Regeneration project includes Flex MSE Systems for Harrow area thanks to London Mayors Big Green Fund

Case Study: Bank Repair/Regeneration, Stanmore Marsh, harrow, HA7, UK

Client: Harrow Council

Designers: Atkins Global

Contractor: CPC Civils Ltd

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As part of the Mayor of London’s Big Green Fund in 2016, Stanmore Marsh was awarded part of the £900,000 grant to allow for regeneration of neglected green space within the Harrow area.

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The site, over four hectares, was once full of wildlife and a source of enjoyment & leisure activities for the local community. Over the course of 40+ years however, it became neglected, no longer acting as a green space for floodwater alleviation, increasing the incidence of localised flooding.

The award-winning Flex MSE® Vegetated Wall System was specified by the designers, Atkins Global, to replace up to 180m of failed timber revetment lining the edge of the watercourse. Edgeware Brook.

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Flex MSE® was selected, in addition to it’s longevity statement and green engineered properties, as the units could be transported to the site with ease, installed quickly and made structurally sound once completed.

The Flex MSE® nonwoven GTX bags were filled with a proprietary mix (66:34) of clean sand & organic compost. This allowed for a geomodular block system that was free-draining, water & root permeable and stable over time whilst allowing for growth of native vegetation. Flex MSE® patented & engineered interlocking plates were placed between the bottom course of bags and the riverbed, and every joint between the bags, creating a flexible & stable geomodular block structure that followed the original contour of the bank.

The project created approximately 400m of new footpaths and up to 400m2 of wetland. This allowed for providing well over 3,000m3 of additional floodwater storage. Several hundred metres of water habitats and environments, made up of a network of small wetlands and ditches, were also revitalised utilising Flex MSE® system, for riverbank repair and restoration.