Triton Knoll Offshore Limited

TRITON KNOLL ELECTRICAL SYSTEM

Environmental Statement

Volume 1

Chapter 1: Introduction

April 2015, Revision A Document Reference: 6.2.1.1 Pursuant to: APFP Reg. 5(2)(a) Triton Knoll Offshore Wind Farm Ltd Triton Knoll Electrical System Environmental Statement - Volume 1

Copyright © 2015 Triton Knoll Offshore Wind Farm

Limited

All pre-existing rights reserved. Triton Knoll Offshore Wind Farm Limited

Triton Knoll Electrical System Liability In preparation of this document Triton Knoll Offshore Wind Farm Limited (TKOWFL), a joint venture between RWE Environmental Statement Innogy UK (RWE) and Statkraft UK, subconsultants working on behalf of TKOWFL have made reasonable efforts to Volume 1: Chapter 1 – Introduction ensure that the content is accurate, up to date and complete for the purpose for which it was prepared. Neither TKOWFL nor their subcontractors make any warranty as to the April 2015 accuracy or completeness of material supplied. Other than any liability on TKOWFL or their subcontractors detailed in the contracts between the parties for this work neither TKOWFL or their subcontractors shall have any liability for any loss, damage, injury, claim, expense, cost or other

Drafted By: GoBe Consultants Ltd consequence arising as a result of use or reliance upon any information contained in or omitted from this document. Approved By: Kim Gauld-Clark Any persons intending to use this document should satisfy themselves as to its applicability for their intended purpose. Date of Approval April 2015 Where appropriate, the user of this document has the

Revision A obligation to employ safe working practices for any activities referred to and to adopt specific practices appropriate to local conditions.

Triton Knoll Offshore Wind Farm Ltd Auckland House Triton Knoll Offshore Wind Farm Limited have been awarded EU TEN-E funding to support the development of the Triton Great Western Way Knoll Offshore Wind Farm Electrical System located in both Swindon UK Territorial waters and the UK’s Exclusive Economic Zone. Wiltshire, SN5 8ZT The funding which is to be matched will support a number of surveys, engineering reports, and environmental impact T +44 (0)845 720 090 assessment studies for the Triton Knoll Electrical System. The studies will form part of the formal documentation that F +44 (0)845 720 050 will accompany the Development Consent Order which will I www.rweinnogy.com be submitted to the Planning Inspectorate. The sum of €1,159,559 has been granted and the process to reclaim this funding is ongoing. www.rweinnogy.com/tritonknoll [email protected]

ii Triton Knoll Offshore Wind Farm Ltd Triton Knoll Electrical System Environmental Statement - Volume 1

Table of Contents 1 INTRODUCTION ...... 1-1 Overview ...... 1-1 The Applicant ...... 1-1 Project background ...... 1-2 Background to the Environmental Impact Assessment ...... 1-6 Overview of project details ...... 1-6 The Environmental Impact Assessment team ...... 1-7 Consultation and the purpose of the ES ...... 1-7 Structure of the Environmental Statement ...... 1-8 Document availability ...... 1-9 References ...... 1-9

iii Triton Knoll Offshore Wind Farm Ltd Triton Knoll Electrical System Environmental Statement - Volume 1

