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.

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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)

Catchment and subcatchment Select a catchment/subcatchment Edit the catchment and subcatchment details (affects all case studies in this subcatchment) Site Edit site 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) Average bankfull channel depth category Average bankfull channel depth (m) Mean discharge category Mean annual discharge (m3/s) Average channel gradient category Average channel gradient Average unit stream power (W/m2) Project background Edit project background Reach length directly affected (m) 8585 m <br />0.085 km <br />8,500 cm <br /> Project started 2012/01/02 Works started Works completed Project completed 2012/09/21 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 Investigation and design Stakeholder engagement and communication Works and works supervision Post-project management and maintenance Monitoring Reasons for river restoration Edit reasons for restoration Mitigation of a pressure Impoundments (not hydropower) Hydromorphology Biology Physico-chemical Other reasons for the project Measures Edit Measures Structural measures Bank/bed modifications Larinier fish pass Floodplain / River corridor Planform / Channel pattern Other Non-structural measures Management interventions Social measures (incl. engagement) Other Monitoring Hydromorphological quality elements Edit Hydromorphological quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Biological quality elements Edit biological quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Physico-chemical quality elements Edit Physico-chemical quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Any other monitoring, e.g. social, economic Edit Other responses Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Monitoring documents Upload monitoring documents Additional documents and videos Upload additional documents Additional links and references Edit links and references Link Description Supplementary Information Edit Supplementary Information