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	Upper Witham Restoration
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.

Image gallery

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Newly installed Lincs Limestone Gravel Feature

Post construction October 2023

New channel form post construction

New Ground Water Fed Wetland.

Pre project habitat photo.

Catchment and subcatchment Select a catchment/subcatchment Edit the catchment and subcatchment details (affects all case studies in this subcatchment) Catchment River basin district Anglian River basin Witham Subcatchment River name Upper Witham Area category 10 - 100 km² Area (km2) Maximum altitude category Less than 100 m Maximum altitude (m) 4646 m <br />0.046 km <br />4,600 cm <br /> Dominant geology Calcareous Ecoregion Great Britain Dominant land cover Arable and Horticulture Waterbody ID GB105030056760 Other case studies in this subcatchment: Aubourn Rock Ramp and Habitat Works, Belton Floodplain Reconnection and River Restoration, Dysart Park, Grantham Habitat Improvement, Grantham Blue Green - Urban Reach, Little Ponton, Manthorpe Floodplain Reconnection, Papermill Weir Section in-channel restoration, River Witham Great Ponton, Syston and Barkston Restoration, Upper Cringle Floodplain Restoration Project... further results Site Edit site Name Stainby Lane Colsterworth WFD water body codes GB105030051570 WFD (national) typology WFD water body name Witham - Headwaters to confluence of Cringle Brook Pre-project morphology Meandering planform but with very poor connectivity and no gravel. Reference morphology Lower Cringle Brook - Very well connected floodplain. Wood and gravel abundant. Desired post project morphology Floodplain connectivity improved, gravel and wood added. Heavily modified water body No National/international site designation Local/regional site designations Protected species present Yes Invasive species present No Species of interest Native Crayfish / Brown Trout Dominant hydrology Ground Water Fed but quite responsive due to modifications. Dominant substrate Pre project - Clay and fine silts. River corridor land use Grazed - Cattle. 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) 13001,300 m <br />1.3 km <br />130,000 cm <br /> Project started Works started Works completed Project completed Total cost category 100 - 500 k€ Total cost (k€) 318318 k€ <br />318,000 € <br /> Benefit to cost ratio Funding sources EA, Anglian Water Cost for project phases Phase cost category cost exact (k€) Lead organisation Contact forename Contact surname Investigation and design 1 - 10 k€ 3030 k€ <br />30,000 € <br /> East Mercia Rivers Trust Gail Talton Stakeholder engagement and communication Works and works supervision 100 - 500 k€ East Mercia Rivers Trust Gail Talton Post-project management and maintenance Monitoring East Mercia Rivers Trust Gail Talton Reasons for river restoration Edit reasons for restoration Mitigation of a pressure Land drainage Hydromorphology Biology Fish Physico-chemical Phosphate Other reasons for the project Measures Edit Measures Structural measures Bank/bed modifications Bank Lowering, gravel and wood added Floodplain / River corridor Ground water fed wetlands Planform / Channel pattern In-set floodplains created, bend widening, bank reprofiling. Other Non-structural measures Management interventions Conservation grazing 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 Project case study. Additional links and references Edit links and references Link Description Supplementary Information Edit Supplementary Information