Environmental Statement Chapter 5 Project Description .Environmental Statement Chapter 5 Project

August 2013

Environmental Statement Chapter 5 Project Description Application Reference: 6.5

DOGGER BANK CREYKE BECK

F-OFC-CH-005 Issue 4 2013 Forewind Chapter 5 Page ii

Document Title Dogger Bank Creyke Beck

Environmental Statement Chapter 5

Project Description

Forewind Document Reference F-OFC-CH-005 Issue 4

Date August 2013

Drafted by Forewind

Checked by Adrian Pattison

Date / initials check AP 05/08/2013

Approved by Mark Legerton

Date / initials approval ML 05/08/2013

Forewind Approval FAC

Date / Reference approval FAC 05/08/2013

DOGGER BANK CREYKE BECK

F-OFC-CH-005 Issue 4 2013 Forewind Chapter 5 Page iii

Title: Dogger Bank Creyke Beck Environmental Statement - Chapter 5 Project Description

Contract No. (if applicable) (Onshore / Offshore)

Document Number: F-OFC-CH-005

Issue No: 4

Issue Date: 05-Aug-13

Status: Issued for 1st. Technical Review Issued for 2nd. Technical Review

Issued for PEI3 Issued for Application Submission

Prepared by:

Forewind Engineering & Electrical Teams

Checked by:

Adrian Pattison / Sophie Barrell

Approved by: Mark Legerton

Signature / Approval (Forewind)

Mark Legerton

Approval Date: 05-Aug-13

Revision History

Date Issue No. Remarks / Reason for Issue Author Checked Approved

31/10/2012 1 Draft for first technical review Forewind ER AP

21/01/2013 2 Draft for second technical review Forewind ER ML

21/03/2013 3 Issued for PEI3 Forewind AP ML

05/08/2013 4 Issued for Application Submission Forewind AP ML

DOGGER BANK CREYKE BECK

F-OFC-CH-005 Issue 4 2013 Forewind Chapter 5 Page iv

Contents

1 Introduction ................................................................................................................... 1

1.1 Overview ............................................................................................................. 1

1.2 Project Development Envelope - Flexibility ......................................................... 1

1.3 Project Description - Summary ........................................................................... 2

1.4 Project Capacities & Overplanting ...................................................................... 8

1.5 Project Output & Electricity Generation ............................................................... 8

1.6 Links to the Development Consent Order ........................................................... 9

1.7 Relevant Guidance ........................................................................................... 11

1.8 Consultation ...................................................................................................... 14

2 Site Description ........................................................................................................... 21

2.1 Site Location ..................................................................................................... 21

2.2 Offshore Site Description .................................................................................. 36

2.3 Onshore Site Description .................................................................................. 37

3 Offshore Project Components ..................................................................................... 40

3.1 Wind Turbines ................................................................................................... 40

3.2 Offshore Structure Foundations ........................................................................ 50

3.3 Protection Against Foundation Scour & Subsea Damage ................................. 78

3.4 Grout ................................................................................................................. 82

3.5 Seabed Preparation, Drilling & Disposal of Spoil Arisings ................................ 83

3.6 Piling & Noise Modelling ................................................................................... 88

3.7 Offshore Platforms ............................................................................................ 97

3.8 Offshore Cables .............................................................................................. 104

3.9 Offshore Cable Installation and Removal ........................................................ 110

3.10 Remedial Cable Protection ............................................................................. 118

3.11 Offshore Cable & Pipeline Crossings .............................................................. 124

3.12 Offshore Electromagnetic Fields ..................................................................... 129

3.13 Meteorological Monitoring Stations ................................................................. 133

3.14 Vessel Moorings ............................................................................................. 136

4 Onshore Project Components ................................................................................... 139

4.1 Cable Landfall ................................................................................................. 139

DOGGER BANK CREYKE BECK

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4.2 Onshore Cables .............................................................................................. 142

4.3 Onshore Cable Routes ................................................................................... 145

4.4 Cable Installation ............................................................................................ 149

4.5 Onshore Construction ..................................................................................... 163

4.6 Onshore Converter Station ............................................................................. 174

4.7 Expected Construction Traffic ......................................................................... 178

5 Offshore Project Layouts ........................................................................................... 179

5.1 Wind Farm Layouts ......................................................................................... 179

5.2 Wind Turbine Array Layout Rules ................................................................... 180

5.3 Layout of Other Offshore Project Components ............................................... 187

5.4 Wind Turbine Spacing ..................................................................................... 187

5.5 Proximity to Existing Infrastructure .................................................................. 188

6 Project Life Cycle ...................................................................................................... 190

6.2 Pre-Construction Engineering Surveys ........................................................... 190

6.3 Construction .................................................................................................... 191

6.4 Commissioning ............................................................................................... 204

6.5 Operation & Maintenance ............................................................................... 205

6.6 Replanting/Life Extension ............................................................................... 214

6.7 Decommissioning ............................................................................................ 215

7 Health & Safety and Environmental Management .................................................... 220

7.1 Health and Safety ........................................................................................... 220

7.2 Waste Management ........................................................................................ 220

7.3 Hazardous Material ......................................................................................... 222

7.4 Safety Zones and Other Potential Navigation Safety Measures ..................... 224

7.5 Navigation and Aviation Safety Markings ........................................................ 225

DOGGER BANK CREYKE BECK

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Table of Tables

Table 1.1: Summary of key project components ........................................................... 6

Table 1.2: Key project capacity figures (per individual project) ..................................... 8

Table 1.3: NPS requirements ...................................................................................... 11

Table 1.4: Summary of key consultation and issues raised by consultees.................. 15

Table 2.1: Key Zone characteristics ............................................................................ 21

Table 2.2: Dogger Bank Creyke Beck A key project characteristics............................ 23

Table 2.3: Dogger Bank Creyke Beck A boundary co-ordinates ................................. 24

Table 2.4: Dogger Bank Creyke Beck B key project characteristics............................ 24

Table 2.5: Dogger Bank Creyke Beck B boundary co-ordinates ................................. 25

Table 2.6: Export cable corridor key co-ordinates (major vertices) ............................. 28

Table 2.7: Temporary work area dimensions