Central Interceptor

A super-sized tunnel that will reduce wastewater overflows into central Auckland waterways

Watch the video: The Central Interceptor's greatest hits so far!

Where are our TBMs now?

Project milestone

Our micro-Tunnel Boring Machine, Victoria, just aced her first 215m drive in Keith Hay Park's brand-new Branch 9B sewer! Starting in a trench seven metres ground, she bore on a gentle slope to finish 10m deep at the drive's end. The sewer links Mount Roskill's existing network to the Central Interceptor main tunnel, reducing discharges into Oakley Creek and setting the stage for future developments. She is now gearing up to head north along Keith Hay Park.

CI discovery centre

Where’s the Discovery Centre?

The Discovery Centre has a fun virtual reality experience, digital and outdoor games and a movie ride as well as lots of project information. Check out the list below of where it will be.


  • Thurs 21: Manawa Christmas Market, Westgate

Why we're building the Central Interceptor

Read about the benefits this super-sized wastewater tunnel will deliver for Auckland

Constructing the Central Interceptor

Find out more about our construction sites

Engaging with our communities

We want to be a good neighbour while our project is underway

Sustainability and environment

On the Central Interceptor project, sustainability is at the heart of all we do

Keep up with us on social

Read about project milestones on Facebook or LinkedIn

Find out more

Read the latest newsletters, media releases and consent documents associated with the project

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