Water and Sewerage Major Projects

Howard River Park water main replacement

Power and Water has commenced a program of works to progressively replace the Howard River Park water main to improve water supply to the area.

One section of the main between the corner of Howard Springs and Gunn Point Roads to Sittella Road has already been replaced.

A second stage of works will commence on 6 September for a period of five weeks.

Power and Water will be replacing 220 metres of pipe from the Pressure Reducing Valve pit on Howard Springs Road to the first scour valve on Gunn Point Road, including boring under Gunn Point Road.

A temporary water supply will be installed which will require short outages only.  All residences will receive 48 hours’ notice prior to any scheduled interruption.

While these works are carried out, a pressure monitoring and regulation system will help to regulate peak pressures, reducing the likelihood of further water main bursts.

There will be sporadic interruptions to service while these works are carried out. Advance notice will be provided to residents via planned works notification cards, the Power and Water Facebook page and an SMS notification where possible.

If you have any questions about these works please contact Power and Water on 8924 5268.

Howard East Borefield Upgrade

Power and Water Corporation is working to ensure the sustainability and security of the Darwin region water supply. As part of the Darwin Region Water Supply Strategy, Power and Water is equipping four existing bores within the Howard East Borefield to increase emergency supply capacity.

View the fact sheet for more information.

Darwin CBD Water Supply Enhancement Project

Darwin CBD water supply enhancement - Darwin's central business district is growing rapidly and new water mains are needed to meet demand. Power and Water has installed 1.2 km of pipe along the south side of the Esplanade and Daly Street. Work to place 2 km of mains along Dinah Beach Road, Duke Street, Burt Street, Day Street and McMinn Street with direct drilling under Daly Street Bridge and McMinn Street is now nearing completion. This project will ensure continuing water supply to the CBD, Stuart Park and surrounds.

What it is and why we need it

The Darwin CBD is growing rapidly and new water mains are required to meet demand in the area. These new water mains will provide water to the CBD, Stuart Park and surrounds ensuring Power and Water's service standards are maintained to existing customers while allowing increased development.

Power and Water is undertaking the construction of several major water mains in two stages. The project map gives further detail.

Stage 1: New water main, Esplanade

Stage 1 included installing 1.2 km of 450 mm steel pipe along the south side of the Esplanade and along Daly Street.

Stage 2: New water main, Dinah Beach Road

Stage 2 includes 2 km of 450 mm steel water main along Dinah Beach Road, Duke Street, Burt Street, Daly Street, McMinn Street, McLachlan Street and Mirambeena Street.

Power and Water is working with Darwin City Council and the Department of Construction and Infrastructure to minimise disruptions and plan appropriate traffic controls.

Thrust boring was used to construct the water mains under Daly Street and McMinn Street to minimise disruption to traffic.

Future works

This is part of a broader strategy to meet water demand beyond 2030 in the CBD and adjacent areas. Further works are being programmed.

Larrakeyah outfall closure plan

In May 2012 Power and Water completed works that saw the final closure of the Larrakeyah outfall with flow now being diverted to the Ludmilla Wastewater Treatment Plant.

Work to upgrade Ludmilla Wastewater Treatment Plant, with a three-fold increase in treatment capacity, is finished.

The upgrade provides a much greater ability to cater for wet season flows and also provide for population growth until at least the year 2030.

Project stages

Construction work began in 2008, with four stages:

A regional approach

These works are part of Power and Water’s broader Darwin region sewerage treatment strategy that aims to:

  • provide capacity for a growing population and industry base
  • improve the performance of the region’s wastewater treatment and disposal facilities and
  • reduce potential impacts on the environment from sewerage operations.

The Corporation is also upgrading treatment processes at the Leanyer/Sanderson and Palmerston wastewater treatment plants with works to span over the next five years.

In addition, the Corporation has committed to upgrade sewage treatment at East Arm to support the development of the Marine Services Precinct.

More information

For more information please contact Power and Water on 1800 245 092, email eastpointoutfall@powerwater.com.au or click on the following links:

Palmerston South Elevated Water Tank

As part of its ongoing strategy to secure the water supply for the growing population of the southern suburbs of Palmerston, Power and Water is building a new elevated water tank in Zuccoli, adjacent to the intersection of Lambrick Avenue and the Stuart Highway.

