New Flood Protection Initiative Unveiled in Tonbridge and Hildenborough
A significant £42 million flood alleviation project has been inaugurated, enhancing flood protection for residential properties, businesses, and vital services in Tonbridge and Hildenborough. The initiative features an expanded Leigh flood storage area alongside a new embankment scheme in Hildenborough, collectively reducing the flood risk for 1,870 homes and 575 businesses. Additionally, communities situated further downstream along the River Medway are set to benefit from improved flood resilience.
The capacity of the Leigh flood storage area has been increased by approximately 23 per cent. By elevating the maximum water level at the control structure by 55 centimetres, the enhanced facility can now accommodate around 7.4 million cubic metres of floodwater, which is equivalent to approximately 2,880 Olympic-sized swimming pools. This expansion is particularly crucial in light of the escalating challenges posed by climate change, which is leading to more frequent and severe storms, as well as exceptionally wet winters.
Strengthening Community Resilience Against Climate Change
The project not only bolsters the structural integrity and reliability of the flood management systems but also ensures continued flood risk reduction for the next five decades. The original Leigh flood storage area, which was completed in 1982, has been instrumental in safeguarding downstream communities, having been activated 75 times to mitigate flood risks since its inception.
Simon Curd, the flood-risk manager for the Environment Agency in Kent, remarked on the importance of this investment: “This is a major investment in the safety and resilience of communities along the River Medway. The original Leigh flood storage area has protected Tonbridge and Hildenborough for more than 40 years, but climate change necessitates our preparedness for increasingly severe storms and wetter winters.” He further emphasised the complexity of the engineering work undertaken, which was completed while ensuring the flood storage facility remained operational.
Local Leaders Highlight the Importance of Flood Management
Jamie Henderson, Kent County Council’s cabinet member for environment, coastal regeneration, and public health, underscored the devastating impact of flooding on people’s lives and businesses. He stated, “Investments like this are vital. The expanded Leigh flood storage area and new Hildenborough defences will furnish enhanced protection for communities across the Medway catchment, safeguarding hundreds of homes and businesses for years to come.”
Moreover, Cllr Matt Boughton, Leader of Tonbridge and Malling Borough Council, expressed pride in the council’s investment of half a million pounds towards the upgrade of flood defences. He remarked, “This initiative will result in greater protection and resilience for our residents, towns, villages, and local economy, defending our community from rising waters.” He emphasised the project’s success in providing both engineering improvements and local employment opportunities.
Engineering Innovations and Community Benefits
The engineering team executed the three-year project while maintaining the operational status of the flood storage area. The installation of new 12.5-tonne gates, fabricated off-site and assembled on location, exemplifies the project’s innovative approach. These gates were lifted into position using a 300-tonne crane, supported by new lifting and electrical systems designed to facilitate easier maintenance.
In addition to flood protection, the project included environmental considerations, such as the construction of an eel pass to aid the passage of this protected species. The flood defences in Hildenborough are designed to work in tandem with the expanded storage area, addressing the flood risk posed by the River Medway backing up into the Hawden Stream. The Hildenborough scheme features a 98-metre embankment, a new pumping station, and a sheet-piled wall, collectively mitigating the risk of flooding without exacerbating conditions elsewhere.
Lasting Impact and Community Engagement
Throughout its construction, the flood management project generated over £23.7 million in social value, including 4,000 volunteer hours dedicated to environmental and community initiatives across Kent and Sussex. Additionally, 25 young individuals gained work experience, with five subsequently joining VolkerStevin’s graduate apprentice programme. The initiative also provided over £10,000 in donations and support to local community organisations and charities, contributing to various environmental activities.
Residents are encouraged to assess their flood risk, register for flood warnings, and create personal flood plans to enhance preparedness. The Leigh flood storage area, located between Leigh and Penshurst, consists of a 1.3-kilometre-long, 5-metre-high earth embankment and a control structure comprising three steel gates, effective in reducing peak river levels in vulnerable communities.
Collaboration and Future Outlook
This £42 million project is a product of collaborative efforts involving the Environment Agency, Tonbridge and Malling Borough Council, Kent County Council, and the Kent and Medway Economic Partnership. The funding breakdown reflects a comprehensive approach to flood management, with contributions from various entities ensuring the project’s viability.
As climate change continues to pose significant challenges, the recent extreme weather events underscore the necessity for robust flood management systems. The project is expected to provide over £155 million in benefits to downstream communities, reinforcing the region’s resilience against future flooding incidents.