92. 93.


Issues arising from navigational safety and aviation are dealt with in Chapter 15 Shipping and Navigation and Chapter 16 Aviation and MOD, respectively.


Given the distance between the East Anglia THREE site and nearest offshore windfarm projects (Scroby Sands, Galloper and Greater Gabbard) there is limited overlap in infrastructure apart from at and in the vicinity of cable crossings. It is therefore considered that there is limited potential for maintenance activity interactions. In addition, any works at cable crossings will be subject to the conditions of the crossing agreements and therefore potential for impact will be mitigated. The magnitude of impact upon other windfarms during the operation of the proposed East Anglia THREE project is considered negligible, with a high sensitivity of receptor. The impact is therefore considered to be ofminor adverse significance.


94.


With regard to increased pressure on port facilities, it is not possible at this time to determine pathways for impact as the operation and maintenance (O & M) port for East Anglia THREE has yet to be determined. Effects will be specific to the port(s) under consideration. In addition, part of the selection and procurement process for the port(s) chosen for O & Mof East Anglia THREE will take into account capacities and schedules to determine feasibility of their being able to adequately resource the requirements of East Anglia THREE.


18.6.2.2 Impact 2: Impacts upon the Burial of Existing Cables and Pipelines 95. During operation of the proposed East Anglia THREE project, there is the potential for the presence of the foundations and wind turbine towers to cause changes to the tidal and wave regimes as well as the sediment regime, which may in turn, lead to the burial or exposure of existing cables and pipelines.


96.


Chapter 7 Marine Geology, Oceanography and Physical Processes covers these changes in detail and assesses their magnitude. The effects on the tidal regime during operation are expected to be very small and localised. Similarly, effects on the wave and sediment regime during operation are predicted to be localised and low in magnitude.


97.


Sensitivity of existing cables and pipelines to burial is considered low and taking into account the findings of Chapter 7 Marine Geology, Oceanography and Physical Processes the magnitude is also considered to be negligible resulting in an impact of negligible significance.


Preliminary Environmental Information May 2014


East Anglia THREE Offshore Windfarm


Chapter 18 Infrastructure and other users Page 30


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