Wylfa Newydd Nuclear Power Station - Development Consent Order (EN010007) Written Representation Biodiversity – Cemlyn Nature Reserve Prepared by Teresa Hughes MSc. MCIEEM (Biodiversity Planning) (North Wales Wildlife Trust 20011639, National Trust 20010995, the Royal Society for the Protection of Birds 20011586) Date 3rd December 2018 (submitted for Deadline 2) From: Simon Roberts To: Wylfa Newydd Cc: Carrie Marchbank Subject: EN010007 Wylfa Newydd Nuclear Power Station: Deadline 2. Submission by RSPB Date: 04 December 2018 12:39:35 Attachments: WYlfa Newydd - RSPB response to the ExA’s written questions Deadline 2 .pdf DCO Evidence - eNGO Biodiversity Cemlyn Nature Reserve FINAL.PDF Ecological Options Final Full Report May 2017.pdf Your ref: EN010007 Our interested party ref: 20011586 Further to the Rule 8 letter please see the attached submissions to the Examination: RSPB response to the Examining Authority’s written questions a joint eNGO written representation: Biodiversity – Cemlyn Nature Reserve a copy of the joint eNGO Ecological Options paper as requested. Kind regards Simon Simon Hugheston-Roberts Swyddog Cadwraeth (Gwaith Achos) / Conservation Officer (Casework) Swyddfa Gogledd Cymru RSPB, Uned 14, Llys Castan, Ffordd y Parc, Parc Menai, Bangor, Gwynedd, LL57 4FH North Wales Office RSPB, Unit 14, Llys Castan, Ffordd y Parc, Parc Menai, Bangor, Gwynedd, LL57 4FH Ffôn/Tel 01248 672850 rspb.org.uk Mae RSPB Cymru’n rhan o’r RSPB, elusen fywyd gwyllt fwyaf y DU, yn ysbrydoli pawb i roi cartref i fyd natur. Ynghyd â’n partneriaid, rydym yn gwarchod adar a bywyd gwyllt sydd mewn perygl fel bod ein trefi, ein harfordir a’n cefn gwlad yn fwrlwm o fywyd unwaith eto. Mae gennym hefyd brif ran o fewn BirdLife International, partneriaeth fyd-eang o gyrff cadwraeth natur. RSPB Cymru is part of the RSPB, the country’s largest nature conservation charity, inspiring everyone to give nature a home. Together with our partners, we protect threatened birds and wildlife so our towns, coast and countryside will teem with life once again. We play a leading role in BirdLife International, a worldwide partnership of nature conservation organisations. Mae’r Gymdeithas Frenhinol er Gwarchod Adar (RSPB) yn elusen gofrestredig: Lloegr a Chymru rhif 207076, yr Alban rhif SC037654 The Royal Society for the Protection of Birds (RSPB) is a registered charity: England and Wales no. 207076, Scotland no. SC037654 Fe all yr e-bost hwn ac unrhyw atodiadau gynnwys deunydd sy'n gyfrinachol neu sy'n atebol i hawlfraint, ac fe’i bwriedid ar gyfer yr unigolyn neu gorff y cyfeirir atynt yn unig. Os nad chi yw’r derbynnydd a enwir, ni ddylech ddefnyddio, datgelu, atgynhyrchu, copïo, na dosbarthu cynnwys y cyfathrebiad hwn. Os derbyniwyd hwn mewn camgymeriad, yna cysylltwch â'r anfonwr a dilëwch yr e-bost hwn o'ch system. Mae’r Gymdeithas Frenhinol er Gwarchod Adar (RSPB) yn elusen gofrestredig: Lloegr a Chymru rhif 207076, yr Alban rhif SC037654 This email and any attachments may contain material that is confidential, subject to copyright and intended for the addressee only. If you are not the named recipient you must not use, disclose, reproduce, copy or distribute the contents of this communication. If you have received this in error, please contact the sender and then delete this email from your system. The Royal Society for the Protection of Birds (RSPB) is a registered charity in England and Wales no. 207076 and in Scotland no. SC037654. ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please visit http://www.symanteccloud.com ______________________________________________________________________ 1 Table of Contents 1. Executive Summary ....................................................................................................... 3 Summary Chapter 3 – Cemlyn Nature Reserve; Anglesey Terns SPA .............................. 3 Summary Chapter 4– Cemlyn Nature Reserve; Cemlyn Bay SAC ..................................... 7 Summary Chapter 5 – Construction of the harbour: Application of the waste hierarchy ..... 9 Summary Chapter 6 Securing mitigation measures through the draft DCO Requirements and controlled documents................................................................................................ 10 2. Introduction .................................................................................................................. 12 NWWT, National Trust and the RSPB ............................................................................. 12 Scope of the Written Representation ............................................................................... 