1 INTRODUCTION 1.6 Both partner companies are committed to developing and operating wind farms and hydro plant to generate sustainable and are highly experienced in offshore Overview wind farm development. 1.7 RWE Innogy UK currently operates 19 hydroelectric schemes and 26 offshore and 1.1 Triton Knoll Offshore Wind Farm Limited (TKOWFL) is submitting an application to the onshore wind farms in the UK. In 2004 they completed the construction of the UK’s Planning Inspectorate (PINS), on behalf of the Secretary of State for and first major offshore wind farm, North Hoyle, off the coast of North . Climate Change for a Development Consent Order (DCO) for the Triton Knoll Electrical System (the proposed development) under the Planning Act 2008. The • RWE Innogy UK’s offshore projects include: Triton Knoll Electrical System would connect the consented Triton Knoll Offshore Wind • North Hoyle, North Wales – 30 turbines (60 megawatts (MW) capacity); Farm (TKOWF) array to the National Grid substation at Bicker Fen, to the south-west • , North Wales – 25 turbines (90 MW capacity), operational since 2009; of Boston, and would comprise offshore and onshore export cable circuits, landfall infrastructure, an onshore intermediate electrical compound and an onshore • Greater Gabbard, Suffolk – 140 turbines (504 MW capacity), operational since substation. 2012. This is a 50% joint venture with Scottish and Southern Energy; and 1.2 An Environmental Impact Assessment (EIA) has been undertaken for the proposed • Gwynt y Mór, North Wales – 160 turbines (576 MW capacity), first generation development in accordance with the Infrastructure Planning (Environmental Impact achieved in August 2013 and the wind farm becoming fully operational in early Assessment) Regulations 2009 (the EIA Regulations). This Environmental Statement 2015. (ES) provides the findings of the EIA process for the proposed development. The • Galloper, Suffolk – number of turbines to be determined for up to 350 MW purpose of the ES is to provide a source of information for stakeholders regarding capacity; offshore construction scheduled to start in 2016. potential environmental issues that may result from the development during its construction, operation and decommissioning, as required by the Planning Act 2008, 1.8 Statkraft is a leading company in internationally and Europe’s largest ensuring the Planning Inspectorate and Secretary of State have sufficient information generator of renewable energy. The Group produces hydropower, , gas on the likely significant effects of the proposed development to inform the decision power and district heating and is a global player in energy market operations. Statkraft making process. has 3,700 employees in more than 20 countries. 1.3 Further detail pertaining to the legislation relevant to the proposed development and 1.9 Since 2006, Statkraft has invested £1.4 billion in the UK's renewable energy the EIA is presented in Volume 1: Chapter 2; Consents, Policy and Legislation. infrastructure and provided 2.5 GW of renewable energy Power Purchase Agreements (PPA's). Statkraft’s renewable energy generation assets have a capacity of 900 MW The Applicant and the company is the majority owner and operator of three onshore wind farms, a major shareholder in two offshore wind farms, and owns and operates the largest 1.4 TOWFL is a joint venture between two leading international energy companies; RWE hydropower plant in and Wales. Innogy UK Ltd and Statkraft UK. RWE Innogy UK Ltd is the UK subsidiary of the 1.10 Statkraft entered the offshore wind sector in 2009, and has since been working German renewable energy company RWE Innogy (part of RWE AG), a company with towards implementing its strategy to become a lead developer in all phases of the a strong and diversified position in renewable energy development. Statkraft UK is a project life cycle. In 2014 Statkraft took over O&M responsibility for the 317MW subsidiary of Statkraft Group, Europe’s largest generator of renewable energy and is Sheringham Shoal offshore wind-farm. In July 2014 Statkraft, in partnership with the leading power company in Norway. Statoil (as operator) and Masdar, made an investment decision on the 402MW 1.5 TKOWFL pools the renewable energy expertise of the RWE Group and Statkraft, Dudgeon offshore wind farm in the Greater Wash. operating in Germany, the , Spain, Poland, Italy, the Netherlands, Scandinavia and beyond Europe.

