Case study:River Calder improvement project

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Location: 53° 48' 47", -2° 14' 59"
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Project overview

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Status Complete
Project web site
Themes Habitat and biodiversity, Hydromorphology
Country England
Main contact forename Nick
Main contact surname Elbourne
Main contact user ID User:NickRRC
Contact organisation River Restoration Centre
Contact organisation web site http://www.therrc.co.uk
Partner organisations Ribble Catchment Conservation Trust
Parent multi-site project
This is a parent project
encompassing the following
projects
No
River Calder, downstream of Padiham weir deconstruction

Project summary

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The River Calder Improvement Project, led by the Ribble Catchment Conservation Trust (RCCT), aim to ease the passage of fish species (specifically trout) and encourage upstream migration whilst improving the riverine habitat as a whole. This was achieved by the lowering of existing weirs, fish pass installation and more general habitat enhancement.

Monitoring surveys and results

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Lessons learnt

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Image gallery


Padiham Weir deconstruction
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Montford Weir deconstruction work in progress, September 2010
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Catchment and subcatchment

Catchment

River basin district North West
River basin Ribble

Subcatchment

River name Calder - Pendle Water to conf Ribble
Area category 100 - 1000 km²
Area (km2)
Maximum altitude category 200 - 500 m
Maximum altitude (m) 408
408 m
0.408 km
40,800 cm
Dominant geology Calcareous
Ecoregion Great Britain
Dominant land cover Improved grassland
Waterbody ID GB112071065490



Site

Name Ribble Catchment
WFD water body codes GB112071065490
WFD (national) typology
WFD water body name River Calder
Pre-project morphology Impounded, High width:depth
Reference morphology Sinuous
Desired post project morphology
Heavily modified water body Yes
National/international site designation
Local/regional site designations
Protected species present No
Invasive species present No
Species of interest
Dominant hydrology Artificially regulated
Dominant substrate Silt, Gravel
River corridor land use Urban
Average bankfull channel width category 10 - 50 m
Average bankfull channel width (m)
Average bankfull channel depth category 2 - 5 m
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) 600 m
0.6 km
60,000 cm
Project started 2010/06/01
Works started
Works completed 2010/10/01
Project completed
Total cost category 500 - 1000 k€
Total cost (k€) 940k€
940,000 €
Benefit to cost ratio
Funding sources Ribble Catchment Conservation Trust

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 Reservoir impoundment
Hydromorphology Quantity & dynamics of flow, Width & depth variation, Continuity for organisms
Biology Fish: Abundance
Physico-chemical
Other reasons for the project Bank erosion, Enhance riverine habitat


Measures

Structural measures
Bank/bed modifications Bank stabilisation, Partial weir removal, Cobble placement
Floodplain / River corridor
Planform / Channel pattern
Other
Non-structural measures
Management interventions
Social measures (incl. engagement) 'Trout in the Town' project raising the awareness of the river's value in schools
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
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



Additional documents and videos


Additional links and references

Link Description
http://www.therrc.co.uk/case studies/calder%20improvement%20project.pdf River Restoration Centre Case Study

Supplementary Information

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