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Macleay Island pipeline replacement

Seqwater is investing $2.5 million to replace a 400m water supply pipeline that runs between Lamb Island and Macleay Island.

Seqwater operates a connected network of water infrastructure including dams, water treatment plants and pipelines to provide a safe, secure and cost-effective bulk water supply to South East Queensland.  

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Home What We're Doing Macleay Island pipeline replacement

Seqwater is working to replace a 400m water supply pipeline that runs between Lamb Island and Macleay Island. A leak was detected close to the Macleay Island side of the water pipeline.

Work to replace the pipeline has commenced. Works will be conducted from 7am to 6pm, Monday to Sunday and may take up to eight weeks to complete, subject to weather and unforeseen delays.

To complete the pipeline replacement, Seqwater will need to temporarily turn off the water supply to residents. This is planned to occur during the night and outside of peak time, at the end of the repair works.

We are committed to minimising the impacts of this work for residents and businesses and will keep the community up to date as the project progresses.

What to expect

Neighbours nearby the construction area will notice work crews onsite from 21 May 2021.

Early work will involve setting up a work site on Lamb Island, for machinery including a drilling rig. 

A trench will be tunnel bored approximately 25 metres under the water for the new pipeline to be installed.

The replacement pipeline will be constructed on Macleay Island and fed through the new 400m hole to Lamb Island.

Drilling work to establish the new pipeline trench is expected to take about eight weeks to complete, weather permitting.

Work crews will be moving around both Lamb and Macleay Islands in utility vehicles from now until the project is completed.

We will work to minimise these impacts where possible.

To complete the pipeline replacement, Seqwater will need to temporarily turn off water supply to Lamb and Macleay Islands in order to switch over to the new pipe.

This is planned to occur during the night and outside of peak time, at the end of the repair works.

The community will be kept informed as the repairs are finalised and confirm a date for the temporary shutdown.

Seqwater and Council are working closely to ensure we minimise any disruptions for the community.

  • Project updates
  • Water supply updates
  • Frequently asked questions
  • Lamb Island laydown site preperations

    Pipeline replacement work underway

    Work to replace the bulk water pipeline between Lamb and Macleay islands is well underway, with drilling investigations now complete.
     

    Seqwater is prioritising the project following the discovery of a leak pipeline under the mudflats of Macleay Island in May.

    Seqwater Chief Operating Officer, Stuart Cassie, said a team mobilised to site as soon as the leak was detected and began investigations and planning for repairs.

    “Seqwater has been monitoring the situation around the clock to ensure the leak does not cause water disruption for the community,” Mr Cassie said.

    “The water pressure within the pipeline remains strong, which means we are delivering on our promise to maintain supply to Macleay Island. All residents can continue their normal water use at this time.”

    Works are occurring seven days a week to create space for the new pipeline to be installed, about 25 metres under water.

    “We need to drill a hole suitable for the new 400mm pipeline to be installed,” Mr Cassie said.

    To complete the pipeline replacement, Seqwater will need to temporarily turn off water supply to Lamb and Macleay Islands in order to switch over to the new pipe.

    This is planned to occur during the night and outside of peak time, at the end of the repair works.

    We will keep the community informed as we finalise repairs and confirm a date for the temporary shutdown.

    Seqwater and Council are working closely to ensure we minimise any disruptions for the community.

     

    Lamb Island laydown site preperations

    Bore drilling and construction noise - Lamb Island

    Seqwater is undertaking work to install a new 400 metre section of pipeline between Lamb and Macleay Islands to support our commitment to a safe, sustainable and efficient SEQ Water Grid.

    Work is expected to take up to six weeks, from late May 2021, to complete, subject to weather and any unforeseen delays.

    What’s happening?

    Seqwater is undertaking work to install a new 400 metre section of pipeline between Lamb and Macleay Islands to support our commitment to a safe, sustainable and efficient SEQ Water Grid.

    Work is expected to take up to six weeks, from late May 2021, to complete, subject to weather and any unforeseen delays. 

    Work hours will be conducted Monday to Sunday from 7am to 6pm. 

    What to expect:

    • a construction site has been mobilized close to the easement near your property
    • use of heavy machinery, such as drill rigs, pumps and trucks
    • bore drilling and trenching which will create noise and dust
    • flashing lights and reversing beepers (for workplace health and safety, these cannot be switched off).

    We are committed to minimising the impacts of this project on local residents and businesses and will continue to keep you up to date as the project progresses. All work sites will be restored at the end of the project.

    Thank you for your understanding as we work to maintain our critical water infrastructure.

  • Water supply updates

    To complete the pipeline replacement, Seqwater will need to temporarily turn off water supply to Lamb and Macleay Islands in order to switch over to the new pipe.

    This is planned to occur during the night and outside of peak time, at the end of the repair works.

    The community will be kept informed as the repairs are finalised and confirm a date for the temporary shutdown.

    Seqwater and Redland City Council are working closely to ensure we minimise any disruptions for the community.

  • Why do you need to replace the pipeline?

    Due to the location of the leak in the pipeline, the decision was made to do a full replacement of the 400m stretch between Macleay and Lamb islands.

    The leak is located about 20 metres off Macleay Island. The pipe is located under the water surface and mud flats making it difficult to access for repairs. Installing a new pipeline ensures a safe and reliable supply of water to residents on Macleay Island.

    Is this related to the previous bursts on Karragarra Island?

    The leak is not related to – or as significant as – pipeline bursts that have occurred on the nearby Karragarra Island in recent years.

    Where is the water sourced from for the Southern Moreton Bay Islands?

    The bulk water pipeline that supplies the Southern Moreton Bay Islands is a single offtake from Russell Island. This water is sourced from a range of locations including North Stradbroke Island and Mt Crosby WTP via the Eastern Pipeline Interconnector (EPI).

    What is Seqwater doing to check and assure the integrity of the water supply to the Southern Moreton Bay Islands before another failure event occurs?

    Seqwater runs a regular maintenance schedule across all of the SEQ Water Grid within which these pipelines belong. Seqwater has a strategic asset management plan for maintaining our assets and minimising unplanned shutdowns.

    Will I lose water supply for this project?

    To complete the pipeline replacement, Seqwater will need to temporarily turn off water supply to Lamb and Macleay Islands in order to switch over to the new pipe.

    When will the water be shut down?

    This is planned to occur during the night and outside of peak time, at the end of the repair works.

    We will keep the community informed as we finalise repairs and confirm a date for the temporary shutdown.

    Seqwater and Council are working closely to ensure we minimise any disruptions for the community.

    Why does the water need to be shut down for the project?

    To be able to finalise the installation of the new pipeline, the flow of water will need to be stopped to ensure a dry work site for the cut in. 

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