Case study:East Mascalls Fish Pass

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Location: 51° 0' 43", -0° 3' 18"
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Project overview

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Status Complete
Project web site
Themes Fisheries
Country England
Main contact forename Peter
Main contact surname King
Main contact user ID User:Oartpk
Contact organisation Ouse and Adur Rivers Trust
Contact organisation web site http://www.oart.org.uk
Partner organisations
Parent multi-site project
This is a parent project
encompassing the following
projects
No
East Mascalls Fish Pass In-Situ

Project summary

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This project has seen the pre-fabrication, in HDPE plastic, of a larinier style fish pass which has been installed at one of the thirteen highlighted priority sites for fish passage improvements on the River Ouse in Sussex. Having attempted a "traditional" in-channel construction of the pass in 2012 and 2013 a new approach was needed to overcome constraints on the temporary works detail, the time it would take to install and the general methodology.

Using expertise from Sussex, Suffolk and Holland the pass was designed and delivered so it could be bolted together on site before being lifted into place and bolted down in a day. This approach eliminated the previous constraints and enabled a cost effective solution to be implemented with minimum disruption to the local angling club.

Monitoring surveys and results

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An upstream monitoring point is established and will be re-sampled in 2017 and compared to previous results with details posted online.

Lessons learnt

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Image gallery


Bolting the Pass Together Prior to Installation
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Catchment and subcatchment



Site

Name River Ouse
WFD water body codes
WFD (national) typology
WFD water body name
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)
Project started
Works started
Works completed
Project completed
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Total cost (k€)
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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
Biology Provide a fish pass for wildlife
Physico-chemical
Other reasons for the project


Measures

Structural measures
Bank/bed modifications
Floodplain / River corridor
Planform / Channel pattern Creation of fish passes
Other
Non-structural measures
Management interventions
Social measures (incl. engagement)
Other


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
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Physico-chemical quality elements

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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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