Fish pass options and structure passability

We provide expert guidance on identifying and designing effective fish passage solutions, in addition to managing discussions with stakeholders and regulatory bodies and obtaining consents.

Options for fish passes must balance the benefits of any proposed improvements with the need for existing water resource management and flood monitoring and forecasting.

APEM’s experienced team has assessed hundreds of individual structures using state-of-the-art barrier assessment techniques such as WFD111 and detailed modelling. We have also carried out numerous appraisals and feasibility studies for fish passage options at individual sites.

Catchment based approach

In addition we have created or overseen the associated construction designs, both outline and detailed, for approval by the National Fish Pass Panel.

APEM has undertaken numerous projects to assess fish barriers and fish passage options across whole river catchments throughout the UK. We identify potential barriers and provide guidance to prioritise actions at a catchment level.

This allows clients to develop the most cost-effective measures and optimise benefits in line with environmental legislation, such as the Water Framework Directive and Eels Regulations.

Site by site approach

Fish Passes and Barriers

A weir before removal

We recognise that each site’s unique features affect the way fish can navigate a river and that many passage improvements must therefore be bespoke. Our team is experienced in undertaking fish passage assessments and providing solutions for a wide range of sites, including:

  • Gauging stations
  • Hydropower schemes
  • Sluices
  • Pumping stations
  • Culverts
  • Bridge footings
  • Tidal flaps
  • Reservoirs
  • Navigation locks.

Fish pass solutions and monitoring

Our experience allows us to identify cost-effective fish passage solutions at complex and challenging sites. The result is an unrivalled track record of providing solutions at locations such as tidal environments, ecologically sensitive sites, flood risk zones and remote locations.

APEM’s team of experts also carries out monitoring to determine the passability of structures and the effectiveness of fish passes. We design and implement bespoke monitoring programmes, including tagging and tracking studies, to assess the efficiency and performance of fish passage solutions.

If you have any queries, please contact Paul Gratton, principal fisheries scientist.
Alternatively you can email us here. Or call 0161 442 8938.