opportunity to establish that no other Schedule 1 bird species have become established as breeding species along or adjacent to the proposed cable route. Should the presence of additional Schedule 1 species be confirmed during the pre-construction surveys, further targeted mitigation would be proposed and agreed with the relevant consultees.
1.5 Embedded Mitigation
21. The onshore cable route and the methods used to install the cables have been carefully chosen and designed to reduce the potential for significant impacts on ecological receptors. As a consequence a level of mitigation is already built in to the project and these are classed as embedded mitigation. Such embedded mitigation can enable some potential impacts to be avoided completely.
22. The construction operation has a range of measures already embedded within its operational procedures to avoid significant disturbance to breeding and non-breeding birds. This includes the requirement to follow the [Outline] Code of Construction Practice (CoCP) containing, amongst other measures:
A Noise and Vibration Plan designed to minimise and mitigate noise and vibration emissions; and
An Artificial Light Emissions Management Plan designed to manage emissions from artificial light sources.
23. A qualified ECoW will be employed to oversee all construction works in sensitive habitats. Details of the role and actions of the ECoW are given below.
24. Horizontal Directional Drilling (HDD) has been selected as the method of cable duct installation to pass under larger watercourses and wetland areas. This includes the Deben Estuary known to be used by concentration of feeding and roosting Brent Geese and Avocets, Martlesham Creek known to have Cetti’s Warbler territories in marshy scrub adjacent to it and the Mill River and marshy scrub south of Hemley known to have Cetti’s Warbler territories and also supports one pair of Marsh Harriers (nesting was not confirmed here). The use of HDD avoids the localised habitat damage and disturbance that results from the open trench construction method.
25. The HDD operation has a range of measures already embedded within its operational procedures to avoid significant disturbance to breeding and non-breeding birds. These include:
At all HDD sites the measures in the Noise and Vibration Plan will be applied.
At the HDD operational sites constructing the crossings of the Deben Estuary and the Martlesham Creek the measures in the Artificial Light Emissions Management Plan will be applied.
EcMP: Deben Estuary SPA & Schedule 1 Birds Page 5
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