events would be unchanged). For affected topics (i.e. Fish Ecology and Marine Mammal Ecology) it will be necessary to revisit the cumulative assessment to determine if the projects included in the cumulative assessment need to be revised.
4.1.2 Onshore 43.
As can be seen fromTable 3.2, it is considered that the changes to the project design have the potential to result in changes to the significance of some of the impacts assessed in the PEIR. All assessments will be reviewed and undertaken within the EIA and reported within the ES which forms part of the DCO application.
44.
There are a number of key changes in the project since the PEIR in relation to onshore topics, mainly relating to the removal of Scenario 2 (trenching), the introduction of phasing and the number of pits excavated to house jointing bays, the reduction in the number of accesses to the Onshore Cable Route, and the introduction of the LFAC electrical solution as an alternative to HVDC.
45.
Phase III Report June 2015
The two onshore topics which will be discussed further in this document are: East Anglia THREE Offshore Windfarm Page 35
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