Case study:Lewisham College weir

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Location: 51° 28' 31.11" N, 0° 1' 21.75" W

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Project overview

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Status	Planned
Project web site
Themes	Fisheries, Habitat and biodiversity
Country	England
Main contact forename	Peter
Main contact surname	Gray
Main contact user ID
Contact organisation	Environment Agency
Contact organisation web site	http://www.gov.uk/government/organisations/environment-agency
Partner organisations
Parent multi-site project
This is a parent project encompassing the following projects	No

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Project summary

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Options for removal or modification/lowering to increase fish passage and create intertidal habitat upstream. Lewisham College half tide weirs at top of Deptford Creek. Concrete raised channel above, intertidal mudflat of creek below. Barrier to fish migration at low states of tide and overtops at high water.

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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 Thames River basin London Subcatchment River name Ravensbourne (Catford to Deptford) Area category 100 - 1000 km² Area (km2) Maximum altitude category 100 - 200 m Maximum altitude (m) 132132 m <br />0.132 km <br />13,200 cm <br /> Dominant geology Calcareous Ecoregion Great Britain Dominant land cover Urban Waterbody ID GB106039023270 Other case studies in this subcatchment: Broadway Fields/ Seagers Distillary, Catford Greyhound Stadium, Cornmill Gardens (QUERCUS), Ladywell Fields (QUERCUS), Ladywell Fields Phase 2, Ladywell Fields to Cornmill Gardens, Ladywell Fields toeboarding, Linear Park, QUERCUS Ravensbourne, Ravensbourne Tescos... further results 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 Adjacent development/Defra WFD-fish passage funding/EA 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