Prospect South to Macarthur (ProMac)

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Under the ProMac project we are building new drinking water pipelines and infrastructure between Prospect South and Macarthur as part of Sydney Water's long-term plan to extend the city’s water capacity and supply.

ProMac will upgrade our existing water reservoirs at Liverpool, Cecil Park and Currans Hill as well as build two new reservoirs at Oran Park. This will allow for an extra 100 Megalitres of additional reservoir capacity in Western Sydney. That’s the equivalent of about 50 Olympic-sized swimming pools!

We’re also building 15 km of additional pipework, three pumping stations and upgrading our existing network to ensure growing communities in South Western Sydney have access to clean drinking water.

Sydney Water is investing in new infrastructure that will support the growing, dynamic South Western Sydney.

ProMac will help Sydney Water deliver on its vision of creating a better life with world-class water services.

Under the ProMac project we are building new drinking water pipelines and infrastructure between Prospect South and Macarthur as part of Sydney Water's long-term plan to extend the city’s water capacity and supply.

ProMac will upgrade our existing water reservoirs at Liverpool, Cecil Park and Currans Hill as well as build two new reservoirs at Oran Park. This will allow for an extra 100 Megalitres of additional reservoir capacity in Western Sydney. That’s the equivalent of about 50 Olympic-sized swimming pools!

We’re also building 15 km of additional pipework, three pumping stations and upgrading our existing network to ensure growing communities in South Western Sydney have access to clean drinking water.

Sydney Water is investing in new infrastructure that will support the growing, dynamic South Western Sydney.

ProMac will help Sydney Water deliver on its vision of creating a better life with world-class water services.

  • Cecil Hills - extended Saturday work hours commence from July until September 2023

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    As part of the Prospect to Macarthur (ProMac) program we are building a new water pumping station and new water pipelines within our Liverpool Reservoir facility to provide drinking water services for 84,000 new homes in the South West Growth Area and Western Sydney Aerotropolis Growth Area.

    The contractor has completed the installation of all civil, electrical and mechanical work at the Liverpool Reservoir site in preparation for the final stages of construction. The final stages of work will commence from Monday 10 July 2023, weather permitting.

    To meet critical project milestones, we will be working extended Saturday hours from 8 am to 5 pm from Saturday 15 July until 30 September 2023 (refer to map overleaf for location of work).

    Location of work


  • Cecil Hills and Bonnyrigg - nightwork to commence along Cowpasture Road

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    Construction of the new water pumping station inside the Liverpool Reservoir facility is nearly complete. We are currently completing commissioning activities to bring the facility into operation.

    As part of the work, we need to decommission the existing Bonnyrigg Water Pumping Station along Cowpasture Road, between Cecil Hills and Green Valley. This work will take 16 weeks to complete between Saturday 15 July and Monday 30 October 2023, weather permitting.

    We will notify you if there will be interruption to your water supply.


    This work will involve

    • work inside the Bonnyrigg Pump Station within standard work hours
    • excavations along council verge on the west end of Rodeo Drive within standard work hours
    • excavations parallel to Cowpasture Road outside of standard work hours at night
    • commissioning works on Rodeo Drive outside of standard work hours at night
    • installation of new electrical cables
    • restoration of all impacted areas.

    Location of work

  • Cecil Hills - night work to occur inside new pump station at Liverpool Reservoir facility, week commencing Monday 5 June 2023

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    As part of ProMac we are building a new water pumping station at the Liverpool Reservoir facility in Cecil Hills.

    Upcoming work

    We are currently undertaking commissioning activities to bring the new pump station into operation. As part of this work, we have been testing the newly installed pumps inside the facility. A portion of this testing will need to be completed at night between 9 pm to 7 am from Monday 5 June to Friday 9 June 2023.

    There will be minimal noise impacts and no interruptions to your water services while we complete this work.

