Case Studies

River Restoration on the River Nar, Norfolk

Working for the Norfolk Internal Drainage Board to restore four reaches of the River Nar in and around Castle Acre. The River Nar is in a Site of Special Scientific Interest (SSSI).

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Electric Fishing Surveys

Our experienced fish survey team have delivered numerous electric fishing surveys across the UK in 2016.

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Lake Fish Surveys – Invasive Species Investigation

The project aim was to investigate the presence / absence of invasive fish species in a number of South West Water’s assets using a range of fisheries survey methods.

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River Bulbourne Restoration, Hertfordshire

Chalk Stream restoration project on the River Bulbourne near Hemel Hempstead, re-grading and enhancing 2km of this important chalk stream habitat in an urban setting.

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Anton Lakes Weir Repairs

This project for Test Valley Borough Council involved repairs to an existing concrete weir structure in between two online lakes, replacement of failing oak revetments and installation of soft engineering solutions.

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River Wensum Restoration Works Phase 2

This is year 2 of a 3 year scheme to restore 6km of the upper Wensum in Norfolk, we worked with designers Atkins to utilise a range of restoration techniques to counteract historic management of this important chalk river.

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River Ash Weir By-pass, Surrey

This project successfully opened up and restored a by-pass channel to navigate impoundment structures and online lake on the River Ash in Surrey.  This involved a range of techniques to increase fish passability and improve in stream habitat.

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Hammer Stream River Restoration

These works were to improve in stream habitat and flood plain connectivity in a 900m section of the Hammer Stream near Biddenden, Kent.  Five Rivers worked with our clients designs to install a meandering low flow channel in this previously canalised reach as well re-connecting the old course of the river to provide a natural flood management channel.

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Riverbank Protection Salisbury

We removed 200m of failing oak revetment and replaced with low level berm to provide more sustainable bank protection.  In more shaded areas the revetment was replaced with heavy duty 50mm green oak.

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River Diversion Enabling Works in Berkshire

We worked with MJ Abbott to create 100m of river channel to enable new access into development site, we also installed 200m of bio-engineered revetment to limit erosion throughout the site.

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