Wellington Cross-Harbour Pipeline


Prospective pipeline

Credibly proposed


Under procurement

Preferred bidder announced

Recently closed
Wellington Cross-Harbour Pipeline

Prospective pipeline

Greenfield (construction) or brownfield (government asset divestment) projects needed or likely to occur within the next five years, but is not formally proposed by a state, territory or major local government.

Credibly proposed

The project or divestment is supported by a state, territory or major local government, is subject to studies or other processes (such as pre-feasibility or scoping studies or business case development), and is likely to proceed to formal announcement.   


The project has a firm commitment and timeline from a state, territory or major local government, but has not yet entered the market.

Under procurement

The project or transaction is under procurement (such as a call for Expressions of Interest, requests for tender, or another offer to the market).

Preferred bidder announced

A preferred bidder has been selected and is in exclusive negotiations.

Recently closed

Projects that have progressed to contractual close remain on ANZIP for 12 months.

ANZIP is focused only on major infrastructure activity, above the following thresholds:


Construction projects: > AUD$300m

Investable greenfield & brownfield: > AUD$100m

New Zealand

All greenfield and brownfield projects and divestments: > NZD $100 million

STATUS: Credibly proposed
VALUE: $110M AUD | $116M NZD
SECTOR: Water & sewerage
TYPE: Greenfield

Project Scope

The Cross-Harbour Pipeline will see construction of an alternative bulk water supply pipeline from the Hutt Valley across Wellington Harbour to Wellington City, improving the resilience of water supply, particularly in eastern and southern suburbs.

The need for an alternative water supply source for Wellington city has long been recognised. This need was heightened by the Canterbury earthquakes of 2010 and 2011. In late 2018, following a two exploratory bore drillings into the harbour floor that found that its undersea aquifer was not suitable to meet Wellington's water resilience goals, the Cross-Harbour Pipeline was confirmed as the best option.

The Cross-Harbour Pipeline project is led by Wellington Water, which manages the region's drinking water, stormwater and wastewater on behalf of the Greater Wellington Regional Council and the region's four cities of Wellington, Porirua, Upper Hutt and Lower Hutt. Greater Wellington Regional Council, which is responsible for the collection and treatment of bulk water and drinking water for the region, is the project funder.

Planning, consent and consultation processes are expected to occur in 2020, with construction indicatively scheduled to commence in 2022 for completion in 2025. As planning and design of the project is carried out, a clearer view of the full project value will become more certain.


Project Timeline

2019: Route planning and design process
2020: Planning, consent and consultation process
2022: Construction starts
2025: Completion


Aug 2018: Greater Wellington Regional Council has committed NZ $116 for the project in its Long Term Plan 2018-28

Project History

Apr 2019: Marine survey in Wellington Harbour to inform on location for the pipeline
Oct 2019: Undersea geotechnical investigations in Evans Bay
Nov 2019: Undersea geotechnical investigations in Lowry Bay
Jan 2020: Undersea geotechnical investigations at Evans Bay and Lowry Bay completed


Further Information

Wellington City Council is responsible for consenting the pipeline infrastructure where it enters the city from Evans Bay and connects to the city network. The project will also serve the needs of the city's homes, insitutitions and businesses.

Hutt City Council is responsible for consenting the pipeline infrastructure from Waiwhetu Aquifer to where it departs at Seaview.

Local iwi Taranaki Whānui ki Te Upoko o Te Ika (Taranaki Whānui) are Treaty of Waitangi partners and have been involved in the decision-making processes.

Last reviewed: 11/02/2020

Presented by

Government sponsors


Supporting agencies