Case study:River Wandle: Butter Hill Phase 1

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Location: 51° 22' 13.42" N, 0° 9' 35.44" W

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Project overview

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Status	Planned
Project web site
Themes
Country	England
Main contact forename	Dave
Main contact surname	Bartlett
Main contact user ID
Contact organisation
Contact organisation web site
Partner organisations	Wandle Trust, Wild Trout Trust, Sutton County Council
Parent multi-site project
This is a parent project encompassing the following projects	No

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Project summary

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Reduction in height of three weirs and habitat creation in preparation for the reintroduction of a population of Wandle Trout. Fish pass on Butterhill Mill. In-stream diversity, weir adjustment and habitat connectivity. Fish pass on large weir sluice. Failing WFD for fish pass due to impassible nature of the river, and the prime trout habitat in the area is currently inaccessible. A lack of native trout and suitable connected habitat. Designing for low flow and climate change. Previously deculverted and restored stretch of the Wandle ecologically isolated by the weir at Butter Hill Mill

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Catchment and subcatchment Select a catchment/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) 360 m0.36 km <br />36,000 cm <br /> Project started 2009/01/01 Works started Works completed Project completed Total cost category Total cost (k€) Benefit to cost ratio Funding sources 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 Hydromorphology Biology 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