Kingborough Sewerage Upgrade Project

About the project

The Kingborough Sewerage Upgrade Project will benefit the Kingborough area, both now and for future generations, by consolidating and enhancing the Kingborough sewerage system.

There are three main components to the Project:

  • The Blackmans Bay Sewage Treatment Plant (STP) is being upgraded to centralise waste from local catchments and treat it to a higher standard before it is discharged into the Derwent Estuary.
  • Converting sewage treatment plants at Margate and Electrona to sewage pump stations that will transfer flows to the upgraded Blackmans Bay STP. Decommissioning and closing the Howden Sewage Treatment Plant.
  • Constructing a new pressurised sewer rising main, approximately 15 kilometres in length, that will transfer waste from the pump stations at Electrona and Margate to the upgraded Blackmans Bay STP.

Project benefits

The project represents an investment of $51 million by TasWater and will provide Kingborough with significant long-term benefits, such as improved public health and better quality effluent being discharged into the Derwent Estuary, as well as ensuring our assets deliver reliable service for a growing community over future generations.

The upgrade will:

  • Provide enhanced odour management at the existing Blackmans Bay STP.
  • Improve the quality of the effluent that is discharged into the Derwent Estuary.
  • Provide sufficient capacity for future growth and continuing development within the region.

About the project

The Kingborough Sewerage Upgrade Project will benefit the Kingborough area, both now and for future generations, by consolidating and enhancing the Kingborough sewerage system.

There are three main components to the Project:

  • The Blackmans Bay Sewage Treatment Plant (STP) is being upgraded to centralise waste from local catchments and treat it to a higher standard before it is discharged into the Derwent Estuary.
  • Converting sewage treatment plants at Margate and Electrona to sewage pump stations that will transfer flows to the upgraded Blackmans Bay STP. Decommissioning and closing the Howden Sewage Treatment Plant.
  • Constructing a new pressurised sewer rising main, approximately 15 kilometres in length, that will transfer waste from the pump stations at Electrona and Margate to the upgraded Blackmans Bay STP.

Project benefits

The project represents an investment of $51 million by TasWater and will provide Kingborough with significant long-term benefits, such as improved public health and better quality effluent being discharged into the Derwent Estuary, as well as ensuring our assets deliver reliable service for a growing community over future generations.

The upgrade will:

  • Provide enhanced odour management at the existing Blackmans Bay STP.
  • Improve the quality of the effluent that is discharged into the Derwent Estuary.
  • Provide sufficient capacity for future growth and continuing development within the region.
  • Works on the foreshore below the BBSTP

    11 days ago
    De aeration chamber

    We are currently working on the concrete de-aeration chamber, located on the foreshore below the plant. This chamber allows fully treated waste water from the treatment plant to settle, with any air dispersed prior to release through the outfall.

    There will be a small increase in construction traffic and noise during this work. You may notice a large crane in the BBSTP compound, being used to add a layer of concrete to the existing chamber and to lift equipment in and out. There is scaffolding at the top of the cliff and temporary fencing to prevent public access to the...

    We are currently working on the concrete de-aeration chamber, located on the foreshore below the plant. This chamber allows fully treated waste water from the treatment plant to settle, with any air dispersed prior to release through the outfall.

    There will be a small increase in construction traffic and noise during this work. You may notice a large crane in the BBSTP compound, being used to add a layer of concrete to the existing chamber and to lift equipment in and out. There is scaffolding at the top of the cliff and temporary fencing to prevent public access to the area. Please obey any signage and do not enter the construction zone for your own safety.


  • Margate Sewage Treatment Plant - Dru Point

    2 months ago
    Margate sps excavation concreting   reduced size

    Underground storage tanks - ready to install

    We have now completed the excavation and preparation works required to allow the installation of the two 110 kilolitre fibreglass underground emergency storage tanks.

    These tanks will take any flows as a result of extreme wet weather events or power outage.

    Weather permitting, we expect to install the storage tanks by the end of December.

    Pictured above - concrete pour to create a layer of concrete blinding in readiness for
    placement of additional concrete wells and the two overflow storage tanks.

    Underground storage tanks - ready to install

    We have now completed the excavation and preparation works required to allow the installation of the two 110 kilolitre fibreglass underground emergency storage tanks.

