The Herne Bay Collector project will connect to the Central Interceptor project and direct wastewater and stormwater to the MÄngere Wastewater Treatment Plant. The project’s scope of works comprises:
- a 2.1-metre diameter, 1.7-kilometre wastewater tunnel, delivered at a depth between nine and 22 metres
- seven main shafts
- three intermediate shafts to connect to existing network infrastructure
- overflow connections to existing engineered overflow points, and
- a control chamber at Pt Erin Park, which will connect the Herne Bay Collector into the Central Interceptor.
Key Dates
| May 2026 | Contract Award |
| 2028 | Expected Construction Completion |
Procurement
| Procuring Agency: | Watercare NZ |
| Successful Tenderer: | Ghella |
| Related contracts: |
PROJECT HISTORY
| Jan 2026 | Watercare announced that Ghella had commenced early works on the project. |
| May 2026 | Watercare has awarded Ghella a contract to design and construct the Herne Bay Collector wastewater tunnel project. The project comprises the delivery of a 2.1-metre diameter, 1.7-kilometre wastewater tunnel, delivered at a depth between nine and 22 metres. |
Estimated Total Cost
(2026)
Sector
Water & Sewerage
Procurement approach
Design and Construct (D&C) |
Location
New Zealand |
Resources