    This work will involve

    • flushing water through newly installed pumps outside of standard work hours (refer to map overleaf for location of testing)
    • monitoring noise output
    • operating lights at the site outside of standard work hours
    • vehicle and worker movements around the site outside of standard work hours.

    Standard work hours

    • 7 am to 6 pm Monday to Friday
    • 8 am to 1 pm Saturday. We will not work on Sundays or Public Holidays.


    Location of work

  • Mount Annan - re-chlorination plant delivery outside of standard work hours, Tuesday 16 May 2023

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    We are building a new re-chlorination plant at our Narellan South Reservoir site at Mount Annan, to improve the management of water quality for our customers.

    Upcoming work

    The re-chlorination plant has been built off site and is now ready to be delivered in three units. A crane will arrive to site during standard work hours on Monday 15 May 2023.

    Due to busy road conditions during the day, we will need to transport the re-chlorination plant units outside of standard work hours. The units will be transported to site using three heavy vehicles on Tuesday 16 May 2023 between 2 am and 7 am, weather permitting.

    The heavy vehicles will park on site with the delivery until work can commence during our standard construction hours.

    Our standard work hours

    • 7 am to 6 pm Monday to Friday
    • 8 am to 1 pm Saturday. We will not work on Sunday or Public Holidays.

    This work will involve:

    • a crane mobilising to the site during standard construction hours
    • multiple oversized construction vehicles entering the site outside of standard construction hours
    • unloading the re-chlorination plant using a crane during standard construction hours.

    Construction traffic and impacts

    There will be an increase in construction traffic around Mount Annan during this activity (refer to map overleaf). Residents can expect to see truck and crane movements along Mount Annan Drive, Swansona Avenue, Commelina Drive, Moyengully Avenue and Indigofera Circuit (northern access route).

    Location of work


  • Oran Park/Cobbitty - extended weekend hours at Oran Park Reservoirs site, May to September 2023

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    As part of foundation works in preparation for construction of the new Oran Park Reservoirs, our contractor Vaughan Civil has completed site establishment and commenced concrete piling.

    Upcoming work

    Extended weekend hours will occur from Saturday 6 May 2023 until 30 September 2023 to complete piling and concrete works. Refer to map overleaf for location of work.

    As works progress, we may need to complete night work. We will notify you before this occurs.

    Extended weekend hours

    • 7 am to 6 pm Saturday and Sunday. These hours are additional to our standard work hours.

    Standard work hours

    • 7 am to 6 pm Monday to Friday
    • 8 am to 1 pm Saturday. We will not work on Public Holidays.

    Construction traffic and impacts

    Heavy vehicles will enter the site via our northern access road (off The Northern Road). Heavy vehicles will exit the site via our southern access road (off Brundson road). Refer to map overleaf.


    Location of work

  • Cecil Hills - project update, Cecil Hills Pumping Station

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    As part of ProMac, we are building a new water pumping station at the Liverpool Reservoir facility in Cecil Hills.

    Since our April newsletter update, we have completed pre-commissioning activities for the pumping station. This involved testing of pumps, fans and motors inside the pumping station, as well as pressure testing and disinfection of the newly installed pipe work.

    Upcoming work

    We are now ready to start commissioning activities to bring the new facility into operation. This work will be completed over 12 weeks from Monday 8 May 2023.

    This work will involve:

    • disinfecting and flushing pipework at the new pumping station facility
    • connecting the new pumping station to the live Sydney Water network
    • pumping water from the new Cecil Hills pumping station to the Bonnyrigg and Cecil Park Reservoirs intermittently throughout the day.

    Once the facility is operational, the pumps will facilitate water flow day and night, intermittently. The pumping station is lined with sound absorbing material and when commissioning is complete, a door will be installed on the pumping station to further minimise operational noise.

    What you need to know

    There will be no interruptions to your water services while we complete this work. All work associated with the new reservoir, pumping station and pipework will not affect the supply of water pressure to your property.

    Location of work


  • Cecil Hills - returning to Prince Close to complete valve replacement. No road closures.

