Case study:Abbey Brook Weir

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Location: 52° 59' 13.60" N, 3° 11' 11.70" W

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Project overview

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Status	Complete
Project web site
Themes	Fisheries, Habitat and biodiversity, Hydropower
Country	Wales
Main contact forename	Richard
Main contact surname	Lucas
Main contact user ID
Contact organisation	Welsh Dee Trust
Contact organisation web site	http://www.welshdeetrust.com/
Partner organisations
Parent multi-site project
This is a parent project encompassing the following projects	No

Before and after weir removal on the Abbey brook

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Catchment and subcatchment Select a catchment/subcatchment Edit the catchment and subcatchment details (affects all case studies in this subcatchment) Catchment River basin district Dee River basin Upper Dee Subcatchment River name Eglwyseg Area category 10 - 100 km² Area (km2) Maximum altitude category 500 - 1000 m Maximum altitude (m) 562562 m <br />0.562 km <br />56,200 cm <br /> Dominant geology Calcareous Ecoregion Great Britain Dominant land cover Heather Waterbody ID GB111067052080 Site Edit site Name Abbey Brook at Llangollen WFD water body codes GB111067052080 WFD (national) typology WFD water body name Eglwyseg Pre-project morphology Impounded Reference morphology Sinuous, Step-pool Desired post project morphology Heavily modified water body No National/international site designation Local/regional site designations Protected species present No Invasive species present No Species of interest Salmon, Sea trout (Salmo trutta) Dominant hydrology Dominant substrate River corridor land use Intensive agriculture (arable), Improved/semi-improved grassland/pasture, Woodland 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 2011/08/01 Works started Works completed Project completed 2011/11/01 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 Barriers to fish migration Hydromorphology Biology Physico-chemical Other reasons for the project Measures Edit Measures Structural measures Bank/bed modifications Rock ramp construction, Creation of fish passes 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