Case Studies

European Eel Trap and Transport

On behalf of Southern Water Services our fisheries specialists undertook an intensive European eel trap and transport project at two operational surface water assets. Our team trapped  intensively with the aim to remove land locked eel, allowing them to complete their life cycle by migrating to sea to spawn, increasing silver eel escapement and improving recruitment of a species in decline.

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White-Clawed Crayfish Survey

Our Natural England licensed ecologists undertook white-clawed crayfish baseline surveys required for option appraisal of a highway infrastructure scheme. Manual search and trapping methodology was used to survey two water bodies for our native species of crayfish.

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River Restoration, Upper Wensum Phase Three

Five Rivers undertook the third construction phase of river and floodplain restoration works on the Upper River Wensum Site of Special Scientific Interest (SSSI) and Special Area of Conservation (SAC), to reinstate natural form and flow within the River Wensum, benefiting local ecology and the environment. This follows initial phases successfully completed in 2015 and 2016.

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Pentney Abbey River Restoration, River Nar

This project was successfully delivered for Anglian Water as part of their AMP6 National Environment Program (NEP) commitments. We installed bed narrowing structures and riffles along a 2.7km reach of the River Nar SSSI at Pentney Abbey, Norfolk. This river restoration project improved on the existing over widened, flat and featureless bed. The project delivered fish habitat improvements, flow diversity and improved wet margin ecosystems.

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Flex MSE installation River Test, Romsey

Five Rivers Environmental Contracting were contracted to replace the failing wooden revetment with Flex MSE on River Test SSSI. This system allows walls to be built using Flex MSE bags. These bags can be planted in and hydro-seeded, creating a long lasting, green structure that will prevent the loss of river bank from erosion.

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Warminster Park River Restoration

Five Rivers were contracted to restore a section of river in Warminster park. We removed 300m of failing wooden revetment and replaced with bioengineering solution.

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Bristol Avon Riverbank Repair

Bank protection and oak cladding for residential re-development project on the Bristol Avon, innovative re-use of large woody material to main habitat benefits.

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Erosion protection on the River Nadder

Five Rivers Environmental Contracting were contracted to install bio-engineered bank erosion protection to prevent on the River Nadder

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Abstraction monitoring

Our team carried out aquatic monitoring required to investigate the impact of abstraction. Our multidisciplinary team of ecologists undertook fully quantitative electric fishing, macrophyte surveys using LEAFPACS2 methodology and macroinvertebrate sample collection across two seasons. Our high quality data will be used to inform water resource management decisions.

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Large scale fish removal

Large scale fish removal delivered on behalf of a utility company, required as part of a water recycling centre upgrade. Using a range of fish sampling methodology fish were removed from eight lagoons and trans-located to a receptor recreational fishery.

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