Central Interceptor Wastewater Tunnel Project
Sector: Water Supply and Storage • Location: Auckland, New Zealand
Source: Engineering News-Record (ENR)
A 16.2-km, 4.5-m diameter wastewater tunnel in Auckland, New Zealand, designed to reduce wet weather overflows into Waitematā and Manukau Harbors by 80%. The tunnel doubles as a massive underground reservoir with a storage capacity of over 200,000 cubic meters. The project includes two pipe-jacked sewers, 19 drop shafts and access shafts, connecting sewers, chambers, control facilities, air treatm
- Status
- Under Construction
- Sector
- Water Supply and Storage, Tunnel
- Location
- Auckland, New Zealand
- Updated
- 22 Jul 2026
- Source
- Engineering News-Record (ENR)
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Project Information
Participants
| Not available for this record. |
Status
Original status | under construction |
Taiyo status | Under Construction |
Taiyo last update | 2026-07-22 |
Contact
| Not available for this record. |
Description
Description | A 16.2-km, 4.5-m diameter wastewater tunnel in Auckland, New Zealand, designed to reduce wet weather overflows into Waitematā and Manukau Harbors by 80%. The tunnel doubles as a massive underground reservoir with a storage capacity of over 200,000 cubic meters. The project includes two pipe-jacked sewers, 19 drop shafts and access shafts, connecting sewers, chambers, control facilities, air treatment facilities, and a wastewater pumping station with dual cell diaphragm wall. |
Original sector | Water & Dams |
Budget |
Location
Country | New Zealand |
City | Auckland |
Source
Source | Engineering News-Record (ENR) |
URL |
More Details
Record type | Project |
Sector | Water Supply and Storage, Tunnel |
Article published date | 2026-04-25 |
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