Case study:River Leith Restoration Project, Thrimby, Penrith, Cumbria

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Location: 54° 34' 35", -2° 41' 10"
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Project overview

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Status Complete
Project web site http://www.edenriverstrust.org.uk/
Themes Fisheries, Habitat and biodiversity, Land use management - agriculture, Monitoring, Water quality
Country England
Main contact forename Joanne
Main contact surname Backshall
Main contact user ID User:JoanneBackshall
Contact organisation Eden Rivers Trust
Contact organisation web site http://www.edenriverstrust.org.uk
Partner organisations Environment Agency, Natural England
Parent multi-site project

Case_study:Cumbria River Restoration Strategy

This is a parent project
encompassing the following
projects
No
Aerial view of remeandered River Leith at Thrimby, Penrith, Cumbria

Project summary

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The River Eden River Restoration Strategy (RERRS) is a partnership project involving Eden Rivers Trust, the Environment Agency and Natural England, working with land owners and farmers. It aims to return rivers in the Eden catchment to a more natural state for the benefit of wildlife and people. It was developed as a remedy for the unfavourable condition of large parts of the River Eden and Tributaries Site of Special Scientific Interest.

A straightened section of the River Leith at Thrimby Hall near Penrith was returned to its original meandering course with about 280 m of straightened channel now being 0ver 350 m long. This site is a demonstration of river restoration techniques and the many benefits that this approach can bring to wildlife and people.

Monitoring surveys and results

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- Pre-restoration aerial and ground surveys, to be repeated in 2015.

Lessons learnt

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The River Restoration Centre conducted an evaluation of this and other Cumbria River Restoration Strategy projects during 2015 and the report of their findings is available on the RRC website.


Image gallery


Aerial view of remeandered River Leith at Thrimby, Penrith, Cumbria
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Catchment and subcatchment

Catchment

River basin district Solway Tweed
River basin Eden and Esk

Subcatchment

River name River Leith
Area category 10 - 100 km²
Area (km2)
Maximum altitude category 200 - 500 m
Maximum altitude (m) 368
368 m
0.368 km
36,800 cm
Dominant geology Calcareous
Ecoregion Great Britain
Dominant land cover Improved grassland
Waterbody ID GB102076070900



Site

Name River Leith Restoration Project
WFD water body codes GB102076070900
WFD (national) typology Calcareous
WFD water body name River Leith
Pre-project morphology
Reference morphology
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
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

Reach length directly affected (m) 280
280 m
0.28 km
28,000 cm
Project started 2014/03/03
Works started
Works completed
Project completed 2015/11/02
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

Mitigation of a pressure
Hydromorphology Channel pattern/planform
Biology
Physico-chemical
Other reasons for the project


Measures

Structural measures
Bank/bed modifications
Floodplain / River corridor River naturalisation, Remeandering
Planform / Channel pattern
Other
Non-structural measures
Management interventions
Social measures (incl. engagement)
Other Work with farmers and land managers, Survey work


Monitoring

Hydromorphological quality elements

Element When monitored Type of monitoring Control site used Result
Before measures After measures Qualitative Quantitative

Biological quality elements

Element When monitored Type of monitoring Control site used Result
Before measures After measures Qualitative Quantitative

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

Element When monitored Type of monitoring Control site used Result
Before measures After measures Qualitative Quantitative


Monitoring documents



Additional documents and videos


Additional links and references

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Supplementary Information

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