Project

Adelaide River Off-Stream Water Storage

PROJECT STATUS
Detailed Planning
Adelaide River Off-Stream Water Storage

The proposed Adelaide River Off-Stream Water Storage (AROWS) project aims to improve Darwin’s water security by supplying up to 67.5 gigalitres of additional water each year. The project has two components - The Adeaile River Off-Stream Water Storage project, and the Manton Dam Return to Service.

The AROWS component includes construction of a reservoir beside the Adelaide River to capture and store water from the river, and has a development timeframe of seven to 10 years. Major infrastructure components include:

  • two dams and two saddle dams within the AROWS basin
  • pumping infrastructure and pipelines for extraction from Adelaide River
  • a new pipeline from AROWS to Strauss Water Treatment Plant
  • a new Pipeline to Lambells Lagoon agricultural precinct, and
  • completion of the Strauss Water Treatment Plant Stage Two.

The Manton Dam component of the project would restore the site as a source of drinking water, following its closure in 1972, and would take an estimated three to four years to complete. Major infrastructure components include:

  • a new pump station at Manton Dam to pump water to Strauss Water Treatment Plant
  • a new pipeline from Manton Dam to Strauss Water Treatment Plant
  • a new pipeline from Strauss Water Treatment Plant to Middle Arm, and
  • completion of the Strauss Water Treatment Plant Stage One.

 

Funding contributions

Federal Government

The Federal Government committed $2 million in funding for the completion of a business case.

PROJECT HISTORY

Feb 2022 The Federal and Northern Territory Governments released the business case for the Adelaide River Off-Stream Water Storage project, which includes two parts - the AROWS project and the Manton Dam Return to Service project. The combined projects had a benefit cost ratio of 1.0 (at a seven per cent discount rate). The business case identified the Manton Dam component as a short term project with a development timeframe of three to five years. The AROWS project was identified as a long term project with a development timeframe of seven to 10 years.
Estimated Total Cost
(2022)
Sector
Water & Sewerage
Procurement approach
Unconfirmed |
Location
Northern Territory |
Resources