Central Interceptor

A super-sized wastewater tunnel that will reduce overflows

Construction of the Central Interceptor is well underway

Over the next six years we’re building the Central Interceptor tunnel to help make Auckland's waterways cleaner. The Central Interceptor will run underground from Grey Lynn to our Māngere Wastewater Treatment Plant. It will have several link sewers and shafts along the route for collecting and transferring wastewater into the tunnel.

Our contractor Ghella Abergeldie Joint Venture (GA) is building the Central Interceptor. GA has more than 150 years’ experience with tunnelling and wastewater projects of this size across the globe.

Once completed, the tunnel will be 14.7 kilometes in length, the longest in New Zealand. At 4.5 metres in diametre, it will be high enough to fit a giraffe and wide enough to fit four rhino side by side.

To find out more about the project, click here to watch our video and see how the Central Interceptor will make Auckland a better place to live.

Benefits to you

Benefits to you
Find out how the Central Interceptor will benefit your community

Community events

Community events
Information about our community days and education programme

Consent documents

Consent documents
All the consent documents associated with the project

FAQs

FAQs
Our answers to frequently asked questions associated with the project

Key facts

Key facts
All the facts and figures about the Central Interceptor project

Meet the team

Meet the team
Get to know the people who are working on New Zealand's longest tunnel

News

News
All the latest news, newsletters and media clippings about the project

Our sites

Our sites
Find out what's happening at our sites across Auckland

Progress in pictures

Progress in pictures
A picture gallery of the project as it takes shape

Keep up with us on social media

Facebook: WatercareNZ
LinkedIn: Watercare Services Limited
 

Mr Whippy was in hot demand at our ‘Meet the Contractor’ event in Keith Hay Park. With construction work beginning at the Park on 17th January 2020, it was a good chance to find out more about our Central Interceptor project. This huge wastewater tunnel will reduce overflows in central Auckland by up to 80 per cent. Around 100 locals dropped by to chat with the Ghella Abergeldie Joint Venture team, Watercare staff and enjoy an ice-cream on us. Kids were fascinated with the mini version of our tunnel boring machine (TBM) and took away cardboard models to build at home. Thanks to everyone who stopped by!