Bewl Water Reservoir Siphon Installation
Project: Bewl Water Reservoir Safety Improvement Programme
Temporary Works Design & Marine Construction Engineering
Project Highlights
Three 1.7m diameter siphon pipelines
£45 million reservoir safety programme
Part of Southern Water's emergency drawdown improvements
Project Overview
TILT Engineering & Design provided specialist temporary works design and marine construction engineering support for the installation of three large siphon pipelines at Bewl Water Reservoir, Kent.
The works formed part of Southern Water's £45 million reservoir safety improvement programme, designed to increase the reservoir's emergency drawdown capacity and improve long-term resilience.
Working alongside the marine contractor, TILT developed a series of practical engineering solutions that enabled the safe installation of the large diameter pipelines from floating pontoons within the reservoir.
The Challenge
Installing 1.7-metre diameter steel siphon pipes within a live reservoir required a carefully coordinated temporary works strategy.
As construction progressed, installation methods evolved, requiring continual engineering support to adapt lifting arrangements, floating pontoons, guide systems and winch frames while maintaining safe construction practices.
Every engineering decision had to consider operational safety, constructability and the stability of floating plant throughout the installation sequence.
Our Solution
Rather than providing a single design package, TILT worked closely with the contractor throughout the construction programme, delivering responsive engineering support as the works developed.
Our involvement included:
Temporary works design
Linkflote pontoon arrangements
Steel gantry design for winch systems
Pipe installation sequencing
Guide rail modifications
Winch frame redesign
Lift beam design
Pipe restraint arrangements
Mooring system design
Marker buoy anchoring systems
Formwork design
Multiple barge stability assessments
Technical reviews
Design Risk Assessments (DRA)
Site engineering support
Ongoing response to construction queries
Engineering solutions were continually refined throughout the project to accommodate changing site conditions and construction requirements.
Engineering Services Provided
✔ Marine Construction Engineering
✔ Temporary Works Design
✔ Barge Stability Assessments
✔ Structural Steel Design
✔ Marine Lifting Engineering
✔ Mooring Design
✔ Construction Engineering Support
✔ Design Risk Assessments
✔ Technical Reviews
✔ Site Support
The temporary works developed by TILT supported the successful installation of three large siphon pipelines within Bewl Water Reservoir as part of a nationally significant reservoir safety improvement scheme.
By working collaboratively with the contractor throughout construction, our engineers were able to respond quickly to evolving site requirements, providing practical engineering solutions that helped maintain programme while supporting safe installation operations.
The project demonstrates TILT's capability to deliver specialist marine construction engineering on complex infrastructure projects where temporary works, floating operations and structural engineering must work seamlessly together.