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1.11 RWE Innogy UK and Statkraft UK are part of the Consortium currently surveys. TKOWFL also undertook consultation with statutory and non-statutory developing the proposed Creyke Beck and Teesside Offshore Wind Farms within the consultees and the general public to determine the preferred form of development for Zone1 (combined generating capacity of up to 4.8 GW). the Triton Knoll Electrical System necessary to connect the offshore wind farm with the onshore National Grid substation near Bicker Fen. Project background 1.17 Following detailed technical and commercial optimisation studies undertaken by 1.12 The consented TKOWF array is located approximately 33km (20.5 miles) east of the TKOWFL, together with discussion with the Crown Estate, in January 2014 it was coast, and comprises a Nationally Significant Infrastructure Project (NSIP) decided to reduce the overall generating capacity of the scheme to a maximum of 900 under section 15(3) of the Planning Act 2008. An application for a DCO for TKOWF MW. This is considered to make better use of the site within the TKOWF array’s was submitted to PINS (on behalf of the Secretary of State) in accordance with the consented boundary. requirements of the Act in January 2012. 1.18 The connection for TKOWF requires offshore cables to be laid under the seabed, 1.13 The Secretary of State granted a DCO for the TKOWF array on 12th July 2013; and underground onshore cables and above ground installations within two local authority the Order Limits for that array are shown on Figure 1-1. areas. Consents and licences for those cables and installations would have required an application for a Marine Licence to the Marine Management Organisation (MMO) 1.14 The development consent granted by the TKOWF DCO comprises the offshore array and two separate applications under the Town and Country Planning Act to the two of up to 288 turbines with a maximum generating capacity of up to 1200MW together relevant Local Planning Authorities (LPAs) (East Lindsey District Council (ELDC) and with associated intra-array cabling and up to four Offshore Substation Platforms Boston Borough Council (BBC)). In order to streamline the planning process and bring (OSPs). The DCO application did not include associated electrical infrastructure such it within a single consent and decision-maker, TKOWFL applied for a direction from the as offshore export cables, onshore cables, and associated substations necessary to Secretary of State under section 35 of the Planning Act 2008 that the Triton Knoll transport power onshore for connection to the National Grid. It is this electrical system Electrical System works should be treated as development for which development to which the current application, and therefore this ES, refers. consent is required. Further detail relating to the legislation relevant to this process is 1.15 TKOWFL was initially offered a grid connection point by National Grid Electricity presented in Volume 1: Chapter 2; Consents, Policy and Legislation. Transmission (NGET) at a proposed new substation at (Lincolnshire) in April 1.19 The Secretary of State confirmed on 14th November 2013 that the Electrical System 2009, which was accepted by TKOWFL in July 2009. However, in December 2010, works should also be treated as development for which development consent is NGET advised TKOWFL of the need to undertake a ‘strategic review’ of the Triton required. TKOWFL is therefore submitting an application under the Planning Act 2008 Knoll grid connection. Due to the uncertainties over timescales for completion of the for a DCO for the Triton Knoll Electrical System. The proposed development boundary NGET strategic review and the extensive work already undertaken on the offshore for the Triton Knoll Electrical System is presented in Figure 1-1 and Figure 1-2 array, TKOWFL decided in March 2011 to progress the offshore array application (illustrating the development offshore and onshore, respectively)2. separately from the Electrical System. Consultation for the onshore part continued in order to explain the decision of separating the project into two packages and to ensure 1.20 TKOWFL submitted a scoping report for the Triton Knoll Electrical System to PINS in sufficient information was captured in the Cable Statement for the DCO application for March 2014 under the Planning Act 2008. The Secretary of State’s formal scoping th the TKOWF offshore array. A new connection offer was made by NGET to connect at opinion was received on 5 May 2014 (The Planning Inspectorate, 2014). the existing substation at Bicker Fen in January 2012.

1.16 Following receipt of the revised grid connection offer in January 2012, TKOWFL carried out various technical and environmental studies, including site searches and

2 It should be noted that there are areas of land within the Order Limits which are outside the proposed development boundary (onshore) depicted in Figure 1-2 as no development or works are proposed within such areas. These include existing tracks that may be used to gain access to the cable route in order to undertake pre-construction works and access for operations and maintenance activities. All 1 The Offshore Wind Farms within the Dogger Bank Zone are being developed by Forewind, a works will occur within the proposed development boundary. A series of figures is presented in consortium of four energy companies, including RWE Innogy UK and Statkraft UK. Appendix 1.1 to illustrate the small differences between these separately defined areas.

