Case study:River Calder improvement project

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Location: 53° 48' 46.98" N, 2° 14' 58.60" W

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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

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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Catchment and subcatchment

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Site

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Name	Ribble Catchment
WFD water body codes
WFD (national) typology
WFD water body name
Pre-project morphology	Impounded, High width:depth
Reference morphology	Sinuous
Desired post project morphology
Heavily modified water body	true
National/international site designation
Local/regional site designations
Protected species present
Invasive species present
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

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Reach length directly affected (m)	600 m0.6 km <br />60,000 cm <br />
Project started	2010/06/01
Works started
Works completed	2010/10/01
Project completed
Total cost category	500 - 1000 k€
Total cost (k€)	750 k€750,000 € <br />
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

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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

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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 rivers value in schools
Other

Monitoring

Hydromorphological quality elements

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quality elements

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

Biological quality elements

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quality elements

Element	When monitored		Type of monitoring		Control site used	Result
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Physico-chemical quality elements

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quality elements

Element	When monitored		Type of monitoring		Control site used	Result
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Any other monitoring, e.g. social, economic

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

Monitoring documents

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Image gallery

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Additional links and references

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Supplementary Information

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