Table 10.20 Potential Impacts Identified for Benthic Ecology Potential Impact


Receptor Construction


Temporary Physical disturbance


Smothering due to increased suspended sediment


Re-mobilisation of contaminated sediments


Underwater noise and vibration


Operation Permanent habitat loss


Physical Disturbance through maintenance activities


Smothering through increased suspended sediment


Re-mobilisation of contaminated sediments


Colonisation of foundations and cable protection


Impacts on sites of marine conservation interest


Benthic Habitats and species Negligible to Medium


Benthic Habitats and species Benthic Species Benthic Species Low Low Negligible Low Minor adverse


Low to medium Negligible to Minor adverse


Negligible Negligible Negligible Negligible None None None None Minor adverse Minor adverse Negligible Negligible


Value/ Sensitivity Magnitude


Significance


Mitigation


Residual Impact


Benthic Habitats and species Benthic Habitats and species


Benthic Habitats and species


Low to Medium Low Low


Low


Low to Medium Negligible to low


Benthic Habitats and species Negligible Benthic Habitats and species Outer Thames SPA Negligible Low to Medium Low Low low


Negligible Negligible


Minor adverse Negligible Minor adverse Negligible


None None


None None None


To be discussed


Preliminary Environmental Information May 2014


East Anglia THREE Offshore Windfarm


Minor adverse Negligible


Minor adverse Negligible Minor adverse Negligible


Chapter 1 Introduction Page 89


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