Project Summary
Coffey delivered the reconstruction of the Grange Service Reservoir, originally built in 1903 within a sandstone quarry. The project involved the replacement of the existing structure with a new watertight service reservoir, ensuring long-term capacity, resilience, and improved operational safety.
Project Description
The works comprised demolition and disposal of the original reservoir, followed by the design and construction of a new 9,800m³ service reservoir. The new structure included a reinforced concrete floor slab, columns and roof, semi-structural sprayed concrete walls, access platforms, waterproofing, external landscaping, and full electrical, mechanical, instrumentation and telemetry installations. Structural design was sub-contracted to a trusted supply chain partner, while the MEICA design was carried out in-house.
Coffey was recognised with the June 2014 Competitive Tender Star Performer Award by United Utilities for outstanding management of this project.
Scope of Works
The works included:
- Demolition and disposal of the existing reservoir.
- Construction of a new 9,800m³ watertight reinforced concrete service reservoir.
- Installation of sprayed concrete walls, reinforced floor slab, columns and roof.
- Provision of access platforms, waterproofing and landscaping works.
- Electrical, mechanical, instrumentation and telemetry installations.
Technical Highlights
- Innovative redesign of the valve chamber, relocating it within the reservoir footprint to avoid a 9m deep excavation, reducing cost and health & safety risks.
- Development of an alternative joint detail at the base of sprayed concrete walls, replacing hydrophilic strips with a robust water bar system.
- Increased sprayed concrete thickness at the base for additional strength and durability.
- Seamless integration of MEICA design in-house with structural design by a trusted partner.
Added Value
- Significant cost savings and reduced programme risk by eliminating the requirement for a deep external valve chamber excavation.
- Improved long-term durability through innovative sealing solutions.
- Collaboration with supply chain partners and in-house teams ensured efficient delivery and high-quality results.
Environmental, Safety or Community Measures
- Careful demolition and disposal of original materials to minimise environmental impact.
- Landscaping works carried out to integrate the new structure into the surrounding environment.
- Safer construction approach by avoiding deep excavation, reducing risks to the workforce and disruption to the community.
To learn more about Coffey’s work in water and wastewater management, or to discuss future opportunities, please contact us at 091 844356 or info@coffeygroup.com.
