Case study:Borrowash fish pass

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Location: 52° 54' 6", -1° 23' 58"
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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
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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Lessons learnt

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Image gallery


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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Catchment and subcatchment

Catchment

River basin district Humber
River basin Derbyshire Derwent

Subcatchment

River name River Derwent from Bottle Brook to R Trent
Area category 1000 - 10000 km²
Area (km2)
Maximum altitude category 100 - 200 m
Maximum altitude (m) 150
150 m
0.15 km
15,000 cm
Dominant geology Calcareous
Ecoregion Great Britain
Dominant land cover Arable and Horticulture
Waterbody ID GB104028053240



Other case studies in this subcatchment: Darley Abbey Fish Pass Project


Site

Name Borrowash
WFD water body codes GB104028053240
WFD (national) typology
WFD water body name River Derwent from Bottle Brook to R Trent
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

Reach length directly affected (m) 85
85 m
0.085 km
8,500 cm
Project started 2012/01/02
Works started
Works completed
Project completed 2012/09/21
Total cost category
Total cost (k€) 770
770 k€
770,000 €
Benefit to cost ratio
Funding sources 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

Mitigation of a pressure Impoundments (not hydropower)
Hydromorphology
Biology
Physico-chemical
Other reasons for the project


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

Element When monitored Type of monitoring Control site used Result
Before measures After measures Qualitative Quantitative

Biological quality elements

Element When monitored Type of monitoring Control site used Result
Before measures After measures Qualitative Quantitative

Physico-chemical quality elements

Element When monitored Type of monitoring Control site used Result
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Before measures After measures Qualitative Quantitative


Monitoring documents



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Supplementary Information

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