Unit

Tresillian 12.3

Summary management approach

Manage risk to the A390, and at the same time aim to increase the intertidal habitat in the area. The river channel has been artificially narrowed as commercial development has encroached on the river channel. The intention is to move infrastructure with as little impact on the commercial properties as possible to enable the widening of the channel. The A390 should be sustainable in it's current position. The adopted SMP policy is either Hold the Line or Managed Realignment in the medium and long-term, depending on investigation into options.

Generic approach assigned to this unit

Management approaches depend on funding and relevant approvals and permissions. Adaptation to coastal change may be needed. If defences are present, some risk from flooding, erosion or ground instability may remain.

Time periods (short (0 to 20 years), medium (20 to 50 years) and long (50 to 100)) are approximate and do not signify precise dates of management transitions.

0 to 20 years (2005 to 2025)

HL1Hold the lineMaintain/replace

Where protection is currently provided by coastal defence structures or managed beaches, and the intention is to retain a defence along approximately the current alignment. This will involve replacing defences when needed. Defence type, method and standard of protection may be modified over time.

---

20 to 50 years (2025 to 2055)

MR7Managed realignmentPlaceholder

Managed realignment or defence activity may apply only to parts of this shoreline. The approach in this location may be especially dependent upon the outcome of further studies, economic assessments, the rate of coastal change or the actions of other asset owners affected by coastal change. As these become clearer, the management intention will be clarified.

---

50 to 100 years (2055 to 2105)

MR7Managed realignmentPlaceholder

Managed realignment or defence activity may apply only to parts of this shoreline. The approach in this location may be especially dependent upon the outcome of further studies, economic assessments, the rate of coastal change or the actions of other asset owners affected by coastal change. As these become clearer, the management intention will be clarified.

---

Neighbouring units

The following units are within 1km of this one:

• Undefended Estuary Banks 12.1

Protected sites

This area of coastline is in or near a special protection area.

Data last updated: 2024-04-17

View Special Protection Area on the Data Services Platform

This area of coastline is in or near an area of outstanding natural beauty.

Data last updated: 2024-06-29

View Area of Outstanding Natural Beauty on the Data Services Platform

This area of coastline is in or near 2 special conservation areas.

Data last updated: 2024-04-17

View Special Area of Conservation on the Data Services Platform

This area of coastline is not in or near a ramsar wetland area.

Data last updated: 2024-04-03

View Ramsar Site on the Data Services Platform

There are no scheduled monuments near this area of coastline.

Data last updated: 2024-04-03

View Scheduled Monument on the Data Services Platform

This area of coastline is not in or near a local nature reserve.

Data last updated: 2024-06-29

View Local Nature Reserve on the Data Services Platform

There are 2 sites of special scientific interest near this area of coastline.

Data last updated: 2024-06-29

View Site of Special Scientific Interest on the Data Services Platform

This area of coastline is not in or near a national nature reserve.

Data last updated: 2024-06-29

View National Nature Reserve on the Data Services Platform

There are no marine conservation zones near this area of coastline.

Data last updated: 2024-04-03

View Marine Conservation Zone on the Data Services Platform

---

Actions for this unit

All actions are subject to funding and approval, often by other parties than the Lead Organisation shown.

Reference Number	Action Description	Action Lead Organisation	Action Progress Status	Priority
17.178	Develop Fal and Helford Intertidal Habitat and Sedimentation Strategy. This should define sedimentation monitoring and other evidence requirements to improve understanding of evolution of Special Area of Conservation (SAC) features over the long term, maintain its condition and determine timescales for managed realignment. Develop an evidence base available for strategic planning and investment in risk management. Include a review of SAC boundary to include all mudflat and saltmarsh habitats at Mylor Creek, Navas, and Gweek Restronguet to Devoran, Tresillian, Penryn, Porth, Ruan Lanihorne, Truro - Upper Basin.	Environment Agency	Progressing	High
17.046	Identify triggers for transition towards a managed realignment approach, engage with local business and others affected and develop a community adaptation strategy to climate change to improve community resilience to flooding. Ensure adaptation strategy included in Settlement strategy.	Pending agreement	Not yet started	Medium
17.046.01	Develop a managed realignment at Tresillian, which should provide a minimum of 1.7ha and up to 2.45ha of potential area for intertidal habitat migration by 2055 and reduce risks to infrastructure and property. Monitor environmental outcomes and property relocation needs.	Environment Agency	Not yet started	Medium
17.207	Undertake Environment Agency Fal Tidal Modelling study	Environment Agency	Complete

