Tidal Lagoon Swansea Bay Planning, Design & Access Statement: Installation of 275Kv Electricity Cable November 2016
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Tidal Lagoon Swansea Bay Planning, Design & Access Statement: Installation of 275kv electricity cable November 2016 www.tidallagoonswanseabay.com Tidal Lagoon Swansea Bay Plc Document title Planning, Design & Access Statement – Installation of 275kv electricity cable Revision number TLSB-TCPA-275KV CABLE ROUTE-PDAS- Nov 16-1.0 Date 17/11/2016 2 Tidal Lagoon Swansea Plc Planning, Design & Access Statement – Installation of 275kv electricity cable Tidal Lagoon Swansea Bay Plc Table of Contents 1 INTRODUCTION ........................................................................................................ 1 2 SITE DESCRIPTION .................................................................................................... 3 3 THE PROPOSAL ......................................................................................................... 4 4 PROJECT NEED ......................................................................................................... 5 5 DESIGN AND ACCESS CONSIDERATIONS ..................................................................... 8 6 PLANNING POLICY FRAMEWORK ............................................................................. 10 7 MATERIAL CONSIDERATIONS .................................................................................. 17 8 PLANNING ASSESSMENT ......................................................................................... 18 9 PLANNING BALANCE ............................................................................................... 21 10 CONCLUSION ......................................................................................................... 22 3 Tidal Lagoon Swansea Plc Planning, Design & Access Statement – Installation of 275kv electricity cable Tidal Lagoon Swansea Bay Plc 1 INTRODUCTION 1.1.1 This planning, design and access statement has been prepared to support a planning application submitted by Tidal Lagoon Swansea Bay plc (TLSB) for the construction of an underground electricity cable to link the Swansea Bay Tidal Lagoon electricity generating station to the electricity substation at Baglan Bay. 1.1.2 TLSB has developed a way to generate cost effective, predictable and fully renewable power from the tidal range in Swansea Bay, enhancing energy security for Wales (and the UK) allowing important carbon reductions. The Lagoon would harness the 8.5m tidal range of Swansea Bay (average Spring tides) to generate renewable electricity for 14 hours per day, for 120 years, with a net annual output of 400GWh. The works to secure this renewable energy source comprise a Nationally Significant Infrastructure Project (NSIP), which together are referred to as the ‘ TLSB Project’ in this Statement. 1.1.3 The Development Consent Order (DCO) application for the TLSB Project was submitted to the Secretary of State for Energy and Climate Change in February 2014 under the NSIP process. The examination in public was completed in December 2014 and a decision, granting consent, was issued on 9th June 2015. 1.1.4 The development subject of this application, was included in the DCO application submission and was considered as part of the TLSB Project as a whole. A detailed examination of the potential impacts of the construction and appropriate mitigation measures were assessed during the examination. However, the length of the route, from the point where the wall of the Tidal Lagoon meets the land (the Western Landfall) to the substation at Baglan Bay was excluded from the DCO as it was held to be outside the jurisdiction of the Planning Act 2008. 1.1.5 In order to construct the electricity cable (the 275kV Project), planning permission under the Town and Country Planning Act 1990 is therefore required. This Planning, Design and Access Statement (PDAS) has been prepared to support that application. 1.1.6 This statement should be read in conjunction with the Environmental Statement (ES) (Addendum) and Non-Technical Summary which have been submitted as part of this application. 1 Tidal Lagoon Swansea Plc Planning, Design & Access Statement – Installation of 275kv electricity cable Tidal Lagoon Swansea Bay Plc 1.1.7 The TLSB Project was the subject of extensive consultation prior to the submission of the DCO application and the final design was informed by comments from the relevant consultees and the public. 1.1.8 The Project is located across two Local Authority areas, the City and County of Swansea Council (CCSC) to the west and Neath Port Talbot County Borough Council (NPTCBC) to the east. The application is therefore being submitted to both authorities. 