Consultee Cefas
Date /Document
Meeting 13/09/2013
Comment
Given that the proposed East Anglia THREE project has some areas of different water depth compared to the previously assessed proposed East Anglia ONE project, this will need to be taken into consideration in the expert-based assessments. In relation to this, it would be useful to schematically illustrate a ‘zone of potential effect’ around the project boundary.
Cefas and Natural England
Meeting 13/09/2013
It remains important that an empirical assessment is made of the potential scour hole formation around the wind turbine foundations to inform the subsequent assessments of either: (i) fate of scoured material; or (ii) footprint of scour protection works on the sea bed.
Cefas and Natural England
Meeting 13/09/2013
Given an initial assumption of up to 10% of cables requiring protection (an assumption that subsequently has been further refined – see section 7.3.2), it is accepted that if these areas are in deeper water, beyond the active closure depth for sediment transport in the beach / foreshore zone, then desk- based assessment will suffice. If, however, these areas of protected cable are inshore of the ‘closure depth’ of the shore profile (i.e. within the inter-tidal or nearshore zones) where they could potentially interrupt littoral sediment transport, then further dialogue with Cefas and Natural England is required on the methods for assessment.
Cefas and Natural England
Cefas and Natural England
Meeting 13/09/2013
Meeting 13/09/2013
Further dialogue will be needed with Cefas and Natural England when more detail is available on engineering proposals for cable crossings.
It is acceptable for the cumulative effects to be assessed using proportionate and high- level assessments.
Response / where addressed in this PEIR
Preliminary Environmental Information May 2014
East Anglia THREE Offshore Windfarm Chapter 7 Marine Geology, Oceanography and Physical Processes Page 4
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