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Barnstaple Flood Defence Improvements

Barnstaple Flood Defence Improvements. Phil Emonson, Principal Analyst 20 th April 2016. Contents. 2014-15 study Flood cells and existing defences Fluvial risk and tidal risk Discounted options Option 1 and 2 Effectiveness Costs 2015-16 study Works completed to date.

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Barnstaple Flood Defence Improvements

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  1. Barnstaple Flood Defence Improvements Phil Emonson, Principal Analyst 20th April 2016

  2. Contents • 2014-15 study • Flood cells and existing defences • Fluvial risk and tidal risk • Discounted options • Option 1 and 2 • Effectiveness • Costs • 2015-16 study • Works completed to date

  3. Flood Defence options appraisal 2014-15

  4. Flood Cells

  5. Existing Defences Embankment in Pilton Park Revetments along River Taw Tarka Trail and flood wall Floodplain storage Pilton Park Sheet piling Flood walls along River Yeo

  6. Fluvial Flood Risk • 2015: Most risk is in Cells A and E • 2075: Big increase of risk in Cell B, and to a lesser extent A and E • 2115: Significant increase of risk in Cell B, and C

  7. Tidal Flood Risk • 2015: Most risk is in Cell B • 2075: Big increase of risk in Cell B, and to a lesser extent A, C and E • 2115: Significant increase of risk in Cell B, C and E

  8. Discounted Options

  9. Discounted Options

  10. Flood Defence Options

  11. Option 1

  12. Option 1

  13. Option 2

  14. Effectiveness

  15. Cost • Capital costs – including prelims and optimism

  16. BARNSTAPLE Flood Defences Phase 2 2015-16

  17. Outline of works • Works completed • Service searches, topographic survey and Ground Investigation scoping • Design concepts (for defences along Rolle Quay as well as Pilton Park) • Preliminary sizings, calculations and drawings • Preliminary Environmental Assessment (PEA) • Landscape and Visual Impact assessment • Works planned • Outline Water Framework Directive assessment • Supporting NDDC in outline plans for Pilton Park • Completion of concept drawings and visualisation • Stakeholder engagement • Reporting and identification of needs for further survey / assessment

  18. Possible alignments

  19. Possible alignments

  20. Thank you Phil Emonson Principal Analyst, JBA Consulting philip.emonson@jbaconsulting.com

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