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This publication is available at https://www.gov.uk/government/publications/salmons-brook-flood-risk-management-scheme/salmons-brook-flood-risk-management-scheme
The Environment Agency is nearing completion of a £15.3 million flood alleviation scheme to reduce the risk of flooding from Salmons Brook in north London. The scheme will be formally opened soon by Amanda Nobbs, Chair of the Thames Regional Flood and Coastal Committee.
Parts of Edmonton and Enfield have historically had a high risk of flooding from the Salmons Brook and Saddlers Mill Stream. In October 2000, 192 properties in the Montagu Road area of Edmonton flooded.
This multi-site scheme will lower the flood risk of 1,393 properties (2,587 homes, as some of the properties are flats). Of these, 727 homes will see their flood risk reduce to a 1.3% (1-in-75) chance of flooding in any one year. The homes currently most at risk have a 5% (1-in-20) chance of flooding in any year.
The Environment Agency received planning permission from the London Borough of Enfield Council to build the scheme in November 2012, and construction began in May 2013.
A combination of central government grant-in-aid and a contribution from the Thames Regional Flood and Coastal Committee levy funded construction of scheme.
Salmons Walk, between Montagu Road and Plevna Road, Lower Edmonton
The Environment Agency has built a new flood defence wall alongside the cemeteries to prevent flooding from the river. The flood defence wall beside the Tottenham Park Cemetery has been brick clad to match the surrounding area. In front of the new flood wall by the Federation Cemetery the bank has been rebuilt and planted so that in time it will benefit wildlife. Climbers have been planted in front of the wall as a screen.
A new brick-clad flood wall has been built beside the allotments and Barrowfield Close. The river bank in front of the flood defence has been rebuilt, including a new shared foot and cycle path. ###Montagu Recreation Ground, Lower Edmonton The Environment Agency has installed an extension to the railway culvert at the edge of the recreation ground, and built the low bund (earth bank) across it to contain and temporarily store floodwater during times of high river flow. This also has a new path on it. A new headwall at the start of the culvert has been brick faced in a similar way to the railway arch that is now hidden.
A new culvert around the pavilion will take flood water to the existing culvert under Montagu Road.
The Environment Agency has worked with the London Borough of Enfield to improve wildlife habitat and public access within the Montagu Road recreation ground.
Enfield Golf Course, World’s End and Cheyne Walk open space, Grange Park
The Environment Agency has completed the brick cladding of the new river control structure and constructed the embankment with new drainage around it. Grass has been sown on the Cheyne Walk open space and other landscaping completed.
Sandhurst Road and Falcon Fields, Ponders End
Modifications have been made to an existing structure to divert more flood water down the boundary ditch beside Sandhurst Road, reducing the risk of flooding around Montagu Road, Lower Edmonton. To avoid this causing additional flooding in Ponders End, the banks of the boundary ditch have been raised by up to 0.5 metre opposite the Redburn trading estate, Woodcote Close and around some parts of the Falcon Fields allotments.
You can look at photos of the Salmons Brook scheme on Flickr.
Although construction has been completed, the Environment Agency will continue to be involved in looking after the flood alleviation scheme. The Environment Agency has a planning obligation to ensure that the reinstated landscaping establishes and is maintained for the next 5 years. In the longer term they will have responsibility for the new embankment and river structure, and the landowner, Enfield Council, will be responsible for management of the rest of the site. As the embankments are reservoir structures, although dry nearly all of the time, the Environment Agency will regularly inspect and maintain them.
The Environment Agency has held regular drop-in sessions for residents to find out more about the construction work. Grange Park residents were invited to join David Burrowes MP for Enfield Southgate and the Environment Agency at an event in January 2015 to mark the handing back of the Greenway foot and cycle path.
Regular newsletters have been sent to all residents near the construction sites with updates on progress and events.
During construction of the scheme the Environment Agency has worked with residents, local schools and community groups, and several schools visited the site. At Montagu Road, Lower Edmonton, First Rung, a local group improving young people’s skills to increase employment opportunities, ran a project to produce street art on the site hoardings.
Once operational, the Salmons Brook flood alleviation scheme will reduce the likelihood of flooding in Edmonton and Enfield. This might have a beneficial impact on your home insurance when it comes up for renewal. The Environment Agency will be re-modelling the flood risk for the Salmons Brook with the new scheme in place. They will then use this to update the flood map and the National Flood Risk Assessment (NaFRA).
In the interim they may be able to give you a letter explaining how the scheme reduces your flood risk. If you would like one of these letters please email HNLenquiries@environment-agency.gov.uk and you can find more information on insurance.
For more information on the project, please email SalmonsFAS@environment-agency.gov.uk.