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Coombabah Sewage Treatment Plant Upgrade

20250224 234523779 Ios

Project Overview

The Coombabah Sewage Treatment Plant (CSTP), the Gold Coast’s largest facility, treats around 50% of the city’s wastewater. A condition review of Preliminary Treatment Facility A (PTF-A) identified the need for a new PTF-C to support increasing demand and ensure resilience. PTF-C was commissioned to boost capacity while PTF-A is taken offline for review. Once operational, PTF-B and PTF-C together will treat 500,000 EP at 4,000 L/s, ensuring long-term service continuity.

  • Client Acciona AU & NZ
  • Location Gold Coast, QLD
20250225 020926169 Ios
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Scope of Works

CV was appointed to support the expansion of CSTP’s preliminary treatment infrastructure, integrating new utilities with minimal disruption.

Key deliverables:

  • Construction of PTF-C with inlet chamber, screening, grit removal, odour control, and interconnection to existing infrastructure.
  • Reinstatement of Storm Overflow Lagoon return line.
  • Utilities upgrades: potable and service water, compressed air, and fire protection.
  • Installation of low voltage electrical systems.
  • Integration of SCADA and control systems for remote management.
  • Finalisation of civil works including pit and pipe installation.

Innovation & Execution Strategy

To minimise plant disruption and ensure long-term efficiency, CV implemented a robust project delivery strategy:

  • Integrated Design Review – Alignment of new systems with legacy infrastructure through 3D modelling and stakeholder collaboration.
  • Utility Phasing & Redundancy Planning – Works sequenced to allow for continuous treatment plant operation.
  • Modular Electrical Architecture – Engineered switchboards and systems for rapid install and commissioning.
  • Cross-Disciplinary Coordination – Active engagement with mechanical and civil teams to align project staging and delivery.

Outcomes & Impact

  • Enhanced Treatment Capacity: PTF-C provides an additional 250,000 EP capacity to meet current and future community demand.
  • Operational Continuity: Successful integration with live systems while maintaining treatment throughput.
  • Improved Resilience: Infrastructure built to modern standards to support longevity, redundancy and growth.
  • Safety & Compliance: All systems designed and installed to meet regulatory, WHS, and performance criteria.

The CV Difference

With a track record of delivering complex infrastructure in live environments, CV’s Industrial team brings proven capability, precision engineering and collaborative delivery to every project. Our commitment to client outcomes, safety and innovation makes us a trusted delivery partner in the water and wastewater sector.

Client Feedback

“I wanted to take the opportunity to express my appreciation for the excellent work the CV Industrial team delivered on the project.

CV’s professionalism and dedication to high quality electrical install while maintaining an open and collaborative approach, helped contribute to the success of the project.”

– Commissioning Manager, Acciona AU & NZ