Supporting complex infrastructure upgrades within a live environment
The project
EASE provided site engineering and surveying support for the upgrade of Whitlingham Sludge Treatment Centre in Norwich. The project formed part of a wider £26 million investment in wastewater infrastructure delivered through the @one Alliance on behalf of Anglian Water.
The upgrade was driven by population growth and increased sludge volumes through the WINEP programme. Capacity at the site needed to increase from 20,800 to 26,900 tonnes of dry solids per year.
The works included enabling works, infrastructure upgrades and the installation of two new digesters, alongside improvements to the existing Cambi thermal hydrolysis plant.
EASE supported the programme from early enabling works through to the main construction phases, providing consistent engineering input across the lifecycle of the project.
The role
EASE’s role focused on accurate surveying, setting out and day to day engineering support on site. This covered a wide range of activities, including:
- Demolition of redundant tanks and structures
- Excavation and sheet piling works
- Diversion of underground pipes and services
- Preparation for CFA piling and reinforced concrete works
- Infrastructure preparation ahead of digester installation
The aim was simple. Ensure everything was set out correctly, clearly communicated and ready for the next phase of construction.
Working across multiple stages
The programme involved several overlapping construction phases, each dependent on the accuracy of the previous stage.
Surveying and setting out ensured that demolition, excavation, piling and structural works were positioned correctly from the outset. This allowed follow-on activities, including mechanical installation and infrastructure works, to proceed without delays or clashes.
EASE also supported coordination between civil and mechanical teams. This was particularly important where underground services, structural bases and plant installations needed to align precisely.
A BIM model was used on site to help visualise the scheme and support coordination between trades.
The challenge
The project was delivered within a live treatment facility. This meant all works had to be carefully planned and coordinated to avoid disrupting ongoing operations.
Existing infrastructure added further complexity. Underground services, live tanks and operational systems required a higher level of verification before any work could begin.
One of the most sensitive areas of the project was demolition work taking place next to a live gas holding tank. This created a high-risk environment where vibration levels had to be carefully controlled.
EASE supported this stage by setting up and managing vibration monitoring equipment. This allowed the site team to track activity in real time and ensure works remained within safe limits.
Maintaining accuracy on site
Accuracy was critical throughout the project. Even small errors in setting out or survey data could have led to misaligned structures, clashes between services, or delays caused by rework.
EASE engineers worked closely with site teams to translate design information into clear, practical instructions. This ensured works were carried out to the correct positions and levels.
The team also reviewed models and drawings, feeding back to designers where issues or clashes were identified. This proactive approach helped resolve problems early, before they impacted construction.
As with any complex project, unforeseen challenges arose. These included undocumented services and design clashes. When these occurred, the team responded by surveying the issue, assessing its impact and communicating with the relevant teams to agree next steps.
Quality and documentation
Quality assurance processes followed Anglian Water standards throughout the programme. All works were checked, recorded and verified at each stage.
Accurate as-built records were essential on a live and evolving site. They ensured that each phase of work could proceed with confidence and provided the client with reliable data for future maintenance and operation.
Sustainability and long-term impact
The upgrade contributes to a treatment process where more than 95% of sludge is reused on agricultural land as a soil improver. This supports a more sustainable approach to waste management by returning nutrients to the soil.
Working on an existing site also reduced the environmental impact compared to new-build infrastructure, making better use of existing assets.
Closing the skills gap on site
The project also provided valuable experience for trainee site engineers, supporting the development of the next generation of engineers on live infrastructure projects.
Working across demolition, groundworks, piling and structural phases gave early-career engineers exposure to the full lifecycle of a complex scheme. This helped build confidence in setting out, interpreting drawings and working alongside both civil and mechanical teams.
Being part of an experienced project team also meant trainees could learn in a structured environment, with clear communication and coordination across disciplines. This not only supported day to day delivery, but helped develop practical skills that are difficult to gain outside of live site conditions.
The outcome
EASE’s engineering support helped ensure works were delivered accurately from the outset. This reduced the risk of rework, avoided delays and supported coordination across multiple disciplines.
On a project of this scale and complexity, getting the fundamentals right made a significant difference to overall delivery.
Looking back
One of the strongest takeaways from the project was the importance of clear communication and coordination.
Working within an experienced team, with a clear structure in place, allowed complex activities to be managed effectively. For those involved, it also provided a solid foundation to build on for future projects.
Talk to us about your next project
Looking for a site engineering team that can support your project from start to finish?
We provide a full service package covering surveying, setting out, coordination and quality assurance, helping reduce risk and keep your programme on track.
Speak to our team today. Email info@easeltd.co.uk or call 01603 211808.
