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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Catchment and subcatchment

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Site

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Project background

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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

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Reasons for river restoration

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Mitigation of a pressure	Barriers to fish migration
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Measures

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Structural measures
Bank/bed modifications	rock ramp pool and fish pass construction
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Monitoring

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Monitoring documents

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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)

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Supplementary Information

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