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 Smestow Brook River Restoration

rock armour and enkamatRock armour and Geo-Textile
greenhart piles, coir palletsGreenhart piles and coir pallets

Location: Tipton St John. Devon

 Description: Installation of 95m of block stone erosion protection with pre filled erosion protection geo-textile above.

The site was directly upstream of the confluence of River Otter and Metcombe brook both of which are significant migratory routes and spawning sites for trout and salmon. The site is upstream of the Otter Estuary SSSI. Additionally the site was identified as having significant native crayfish and otter activity along with being a nesting site for Sand Martins and Kingfisher. Himalayan Balsam was present in the works area.


Approach: In conjunction with the clients appointed ecologist the following working methods and systems were put in place to minimise impact of the works. Staff used with experience of working in environmentally sensitive sites.

Sand Martins: Netting installed on upper banks prior to nesting season to prevent burrows at the works locations. Netting removed in sections during works and bank surveyed prior to excavation

Otters: Pre works survey and daily inspections during works.

Kingfishers: Pre works survey and on going monitoring of net locations. Provision to place screen nest sites from works if required

Native Cray Fish: Pre works survey of works area and ecologist on hand to monitor during works excavating river bed

Himalayan Balsam: Germinated plants hand pulled and bagged for controlled disposal. All excavated material regarded as contaminated and segregated. Works structured to ensure all excavated material was re used on site.

Silt Control: Geo-textile silt barriers in place during all in channel works. Temporary rock flow defectors used to slow water flow in work areas. Monitoring in place to ensure silt control remained effective at all times.

Innovation: Temporary rock groynes used divert fast flows away from geo-textile silt barrier. Reduced water velocity significantly improved performance of silt barrier in fast flowing river


Project photos are here