12 3. CEMLYN NATURE RESERVE – Anglesey Terns SPA, tern breeding colony and SSSI 15 Noise and Visual Disturbance at the Anglesey Terns SPA, Cemlyn Nature Reserve Breeding Colony .............................................................................................................. 15 Evidence base supporting the assessment .................................................................. 15 Mitigation for noise and visual impacts at the Anglesey Terns SPA Cemlyn Nature Reserve breeding colony ............................................................................................. 22 Conclusion on noise and visual disturbance at the Anglesey Terns SPA Cemlyn Nature Reserve breeding colony ............................................................................................. 30 Noise and Visual Disturbance during tern commuting and foraging in the Anglesey Terns SPA ................................................................................................................................. 31 Evidence base to support assessment and mitigation approach .................................. 32 Conclusion of the evidence base and analysis for marine noise and visual disturbance on Anglesey Terns SPA .................................................................................................... 40 Mitigation and monitoring ............................................................................................. 42 Impacts to the Anglesey Terns SPA from recreational pressures and visitor management as a result of Wylfa Newydd ............................................................................................ 43 Visitors and workers: Baseline data analysis, recreational management and facilities . 44 Examples and evidence from other planning authorities of Natura 2000 sites with mitigation of recreational pressure impact pathways .................................................... 48 Conclusion of disturbance from changes in recreational use on Anglesey Terns SPA . 50 Impacts causing alteration in predator/undesirable species population dynamics and impacts on Anglesey Terns SPA ..................................................................................... 51 Changes to predator/undesirable species population dynamics ................................... 51 Management of changes to predator/undesirable species population dynamics .......... 53 Functional linkage of Esgair Gemlyn shingle ridge - Cemlyn Bay SAC - with conservation objectives of the Anglesey Terns SPA ............................................................................. 54 Metapopulation dynamics and interaction with other Irish Sea SPA sites ........................ 56 Resilience Measures (eNGO Ecological Options, May 2017) .......................................... 59 4. Cemlyn Bay SAC ......................................................................................................... 61 Context ............................................................................................................................ 61 Risk relating to impacts on the Cemlyn Bay SAC ............................................................ 62 Impact pathways where risks might occur ....................................................................... 62 Potential factors affecting the habitat via the impact pathways ........................................ 63 2 5. Construction of the harbour (MOLF): Application of the Waste Hierarchy - Re-use and disposal of dredged material ............................................................................................... 67 Policy context on the disposal of dredged materials ........................................................ 68 Horizon’s approach to the disposal of dredged materials ................................................. 69 Mechanisms available to meet the policy objectives and manage development risks by the beneficial use of dredged materials ................................................................................. 70 Conclusions on the re-use and disposal of dredged materials ......................................... 73 6. Securing mitigation measures through the draft DCO Requirements and controlled documents .......................................................................................................................... 74 General Commentary ...................................................................................................... 74 Noise and Visual Disturbance Protocol for Anglesey Terns SPA .................................... 74 Monitoring of SPA terns during construction .................................................................... 75 Mound E drainage construction and monitoring of Cemlyn Lagoon SAC ......................... 75 Monitoring and