Abergeldie joins celebrations to mark the completion of the Central Interceptor project

The completion of New Zealand's largest wastewater infrastructure project has been celebrated with events bringing together Watercare, mana whenua, project partners, government representatives and stakeholders to acknowledge the successful completion of the works and the collective effort behind this critical infrastructure project. The Central Interceptor will help improve the health of Auckland’s waterways while creating a legacy for local communities. 

Delivered by the Ghella Abergeldie Joint Venture (GAJV) for Watercare, the Central Interceptor involved the construction of a 16.2-kilometre, 4.5-metre-diameter wastewater tunnel stretching from Herne Bay to the Māngere Wastewater Treatment Plant, reaching depths of up to 110 metres beneath Auckland and passing under the Manukau Harbour. The project also delivered major upgrades to Auckland's wastewater network, including 100 network sewer work packages, a new pump station and rising main system to support network integration and transfer to the Māngere Wastewater Treatment Plant, as well as significant upgrades at the treatment plant itself. 

The events included a project completion celebration and a Final Blessing ceremony. A key feature of the ceremony was the return of the manea stone from the Ghella Abergeldie Joint Venture (GAJV) to Watercare, symbolising the projects successful completion and the transition from construction to legacy.

Abergeldie CEO, Mark Bruzzone, said the completion of the project marked a significant milestone for Auckland and everyone involved. “The Central Interceptor is a once-in-a-generation infrastructure project that will deliver lasting benefits for Auckland's communities and environment. We are incredibly proud of the role our people have played as part of the Ghella Abergeldie Joint Venture in delivering this highly complex transformative infrastructure project alongside Watercare, mana whenua, our project partners and the many stakeholders who contributed to its success. This achievement reflects years of collaboration, innovation and dedication, and stands as a testament to what can be achieved.”

Environmental stewardship, sustainability, innovation and positive social outcomes were fundamental throughout the delivery of the project. Alongside the critical infrastructure works, the project created opportunities for local employment and training, strengthened community partnerships and delivered lasting benefits for Auckland, its communities and future generations.

The successful completion of the Central Interceptor represents a major milestone in strengthening Auckland's wastewater network, improving environmental outcomes and supporting the region's continued growth.

Click here to learn more about the Central Interceptor project.