Case study:East Mascalls Fish Pass

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Location: 51° 0' 42.85" N, 0° 3' 18.17" W

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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 & 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

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Bolting the Pass Together Prior to Installation

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 Provide a fish pass for wildlife 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