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1.21 At the time of submission of the March 2014 scoping report, TKOWFL anticipated that the proposed development would be delivered as either one or two projects, such that each project could be constructed by TKOWFL (either with or without a development partner), or by a third party. TKOWFL has since decided to progress the application for the Triton Knoll Electrical System as a single project. 1.22 TKOWFL produced Preliminary Environmental Information (PEI) for the Triton Knoll Electrical System in October 2014 in support of the duty to consult the local community under section 47 of the Planning Act 2008. The information was made available at public exhibitions as well as through the project website and in local libraries and Council offices within the region during the consultation period (15 October to 19 November 2014). The PEI, in the form of a draft ES, also supported formal consultation requirements with statutory consultees (section 42), landowners (section 44) and advertised in accordance with section 48 of the Act. 1.23 The consultation responses received have been taken into consideration and, where appropriate and practicable, have been used to amend and improve the project and this final ES. Further detail pertaining to the scoping and consultation undertaken is presented in Volume 1: Chapter 3 Approach to EIA.

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© Crown copyright, All rights reserved. 2014 License No. EK001-20140601. Contains Ordnance Survey data © Crown copyright and database right 2014. Not to be used for navigation. Thorpe Culvert 520000 530000 540000 550000 560000 Legend Proposed Development Boundary Extent of works required for West the Triton Knoll Electrical Lindsey System within the existing District Bicker Fen substation compound Intermediate Electrical 0

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REV 01 o D © Crown copyright, All rights reserved. 2014 License No. EK001-20140601. Contains Ordnance Survey data © Crown copyright and database right 2014. Not to be used for navigation. Triton Knoll Offshore Wind Farm Ltd Triton Knoll Electrical System Environmental Statement - Volume 1

• Background to the Environmental Impact Assessment Up to six offshore export cable circuits – to transmit the high voltage alternating current (HVAC) electricity from the offshore substations to the transition joint 1.24 The electrical system for delivery of power from TKOWF to the National Grid has been bays at the landfall; the subject of previous technical feasibility studies and a considerable amount of • Landfall infrastructure just north of , Lincolnshire – including background study. The background studies have included consideration of technical transition joint bays which house the connection between the offshore cables options, cable alignment and substation location studies, desktop constraints mapping, and the onshore cables; baseline environmental surveys, site visits and consultation. • Up to six onshore export cable circuits – to transmit the HVAC electricity from the 1.25 Previous consultation work included the submission of two separate requests for transition joint bays at the landfall to the proposed Triton Knoll Substation via the scoping opinions, for the substation (made to BBC) and for the Intermediate Electrical Intermediate Electrical Compound; Compound (made to ELDC) in relation to an earlier scheme. ELDC issued its scoping nd th • An Intermediate Electrical Compound near to Orby Marsh – to provide response on 22 August 2013 and BBC on 28 August 2013. These previous scoping compensation for reactive power to allow more efficient transmission to minimise submissions and opinions have been superseded by the current scoping report submitted to the Secretary of State in March 2014 and the Secretary of State’s formal losses; scoping opinion of 5th May 2014. All references to ‘scoping report’ or ‘scoping opinion’ • A substation near to the existing Bicker Fen NGET Substation – to step-up the in this ES therefore refer to the most recent scoping information, unless expressly voltage to the voltage used by the National Grid and provide additional stated otherwise. compensation for reactive power built up over the export transmission; and 1.26 The DCO application for the Triton Knoll Electrical System is discussed in detail in • Up to four onshore export cable circuits (400 kV) – to transmit the HVAC Volume 1 Chapter 3; Consents, Policy and Legislation. In summary, it comprises electricity from the proposed Triton Knoll Substation to the existing National Grid details of the development proposals and is accompanied by an Environmental substation at Bicker Fen, Boston. Statement (ES) prepared in accordance with the EIA Regulations. The ES will report • “Unlicensed Works”3 which are the erection and installation of relevant the findings of the EIA. equipment within the footprint of the existing NGET substation to facilitate the 1.27 As TKOWFL is submitting a single DCO application for the Triton Knoll Electrical connection into the National Grid. . System, the EIA covers all elements of the proposed development. The EIA adopts a 1.30 The proposed development boundary for the Triton Knoll Electrical System is ‘Rochdale Envelope’ approach and defines the ‘realistic worst case’ for assessment illustrated in Figure 1-1 and Figure 1-2 (illustrating the development offshore and purposes. The Rochdale Envelope approach is explained further in Volume 1: Chapter onshore, respectively). TKOWFL’s proposals include the Triton Knoll Electrical 3 Approach to EIA. System up to the point of connection into the grid interface point at the National Grid Overview of project details substation near Bicker Fen. Further detailed illustrations of the offshore and onshore route are presented in Volume 2 Chapter 1 and Volume 3 Chapter 1 (Project 1.28 The following paragraphs provide a brief overview of the key components of the Triton Description for the offshore and onshore components, respectively). Knoll Electrical System. Volume 2 Chapter 1 and Volume 3 Chapter 1 (offshore and 1.31 Any works on the National Grid substation near Bicker Fen that may be required to onshore Project Description, respectively) of the ES, which present the project connect the power produced by TKOWF will be consented, constructed and operated description for the offshore and onshore components respectively, describe the proposed development in more detail and include consideration of all temporary and permanent works required for the construction, operation and decommissioning of the Triton Knoll Electrical System.