Download table as spreadsheet (CSV)

Download SMP documents

The information on this website represents the current SMP management approaches adopted by the local authorities within its area, and current actions needed to deliver them. These management approaches have been approved by the Environment Agency under its Strategic Overview for coastal flood and erosion risk management and are considered to be local policy.

The documents below provide the full SMP adopted locally and approved by the Environment Agency at the time of publication. Some of the information has changed in response to new government policy, new evidence or new work identified.

Data on this page

• Action plan (CSV)
• Policies (CSV)

Main report

• Chapter 1 - Introduction
• Chapter 2 - Environmental Assessment
• Chapter 3 - Basis for the Plan

• Chapter 4 - Management Units:

  • Introduction to the management units
  • PDZ1 - Pencarrow Head to Gribbin Head - Introduction
  • MA1 - Rame Head to Downderry
  • MA2 - Downderry and Seaton
  • MA3 - Seaton to Pencarrow Head
  • PDZ2 - Pencarrow Head to Gribbin Head - Introduction
  • MA4 - Pencarrow Head to Gribbin Head
  • MA5 - Fowey Estuary (above Mixtow) inc tributaries
  • PDZ3 - Gribbin Head to Black Head - Introduction
  • MA6 - Gribbin Head to Par Docks
  • MA7 - Par Docks to Black Head
  • PDZ4 - Black Head to Zone Point - Introduction
  • MA8 - Black Head to Dodman Point
  • MA9 - Veryan Bay
  • MA10 - Gerrans Bay
  • PDZ5 - Zone Point to Nare Point - Introduction
  • MA11 - Lower Fal
  • MA12 - Upper Fal
  • MA13 - Pendennis Point to Rosemullion Head
  • MA14 - Helford
  • PDZ6 - Lizard (Nare Point to Baulk Head - Gunwalloe) - Introduction
  • MA15 - Lizard East (Nare Point to Lizard Point)
  • MA16 - Lizard West (Lizard Point to Baulk Head)
  • PDZ7 - Mounts Bay East (Baulk Head (Gunwalloe) to Marazion) - Introduction
  • MA17 - Baulk Head to Trewavas Head
  • MA18 - Trewavas Head to The Greeb
  • PDZ8 - Mounts Bay West (The Greeb to Point Spaniard (Inc Marazion and St Michael’s Mount - Introduction
  • MA19 - Marazion to Longrock
  • MA20 - Longrock to Penzance
  • MA21 - Penzance and Newlyn (Albert Pier to Sandy Cove)
  • MA22 - Mousehole (Sandy Cove breakwater - Point Spaniard)
  • PDZ9 - Penwith Peninsula (Point Spaniard to Clodgy Point) - Introduction
  • MA23 - Point Spaniard to Land’s End
  • MA24 - Land’s End to Clodgy Point (St Ives)
  • PDZ10 - Clodgy Point to Godrevy Point - Introduction
  • MA25 - Clodgy Point to Porthminster Point
  • MA26 - Porthminster Point to Hayle Estuary
  • MA27 - Hayle Estuary
  • MA28 - Black Cliff to Godrevy Point
  • PDZ11 - North Cliffs (Godrevy Point - Pentire Point West) Introduction
  • MA29 - Godrevy Point to St Agnes Head
  • MA30 - St Agnes Head to Pentire Point West
  • PDZ12 - Newquay (Pentire Point West - Trevelgue Head) Introduction
  • MA31 - Fistral Bay and Crantock
  • MA32 - Newquay Bay
  • PDZ13 - Trevelgue Head to Stepper Point - Introduction
  • MA33 - Trevelgue Head to Trevose Head
  • MA34 - Trevose Head to Stepper Point
  • PDZ14 - Camel Estuary (Stepper Point to Pentire Point) - Introduction
  • MA35 - Camel Estuary (Stepper Point to Trebetherick Point)
  • MA36 - Trebetherick Point to Pentire Point
  • PDZ15 - Pentire Point to Wanson Mouth - Introduction
  • MA37 - Pentire Point to Boscastle
  • MA38 - Boscastle to Wanson Mouth
  • PDZ16 - Widemouth & Bude (Wanson Mouth to Lower Sharpnose Point) - Introduction
  • MA39 - Wanson Mouth to Higher Longbeak
  • MA40 - Higher Longbeak to Lower Sharpnose Point
  • PDZ17 - Lower Sharpnose Point to Hartland Point - Introduction
  • MA41 - Lower Sharpnose Point to Hartland Point
  • PDZ18 - Isles of Scilly - Introduction
  • MA42 - St Mary’s
  • MA43 - St Martin’s
  • MA44 - Tresco
  • MA45 - Bryher
  • MA46 - St Agnes and Gugh

