Moa Point Sludge Minimisation Facility

Under Delivery
Moa Point Sludge Minimisation Facility

The Moa Point Sludge Minimisation Facility is a proposed new wastewater treatment facility in Wellington. The project aims to reduce the amount of sewage sludge created though wastewater treatment and transform it into a safe, reusable project while reducing emissions and waste to landfill.

The scope of the project includes:

  • construction of a wastewater treatment plant
  • construction of a three-story processing building, and
  • construction of an anearobic digestion system.

Key Dates

Jul 2023 Contract Award
Nov 2023 Construction Commencement
2026 Expected Construction Completion

Funding contributions

User charges

The project is being funded by Wellington City Council ratepayers through a levy put in place from August 2024 for up to 30 years to collect up to the NZ$400 million estimated total cost. The levy applies to all residential and commercial ratepayers, with properties directly connected to the facility paying a higher levy. 

This approach has been supported by the NZ Government and approved under the Infrastructure Funding and Financing Act 2020 (NZ), with the council collecting the levy on behalf of the special purpose vehicle owned by Crown Infrastructure Partners.


Procuring Agency: Wellington City Council
Successful Tenderer: Joint Venture of HEB and McConnell Dowell


Jun 2022 The preliminary business case for the proposal was approved by Wellington City Council.
Dec 2022 The project received development approval from Wellington City Council.
Jul 2023 A McConnell Dowell and HEB Construction Joint Venture was awarded the contract to deliver the project.
Aug 2023 Site preparation began for construction including hill excavation.
Aug 2023 Wellington City Council gained approval to raise up to $400 million to fund the construction of the facility through the Infrastructure Funding and Financing Act 2020.
Nov 2023 Construction commenced on the project.
Dec 2023 Wellington City Council reached contract close with the Joint Venture of HEB and McConnell Dowell for the third and final stage of the project in December 2023.
Estimated Total Cost
Water & Sewerage
Procurement approach
Traditional Procurement |
New Zealand |
Government resources
Project pages
Wellington City Council