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

Domenica our micro-TBM has completed her work. She will be removed from the shaft at Mt Albert War Memorial Reserve and go for refurbishment while a decision is made on her future. She's bored two important link sewers in the western Auckland isthmus: one 3.1km from Mt Roskill to Avondale and the second 1.1km along Meola Creek in Mt Albert. These sewers will take the pressure off ageing infrastructure, with wastewater flows from the west soon to be redirected into the main tunnel. In terms of that main tunnel, Hiwa-i-te-Rangi has completed almost 11km of the 16.2km she will bore in total. She’s broken through into the shaft at Lyon Ave in Sandringham, with Western Springs now in sight.

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.


  • Sun 12 May and Sat 25 May, 10am-2pm: Ambury Farm planting days, Māngere Bridge

  • Sun 19 Apr, all day: MOTAT Live day: Steam

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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