Project Summary
Coffey undertook the construction of a new 12,500m³ concrete water reservoir adjacent to an existing 5,000m³ structure at Scart. Works also included upgrades to the access road, control building and water treatment facilities, along with major civil and M&E upgrades at Coolcorcoran Pumping Station to maintain and enhance supply capacity during construction.
Project Description
The new reservoir was constructed on a 75mm no-fines concrete layer over 200mm clause 804, with filter drains beneath and around the structure. A composite geotextile/drainage membrane was placed along the reservoir sides prior to backfilling, with stormwater discharged to the public sewer through a 300mm storm drain. Approximately 45,000m³ of shale was excavated, of which 30,000m³ was removed from site and the remainder stockpiled for re-use.
Ancillary works included installation of new centrifugal booster pumps and electrical upgrades at Coolcorcoran Pumping Station, which supplies the reservoir at Scart. These upgrades increased capacity to over 310 l/sec.
Scope of Works
The works included:
- Construction of a 12,500m³ concrete reservoir adjacent to existing infrastructure.
- Installation of drainage layers, filter drains and stormwater discharge system.
- Excavation of approximately 45,000m³ of shale, including removal and reuse.
- Civil and M&E upgrades to Coolcorcoran Pumping Station, including new pumps and electrical supply.
- Installation of two 600mm ductile iron pipes linking new and existing reservoirs.
Interface works with the existing control building, planned in coordination with operations team. - New ducts and chambers for electrical connections to treatment buildings and reservoirs.
- MEICA works including flow control, alarm systems, turbidity analyser, chlorine dosing, SCADA and PLC programming.
- High-quality concrete finishes monitored throughout, with off-site trial panel approved in advance.
- Traffic management and road sweeping to manage material transport and minimise disruption.
Technical Highlights
- Construction of a high-capacity 12,500m³ reservoir adjacent to live operations.
- Significant shale excavation and material management within a constrained timeframe.
- MEICA installation designed and delivered in-house by Coffey.
- High-specification concrete finishes achieved through rigorous quality monitoring.
Added Value
- Careful segregation of live operations to maintain continuity of service.
- Phased shutdowns coordinated with the local authority to minimise disruption.
- Use of in-house MEICA expertise for efficient delivery and integration.
Environmental, Safety or Community Measures
- Reuse of excavated material where possible to reduce waste.
- Traffic management and extensive road sweeping to protect public roads.
- Ongoing liaison with the local authority and operations team to mitigate community impact.
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.