    These tanks will take any flows as a result of extreme wet weather events or power outage.

    Weather permitting, we expect to install the storage tanks by the end of December.

    Pictured above - concrete pour to create a layer of concrete blinding in readiness for
    placement of additional concrete wells and the two overflow storage tanks.
  • Update on progress of construction at the BBSTP

    4 months ago
    Img 0135

    Repurposing of the existing sewage treatment plant is underway. Construction of the Intermittently Decanted Extended Aeration IDEA tanks is now complete as we progress towards commissioning of the plant, which is scheduled to begin from November 2018.

    There are many elements to commissioning. Effectively this will put the new plant into operation and test the components to ensure they operate as intended.

    The plant is expected to be fully commissioned by late-2019 and will provide reliable sewerage services for the coming decade, and improve environmental outcomes for both Kingborough and the Derwent Estuary.


    Repurposing of the existing sewage treatment plant is underway. Construction of the Intermittently Decanted Extended Aeration IDEA tanks is now complete as we progress towards commissioning of the plant, which is scheduled to begin from November 2018.

    There are many elements to commissioning. Effectively this will put the new plant into operation and test the components to ensure they operate as intended.

    The plant is expected to be fully commissioned by late-2019 and will provide reliable sewerage services for the coming decade, and improve environmental outcomes for both Kingborough and the Derwent Estuary.


  • Margate Sewage Treatment Plant - Dru Point WARNING

    4 months ago
    Warning sign 001

    Construction work at the Margate Sewage Treatment Plant has resulted in a reduction in the quality of treated waste water being discharged into this area.

    Swimming and activities that involve direct contact with the water are not recommended.

    We are working with Kingborough Council and the Environmental Protection Authority.


    Construction work at the Margate Sewage Treatment Plant has resulted in a reduction in the quality of treated waste water being discharged into this area.

    Swimming and activities that involve direct contact with the water are not recommended.

    We are working with Kingborough Council and the Environmental Protection Authority.


  • Margate Sewage Treatment Plant - Dru Point

    4 months ago

    Noticeable odour

    As we move into the second phase of works to convert the Margate Sewage Treatment Plant to a pump station, we are now diverting flows from one section of the lagoon to another to prepare for excavation works to allow the installation of underground emergency storage tanks. These tanks will take any flows as a result of extreme wet weather events or power outage.

    Over the course of the next eight weeks residents and recreational users of Dru Point will notice fluctuations in odour as we drain, transfer and remove sludge out of the lagoon. We apologise for...

    Noticeable odour

    As we move into the second phase of works to convert the Margate Sewage Treatment Plant to a pump station, we are now diverting flows from one section of the lagoon to another to prepare for excavation works to allow the installation of underground emergency storage tanks. These tanks will take any flows as a result of extreme wet weather events or power outage.

    Over the course of the next eight weeks residents and recreational users of Dru Point will notice fluctuations in odour as we drain, transfer and remove sludge out of the lagoon. We apologise for the impact and thank you for your ongoing patience as these works continue.

    Please note decaying seaweed along the foreshore, from the jetty to the Beach Road junction, is also contributing to odour in the area.

    Truck traffic

    There will be trucks entering and leaving the treatment plant compound as the sludge removal works take place. To ensure safe access to the dog walking track, the entrance to the compound will be controlled during works.

    Work hours are between 7am and 6pm from Monday to Saturday. Work may also take place on Hobart Show Day, Thursday 25 October 2018.

    For your safety, please ensure you obey all signage and directions from traffic management in the area.

    Pump station works

    We had anticipated work on the pump station and underground storage tanks would be further advanced by now, however due to unexpected construction scheduling changes, this work will now continue into 2019.

    There will be no interruption to your sewerage service.

  • Upgrade to Sewage Pump Station ā€˜Eā€™ (SPS E) as part of the Kingborough Sewerage Upgrade Project

    6 months ago
    Sps e   intial conrete works   august 2018   small

    TasWater contractors are currently conducting works at SPS E, near Lady Penrhyn Drive, Blackmans Bay.

    What changes are being made to the lagoon?

    The lagoon within the compound will continue to be used as emergency overflow storage, which may be required during extreme wet weather events and as a result of power outages.

