extraction areas.


HDD to avoid impacts upon sensitive features and areas of significant flood risk where practicable such as River Deben, Kirton Creek, Martlesham Creek, River Gipping


Construction


The onshore cable route will be installed underground / below river bed tominimise potential impacts to flood risk receptors,


Reinstatement following cable installation to include:


 Reinstatement of bank profiles;  Retain and relay vegetation to ditch sides; and  Reinstatement and planting at watercourses and dykes to match existing contours and materials.


Pollution prevention measures will be implemented in accordance to Environment Agency Pollution Prevention Guidance series, in particular


 General guide to the prevention of water pollution: PPG1;  Working at construction and demolition sites: PPG6;  Works and maintenance near water: PPG5;  Dewatering of underground ducts and chambers: PPG20; and  Pollution incident response planning : PPG21.


Converter Station Construction


Design principles to adhere to Landscape Ecology and sustainable drainage system (SUDS) finishes and materials.


26.


In addition to the embedded mitigation outlined above all construction, operational and decommissioning phase activities will be undertaken in line best working practices, which will include:


 Adherence to best practices and guidance to ensure the risk of pollution is minimised including site management best practice, such as those set out in the Environment Agency’s PPG notes, adopted during the construction and operational phases to prevent such spillages and leakages. These are detailed in section 21.4;


 Adherence to a CoCP; and


 Adherence to the Construction Design and Management (CDM) Regulations (2007) where applicable.


21.4 Assessment Methodology


21.4.1 Guidance 27.


This assessment has been made with specific reference to the relevant National Policy Statements (NPS). These are the principal design making documents for Nationally Significant Infrastructure Projects (NSIP). The specific assessment


Preliminary Environmental Information May 2014


East Anglia THREE Offshore Windfarm


Chapter 21 Water Resource and Flood Risk Page 12


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