East Anglia ONE Offshore Windfarm Construction Artificial Lighting Emissions Plan
September, 2016
HDD-08 HDD-09 HDD-10 HDD-11
HDD-12 HDD-13
HDD-14 HDD-15
HDD-16 HDD-17 HDD-18 HDD-19 HDD-20
23.
Cat 1 Cat 2 Cat 2 Cat 1
Cat 2
A12 Trunk Road Top Street Sandy Lane
Martlesham Creek and
Network Rail tracks south of Woodbridge
Waldringfield Road
Cat 2 Watercourse east of Howe’s Farm
Cat 1 Cat 2
Cat 1 Cat 2 Cat 1 Cat 2 Cat 2
Kirton Creek
Sewage works outfall watercourse
River Deben Queen’s Fleet
Landfall, Bawdsey Bramford Road
Grundisburgh Road
70 50
550 50
700 70
1000 60 50
55 55
110 55
55 55
160 55 55
The HDD technique is expected to be used at the majority of locations on the route where a trenchless method is required. This involves creating an access pit on either side of the obstacle to facilitate the installation of the drilling equipment and allow drilling under the obstacles, at an appropriate depth allowing the installation of the ducts. The HDD sites will have two access points, one either side of the HDD location, the drilling rig will be positioned on one side of the feature with ducting placed at the opposite side ready to be pulled back through the opening on completion of drilling.
24.
Once the cable duct installation is completed then works will commence on the installation of the EA ONE cables within the pre-installed ducting system. As the onshore cabling typically comes on drums of up to 1,300m in length, jointing bays will be required along the cable route to join each section of cable together. These jointing bays, approximately 10m long x 5m wide x 5m deep, will be constructed at regular intervals along the onshore cable route to allow cable pulling and jointing at a later stage. The joint bay with be excavated to size and a concrete poured floor with concrete or blockwork walls surround will be installed and topped with concrete slabs to leave ground cover to a depth of 1.1m.
25.
Further details on the construction methodology for the onshore cable route are presented in the Cable Method Statement (EA1-CON-R-IBR-021238).
3.1.3 Onshore Substation 26.
The EA ONE onshore substation will be located within a fenced compound (150m by 190m) to the north of the existing National Grid Bramford Substation. The substation will contain electrical equipment including power transformers, switchgear, reactive compensation equipment, harmonic filters, cables, control buildings and other associated equipment, which will largely be outside with a number of the components being within the buildings.
27.
The construction of the substation will include a number of key stages; include enabling works, foundations and building construction and equipment installation and commissioning. The enabling will include grading and earthworks to remove any unsuitable materials from the substation area and provide a level platform at an elevation of 56m AOD.Where possible, the materials excavated will be reused on site as engineering fill or landscaping depending on material properties. The enabling works will also include the construction of the main concrete access road.
28.
Following the completion of the site grading, works will commence of the excavations for foundation for the building and trenches to accommodate electrical infrastructure and installation of the drainage networks.
29.
The building is largely comprised of steel and cladding materials, with brick/blockwork at the base. The structural steelwork will be fabricated and prepared off site and delivered to site for erection activities using cranes. The composite cladding panels (e.g. Kingspan) will be delivered to site ready to erect and be fixed to the steelwork.
165 90 90
650
120 55 50
160
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