North Lakes Wastewater Pipeline Upgrade Project

Unitywater's project contractor, Eastoli Civil Construction, has been hard at work and we are pleased to advise stage one of three is now complete on the North Lakes Wastewater Pipeline Upgrade Project.

Thanks to the understanding and patience of residents in Sundown Circuit and the local area, the crew has been able to take the time required using the 'push n pull' construction methodology.

This is a smart alternative methodology combining trenching and micro tunneling. This technique requires careful digging down on either side of the residential driveways and micro tunneling underneath them, creating less impact on the drive ways and for the home owners and dwellers.

We have an exciting update about the North Lakes Wastewater Pipeline Upgrade Project, and we want to share a great example of how teamwork, community feedback, and creative problem-solving can make all the difference.

A project that's built on listening

When we first introduced the North Lakes Wastewater Pipeline Upgrade Project to the local community, we encountered some concerns from residents—particularly about the traditional trenching method that would run through their driveways. Understandably, the idea of having their driveways trenched sparked a lot of strong reactions.

As always, we’re committed to being responsive and considerate of community concerns. Through one-on-one engagement with several residents, we realized that a different approach was needed to minimise disruption to their properties while still achieving the goals of the project.

Collaborating for a better solution

Even though Unitywater had already contracted Eastoli Civil Construction to carry out the work, we felt it was important to address the social dilemma and work collaboratively on a solution. After discussing the issue with our contractor, to their credit, they proposed an innovative construction methodology that would avoid the need for trenching through driveways. This was a real win for the project—and for the community.

The push and pull method: a smart alternative

Thanks to the support of Unitywater’s private works engineer, Aidan Breslin, and our contractor’s willingness to think outside the box, a new methodology was suggested: the ‘push and pull’ technique. Here’s how it works: Instead of trenching directly through driveways, we would trench in between driveways and use micro tunnelling to push the old pipe out while simultaneously pulling the new pipe in underneath the driveways.

This method isn’t without its challenges. Micro tunnelling requires precise accuracy under each driveway, making it a more complex process compared to traditional trenching. It also takes longer and costs more upfront. However, after conducting a cost/benefit analysis, our contractor determined that while this method would require more time and investment, the overall cost of the project would remain neutral. This is because micro tunnelling eliminates the need for the significant driveway reinstatement work that was originally factored into the project’s costs.

A positive outcome for all

Ultimately, this collaborative approach allowed us to address the community’s concerns without compromising on the quality and efficiency of the upgrade. The solution also helped build a stronger relationship between Unitywater, the contractor, and the local residents. It’s a great reminder that when we work together and listen closely to the needs of all parties involved, we can come up with creative solutions that benefit everyone.

Moving forward

The North Lakes Wastewater Pipeline Upgrade Project commenced construction in April 2025 and is on track for completion by end of June 2025.

Thank you to everyone involved for your dedication to finding innovative solutions and for your ongoing commitment to delivering quality outcomes for our communities.

Residents from Sundown Circuit and nearby streets in the boutique North Lakes development joined Unitywater's project engineer and principal contractor representatives from Eastoli Civil Construction, for a coffee and croissant before construction commenced on the 330 metre wastewater pipeline upgrade.

The informal gathering in the parkland adjacent to Sundown Circuit was an opportunity for residents to ask questions, make suggestions and learn more about the upgrade project. It also provided Unitywater with the privileged opportunity to better understand any concerns the locals had about the upcoming project and troubleshoot solutions together.