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Table 11.1 NPS Assessment Requirements NPS Requirement


There is the potential for the construction and decommissioning phases, including activities occurring both above and below the sea bed, to interact with seabed sediments and therefore have the potential to impact fish communities, migration routes, spawning activities and nursery areas of particular species. In addition, there are potential noise impacts, which could affect fish during construction and decommissioning and to a lesser extent during operation.


The applicant should identify fish species that are the most likely receptors of impacts with respect to:


• • • • •


spawning grounds; nursery grounds; feeding grounds;


over-wintering areas for crustaceans; and migration routes.


Where it is proposed that mitigation measures of the type set out in paragraph 2.6.76 below are applied to offshore export cables to reduce electromagnetic fields (EMF) the residual effects of EMF on sensitive species from cable infrastructure during operation are not likely to be significant. Once installed, operational EMF impacts are unlikely to be of sufficient range or strength to create a barrier to fish movement


EMF during operation may be mitigated by use of armoured cable for interarray and export cables that should be buried at a sufficient depth. Some research has shown that where cables are buried at depths greater than 1.5m below the sea bed impacts are likely to be negligible. However, sufficient depth to mitigate impacts will depend on the geology of the sea bed.


During construction, 24 hour working practices may be employed so that the overall construction programme and the potential for impacts to fish communities is reduced in overall time.


The construction and operation of offshore wind farms can have both positive and negative effects on fish and shellfish stocks.


Effects of offshore wind farms can include temporary disturbance during the construction phase (including underwater noise) and ongoing disturbance during the operational phase and direct loss of habitat. Adverse effects can be on spawning, overwintering, nursery and feeding grounds and migratory pathways in the marine area. However, the presence of wind turbines can also have positive benefits to ecology and biodiversity.


Assessment of offshore ecology and biodiversity should be undertaken by the applicant for all stages of the lifespan of the proposed offshore wind farm and in accordance with the appropriate


Preliminary Environmental Information May 2014


East Anglia THREE Offshore Windfarm EN-3 section 2.6.75


NPS Reference EN-3 section 2.6.73


EN-3 section 2.6.74


EN-3 section 2.6.76


EN-3 section 2.6.77


EN-3 section 2.6.122


EN-3 section 2.6.63


EN-3 section 2.6.64


Appendix 11.2 Page 5


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