Case study:Stony Stratford Sluices Bypass Channel

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Location: 52° 3' 8.83" N, 0° 51' 22.44" W

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Project overview

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Status	Complete
Project web site
Themes	Fisheries, Habitat and biodiversity, Hydromorphology
Country	England
Main contact forename	Rob
Main contact surname	Clapham
Main contact user ID	User:Robclapham
Contact organisation	Environment Agency
Contact organisation web site
Partner organisations	Milton Keynes Park's Trust
Parent multi-site project
This is a parent project encompassing the following projects	No

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Project summary

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The Great Ouse between Milton Keynes and Buckingham is a section of river that has historically suffered deterioration in, part due to the number of man-made structures on the watercourse. Following floods, these large structures prevent re-colonization of displaced fish and impound the river, reducing flows and sediment movement, with impacts on habitat quality and diversity.

To mitigate these pressures, a partnership project was formed by the Environment Agency and Milton Keynes Parks Trust. The works installed a fish friendly flow control structure at the upstream end of a previously disconnected paleo-channel allowing water to flow through it and around Stony Stratford Sluices which are currently impassable to fish.

Monitoring surveys and results

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Electric Fishing surveys to be carried out in the first summer following completion.

Lessons learnt

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Catchment and subcatchment Select a catchment/subcatchment Site Edit site Name Stony Stratford WFD water body codes GB105033037920 WFD (national) typology WFD water body name Ouse (Buckingham to Cosgrove) Pre-project morphology Well defined paleo channel. sinuous. Uniform bed roughness. Reference morphology Desired post project morphology Sinuous with variable bed features Heavily modified water body Yes National/international site designation Local/regional site designations Protected species present No Invasive species present Yes Species of interest Dominant hydrology Dominant substrate Clay River corridor land use Improved/semi-improved grassland/pasture Average bankfull channel width category 2 - 5 m Average bankfull channel width (m) Average bankfull channel depth category 0.5 - 2 m Average bankfull channel depth (m) Mean discharge category 0.1 - 1.0 m³/s Mean annual discharge (m3/s) Average channel gradient category more than 0.1 Average channel gradient Average unit stream power (W/m2) Project background Edit project background Reach length directly affected (m) 250250 m <br />0.25 km <br />25,000 cm <br /> Project started 2014/04/01 Works started 2016/03/13 Works completed 2016/03/31 Project completed 2016/03/31 Total cost category 50 - 100 k€ Total cost (k€) Benefit to cost ratio Funding sources WFD GiA, FCRM GiA, Milton Keynes Parks Trust Cost for project phases Phase cost category cost exact (k€) Lead organisation Contact forename Contact surname Investigation and design 1 - 10 k€ Fishtek Consulting Adam Fryer Stakeholder engagement and communication Less than 1 k€ Milton Keynes Park's Trust Rob Riekie Works and works supervision 50 - 100 k€ AMCO Post-project management and maintenance 1 - 10 k€ Milton Keynes Park's Trust Monitoring Less than 1 k€ Environment Agency Rob Clapham Reasons for river restoration Edit reasons for restoration Mitigation of a pressure Impoundments (not hydropower) Hydromorphology longitudinal connectivity, substrate conditions Biology Fish Physico-chemical Other reasons for the project Measures Edit Measures Structural measures Bank/bed modifications 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