Case study:Mill Brook, Tattenhall, Cheshire

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Location: 53° 7' 10.62" N, 2° 46' 3.67" W

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Project overview

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Status	Complete
Project web site	http://www.therrc.co.uk/sites/default/files/projects/7_millbrook.pdf
Themes	Flood risk management, Habitat and biodiversity, Hydromorphology, Social benefits
Country	England
Main contact forename	Duncan
Main contact surname	Revell
Main contact user ID
Contact organisation	Environment Agency
Contact organisation web site	http://www.gov.uk/government/organisations/environment-agency
Partner organisations	Bolesworth Estate, Tattenhall Wildlife Group
Parent multi-site project
This is a parent project encompassing the following projects	No

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Project summary

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This was a habitat creation scheme (Photo 1) which incorporated innovative, Natural Flood Management (NFM) techniques along 230m of Mill Brook, upstream of Tattenhall near Chester (Map 1). This partnership project with the Bolesworth Estate and Tattenhall Wildlife Group created 1.5ha of priority reedbed and wet grassland habitats within a new excavated floodplain area. The project helps attenuate flood peaks and reduces risk downstream in Tattenhall. The North West Regional Flood and Coastal Committee allocated £13,500 of funding to this scheme from the North West 'Slowing the Flow' project. Key facts: 1.5ha of priority habitats created, wider and improved riparian zone and wildlife corridor: reduced diffuse agricultural pollution leading to reduced sediment input and improved water quality: helping to meet Water Framework Directive objectives; increased floodwater storage upstream and flood peak attenuation, which slows the flow of the brook, leading to some flood risk reduction benefits to the downstream village of Tattenhall

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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) Project started 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