2 Tidal Lagoon Swansea Plc Planning, Design & Access Statement – Installation of 275kv electricity cable Tidal Lagoon Swansea Bay Plc 2 SITE DESCRIPTION 2.1.1 The cable route will extend from the western landfall of the proposed lagoon wall, to the substation in Baglan Bay, a total distance of 7.1 km. The physical characteristics of the area in which it is located varies widely, from the industrial area around Swansea Port, which lies to the north of the Project, eastwards past a former BP oil refinery, the land of which has been reclaimed and is currently being transformed through the construction of the Swansea University Bay Campus (SUBC). 2.1.2 To the south and east of the SUBC lies the Crymlyn Burrows SSSI, one of the last sections of the Bay which is largely unmodified by industrial or commercial development. The SSSI supports sand dunes, areas of saltmarsh and a diverse range of coastal species and is a popular area for dog walkers and recreational use. 2.1.3 The eastern boundary of the SSSI is formed by the River Neath and estuary, under which the cable will pass. On the eastern side of the river, there is the Baglan Bay Energy Park and an extensive industrial area within which the Baglan Bay substation is located. Figure 1 – aerial view of site, courtesy of Google maps. 3 Tidal Lagoon Swansea Plc Planning, Design & Access Statement – Installation of 275kv electricity cable Tidal Lagoon Swansea Bay Plc 3 THE PROPOSAL 3.1.1 The electricity produced by the TLSB Project will be transferred to the national electricity transmission system (NETS) via three 275kV cables. The majority of the cable route will be buried in a single excavated trench, approximately 2.5m wide and typically 1m deep. Once the cables are pulled in, the cable surround can be installed with protection cover slabs prior to backfilling and final reinstatement of the ground. 3.1.2 Sections of the route through the SUBC, have the potential to use pre-installed cable ducts and where the cable crosses narrow roads with small verges the use of pre- installed ducts is preferred to avoid impact on traffic resulting from open-cut trenches. The installation of ducts and trench reinstatement would be completed in stages, given the need for excavations and a working area, thereby ensuring minimum disruption. 3.1.3 The cable route will follow an alignment adjacent to the ABP port coastal road, before being routed along and/or parallel to Fabian Way. It will then run behind the footpath in the southern verge to a point opposite the ‘Amazon roundabout’ at the junction with the B4290. From this point it will pass into the Crymlyn Burrows SSSI, crossing it either under or adjacent to an existing tarmac track. 3.1.4 The cable will pass under the River Neath and estuary via a duct formed by horizontal directional drilling, before following road infrastructure and brownfield routes to reach the Baglan Bay substation. 3.1.5 Underground cable joint bays, aproximateley 4.1m wide, will be required approximately every 1000m - 1500m and will be excavated (where required) ideally in verges. 3.1.6 For full details on the proposed construction methodology of the cable route, see the Construction Method Statement provided as part of this application. A Site Location Plan of the cable route corridor is provided as part of this application. 4 Tidal Lagoon Swansea Plc Planning, Design & Access Statement – Installation of 275kv electricity cable Tidal Lagoon Swansea Bay Plc 4 275kV PROJECT NEED 4.1.1 This application seeks permission for the construction of an underground electricity cable associated with the Swansea Bay Tidal Lagoon electricity generating station; a Nationally Significant Infrastructure Project. The development proposed as part of this application is therefore integral to ensuring the delivery of the overall TLSB Project and its importance is therefore nationally significant. 4.1.2 The making of the DCO for the TLSB Project demonstrates its importance in the national interest, and thus this planning application must be afforded the same status and weight in decision making. 4.1.3 The UK government has made clear the urgent need for new energy generating capacity in the Overarching National Policy Statement for Energy (EN-1) and in the National Policy Statement for Renewable Energy (EN-3). 4.1.4 EN-1 states that there is an “urgent need” for new and low carbon energy infrastructure to be brought forward as soon as possible (para. 3.3.15). Such infrastructure is particularly required in the next 10-15 years in order to secure energy supplies that enable the UK to meet its 2050 emissions targets. The role of electricity in decarbonizing the UK energy sector is crucial. 4.1.5 EN-3 reiterates the urgent need for renewable energy projects to form part of a diverse energy mix. It considers that the need for any renewable energy NSIP is already established for the purpose of decision making. 4.1.6 In determining this application, significant