Case study:Borrowash fish pass

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Location: 52° 54' 6.21" N, 1° 23' 58.48" W

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Project overview

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Status	Complete
Project web site
Themes	Fisheries
Country	England
Main contact forename	Jim
Main contact surname	Finnegan
Main contact user ID	User:NickRRC
Contact organisation	Environment Agency
Contact organisation web site	http://www.environment-agency.gov.uk/news/143012.aspx
Partner organisations
Parent multi-site project
This is a parent project encompassing the following projects	No

Larinier fish pass at Borrowash complete (image courtesy of J.Finnegan, the Environment Agency)

Project summary

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Borrowash fish pass is the largest in the Midlands region to date. It is located at Borrowash on the River Derwent, a major tributary of the River Trent in Derbyshire. In total it took twelve months to complete the 2.7m wide three stage Larinier design at a total cost of £650,000.

The overall aim was to increase fish passage, by enabling access to habitats both up and downstream of the weir. This project is part of a wider range of fish passage improvements planned for the East Midlands region, as restrictions to free fish passage are now seen as the main factor limiting fish stocks within the Trent catchment. There are currently nine proposed sites including Church Wilne and Whatstandwell gauging weirs. Partners involved include the Environment Agency, the Trent Rivers Trust and Derby County Council, as well as local angling clubs and the local community. The long term aim of this catchment scale project is to improve the river’s status under the Water Framework Directive.

The Borrowash pass is the first artificial barrier on the River Derwent, and therefore of strategic importance to improve longitudinal connectivity for fish, sediment, invertebrates and nutrients within the catchment. In 2010 salmon were seen on the Derwent for the first time in 200 years, however the pass will also benefit other species specifically brown trout, chub, dace, minnows, eels and lamprey . Boosting fish stocks will also improve angling opportunities in the local area.

The River Restoration Centre would like to thank the Environment Agency for providing the information and photographs for this case study.

Monitoring surveys and results

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Catchment and subcatchment

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Site

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Name	Borrowash
WFD water body codes
WFD (national) typology
WFD water body name
Pre-project morphology
Reference morphology
Desired post project morphology
Heavily modified water body	No
National/international site designation
Local/regional site designations
Protected species present	No
Invasive species present	No
Species of interest	Salmon, Brown trout
Dominant hydrology
Dominant substrate
River corridor land use	Urban, Intensive agriculture (arable), Broadleaf/mixed woodland (semi natural)
Average bankfull channel width category
Average bankfull channel width (m)
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Project background

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Reach length directly affected (m)	8585 m <br />0.085 km <br />8,500 cm <br />
Project started
Works started
Works completed
Project completed
Total cost category
Total cost (k€)	770770 k€ <br />770,000 € <br />
Benefit to cost ratio
Funding sources	The Environment Agency

Cost for project phases

Phase	cost category	cost exact (k€)	Lead organisation	Contact forename	Contact surname
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Reasons for river restoration

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Mitigation of a pressure	Impoundments (not hydropower)
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Measures

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Structural measures
Bank/bed modifications	Larinier fish pass
Floodplain / River corridor
Planform / Channel pattern
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Monitoring

Hydromorphological quality elements

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Monitoring documents

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Image gallery

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Borrowash weir 121m long (image courtesy of J.Finnegan at the Environment Agency)

fish pass in construction (image courtesy of J.Finnegan at the Environment Agency)

fish pass (image courtesy of J.Finnegan at the Environment Agency)

fish pass (image courtesy of J.Finnegan at the Environment Agency)

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Additional links and references

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Supplementary Information

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