Success for Mott MacDonald Bentley at the ICE East Midlands Merit Awards

The Mott MacDonald Bentley (MMB) team behind the Witches Oak Raw Water Abstraction and Wetlands scheme took home the Climate Mitigation and Adaptation Award at the annual ICE East Midlands Merit Awards, while design lead Tanya Donkin was named Regional STEM Ambassador of the Year.

On behalf of Severn Trent, Mott MacDonald Bentley (MMB) has delivered a ground-breaking scheme at Witches Oak Raw Water Abstraction and Wetlands, bringing an abandoned water resource back into use to improve the resilience of drinking water supplies during future droughts. At a series of former gravel pit lakes near the River Trent, the project is increasing raw water supply through the recommissioning of infrastructure alongside innovative, low-carbon, nature-based solutions.

MMB has delivered floating treatment wetlands across the lakes to act as the first stage of treatment, using natural biological processes to remove pollutants such as ammonia and suspended solids and reduce reliance on energy-intensive methods. Mimicking self-sustaining riparian habitats (those next to rivers or streams), the wetlands provide a resilient, low-maintenance solution while supporting biodiversity and habitat creation.

As the first application of its kind at scale in the UK, Witches Oak demonstrates how nature-based solutions can be integrated into operational water infrastructure, showcasing how a low-carbon solution can directly improve water quality. Through close collaboration and community engagement, the scheme provides a sustainable, replicable model for enhancing ecosystems, improving resilience, and reducing reliance on traditional treatment methods.

Commenting on the award, Declan Mawson, director said: “We’re incredibly proud to see the Witches Oak scheme recognised with this award. It’s a powerful demonstration of the vital role nature-based solutions can play in the future of water infrastructure – using innovative, low-carbon approaches to improve water quality, strengthen resilience, and enhance the natural environment. The project is a real testament to the collaboration and expertise across the Severn Trent and MMB team.” 

Alongside project success, MMB design lead Tanya Donkin was recognised as Regional STEM Ambassador of the Year for her outstanding commitment to inspiring the next generation of engineers. Through her extensive involvement in STEM outreach, from leading work experience programmes and supporting schools to engaging with communities and championing industry initiatives, she has made a significant impact across the region.

Reflecting on her award, she said: “I’ve always been passionate about civil engineering, which is why I enjoy taking part in STEM and work experience events to inspire others. It’s such a varied field, but at its core it’s about solving problems, making a difference, and benefiting society.”

Well done to all the winners and finalists.

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Read more about our nature-based solution at Witches Oak Green Recovery