New dock gates installed at Bristol Port in major boost to West of England flood defences

A significant milestone has been reached in the West of England’s flood defence efforts, with the installation of new, higher dock gates at Avonmouth Port.

This crucial upgrade is part of the Avonmouth Severnside Enterprise Area (ASEA) Ecological Mitigation and Flood Defence Project, a transformative initiative designed to protect the region from rising flood risks.

Once complete in 2026-27, the 17 km of flood defences will shield 2,500 homes and businesses from tidal flooding, while unlocking 12,000 new jobs across the West of England.

Bristol City Council, South Gloucestershire Council, and the Environment Agency are leading the ASEA project, contributing a total of £6.8 million towards the new gates. BPC managed the procurement and installation, engaging a specialist company in the Netherlands to manufacture the gates, which serve both navigational and flood protection purposes.

The previous gates, which were nearing the end of their operational lifespan, formed the main entrance to Avonmouth Port. The new gates have been designed to meet the latest flood defence standards, capable of withstanding a 1 in 200-year tidal flood event, with allowances for rising sea levels due to climate change.

New dock gates closed at Bristol Port

The Port was delighted to work with their established provider, Ravestein, to design, fabricate and install these gates. Meeting the specified requirements, the gates enable vessels to move in and out of the dock and provide a rigid, immovable defence against flood tides.”

New dock gates open at Bristol Port.

Councillor Andrew Brown, Chair of the Economy and Skills Committee at Bristol City Council, said: “In partnership with the Environment Agency and South Gloucestershire Council, we are making significant investments in flood defences at Bristol Port. These new gates, alongside the wider ASEA project, will provide robust flood protection for at least 60 years. This initiative is crucial for Bristol’s economic future, giving businesses the confidence to invest in the Enterprise Area and helping to create new jobs.”

In addition to flood protection, the ASEA project will also create over 80 hectares of wetland habitats at Northwick and Hallen, providing essential roosting sites for wildlife. This equates to an area roughly the size of 112 football pitches, supporting the region’s ecological diversity.

The ASEA project is largely funded through the West of England Local Enterprise Partnership’s Economic Development Fund, managed by the West of England Combined Authority, with additional support from Defra and the Wessex Regional Flood and Coastal Committee.

When complete, the ASEA flood defences will ensure continued safety for residents and businesses, while driving economic growth and protecting the local environment.

The ASEA project team and BPC team visit the new dock gates