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Bespoke Curved Walkways for Twin Settlement Tanks at Wanlip STW
Bespoke Curved Walkways for Twin Settlement Tanks at Wanlip STW
Location: Wanlip Sewage Treatment Works, Leicester
Project Value: Circa £420,000 (Excl. VAT)
Project Overview
In engineering, safe and reliable access is the foundation of every successful operation. Steelway recently completed the design, manufacture and installation of access metalwork at Wanlip Sewage Works, Severn Trent's third largest wastewater facility and the centre piece of its 2025 to 2030 investment period.
Working alongside principle contractor MWH Treatment, we provided perimeter walkways, a central platform and stairs for two new 37m diameter primary settlement tanks.
Challenges Faced
How do you build a walkway that follows a curve of around 116m?
Each support, floor panel and handrail section had to match the radius of its tank and fit precisely around precast concrete walls. The steelwork also needed to integrate seamlessly with other packages on a live, fast tracked works, while withstanding a corrosive wastewater environment.
- Full 3D Design: Our designers modelled the entire arrangement alongside the tanks, pipework and surrounding structures, resolving interfaces before fabrication began.
- Off-Site Manufacture: Components were fabricated at our Wolverhampton works and transported in manageable sections, minimising disruption alongside other contractors.
- Expert Installation: Our own fitters installed the galvanised structure, fitted with tubular handrailing and flooring designed for secure footing in wet conditions.
"Wanlip is a landmark scheme for Severn Trent and the programme left no margin for error. Designing the whole access arrangement in 3D and keeping manufacture in-house meant we could respond quickly to changes on site and deliver steelwork that fitted first time"
Delivering Results
- Safety: Permanent, compliant routes around both tanks and the shared central chamber.
- Efficiency: Prefabricated sections shortened time on the ground and kept pace with a demanding schedule.
- Durability: A corrosion-resistant finish built for long service life with minimal upkeep.
The project not only gave Severn Trent's operators a dependable means of inspecting and maintaining the tanks but also led to a series of follow-on orders through to autumn 2026, a testament to the skill and commitment to everyone involved.
Read More
Discover the story behind the project in more depth, including the technical details, scope and timeline of works.
Download the Wanlip STW case study (PDF)
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