1.29 The components of the Triton Knoll Electrical System, which will be needed to connect 3 “Unlicenced works” are electrical works needed to connect Triton Knoll to the National Grid substation TKOWF to the National Grid, would comprise: at Bicker Fen that National Grid is not required pursuant to its transmission licence to carry out itself.

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4 by National Grid (the ‘Enabling Works’) . National Grid has not yet completed the Chapter/Specialism Consultant engineering studies necessary to define the Enabling Works required at their existing Terrestrial Ecology Thomson Ecology Bicker Fen substation. However, it is anticipated that these works will only involve Land Use, Agriculture and Soils RSK Group Ltd modifications to the existing infrastructure within the existing site boundary. Geology and Ground Conditions RSK Group Ltd The Environmental Impact Assessment team Hydrology and Flood Risk H R Wallingford 1.32 The Triton Knoll Electrical System development team responsible for the production of Historic Environment RSK Group Ltd this ES has been led by RWE Innogy UK, with the assistance of lead EIA consultants Traffic and Access RSK Group Ltd GoBe Consultants Ltd and RSK. Table 1.1 identifies the organisations contributing to Air Quality RSK Group Ltd the relevant sections of the assessment. Noise and Vibration RSK Group Ltd / Hoare Lea Acoustics Table 1-1: The EIA project team Chapter/Specialism Consultant Consultation and the purpose of the ES

1.33 TKOWFL have undertaken informal consultation with statutory and non-statutory Lead EIA Consultant GoBe Consultants Ltd consultees in the development of the Triton Knoll Electrical System onshore and Marine Physical Environment ABP Marine Environmental Research Ltd offshore components since 2012. Details of consultations that have been undertaken Marine and Intertidal Ornithology GoBe Consultants Ltd in the preparation of the application are set out in a separate Consultation Report, in compliance with the application procedures under the Planning Act for a DCO. The Subtidal and Intertidal Ecology GoBe Consultants Ltd, Precision Marine Consultation Report (Application Document 5.1) forms part of this application for DCO Survey Ltd. consent alongside this ES. Fish and Shellfish Ecology GoBe Consultants Ltd 1.34 This ES has been prepared to provide information about the Triton Knoll Electrical Marine Mammals GoBe Consultants Ltd System and the likely significant effects associated with the construction, operation Nature Conservation GoBe Consultants Ltd and decommissioning phases of the proposed project, and where appropriate identify Commercial Fisheries Precision Marine Survey Ltd/ GoBe measures to prevent, reduce or offset such impacts where reasonably possible. Consultants Ltd 1.35 The Department for Communities and Local Government (DCLG) 2013 guidance on Shipping and Navigation Strategic Marine Services Ltd pre-application consultation advises that applicants should include sufficient Other Marine Users GoBe Consultants Ltd information ‘...to enable consultees to develop an informed view of the project’ (paragraph 73). Marine Historic Environment Headland Archaeology Landscape and Visual RSK Group Ltd 1.36 The PEI, in the form of a draft ES, was produced in October 2014 and consultation carried out in accordance with the requirements of the Planning Act 2008. Under the Socio-economics, Tourism and RSK Group Ltd, Regeneris Act the applicant is under a duty to consult with the local community, prescribed Recreation persons, relevant local authorities and affected landowners, and under Section 45(3) to provide documents to those persons for the purpose of that consultation.

