EIA topic
Change in project parameters (as applicable to each topic)
Potential for LFAC export cables
Key changes in effect/s footprint of habitat loss
There are differences in the effects on EMF from alternating current
Decommissioning
As above – limited changes in infrastructure to be removed at decommissioning
Marine Mammal Ecology Construction
As cables will be left in situ, the only additional impact is from the removal of one additional platform
There are limited changes in the infrastructure required – in the worst case one additional offshore platform.
Phasing would mean that piling activities would potentially be undertaken over a longer period
Phasing requires more vessel movements for construction
Operation
No relevant changes for operation
Under the worst case there is one additional platform, therefore a slight increase in magnitude of effect.
The period over which piling will occur will change.
Likely change in impact significance
impacts.
EMF effects will be limited under either the LFAC or HVDC solution, there will be no change in impact significance
As above, limited changes in magnitude of effect will not change the significance of impacts.
The windfarm capacity remains up to 1200MW therefore the worst case scenarios previously considered (in terms of piling hammer energy and number of piling events) are unchanged, impact significance will not change
There will be a greater risk of collisions with more vessel movements
None
Standard mitigation will apply the risk will not increase.
No change
The ES will update the assessment for the revised parameters.
Phasing will be discussed for construction impacts
The assessment will be updated to reflect any changes in piling timings (including potential cumulative impacts)
Comment
Phase III Report June 2015
East Anglia THREE Offshore Windfarm Page 23
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