Padiham Flood Scheme Overview - In partnership with the Padiham Town Centre Improvements - The Flood Hub
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Padiham Flood Scheme Overview
In partnership with the Padiham Town Centre Improvements
Will directly protect ~93 homes and
~70 businesses from a flood similar in
size to the Dec 2015 event
£8.7 million whole-life cost
£65 million in direct economic benefits
over 100-years from preventing flooding
2018: Funding secured for appraisal
2019: Funding secured for design & consultation
2020: Detailed design, planning permission,
consents, agreements and approvals
2021: Construction start
Opportunities for wider habitat
creation working with Burnley BC,
Ribble Rivers Trust and Pendle Hill
Landscape Partnership
Construction aiming to start in 2021 Extent of flood defences (red) with existing flood risk (blue)
(pending approvals, planning and Email: cmblnc-pso@environment-agency.gov.uk
Post: PSO, Lutra House, Dodd Way, Walton Summit, Preston, PR5 8BX
funding)
All information subject to change
How Environment Agency Flood Risk Management Schemes are
assured to spend Government Funding on construction?
Summer 2017
Data These steps must be undertaken
gathering & •Weeks/Months
to ensure the cost-beneficial and
•Gather information from community, partners and flood debris
initial •Verify that something new could better manage flood risk
fair spending of tax payer money
investigation
•Months/Years
Strategy & •Improve flood models; Link into other local initiatives and strategies to find mutual benefits;
Summer 2018
additional develop a long-list of ideas
funding •Source additional funding contributions if required
•Test: economic viability, environmental impact, technical feasibility, community acceptance
June 2018: at the June •Months/Years
drop-in event we here Appraisal & •Flood modelling, confirm preferred option, environmental surveys, ground
investigations, detailed economic assessment
Winter 2018-19 preferred •Secure any additional funding requirements
option(s) •Re-test: economic viability, environmental impact, technical feasibility,
community acceptance
Nov 2018: at the Nov drop-
in event we were here
Summer 2019 •Months/Years
Design & •Detailed design, landowner agreements, planning,
permits, procurement
consultation •Re-test: economic viability, environmental impact,
Oct 2019: at the last drop-in event we had just
technical feasibility, community acceptance
had approval to procure the detailed design
2021-22
Spring 2021 Construction of
Pending statutory approval to
procure for construction Flood Scheme
All information subject to change Dates are subject to the impact of COVID-19
What are the timescales?
Task Start date Completion date
Original strategic proposal - £5.8 million of conditional
Winter - Spring 2017 Spring 2018
funding secured (Complete)
Ground and Site Investigations (Complete) Autumn 2018 Winter - Spring 2019
Flood modelling and economic appraisal (Complete) Spring 2019 Summer 2019
Revised outline proposal - £8.7 million of conditional
Autumn 2018 Autumn - Winter 2019
funding secured (Complete)
Detailed design, landowner and stakeholder agreements,
consents, planning application and final approval to
Winter - Spring 2020 Spring 2021
construct
Enabling works Summer 2020 Summer 2021
Service preparations Winter 2020 Summer 2021
Main flood defence construction Spring 2021 Summer 2022
Please note: These are indicative timescales
only and may be subject to change
The impact of COVID-19 will likely mean some of the
dates will be delayed
What is the cost?
Estimated Whole Life Cost: £8.7 million
Current contributions:
£4.4 million Defra ‘Grant-in-Aid’ funding
Local Growth funding
secured by Burnley Council
£3 million through the Lancashire
Enterprise Partnership (LEP)
Regional Flood and Coastal
£1.3 million Committee
Please note: costs are current best estimates and will be refined as the detailed design progresses
*Defra Grant in Aid funding is secured in stages. Funding has only been secured and spent on appraisal and detailed design/planning
What are the current proposals ahead of
detailed design and planning?
Riverside walks
maintained and improved
Removal and treatment of invasive non-
native species (e.g. Japanese knotweed &
Himalayan balsam)
Several ramps and access
points over the walls to
Tree planting throughout
the river
wider Padiham
All information subject to change
Where and to what level will the defences manage flood risk?