• Chapter 5 – Summary of Preferred Plan Introduction:

  • Summary of Preferred Plan - Introduction
• Chapter 6 - Action plan
• Glossary
• Acknowledgements

Appendices

• Appendix A – SMP Development
• Appendix B – Stakeholder Engagement
• Appendix C - Baseline
• Appendix D – Theme Review Final Report
• Appendix E – Issues and Objectives

• Appendix F - SEA:

  • Sea Pre Consultation Report March 2010 Pages 1-200
  • Sea Pre Consultation Report March 2010 Pages 201-296
  • Sea Statement Of Environmental Particulars Post Consultation
  • Annex 1
  • Annex 2
  • Sea Pre Consultation Report March 2010
• Appendix G – Scenario Testing

• Appendix H - Economic Appraisal:

  • Appendix H Final Report Pages 1-12
  • Appendix H Final Report Pages 13-32
  • Appendix H Final Report Pages 33-46

• Appendix I - HRA:

  • Appendix A Cornwall And Ios Smp2 Appropriate Assessment 1
  • Appendix B Sssi Condition Tables
  • Appendix D Hr01
  • Appendix E Hr02
  • Hra Appendix C1 Pdz10 Assessment Tablesv2 Submitted
  • Hra Appendix C1 Pdz11 Assessment Tablesv2 Submitted
  • Hra Appendix C1 Pdz12 Assessment Tablesv2 Submitted
  • Hra Appendix C1 Pdz13 Assessment Tablesv2 Submitted
  • Hra Appendix C1 Pdz14 Assessment Tablesv2 Submitted
  • Hra Appendix C1 Pdz16 Assessment Tablesv2 Submitted
  • Hra Appendix C1 Pdz18 Assessment Tablesv2 Submitted
  • Hra Appendix C1 Pdz1 Assessment Tablesv2 Submitted
  • Hra Appendix C1 Pdz2 Assessment Tablesv2 Submitted
  • Hra Appendix C1 Pdz3 Assessment Tablesv2 Submitted
  • Hra Appendix C1 Pdz4 Assessment Tablesv2 Submitted
  • Hra Appendix C1 Pdz5 Assessment Tablesv2 Submitted
  • Hra Appendix C1 Pdz6 Assessment Tablesv2 Submitted
  • Hra Appendix C1 Pdz7 Assessment Tablesv2 Submitted
  • Hra Appendix C1 Pdz8 Assessment Tablesv2 Submitted
  • Hra Appendix C1 Pdz9 Assessment Tablesv2 Submitted
• Appendix J - Water framework Assessment
• Appendix K - GIS Data
• Appendix L - Adoption

Summaries

• Summary leaflet
• Cornwall Summary Document
• Isles of Scilly Summary Document

Supporting documents

• Public consultation responses - Cornwall
• Public consultation responses - Isles of Scilly
• Statement of environmental particulars
• Pre-consultation report
• SMP Reviews

Related links

• Coastal Group Website
• Coastal Handbook
• National Coast Monitoring
• Flood and coastal erosion risk management: current schemes and strategies
• Designated Sites View
• Strategic Flood Risk Assessment mapping tool