55.


Six broad pressure categories which may cause deterioration of natural habitats within SACs, either alone or in combination (and thus affect Favourable Condition), have been identified as1:


 Physical loss;  Physical damage;  Non-physical disturbance;  Toxic contamination;  Non-toxic contamination2; and  Biological disturbance3.


56.


The potential effects to offshore habitats from the proposed project have been identified as follows:


 Construction o Temporary physical disturbance; o Smothering due to increased suspended sediment; o Re-mobilisation of contaminated sediments; and o Underwater noise and vibration.


 Operation o Permanent habitat loss; o Physical disturbance through maintenance activities; o Smothering through increased suspended sediment; o Re-mobilisation of contaminated sediments; o Introduction of new substrate; and


1 These are generic conservation objectives and pressure categories taken from the Haisborough, Hammond and Winterton candidate Special Area of Conservation: Formal advice under Regulation 35(3) of The Conservation of Habitats and Species Regulations 2010 (as amended), and Regulation 18 of The Offshore Marine Conservation Regulations (Natural Habitats, &c.) Regulations 2007 (as amended) (JNCC and Natural


England 2013b). 2 For some sites this includes changes in nutrient and / or organic enrichment and / or in salinity. 3 For some sites this includes the introduction of non-native species and / or the selective extraction of species.


HRA High Level Screening May 2014


East Anglia THREE Offshore Windfarm Page 17


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