Case study:Darley Abbey Fish Pass Project

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Location: 52° 56' 39", -1° 28' 21"
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Project overview

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Status Complete
Project web site
Themes Environmental flows and water resources, Fisheries, Habitat and biodiversity
Country England
Main contact forename Julie
Main contact surname Wozniczka
Main contact user ID
Contact organisation Trent Rivers Trust
Contact organisation web site
Partner organisations Environment Agency
Parent multi-site project
This is a parent project
encompassing the following
projects
No
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Project summary

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The project aims to provide free upstream and downstream passage for all species of fish at Darley Abbey weir including eel. This will contribute significantly to the waterbody target of Achieving good ecological potential by 2027.

Community involvement - Interpretation panel, launch event, heritage walks, archaeological assessment of medieval timbers excavated, community meetings re archaeology.

Monitoring surveys and results

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Lessons learnt

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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: Borrowash fish pass


Site

Name Darley Abbey
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 International - World Heritage Site
Local/regional site designations
Protected species present No
Invasive species present No
Species of interest
Dominant hydrology
Dominant substrate
River corridor land use
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)
Project started 2012/07/01
Works started
Works completed
Project completed 2015/03/01
Total cost category 100 - 500 k€
Total cost (k€) 450
450 k€
450,000 €
Benefit to cost ratio
Funding sources Defra Catchment Restoration Fund

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 Barriers to fish migration
Hydromorphology Continuity for organisms
Biology Fish
Physico-chemical
Other reasons for the project


Measures

Structural measures
Bank/bed modifications
Floodplain / River corridor
Planform / Channel pattern Creation of fish passes
Other
Non-structural measures
Management interventions
Social measures (incl. engagement) Interpretation boards, Heritage walks, Community consultation, Community Events
Other Film made


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
Before measures After measures Qualitative Quantitative

Any other monitoring, e.g. social, economic

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


Monitoring documents




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Additional links and references

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Supplementary Information

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