Kawana ocean outfall
Eastoli Civil Engineering delivered the construction of launch and receival pits on the Unitywater Kawana Ocean Outfall Pipeline, facilitating pigging and inline inspection of the 750mm pipeline to assess its condition and future service life.
Project overview
Eastoli Infrastructure Renewals delivered the construction of launch and receival pits on the existing Unitywater Kawana Ocean Outfall Pipeline to facilitate pigging and inline inspection of the 750mm pipeline.
The inspection process used specialised pigging equipment to detect corrosion, cracking, and remaining wall thickness, allowing Unitywater to assess the condition and future service life of the asset.
Scope of works
The launch pit involved excavations up to 5m deep, requiring:
- Large shoring boxes
- Sheet piling
- Dewatering systems
- Protection of adjacent underground assets
Once the existing pipeline was exposed, sections were removed and replaced with new DN750 DICL assemblies, valves, reinforced thrust blocks, and custom fabricated fittings to facilitate pigging and scanning operations.
Cleaning pigs were then launched through the pipeline toward the receival pit.
Launch pit works
Extensive planning and coordination were undertaken to deliver the project safely and within tight deadlines prior to the arrival of overseas scanning specialists.
Works included:
- Traffic and pedestrian management
- Stakeholder communication
- Environmental and safety controls
- Coordination of specialist contractors and equipment
Receival pit works
Due to the site’s proximity to the ocean and neighbouring properties, additional measures included:
- Dewatering spear installation
- Noise mitigation and sound blankets
- Community communication
- Enhanced traffic management
An approximately 16m-long shoring box assembly was installed before excavation and pipeline modifications were completed to facilitate receival of the pigging and scanning equipment.
Restoration and completion
Following completion of the works, both sites were backfilled, compacted, and restored to equal or better condition than prior to construction.
Reinstatement works included:
- Turf and landscaping restoration
- Footpaths, kerbs, and gutters
- Roadways and carparks
The project was successfully delivered safely, efficiently, and within program requirements, enabling critical condition assessment of the Kawana Ocean Outfall Pipeline.
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Delivering infrastructure you can rely on
Eastoli is a reputable civil infrastructure contractor supporting utility companies throughout South East Queensland. Backed by more than 22 years of experience across civil, plumbing and construction, our team delivers end-to-end project solutions, from planning and installation through to commissioning and reinstatement.
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Eastoli is built on integrity and accountability. As a privately owned business, we take personal responsibility for every project, ensuring clients receive direct access to decision makers and a team that genuinely cares about the outcome.
When you work with Eastoli, you work with professionals who understand the industry, respect the environment we operate in, and are committed to delivering infrastructure that supports growing communities.
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The safety of clients and staff is our first consideration. We ensure HSEQ compliance and have a thorough understanding of the legislative requirements. We are 100% committed to the safe delivery of projects. Additionally, our personnel have numerous accreditations which allow us to complete various high risk works.
