Cornwall and Isles of Scilly SMP2-Appendix
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APPENDIX Cornwall and Isles of Scilly Shoreline Management Plan 2 Mid Term Review Management Area Reports Client: Cornwall Council Reference: WATPB4338R001D01 Revision: 02/Draft Date: 21 September 2016 O p e n HASKONINGDHV UK LTD. Stratus House Emperor Way Exeter EX1 3QS Water VAT registration number: 792428892 +44 1392 447999 T +44 1392 446148 F [email protected] E royalhaskoningdhv.com W Document title: Cornwall and Isles of Scilly Shoreline Management Plan 2 Mid Term Review Document short title: Reference: WATPB4338R001D01 Revision: 02/Draft Date: 21 September 2016 Project name: Shoreline Management Plan 2 Project number: PB4338 Author(s): Greg Guthrie, Julie Dunstan Drafted by: Julie Dunstan Checked by: Greg Guthrie Date / initials: Approved by: Date / initials: Classification Open Disclaimer No part of these specifications/printed matter may be reproduced and/or published by print, photocopy, microfilm or by any other means, without the prior written permission of HaskoningDHV UK Ltd.; nor may they be used, without such permission, for any purposes other than that for which they were produced. HaskoningDHV UK Ltd. accepts no responsibility or liability for these specifications/printed matter to any party other than the persons by whom it was commissioned and as concluded under that Appointment. The quality management system of HaskoningDHV UK Ltd. has been certified in accordance with ISO 9001, ISO 14001 and OHSAS 18001. 21 September 2016 WATPB4338R001D01 i O p e n Appendix MA 01 Rame Head to Downderry MA 02 Downderry and Seaton MA 03 Seaton to Pencarrow Head MA 06 Gribben Head to Par Docks MA 07 Par Docks to Black Head MA 08 Black Head to Dodman Point MA 09 Veryan Bay MA 11 Lower Fal MA 12 Upper Fal MA 13 Pendennis Point to Rosemullion Head MA 15 Lizard East (Nare Point to Lizard Point) MA 16 Lizard West (Lizard Point to Baulk Head) MA 17 Baulk Head to Trewavas Head MA 18 Trewavas Head to The Greeb MA 19 Marazion to Longrock MA 20 Longrock to Penzance MA 21 Penzance and Newlyn (Albert Pier to Sandy Cove) MA 27 Hayle Estuary MA 29 Godrevy Point to St Agnes Head MA 30 St Agnes Head to Pentire Point West MA 31 Fistral Bay and Crantock MA 32 Newquay Bay MA 33 Trevelgue Head to Trevose Head MA 34 Trevose Head to Stepper Point MA 35 Camel Estuary (Stepper Point to Trebetherick Point) MA 36 Trebetherick Point to Pentire Point MA 37 Pentire Point to Boscastle MA 38 Boscastle to Wanson Mouth MA 39 Wanson Mouth to Higher Longbeak MA 40 Higher Longbeak to Sharpnose Point 21 September 2016 WATPB4338R001D01 ii O p e n List of Acronyms CC Cornwall Council EA Environment Agency CCc Cornwall Council Coastal CCh Cornwall Council Highways CCp Cornwall Council Planning HE Historic England NE Natural England PCO Plymouth Coastal Observatory RNLI Royal National Lifeboat Institution NT National Trust SWW South West Water POL Policy INV Involvement Gst General study MON Monitoring Rst Risk Study Sch Scheme 21 September 2016 WATPB4338R001D01 iii MA 01 Rame Head to Downderry O p e n Location Reference: Rame Head to Downderry Management Area reference: MA 01 Policy Development Zone: PDZ1 21 September 2016 APPENDIX WATPB4338R001D01 MA01 O p e n DELIVERY OF THE PLAN SUMMARY OF SPECIFIC POLICIES Policy Unit Policy Plan 2025 2055 2105 Comment Undefended cliffs Meets objectives for SSSIs, AONB and Heritage 1.1 NAI NAI NAI and beach Coast Initially maintain hold the line approach to protect heritage interests and community. Manage the longer term risks, reduce reliance on defences and return to 1.2 Portwrinkle HTL MR MR a more naturally functioning coastline through introduction of managed realignment during epochs 2 & 3. Key: HTL - Hold the Line, A - Advance the Line, NAI – No Active Intervention MR – Managed Realignment PREFERRED POLICY TO IMPLEMENT PLAN: From present day NAI for natural hard cliff coastline and beaches, HTL at Portwrinkle Medium term NAI for natural hard cliff coastline and beaches, MR at Portwrinkle Long term NAI for hard cliff coastline, NAI at Portwrinkle SUMMARY OF ISSUES AND PROGRESS INTENT OF THE CHANGE: The SMP identifies that with climate change and particularly sea level rise, there will be increased pressure on defences with little economic justification for their continued management. This will have significant impacts on Portwrinkle village and historic values of the area. While policies suggest change moving from epoch 1 to epoch 2 (around 2025) from HTL to MR, it is really the process of change in terms of moving from present defence positions to a more sustainable approach to risk management that is being recommended. IMPLICATIONS: There is significant potential impact on the main road and access through the village and around the harbour area. This may also impact on properties within the core conservation area. Loss of beaches and beach carparks are seen as having a significant impact