Case study:Stainby Road, Colsterworth

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Location: 52° 48' 0.97" N, 0° 37' 32.29" W

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Project overview

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Status	Complete
Project web site
Themes	Habitat and biodiversity
Country	England
Main contact forename	Gail
Main contact surname	Talton
Main contact user ID	User:N/A
Contact organisation	Environment Agency
Contact organisation web site	http://eastmercia.org/
Partner organisations	Environment Agency
Parent multi-site project	yes
This is a parent project encompassing the following projects	No

October 2023 just after construction

Project summary

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This project was delivered by East Mercia Rivers Trust on land owned by Buckminster Estates. Although the Upper Witham which flows through the site had retained a meandering course, the river had become very disconnected from its floodplain with very little gravel in the channel. The aim of the project was to improve the river’s connectivity with the floodplain and in the process, enhance both river and floodplain habitat across the site. This was achieved by the lowering of areas of floodplain across the site and the introduction of limestone gravel riffles and point bars. The selective addition of woody material at certain locations further improved habitat.

A backwater was created along with floodplain ponds and the enhancement of spring tributaries from the valley sides allowed the creation of ground water fed scrapes. All material removed from the valley bottom was landscaped on the valley sides outside of the floodplain and planted with wildflower seed.

Monitoring surveys and results

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Project is very recent so just establishing. We have baseline data for fish and river habitat survey as well as detailed drone topo. Post monitoring work will commence from 24 on wards.

Lessons learnt

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Allow plenty of time for the development and delivery of a large project such as this where the ecological window for delivery is very limited. Involve all stakeholders at the earliest possible stage of development. Due to the sensitivity of the site, archaeology was a major factor and where this is the case adequate funding should be accounted for to the help manage this risk. Future management of the site is very important to ensure that high quality floodplain habitats are created. Here, the tenant farmer will continue with low density, conservation cattle grazing. The project was carefully designed to not back up any water onto the field immediately upstream.

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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