Central Interceptor, Featured, Installation, New Zealand, News, Tunnelling

WATCH: Central Interceptor Tunnel sneak peek

New Zealand wastewater

Part of New Zealand’s largest wastewater infrastructure project is one step closer to going live, with final welding complete.

The completed 7.6km section one of the Central Interceptor tunnel is set to go live before Christmas 2024.

Now with welding finished, Watercare Services is set to complete touch ups and the final clean because the section and the new pump station head to the testing stage.

Tunnel boring machine (TBM) Hiwa-i-te-Rangi is the remaining TBM left doing tunnelling works. It has tunnelled over 11km since leaving Māngere in August 2021.

The TBM is currently 40m deep underneath Mt Albert and is due to reach the Western Springs shaft in September.

The 4.5m diameter Central Interceptor tunnel runs from Māngere Wastewater Treatment Plant to central Auckland, with two new link sewers collecting flows from west Auckland.

It is the largest wastewater infrastructure project in New Zealand’s history and will significantly reduce wet weather overflows into waterways.

The Central Interceptor project is on track for completion in 2026. By then, it will be fully operational up to Grey Lynn. The Point Erin extension will be commissioned in 2028 when it connects to an upgraded Herne Bay Trunk Sewer.

Watch the video below.

Subscribe to Trenchless Australasia for the latest project and industry news.

Send this to a friend