    The lagoon will be lined with concrete which will lessen the impact on the environment by preventing seepage and effectively containing any emergency flows that require temporary storage in the lagoon area.

    Odour control measures

    Additional odour control measures will be added including an odour...

    TasWater contractors are currently conducting works at SPS E, near Lady Penrhyn Drive, Blackmans Bay.

    What changes are being made to the lagoon?

    The lagoon within the compound will continue to be used as emergency overflow storage, which may be required during extreme wet weather events and as a result of power outages.

    The lagoon will be lined with concrete which will lessen the impact on the environment by preventing seepage and effectively containing any emergency flows that require temporary storage in the lagoon area.

    Odour control measures

    Additional odour control measures will be added including an odour control unit and vent stack.

    For more information on odour control units and vent stacks check out this FAQ sheet.

    Concrete works

    Concrete pours began Monday 13 August 2018, and include the movement of up to 10 concrete trucks a day for a period of about two weeks, weather dependant, as we proceed to line the lagoon area with concrete.

    Concrete trucks and construction vehicles will access the site from the TasWater access road on Lady Penryhn Drive.

    Work hours are between 7am and 6pm from Monday to Saturday. Construction activity will not occur outside of these hours, except in rare exceptional circumstances. You may notice truck movements and people on site prior to 7am as they prepare for the day.

    As with any construction site there will be occasional inconveniences such as construction traffic, noise and dust, please be assured we are endeavouring to complete works in a timely manner.

    There will be no interruption to your sewerage service while these works are underway.

    For more information please contact Community Engagement Officer, Cassandra Wells on 13 6992 or email enquiries@taswater.com.au.


  • Margate Sewage Treatment Plant - Dru Point

    7 months ago
    De sludging in progress   compressed

    TasWater contractors are currently conducting works at the Margate sewage treatment plant, Dru Point. This work will see this treatment plant converted to a pump station that will transfer flows to the upgraded Blackmans Bay sewage treatment plant.

    The two lagoons will be drained and rehabilitated. Half of one of the drained and rehabilitated lagoons will be repurposed to be used as emergency overflow storage which may be required during extreme wet weather events and as a result of power outages. This will result in better environmental outcomes for North West Bay.

    What happens to the lagoons?

    The first phase...

    TasWater contractors are currently conducting works at the Margate sewage treatment plant, Dru Point. This work will see this treatment plant converted to a pump station that will transfer flows to the upgraded Blackmans Bay sewage treatment plant.

    The two lagoons will be drained and rehabilitated. Half of one of the drained and rehabilitated lagoons will be repurposed to be used as emergency overflow storage which may be required during extreme wet weather events and as a result of power outages. This will result in better environmental outcomes for North West Bay.

    What happens to the lagoons?

    The first phase of works to the lagoons required earthworks to prepare for de-sludging (removal of the contents of the lagoon). Two excavators and a tip truck sectioned the lagoons into smaller portions.

    Each section of the lagoon was then progressively drained and pumped into road tankers which then transport the sludge to be reused on farmland in line with Tasmanian Biosolids Reuse Guidelines 1999.

    The picture at the top of this page shows the de-sludging works in progress.

    Conversion to a pump station

    While the work to remove sludge from the lagoons takes place we are also undertaking construction to install the sewer pump station. This involves deep excavation required to install a pre-fabricated concrete well within which the pumps will operate.

    Underground storage tanks

    Further excavation work is required to allow the installation of two underground emergency storage tanks (pictured below). The tanks are made of fibreglass, each with a storage capacity of 110 kilolitres.
    These tanks will take any flows as a result of extreme wet weather events or power outage. Any additional overflow will be captured in the repurposed lagoon.

    Further construction and the installation of these tanks will occur over the coming months. Work on the pump station and underground storage tanks will continue until late 2018.

    How will the area look once works are complete?

    TasWater is in discussions with Kingborough Council regarding the future use of the area. At this stage the area will remain fenced once works are complete. Residents and recreational users of Dru Point will be able to use the area in the same manner as they do now.

    There will be no interruption to your sewerage service while these works are underway.

    For more information please contact Community Engagement Officer, Cassandra Wells.