East Anglia ONE Offshore Windfarm Landscape Management PlanWork No 38 to 41
August, 2016
25.
The landscape scheme that will be delivered is illustrated in the Landscape General Arrangement Drawings presented in Appendix 1 to 3 and an illustrative plan of the landscape scheme is presented in Appendix 12. The key proposals illustrated in these drawings are summarised as follows:
Hedgerows and woodland blocks to provide visual screening which relate to local landscape context.
In order to integrate the new woodland blocks within the landscape, mixed native species will be used, with some areas defined to be ‘core’ or ‘edge’ woodland areas.
Some areas of woodland will be planted with faster growing native and non-native woodland species (for quicker visual screening and to act as a “nursery” crop).
The size and location of woodland blocks respond to technical constraints. New hedgerows will be planted to supplement the woodland framework around the substation. Earthworks bunding around the western and southern perimeter of the substation will have natural looking, gentle slopes where possible (1:5 to 1:20) when looking towards substation.
Earthworks bund to the west of the substation will be planted with trees to provide additional screening. A concrete access road into the substation will be constructed and designed to meet the structural bearing capacity for the intended equipment.
The access road is framed by hedges and woodland blocks to create visual separation from the existing bridleway and the access road into the National Grid substation.
Species rich grassland areas will be established to provide a low maintenance ground cover which also enhances the local biodiversity in areas that are not to be returned to agricultural use or planted as woodland.
Existing agricultural land use will be retained in other areas with arable fields, such as to the east between Bullenhall Farm and the Bramford NG substation.
A SuDS attenuation basin with permanent pond and associated open swales where technical and visual mitigation constraints allow.
Amenity grasses will be used immediately next to the access road and perimeter foot track around the substation. Additional ecological mitigation where deemed appropriate and necessary.
26.
Throughout the following paragraphs please refer to the three Landscape General Arrangement (GA) drawings that illustrate these proposals:
Appendix 1 Hard Landscape General Arrangement (OPEN_150796_EastAng_H001). Appendix 2 Soft Landscape General Arrangement (OPEN_150796_EastAng_S001). Appendix 3 Earthworks General Arrangement (OPEN_150796_EastAng_E001).
27. In addition, further details of the proposals are shown in the following Typical Construction Detail plans:
Appendix 4 Typical Construction Detail: Surfaces (EA1-GRD-DG-OPEN-796_D001). Appendix 5 Typical Construction Detail: Fencing (EA1-GRD-DG-OPEN-796_D002). Appendix 6 Typical Construction Detail: Planting (EA1-GRD-DG-OPEN-796_D003). Appendix 7 Typical Construction Detail: Plant Schedules (EA1-GRD-DG-OPEN-796_D004 and EA1-GRD-DG- OPEN-796_D005).
Appendix 13 Sustainable Drainage System Detail (EA1-GRD-DG-OPEN-796_D006). 4.2 Tree planting and cultivation 28.
A woodland and hedgerow framework will be established around the substation, with the key elements of these landscape proposals summarised as follows:
Plant species will be mixed native, ideally sourced from local suppliers and nurseries. Limited numbers of non-native tree species will be planted as part of the mix for quicker visual screening.
Transplant sizes vary in height, being in the range of 60-80cm to 175-200cm, depending on species and typical availability. Some trees are specified at 300-350cm (for example the Betula pendula in the WM3 Screening mix to contribute towards earlier visual screening of the development).
Ground cultivation and preparation of the existing agricultural fields to receive the tree planting; this will include cross-ripping the fields to a depth of at least 600mm.
East Anglia ONE – EA1-CON-F-GBE-008554
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