1.37 As part of the consultation process, a range of communications tools have been used

to engage with stakeholders and communities, including newsletters, public exhibition 4 National Grid Electricity Transmission (NGET) is responsible for undertaking work at the existing events, through the project website and through provision of documents at local substation to facilitate connection of the TKOWF. These works are referred to as “Enabling Works”. Once the Enabling Works have been completed TKOWFL will be able to populate the National Grid access points. connection bays and connect the 400 kV cables (the’ Unlicensed Works’)

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1.38 Responses received during consultation on the PEI have been reviewed and analysed 6 Marine Mammals to: 7 Nature Conservation • Ensure TKOWFL has properly considered all the potential impacts of the proposal; 8 Commercial Fisheries • Consider and take account, where appropriate, of feedback and responses 9 Shipping and Navigation received as TKOWFL progresses the proposal towards application submission; and 10 Other Marine Users • Produce a consultation report to accompany the application for a DCO to PINS. 11 Marine Historic Environment 1.39 This ES provides details on known baseline conditions using information collated to 12 Inter-related Effects date and then sets out potential impacts and mitigation measures. This document therefore presents environmental information gathered by TKOWFL through 13 Conclusions and Summary of Key Issues consultation, site-specific survey and/ or desk study. Within relevant technical chapters, a summary of consultation responses received to date are recorded Volume 3: Onshore Chapters alongside how and where the responses have been addressed. 1 Project Description Structure of the Environmental Statement 2 Landscape and Visual

1.40 Table 1-2 provides a breakdown of the Chapters within the ES. 3 Socio-Economics, Tourism and Recreation Table 1-2: Structure of the Environmental Statement 4 Terrestrial Ecology Chapter No. Chapter title/ parameter 5 Land Use, Agriculture and Soils Volume 1: Introductory Chapters 6 Geology, Hydrogeology and Ground Conditions 1 Introduction 7 Hydrology and Flood Risk 2 Consents, Policy and Legislation 8 Historic Environment 3 Approach to Environmental Impact Assessment 9 Traffic and Access 4 Site Selection and Alternatives 10 Air Quality Volume 2 Offshore Chapters 11 Noise and Vibration 1 Project Description 12 Inter-relationships 2 Marine Physical Environment 13 Conclusions and summary of key issues 3 Marine and Intertidal Ornithology Volume 4: Offshore Annexes 4 Subtidal and Intertidal Ecology Volume 5: Onshore Annexes 5 Fish and Shellfish Ecology

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Document availability

1.41 A Non- Technical Summary (NTS) document has been produced, which describes the project, its location and the likely environmental effects in non-technical language. The ES, NTS and other application documents can be viewed and downloaded free of charge from the Planning Inspectorate website: http://infrastructure.planningportal.gov.uk/projects/east-midlands/triton-knoll-electrical- system/ 1.42 Copies of the ES on CD can be requested by post, addressed to: FREEPOST RTBK-ABSH-TGLU, Triton Knoll Offshore Wind Far Ltd RWE Innogy UK, Trigonos Windmill Hill Business Park Whitehill Way SWINDON SN5 6PB 1.43 Or by email at: tritonknoll@.com 1.44 A charge will be made for paper copies.

References

• Department of Communities and Local Government (January 2013) ‘Planning Act 2008: Guidance on the pre-application process’. • The Planning Inspectorate (2014) Scoping Opinion. Proposed Triton Knoll Electrical System http://infrastructure.planningportal.gov.uk/projects/east- midlands/triton-knoll-electrical-system/ • RWE Innogy UK Ltd (March 2014) ‘Triton Knoll Offshore Wind Farm Electrical System Environmental Impact Assessment Scoping Report: Volume 1 Chapters and Appendices’. • RWE Innogy UK Ltd (March 2014) ‘Triton Knoll Offshore Wind Farm Electrical System Environmental Impact Assessment Scoping Report: Volume 2: Figures’.

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