Case Study

Wilmslow WwTW – Civil Engineering Works

WES engaged V J Donegan & Co. Ltd to deliver the civil engineering infrastructure for a new process installation at Wilmslow WwTW. Working safely in a live process environment, we constructed reinforced concrete bases and chambers, delivered containment and access upgrades, and installed ducting and drainage to create a clean, MEICA-ready interface.

Client Scope

United Utilities’ solution for Wilmslow comprises new process equipment facilities, EDM on storm spills, FFT monitoring and a new potable-water system to support the site.

Details

Client: Water Engineering Services (WES), on behalf of United Utilities
Value: £335,000

Services Provided

Piling

General Civil Engineering

Scope of Works

V J Donegan’s solution encompassed:

- Reinforced concrete foundations & slabs for equipment kiosks
  Precision-set RC slabs and upstands built to tight tolerances for “plug-and-play” installation of new process equipment.
- New valve chamber & interconnecting civils
  Construction of the two-way valve chamber with associated excavation, surrounds and backfill, plus the interconnections specified for the process system.
- Containment & bunded delivery area
  Construction of a kerbed, membrane-lined, falls-managed delivery area with speed humps and drainage in order to improve safety and compliance for tanker operations.
- Service trenching, ducting & draw pits
  Trenching for process lines, multi-way duct routes and draw pits to suit WES’s kiosk layouts and future maintenance access.
- Access, reinstatement & handover
  Traffic-management features, neat tie-ins, and reinstatement to leave a MEICA-ready platform aligned to United Utilities’ monitoring and process requirements.

Challenges & how we solved them

- Live-site working, tight footprint
  We sequenced slabs, chambers and services to open safe parallel work-fronts and maintain clear vehicle/pedestrian routes for the WwTW which was still live during construction.
- Interfaces & tolerances
  Early set-out checks with WES ensured bolt patterns, penetrations and duct positions landed first time, reducing on-site assembly and outage windows.
- Deliveries & containment
  The bunded off-loading area with kerb restraint, drainage and traffic calming was designed to streamline deliveries and protect the environment.

Outcome / Client benefits

- A clean, compliant civils platform enabling EDM and FFT monitoring equipment to be installed and commissioned efficiently.
- Safer, quicker deliveries via a purpose-built, bunded delivery area and improved site access.
- Low-disruption build aligned with off-line installation principles to minimise interaction with the live plant.