SAFETY | AUCKLAND CENTRAL INTERCEPTOR


SAFETY MISSION DELIVERS IN AUCKLAND


MORE THAN A Health, safety and wellness together are a major focus for delivery of


Auckland’s Central Interceptor - the largest wastewater project in New Zealand. Project client Watercare’s HS&W Delivery Manager for the project, Shane Tracey, and contractor GAJV’s H&S Manager, Xavier Xarau, describe how the highly engaged approach was developed and the successes achieved


WATERCARE’S CENTRAL INTERCEPTOR – PROJECT BACKGROUND In 2019, Ghella Abergeldie Joint Venture (GAJV), was awarded the contract to build the Central Interceptor, the largest wastewater project in New Zealand’s history. The client is Watercare. The Central Interceptor (CI) will run between the


Māngere Wastewater Treatment Plant in the south of Auckland and Point Erin in the north. The 16.2km-long, 4.5m-diameter tunnel will run between 15m to 110m


deep under the city. Along the route it will connect to the existing wastewater network, which will divert flows and overflows into the tunnel. With another micro tunnel boring machine (MTBM),


CI has also completed boring two smaller ‘link sewer’ tunnels, totalling 4.3km in length. The Central Interceptor will reduce wet weather


overflows into waterways and beaches by up to 80% in some places, helping to make them significantly cleaner.


Above: Watercare’s Auckland Central Interceptor (CI) project sees MTBM breakthrough at Norgrove in April 2024 IMAGES COURTESY OF WATERCARE, GAJV


22 | January 2025


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