This four mega-litres tank will provide supply to the suburbs of Zuccoli, Johnston, Bellamack and Palmerston South as well as interim supply to areas of Howard Springs. This will ensure Power and Water's service standards are maintained to existing customers while allowing increased development in the area.

The wine-glass design was selected in consultation with City of Palmerston mid-2012 and takes into consideration efficiency in use, cost effectiveness, low maintenance requirements and aesthetic.

See project news updates 29 September 2015 and 8 April 2016.

Raising the full supply level of Darwin River Dam

Raising the full supply level of Darwin River Dam - The full supply level of Darwin River Dam has been increased by 20 per cent with the raising of the dam spillway. This work increased the capacity of the reservoir, which supplies Darwin, Palmerston and surrounding rural areas. The project was completed in 2011 with works on the intake tower.

Darwin River Dam is Darwin's primary potable water source, supplying about 90 per cent of the water for Darwin, Palmerston and surrounds.

Increasing the reservoir's capacity was a two-year project to reinforce the embankment and raise the spillway by 1.3 metres.

This increases the capacity by about 20 per cent, providing additional supply for the growing population.

The pump station and other infrastructure downstream have the capacity to support the additional supply, so raising the spillway at Darwin River Dam was a cost-effective way to meet the increasing demand.

For more information, refer to the frequently asked questions.

Tennant Creek Chlorination

Power and Water is committed to providing high quality drinking water to its customers.

Continuous chlorination provides the most efficient, reliable and cost effective way of providing safe drinking water.  This process is used across Australia and the world. Tennant Creek is the only town in the Northern Territory without continuous chlorination.

Residents and visitors to Tennant Creek deserve the same high quality of drinking water that other Australians enjoy.

Power and Water and the Department of Health have partnered in this initiative to install continuous chlorination for the Tennant Creek community in response to ongoing water quality failures.

Over the past five years there were 48 detections of E. Coli in the Tennant Creek water supply.  The Australian drinking water guidelines required zero E. Coli detection in a safe drinking water supply.

Continuous chlorination brings Tennant Creek in line with all other major towns and centres.

For further information see the links below:

Media releases

Water infrastructure maintenance - Vegetation Management Program

Water Services undertakes programmed vegetation management on Power and Water Corporation's large above ground steel water mains in order to maintain the integrity of Darwin's bulk water system.

The mains are the water lifelines for Darwin and surrounds. Vegetation management and removal is essential to ensure the long term integrity and reliability of the system by reducing water main breaks, leaks and system outages.

There are four key reasons for removing trees and other vegetation from around the water mains:

  1. Trees lift or move the mains pipe causing it to break.
  2. Trees rub against and erode the pipe causing it to burst.
  3. Moisture becomes trapped around the pipe, accelerating corrosion and causing it to burst.
  4. Striking (falling vegetation), damages the pipe, causing the pipe to break.

The work typically begins near Manton Dam and continues along the highway towards the city. Power and Water staff discuss the works with key stakeholders throughout the program's progression.

The scope of the works is as follows:

  • Trees within one metre of the water main are removed.
  • The trees are cut as close as possible to the ground and poisoned.
  • The stumps are then left to rot away.
  • Where possible, we try to leave small shrubs or decorative plants that are not likely to damage the main.

An extensive tree removal program is conducted every decade and each year minor clearing and weed spraying is undertaken.

Adelaide River Water Treatment Plant

Power and Water is constructing a new water treatment plant at Adelaide River to provide a more reliable water supply and improve the quality of drinking water to the township. The plant will be located in the existing Power and Water compound and is expected to be operational by June 2015.

To complement water quality improvements PWC is also cleaning  Adelaide River water mains with a new highly effective and innovative technique called “Ice pigging”.

Water Reuse in the Alice

Water Reuse in the Alice Project - The Alice Springs Water Reclamation Plant, which has won a national Engineers Australia Award, was opened in May 2008 and can recycle up to 600 mega litres of water a year - a valuable resource in the desert town. 

Power and Water Corporation committed $10.4 million to the innovative Water Reuse in the Alice project.

The project stops dry weather overflows from the Alice Springs waste stabilisation ponds into Ilparpa swamp. Rather than letting precious water go to waste, the effluent is recycled so it can be reused.

The project recycles 600 megalitres of water a year and pumps it to the Arid Zone Research Institute where it is stored underground before being used to irrigate horticulture projects, helping create employment and economic opportunities for the region.

For more information, click on the links below: