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

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.

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Padiham Weir deconstruction

Montford Weir deconstruction work in progress, September 2010

Catchment and subcatchment Select a catchment/subcatchment Edit the catchment and subcatchment details (affects all case studies in this 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) 408408 m <br />0.408 km <br />40,800 cm <br /> Dominant geology Calcareous Ecoregion Great Britain Dominant land cover Improved grassland Waterbody ID GB112071065490 Site Edit 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 Edit project background 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€) 940k€940,000 € <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 Edit reasons for 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 Edit 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 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 http://www.therrc.co.uk/case studies/calder%20improvement%20project.pdf River Restoration Centre Case Study Supplementary Information Edit Supplementary Information