ENERGY WORKING FOR BRITAIN FOR WORKING ENERGY Wylfa Newydd Project 6.4.73 ES Volume D - WNDA Development App D11-3c - Holyhead Deep Disposal Site Marine Archaeological Baseline Report PINS Reference Number: EN010007 Application Reference Number: 6.4.73 June 2018 Revision 1.0 Regulation Number: 5(2)(a) Planning Act 2008 Infrastructure Planning (Applications: Prescribed Forms and Procedure) Regulations 2009 Horizon Internal DCRM Number: WN0902-JAC-PAC-APP-00022 [This page is intentionally blank] Holyhead Deep Disposal Site Marine Archaeological Baseline Report WN0902-JAC-OS-REP-00010 60PO8082/ARC/REP/001 Not protectively marked Revision 2 Prepared for: Jacobs U.K. Ltd. On behalf of: Horizon Nuclear Power Wylfa Limited Prepared by: Wessex Archaeology Portway House Old Sarum Park Salisbury Wiltshire SP4 6EB www.wessexarch.co.uk May 2017 110101.01 © Wessex Archaeology Ltd 2017, all rights reserved Wessex Archaeology Ltd is a Registered Charity No. 287786 (England & Wales) and SC042630 (Scotland) Holyhead Deep Disposal Site Marine Archaeological Baseline Report WN0902-JAC-OS-REP-00010 60PO8082/ARC/REP/001 Quality Assurance Project Code 110101.01 Accession N/A Client WN0902-JAC- Code Ref. OS-REP-00010 Planning N/A UTM30N (projected 380646 E Application from a WGS84 5910818 N Ref. datum) centre point reference Version Status* Prepared by Checked and Approver’s Signature Date Approved By Rev 1.0 E Diana Donohue & Victoria Toby Gane 12-04-2017 Lambert File: W:\Projects\110101\_Reports\DBA\110101_HolyheadDeep_DBS_v04_EDITS_20170412 Rev 2.0 E V. Lambert T. Gane File: W:\Projects\110101\_Reports\DBA\ 110101_HolyheadDeep_Marine Baseline Report R2_20170531VL * I = Internal Draft; E = External Draft; F = Final DISCLAIMER THE MATERIAL CONTAINED IN THIS REPORT WAS DESIGNED AS AN INTEGRAL PART OF A REPORT TO AN INDIVIDUAL CLIENT AND WAS PREPARED SOLELY FOR THE BENEFIT OF THAT CLIENT. THE MATERIAL CONTAINED IN THIS REPORT DOES NOT NECESSARILY STAND ON ITS OWN AND IS NOT INTENDED TO NOR SHOULD IT BE RELIED UPON BY ANY THIRD PARTY. TO THE FULLEST EXTENT PERMITTED BY LAW WESSEX ARCHAEOLOGY WILL NOT BE LIABLE BY REASON OF BREACH OF CONTRACT NEGLIGENCE OR OTHERWISE FOR ANY LOSS OR DAMAGE (WHETHER DIRECT INDIRECT OR CONSEQUENTIAL) OCCASIONED TO ANY PERSON ACTING OR OMITTING TO ACT OR REFRAINING FROM ACTING IN RELIANCE UPON THE MATERIAL CONTAINED IN THIS REPORT ARISING FROM OR CONNECTED WITH ANY ERROR OR OMISSION IN THE MATERIAL CONTAINED IN THE REPORT. 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Holyhead Deep Disposal Site Marine Archaeological Baseline Report WN0902-JAC-OS-REP-00010 60PO8082/ARC/REP/001 Holyhead Deep Disposal Site Marine Archaeological Baseline Report Contents Summary ........................................................................................................................................ iv Acknowledgements ......................................................................................................................... v 1 INTRODUCTION ............................................................................................................... 1 1.1 Project background ........................................................................................................... 1 1.2 Development proposal ...................................................................................................... 1 1.3 The Site............................................................................................................................. 1 1.4 Scope of document ........................................................................................................... 2 1.5 Aims .................................................................................................................................. 2 2 LEGISLATION, GUIDANCE AND POLICY ....................................................................... 2 2.1 Introduction ....................................................................................................................... 2 2.2 Marine Policy..................................................................................................................... 3 National Planning Policy in Wales and the Historic Environment (Wales) Act ........... 3 Welsh Maritime Policy .............................................................................................. 4 2.3 Marine Legislation ............................................................................................................. 4 Planning (Wales) Act 2015 ....................................................................................... 4 2.4 Marine Guidance ............................................................................................................... 5 3 METHODOLOGY .............................................................................................................. 5 3.1 Study Area ........................................................................................................................ 5 3.2 Methodology...................................................................................................................... 5 Sources .................................................................................................................... 5 Chronology ............................................................................................................... 7 Assumptions and Limitations .................................................................................... 7 Copyright .................................................................................................................. 7 3.3 Methodology for Assessment of Value .............................................................................. 7 Assessment for Cultural Heritage Assets ................................................................. 7 Assessment for Seascapes ...................................................................................... 9 4 BASELINE RESOURCE ................................................................................................. 10 4.1 Introduction ..................................................................................................................... 10 4.2 Seabed Prehistory ........................................................................................................... 11 Geology.................................................................................................................. 11 Designated Prehistoric Archaeological Remains .................................................... 12 Non-designated Prehistoric Archaeological Remains ............................................. 12 i WA Project No. 110101.01 Not protectively marked Holyhead Deep Disposal Site Marine Archaeological Baseline Report WN0902-JAC-OS-REP-00010 60PO8082/ARC/REP/001 Potential for Prehistoric Archaeological Remains ................................................... 12 4.3 Maritime and Aviation Archaeology ................................................................................. 13 Designated Maritime and Aviation Sites ................................................................. 13 Non-designated Maritime and Aviation Sites .......................................................... 14 Geophysical Anomalies .......................................................................................... 15 Potential for Unknown Maritime Archaeological Remains ....................................... 15 Potential for Unknown Aviation Archaeological Remains ........................................ 17 4.4 Historic Seascape Character ........................................................................................... 18 Introduction ............................................................................................................ 18 Anglesey Seascape Character Assessment ........................................................... 19 Regional Seascape Assessment ............................................................................ 19 5 VALUE AND SENSITIVITY ............................................................................................. 20 5.1 Value ............................................................................................................................... 20 Seabed prehistory .................................................................................................. 21 Maritime ................................................................................................................. 21 Aviation .................................................................................................................. 21 5.2 Sensitivity ........................................................................................................................ 22 5.3 Historic Seascape Character ........................................................................................... 22 Value and Sensitivity .............................................................................................. 22 6 REFERENCES ................................................................................................................ 23 6.1