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    In Cecil Hills, we installed 1.95km of new water main. As part of this work, we installed a valve in the grass verge along Prince Close in 2021 to control water flow across the Sydney Water network. In February 2023, we completed critical maintenance work on the valve. Investigation work determined that the valve will need to be replaced.

    Upcoming work

    From Monday 1 May 2023, we will return to the same location to complete a full replacement of the valve. This work will take up to two weeks to complete, followed by a further one week of testing and commissioning, weather permitting. Please see map overleaf for the location of work.

    There will be no interruptions to your driveway access or water service during this work.

    Traffic changes

    As we complete this work, traffic control will be used to assist with the management of traffic, however no road closures are planned along Prince Close. A small crew of workers will park on the grass verge off the corner of Prince Close and Sandringham Drive. Refer to map for location of parking.


    Thank you for your cooperation and patience during this essential work.

    Location of work

  • Oran Park - next stage of construction to commence at Oran Park Reservoirs site from Monday 27 March 2023

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    As part of the Prospect to Macarthur (ProMac) program we are building two new water reservoirs in Oran Park to provide drinking water services for 84,000 new homes in the South West Growth Area, Western Sydney Aerotropolis Growth Area, Liverpool CBD and Menangle Park.

    Upcoming work

    The contractor has completed the installation of all civil, electrical and underground pipe works at the Oran Park Reservoir site in preparation for the next stage of construction.

    The next contractor plans to start establishing site facilities to commence ground improvement works from Monday 27 March 2023, weather permitting (refer to map overleaf for location of work).

    This work will involve:

    • establishing a site compound and storage areas
    • using earth moving machinery
    • concrete works
    • drilling and pouring concrete piles below ground level
    • transporting natural material using heavy vehicles
    • restoring the impacted area.

    Construction traffic and impacts

    Heavy vehicles will continue to enter and exit the site via two access points located off Dick Johnson Drive and The Northern Road (refer to map for location of work).

    Our work hours

    • 7 am to 6 pm Monday to Friday
    • 8 am to 1 pm Saturday. We will not work on Sundays or public holidays.

    We may need to work outside of our standard hours from time to time, but we will notify you before this occurs.


    Location of work

  • Harrington Park - extended hours of work

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    Sydney Water are building a new water pumping station on The Northern Road in Harrington Park.

    As part of this work, we are continuing installation of steel materials to construct the new pumping station. Between Friday 17 February and Friday 3 March 2023, we will work five shifts outside of our standard work hours to complete crane lifting activities between 7 am and 8 pm, weather permitting.


    Standard work hours

    • 7 am to 6 pm Monday to Friday
    • 8 am to 1 pm on Saturdays


    This work will involve:

    • deliveries via heavy vehicles
    • lifting oversized precast concrete components into place using a crane
    • heavy machinery and vehicle movements
    • using construction equipment with reversing beepers.


    Location of work

  • Currans Hill - crane mobilisation and steel deliveries to begin from Friday 17 February 2023

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    Site establishment is complete and we are now ready to start constructing the new reservoir.

    A crane will be transported to site on Friday 17 February 2023. It will remain at the site until project completion.

    From Monday 20 February 2023, we will start transporting steel components into the site.

    This work will involve:

    • grinding, cutting of steel and hammering steel panels into place
    • transport of components using large heavy vehicles
    • transport of a crane on the back of a heavy vehicle
    • lifting sections of panels with the use of a crane.

    Construction traffic and impacts

    There will be an increase in truck movements while large deliveries are transported into the site, outside of peak hours. Delivery trucks will continue to use the route approved by Camden Council, via Turner Road, Ascot Drive and Manooka Road.

    Most workers will park within the Sydney Water site, with about 10-12 people on site at a time. Some visitors to site may occasionally park in nearby streets.


    Location of Currans Hill Reservoir

Page last updated: 06 Sep 2024, 11:36 AM