The 2015 flood recorded flow of approximately 290 m³/s on the River Calder
The proposed flood defences will manage a flood of approximately 330 m³/s on the River Calder
= 1.3% chance of a flood occurring in any given year plus additions for climate change
The same Standard of Protection for the lower Green Brook
= 1.3% chance of a flood occurring in any given year plus additions for climate change
Flood defence locations
Flood extent with defences (1.3% plus climate change)
Flood extent without defences (1.3% plus climate change)
Flood extent with and without defences (0.1% plus climate change)
River Calder
River Calder
All information subject to change
What could the flood walls look like?
Cockermouth Warrington
(flood gates and access) (art work and railing)
Carlisle
(setback walls do not disconnect path from river)
EA Fluvial
Design Guide
(Garden walls)
What could the flood walls look like?
Fazeley, Tamworth
(Garden walls)
What are the current proposals ahead of
detailed design and planning?
1
2
3
5
4
6
All information subject to change
What are the current proposals ahead of
detailed design and planning?
1 Riverside path / bridleway
East of
BAXI site
2
Riverside path / bridleway
South of
BAXI site
All information subject to changeWhat are the current proposals ahead of
detailed design and planning?
Lune Street /
3 Bendwood Close
4 Waterside Mews
All information subject to changeWhat are the current proposals ahead of
detailed design and planning?
Riverside walk to remain
5 Waterside Mews
/ Town Hall
6 Green Brook /
Waterside Mews
All information subject to changeWhat about maintenance activities?
The Environment Agency cleared gravel and debris under Padiham Bridge in autumn 2018 and
have been monitoring the gravel over 2019.
The Environment Agency will be undertaking treatment and removal of invasive non-native species
such as Japanese knotweed and Himalayan balsam
The flood scheme does not mean an end to maintenance activities in Padiham
In fact, over £400,000 of the whole life scheme costs are attributed to future maintenance
Gravel build-up under Padiham Bridge Cleared gravel under Padiham Bridge
23/10/17 10/12/18
Gravel monitoring
05/02/19Why not just do gravel maintenance / river dredging?
Gravel maintenance is currently
undertaken when the quantity
reaches ‘trigger level thresholds’.
The last clearance was in Oct 2018.
It is not a sustainable activity:
The gravel starts to build again
soon after it is cleared so is not
a passive management regime
and can be costly.
It can impact on the
environment, such as
removing gravel that is vital for
fish to use for spawning and
migration.
Gravel maintenance reduces water Flood extent if gravel is constantly cleared from channel
levels most during smaller floods.
Gravel maintenance will not prevent Gravel maintenance on the River Calder will still continue as required but will not be
big floods like the Dec 2015 event. needed as frequently.
Flood defences will prevent small Gravel removal will continue around Shakespeare Street Bridge on Green Brook.
floods meaning gravel maintenance We are currently seeking funding to undertake maintenance here in the near future.
will no longer be as critical on the
River Calder.What about Flood Alerts and Warnings?
1) Flood Alert for the whole Calder
2) Flood Warnings for:
i) The River Calder at Padiham
ii) Green Brook & Sweet Clough
Flood Alert & Flood Warning trigger thresholds will
be revised to higher levels once any flood defences
are completed
Flood Alerts mean, “be prepared, flood levels
are high and/or forecast to rise”
Flood Alerts can be issued based on river
levels anywhere in the Calder catchment
ranging from Padiham, Burnley, Nelson, Colne
and Whalley.
They can also be issued based on forecasted
overnight impacts.
Flood Warnings mean, “start to act now, flooding is occurring or forecast to likely happen soon”
Issue these based on forecasts for localised gauges to give you as much time as possible to act.
Sometimes the forecasts change at the last minute so please do not get complacent by recent ‘false alarms’.What about Flood Alerts and Warnings?
Flood Alerts and Flood Warnings can be found online at https://flood-warning-information.service.gov.uk/warnings
Or you can sign-up to receive direct Flood Alerts/Warnings by:
i) speaking to our staff
ii) Calling Floodline* on 0345 988 1188
iii) Visiting https://www.gov.uk/sign-up-for-flood-warnings.
*Please note: there are may be charges for calling Floodline of up to 9p per minute from a landline at 3p to 55p per minute from a mobile.
Check with your phone provider as some offer free calls to 0345 numbersYou can also read
