We are specialists in the design, installation and refurbishment of fish and eel passes, delivering solutions that restore connectivity, meet regulatory expectations and support the long‑term health of river ecosystems.
Our refurbishment and optimisation services elevate the effectiveness of existing assets, improving passage efficiency and extending operational life. This includes structural repairs, entrance and flow optimisation, debris and sediment management, and enhancements to maximise attraction and safe migration.
Every structure we build is tailored to the exact hydraulics, species needs and site constraints to ensure reliable performance, minimise blockages and reduce ongoing maintenance. Every project is considerate of the surrounding environment and delivered to achieve biodiversity net gain.
Case Studies
A new fish counter & eel pass
A complex project in the South West of England, commissioned by the Environment Agency. The project involved the fabrication and installation of an access gantry, fish counter and eel pass, ensuring that fish and eels – an endangered species – are able to pass safely, promoting biodiversity and ensuring the species continues to spawn and thrive.
Every project is delivered with ecology in mind
We enhance assets and the environment to deliver sustainable outcomes for people and our planet.
Driving exceptional outcomes for decades and consistently delivering what we promise, we’re trusted by clients who value our commitment, expertise, and what we stand for.
I am part of the wastewater asset maintenance team, where we support our clients in ensuring their assets comply with government regulations. I am proud of the work I do at Stonbury, which directly contributes to improving water quality, reducing storm overflow discharge and maintaining sustainable tertiary treatment systems.
Derek Allgood
Project Manager
Featured insights
Reconnecting rivers: Langford Weir Fish Pass Construction
Environmental engineering for people and planet
