Case study:March Burn at Riding Mill

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Location: 54° 56' 47.32" N, 1° 58' 48.19" W

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Project overview

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Status	Complete
Project web site
Themes	Fisheries
Country	England
Main contact forename	Paul
Main contact surname	Atkinson
Main contact user ID	User:NickRRC
Contact organisation	Tyne Rivers Trust
Contact organisation web site	http://tyneriverstrust.org/
Partner organisations
Parent multi-site project
This is a parent project encompassing the following projects	No

mill weir on the March Burn before fish pass installation (picture courtesy of P.Atkinson from the Tyne Rivers Trust)

Project summary

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The ageing mill weir at Riding Mill on the March Burn had become a serious barrier to fish migration. The difference in water levels upstream to downstream was 1000mm. Although large salmon can leap higher than this in certain circumstances, the very shallow water and the wide weir crest meant that the weir was virtually impassable.

In the summer of 2012 the Tyne Rivers Trust undertook work to improve fish passage. At this site electro fishing had highlighted poor salmon numbers and lower species diversity upstream of the obstruction. Following public consultation and using funding from DEFRA, contractors set about installing a full width rock ramp fish pass. This involved retaining the existing weir crest, with the addition of a series of rock ramps. The result is a series of pools constructed with 180 tonnes of stone which reduce the single large leap into several small cascades which are much more easily negotiated by all types of fish. Around 18 miles of river above the weir have become more accessible thanks to the work. Broomhaugh and Riding Parish Council had spent more than £10,000 on repairing the weir in the last decade alone. The River Restoration Centre would like to thank Paul Atkinson from the Tyne Rivers Trust for providing the information and photographs for this case study.

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Image gallery

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mill weir on the March Burn before fish pass installation (picture courtesy of P.Atkinson from the Tyne Rivers Trust)

mill weir on the March Burn after fish pass installation (picture courtesy of P.Atkinson from the Tyne Rivers Trust)

Catchment and subcatchment Select a catchment/subcatchment Edit the catchment and subcatchment details (affects all case studies in this subcatchment) Site Edit site Name WFD water body codes WFD (national) typology WFD water body name Pre-project morphology Reference morphology Desired post project morphology Heavily modified water body National/international site designation Local/regional site designations Protected species present Invasive species present 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 Edit project background Reach length directly affected (m) Project started 2012 Works started Works completed Project completed 2012/08/31 Total cost category 10 - 50 k€ Total cost (k€) 4100041,000 k€ <br />41,000,000 € <br /> Benefit to cost ratio Funding sources DEFRA, Broomhaugh and Riding Parish Council 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 Barriers to fish migration Hydromorphology Biology Physico-chemical Other reasons for the project Measures Edit Measures Structural measures Bank/bed modifications rock ramp pool and fish pass construction Floodplain / River corridor Planform / Channel pattern Other Non-structural measures Management interventions Social measures (incl. engagement) 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 Supplementary Information Edit Supplementary Information