Welcome [] ·  · 2017-12-01Welcome . Introduction to the project Sharon Bleese, ... Do nothing – walkaway 2. ... Raising of bascule bridge or road closure for temporary demountable

Welcome

Introduction to the project

Sharon Bleese, Project Manager

Lowestoft Flood Risk Management Project reducing risk, supporting growth, creating opportunities

December 2013 tidal surge impacts

• Largest in Lowestoft since 1953

• Over 160 properties affected

• Businesses brought to standstill

• Highlighted the inadequacy of Lowestoft’s defences and the impact on existing and potential growth

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Economic study headlines (1)

Total jobs: 10,900 Total GVA (million) £499

Proportion of current economic footprint at risk of flooding under two scenarios Without climate change With climate change

Scenarios

Jobs GVA Jobs GVA

1. Do minimum 22% 23% 63% 71%

1. Preferred tidal gate and wall scheme 2% 2% 2% 2%

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Economic study headlines (2)

Total jobs: 14,400 Total GVA (million) £694

Future economic footprint (assuming AAP delivered)

Scenarios

Jobs GVA Jobs GVA

1. Do minimum 28% 27% 70% 77%

1. Preferred tidal gate and wall scheme 2% 2% 3% 3%

Proportion of future economic footprint at risk of flooding under two scenarios Without climate change With climate change

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Lowestoft Flood Risk Management Project

Reducing tidal risk - temporary defences

Tidal Flood Risk Management Ben Purkiss, CH2M

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Lowestoft FRMP – Tidal scheme

Options considered

1. Do nothing – walkaway

2. Do minimum – maintain status quo

3. Improve: Walls only

4. Improve: Outer harbour barriers & walls

5. Improve: Bascule bridge barrier & walls

6. Improve: Barriers at Third Crossing & walls

7. Temporary flood defences

8. Property level resilience

(Shortlisted options in bold)

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Options considered

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Key shortlisted options 3. Improve –

flood walls only

Discounted, due to:

Tidal inundation into Lake Lothing.

Increased flood risk - 5 times longer sea frontage.

Walls built on existing quay wall, interact with major services, businesses,

road/ rail network.

Raising of bascule bridge or road closure for temporary demountable at

Waveney road beyond year 50

5. Improve –

Bascule Bridge

barrier & walls

Recommended as the preferred option, due to:

Shorter length of floodwalls.

Single barrier in narrow river channel.

6. Improve –

Barriers at Third

Crossing & walls

Discounted, due to:

3 barriers, longer length of walls, interaction with quay walls, major

services

Disruption to quayside businesses during construction.

Raising of Bascule Bridge/road closure for temporary demountable

Waveney Road beyond year 50.

New control building required.

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Waveney Road

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Tidal barrier – before and after

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Tidal Barrier

•Mitre Gates

•Barrier width- consultation with ABP

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Station square- before and after

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Waveney Road- before and after

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Port Entrance- before and after

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Hamilton Road

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Hamilton Road – before and after

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Yacht Club and South Pier/Beach

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Royal Norfolk & Suffolk Yacht Club – before and after

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South Pier- before and after

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Now

Completion

Further activities and programme

Outline designs, May-Oct`17 OBC, Oct 17– April 18

Planning application for walls, Nov 17 –Jul 18 Legal & funding Agreements, Nov 17- Jul 18

TWAO, Marine license Sep 17- Jul 19

Flood Walls D&B, Nov17- Mar 19

Barrier D&B, Nov18- Dec 20

FBC, Aug 18- Nov18

SOC and consultation 2016/17

Thank You

Summary and next steps

Sharon Bleese, Project Manager