Moray Offshore Renewables Ltd
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EDPR APP Covers 07/07/2012 17:13 Page 13 moray offshore renewables ltd Environmental Statement Technical Appendix 1.3 E - Preliminary Decommissioning Programme Telford, Stevenson, MacColl Wind Farms and associated Transmission Infrastructure Environmental Statement EDPR APP Covers 07/07/2012 17:13 Page 14 Moray Offshore Renewables Limited - Environmental Statement Telford, Stevenson and MacColl Offshore Wind Farms and Transmission Infrastructure This page has been intentionally left blank. Moray Offshore Renewables Limited - Environmental Statement Telford, Stevenson and MacColl Offshore Wind Farms and Transmission Infrastructure Contents Executive Summary ................................................................................................................. 3 1. Introduction ....................................................................................................................... 5 2. Background Information ................................................................................................. 6 2.1 Project Overview ..................................................................................................................... 6 2.2 Project Status ........................................................................................................................ 11 2.3 Site Characteristics ................................................................................................................ 14 2.3.1 Physical Environment .................................................................................................... 14 2.3.2 Biological Environment ................................................................................................. 16 2.3.3 Human Environment ..................................................................................................... 26 3. Description of Items to be Decommissioned ............................................................. 29 3.1 Wind Turbine Generators ..................................................................................................... 29 3.1.1 Turbine Numbers and Site Layout ................................................................................ 31 3.2 Foundations and Substructures for WTGs ............................................................................ 33 3.2.1 Gravity Base Structures ................................................................................................. 34 3.2.2 Jacket Structures ........................................................................................................... 36 3.3 Inter-Array Cabling ................................................................................................................ 37 3.4 Meteorological Mast ............................................................................................................. 38 3.5 Offshore Transmission Infrastructure ................................................................................... 39 3.5.1 AC Offshore Substation Platform .................................................................................. 39 3.5.2 AC/DC Offshore Converter Substation Platforms ......................................................... 40 3.5.3 Foundations and Substructures for AC and AC/DC OSPs .............................................. 40 3.5.4 Inter-Platform Cabling ................................................................................................... 43 3.5.5 Export Cable .................................................................................................................. 43 3.5.6 Onshore Infrastructure ................................................................................................. 44 1.3 E 4. Description of Proposed Decommissioning Measures .............................................. 44 4.1 Decommissioning Considerations ......................................................................................... 44 4.2 Decommissioning Options .................................................................................................... 45 APPENDIX Technical Appendix 1.3 E – Environmental Impact Assessment 1 Moray Offshore Renewables Limited - Environmental Statement Telford, Stevenson and MacColl Offshore Wind Farms and Transmission Infrastructure 4.3 Location of the Decommissioning Sites ................................................................................ 46 4.4 Potential for Phasing and Integration ................................................................................... 46 4.5 Other Potential uses for the Infrastructure .......................................................................... 46 4.6 Proposed Measures for Decommissioning ........................................................................... 46 4.6.1 Complete Removal ........................................................................................................ 47 4.6.2 Partial Removal ............................................................................................................. 48 4.6.3 Left In-Situ ..................................................................................................................... 50 4.7 Proposed Waste Management Solutions ............................................................................. 50 5. Environmental Impact Assessment .............................................................................. 51 6. Sea-bed Clearance ....................................................................................................... 52 7. Restoration of the Sites .................................................................................................. 53 8. Post-decommissioning Monitoring, Maintenance and Management of the Sites53 9. Supporting Studies .......................................................................................................... 54 10. Consultations with Interested Parties ........................................................................... 56 11. Schedule.......................................................................................................................... 57 12. Project Management and Verification ....................................................................... 57 13. Costs ................................................................................................................................. 58 14. Financial Security ........................................................................................................... 58 2 Technical Appendix 1.3 E – Environmental Impact Assessment Moray Offshore Renewables Limited - Environmental Statement Moray Offshore Renewables Limited - Environmental Statement Telford, Stevenson and MacColl Offshore Wind Farms and Transmission Infrastructure Telford, Stevenson and MacColl Offshore Wind Farms and Transmission Infrastructure 4.3 Location of the Decommissioning Sites ................................................................................ 46 Executive Summary 4.4 Potential for Phasing and Integration ................................................................................... 46 In 2012 Moray Offshore Renewables Ltd (MORL) will submit applications for Section 36 4.5 Other Potential uses for the Infrastructure .......................................................................... 46 consents for the Telford, Stevenson and MacColl Offshore Wind Farms with a total capacity of 1,500 MW, located within the outer Moray Firth, Scotland, together with Marine Licence 4.6 Proposed Measures for Decommissioning ........................................................................... 46 applications for the wind farms and the offshore transmission infrastructure. MORL is a joint 4.6.1 Complete Removal ........................................................................................................ 47 venture company owned by EDP Renewables (EDPR) (67 %) and Repsol Nuevas Energias UK (33 %). 4.6.2 Partial Removal ............................................................................................................. 48 4.6.3 Left In-Situ ..................................................................................................................... 50 The Energy Act 2004 requires that MORL prepares and ultimately carries out a Decommissioning Programme for the Telford, Stevenson and MacColl Offshore Wind Farms. 4.7 Proposed Waste Management Solutions ............................................................................. 50 This document constitutes the preliminary Decommissioning Programme for the projects and 5. Environmental Impact Assessment .............................................................................. 51 MORL has included it in the consent applications, thus giving regulatory authorities and key stakeholders an opportunity to comment on draft proposals for how the structures comprising 6. Sea-bed Clearance ....................................................................................................... 52 the wind farms and offshore transmission infrastructure will be decommissioned. 7. Restoration of the Sites .................................................................................................. 53 8. Post-decommissioning Monitoring, Maintenance and Management of the Sites53 The onshore aspects of the Project (i.e. onshore cables and converter stations) and their associated decommissioning requirements fall under the Town and Country Planning 9. Supporting