on the community and the broader tourism interests in the area. The main issue identified by the SMP2 is the lack of economic justification for continued defence management. Local management of these defences is not seen as having a significant impact on the wider area. However, with sea level rise the harbour area will provide less protection and use of the harbour piers will become more difficult and limited. There is a need recommended within the SMP for monitoring and for engagement with the community and organisations with interests in the area to develop a longer term adaptation plan. This needs to be taken forward in the understanding that maintaining defences may influence the development of beaches around the village and that therefore there will be a need for change. 21 September 2016 APPENDIX WATPB4338R001D01 MA01 O p e n PROGRESS REVIEW Monitoring of beach change and cliff erosion is critical in advising the time scales of change. At present this area is not understood to be included with the Plymouth Coastal Observatory monitoring programme. Apart from publication of the SMP, no further action has been undertaken in terms of earlier community involvement. 21 September 2016 APPENDIX WATPB4338R001D01 MA01 O p e n ACTIONS: No. Type Owner Action Partners Programme 1/MON1/PCO Monitoring PCO Beach monitoring CCc, EA On-going 1/MON2/CCc Defences CCc Defence and harbour structures inspection and monitoring EA, harbour users On-going 1/INV1/CCp Consultation CCp Organise initial public meeting to discuss and raise awareness CCc, community 2016 with the community 1/POL1/CCp Policy CCp Consult, agree and define as a CCMA Community, CCc, CCh, HE. 2017 1/INV2/CCp Adaptation CCp Review of long term adaptation plan for the area CCc, community, CCh, HE, NE, 2020 planning EA, (multi agency) 21 September 2016 APPENDIX WATPB4338R001D01 MA01 MA 02 Downderry and Seaton O p e n Location reference: Downderry and Seaton Management Area Reference: MA 02 Policy Development Zone: PDZ1 21 September 2016 APPENDIX WATPB4338R001D01 MA02 O p e n DELIVERY OF THE PLAN SUMMARY OF SPECIFIC POLICIES Policy Unit Policy Plan 2025 2055 2105 Comment Commitment from Cornwall Council to ongoing monitoring of the ‘Action Line’, to provide an ongoing re-assurance to the community. Most recent monitoring 2.1 Downderry East NAI NAI NAI indicates maximum erosion of around 300mm over 5 years. Private defences have slowed down natural rates of erosion Initially hold defences during epoch 1, continuing SMP1 policy. Longer term objective is to allow coast to adjust in medium to longer term through managed Downderry West 2.2 HTL MR MR realignment. This is a coastal change area and would & Seaton require support through the land use planning system to manage the relocation of development away from the risk zone over time. The preferred plan requires commitment to early realignment of the road and promotes robust resilience to flooding. Any realignment undertaken should not 2.3 Seaton Beach MR NAI NAI reduce the capacity of the river to discharge. Return to naturally functioning frontage is long term goal. Key: HTL - Hold the Line, A - Advance the Line, NAI – No Active Intervention MR – Managed Realignment PREFERRED POLICY TO IMPLEMENT PLAN: From present day Manage erosion risks at Downderry west through continued coast protection, allow natural slower erosion at Downderry east of Beach Hill. Monitor erosion rates / beach levels. Initiate managed realignment at Seaton. Medium term Continue NAI at Downderry east, based on monitoring. Move to MR for Downderry west. NAI at Seaton following realignment in epoch 1. Long term Continue NAI at Downderry east, based on monitoring. Continue MR for Downderry west. NAI at Seaton. SUMMARY OF ISSUES AND PROGRESS INTENT OF THE CHANGE: The SMP highlights the increasing pressure on all these frontages, principally due to sea level rise. As this occurs it will be more difficult to maintain existing defence and there is likely to be increasing erosion over undefended areas. Assessing future economic justification, it seems unlikely that there would be a case for intervention. Over the whole frontage, therefore, the SMP is recommending moving towards a policy of change and managed realignment. This underlying intent is reflected in different ways across the three policy units. Specifically, within Policy Unit 2.1, the policy is for NAI, although consideration might be given to improvement to private defences. From previous studies the aim within the SMP actions is to ensure that residents are aware of the rate of retreat of the cliffs so that individual decisions can be made. 21 September 2016 APPENDIX WATPB4338R001D01 MA02 O p e n Within the central policy unit (2.2) the intent would be to maintain the existing defence while alternative approaches in terms of critical transport needs are addressed. This needs to be considered alongside the potential need of realigning the road within Policy Unit 2.3.