Orford and Triabunna Water and Sewerage Strategy

The Lower Prosser Dam in flood

TasWater is working to a long-term strategy to prioritise our investment in water and sewerage services for Orford and Triabunna. This ensures money is well spent.

Our management of the area’s water system holds public health and safety as its highest priority, along with environmental management and TasWater’s legal requirements. We work with the State Government, local government, other regulators and our customers, and our approach is informed by a hydraulic model of the area’s systems, and the analysis of weather data and trends.

Orford and Triabunna’s water supplies can be vulnerable to drought, which makes water restrictions more likely. However, significant rainfalls can also be experienced. The towns’ existing four dams are not big enough for the unrestricted supply of water during drought, but if large rain events are captured in larger storages, there will be more than enough water for our customers well into the future.

Regarding TasWater's sewerage, the Orford and Triabunna sewage treatment lagoons are currently too small to meet expected growth. Public health and environmental outcomes will be improved through planned upgrades to the sewerage networks and treatment plants.

TasWater is working to a long-term strategy to prioritise our investment in water and sewerage services for Orford and Triabunna. This ensures money is well spent.

Our management of the area’s water system holds public health and safety as its highest priority, along with environmental management and TasWater’s legal requirements. We work with the State Government, local government, other regulators and our customers, and our approach is informed by a hydraulic model of the area’s systems, and the analysis of weather data and trends.

Orford and Triabunna’s water supplies can be vulnerable to drought, which makes water restrictions more likely. However, significant rainfalls can also be experienced. The towns’ existing four dams are not big enough for the unrestricted supply of water during drought, but if large rain events are captured in larger storages, there will be more than enough water for our customers well into the future.

Regarding TasWater's sewerage, the Orford and Triabunna sewage treatment lagoons are currently too small to meet expected growth. Public health and environmental outcomes will be improved through planned upgrades to the sewerage networks and treatment plants.

  • Work on the Lower Prosser Dam

    about 2 months ago

    If you travel on the Tasman Highway near Orford, you may have noticed some work happening at the Lower Prosser Dam.

    TasWater has recently finished investigations into the dam's condition and identified some erosion at the dam’s downstream base, which needs work to fix. There is no immediate threat to the dam, but TasWater has decided to complete the work before the upcoming winter.

    These repairs will extend the life of the Lower Prosser Dam, securing its ongoing safety and a reliable water supply for Orford and Triabunna.

    This repair work is separate to Glamorgan Spring Bay Council’s work for...

    If you travel on the Tasman Highway near Orford, you may have noticed some work happening at the Lower Prosser Dam.

    TasWater has recently finished investigations into the dam's condition and identified some erosion at the dam’s downstream base, which needs work to fix. There is no immediate threat to the dam, but TasWater has decided to complete the work before the upcoming winter.

    These repairs will extend the life of the Lower Prosser Dam, securing its ongoing safety and a reliable water supply for Orford and Triabunna.

    This repair work is separate to Glamorgan Spring Bay Council’s work for its Prosser Plains Raw Water Scheme. TasWater continues to work with Council to ensure the scheme does not impact the drinking water supply.

  • Thank you for coming to our Triabunna meeting!

    12 months ago

    It was great to meet our customers at the Triabunna Community Hall on Saturday, 23 June.

    TasWater was joined by representatives of Glamorgan Spring Bay Council and Tassal to discuss a wide range of topics for about two hours, with no stone left unturned!

    We know the stage 1 water restrictions introduced in April 2018 created some concern in the local community about TasWater's management of the water supply. We certainly acknowledge there are known issues with the Orford and Triabunna system. TasWater is dealing with these and our strategic approach provides a pathway for the area's ongoing improvement, which...

    It was great to meet our customers at the Triabunna Community Hall on Saturday, 23 June.

    TasWater was joined by representatives of Glamorgan Spring Bay Council and Tassal to discuss a wide range of topics for about two hours, with no stone left unturned!

    We know the stage 1 water restrictions introduced in April 2018 created some concern in the local community about TasWater's management of the water supply. We certainly acknowledge there are known issues with the Orford and Triabunna system. TasWater is dealing with these and our strategic approach provides a pathway for the area's ongoing improvement, which aims to provide improved water surety as Orford and Triabunna continue to grow.

    TasWater will return to the area when there is more to be said, but in the meantime we always welcome comments and questions from customers. Please register to use the site and ask your questions here.

  • Public meeting - 2pm on 23 June 2018, Triabunna Town Hall

    about 1 year ago

    You are invited to attend a public information session at 2pm on Saturday, 23 June, at the Triabunna Community Hall. Representatives of TasWater, Glamorgan Spring Bay Council and Tassal will be available to answer your questions.

    The discussion will include:

    Follow the links above to read our FAQs and click on Q&A to ask us more questions ahead of the meeting.

    You are invited to attend a public information session at 2pm on Saturday, 23 June, at the Triabunna Community Hall. Representatives of TasWater, Glamorgan Spring Bay Council and Tassal will be available to answer your questions.

    The discussion will include:

    Follow the links above to read our FAQs and click on Q&A to ask us more questions ahead of the meeting.

  • Stage 1 Water Restrictions removed for Orford and Triabunna

    about 1 year ago

    From mid-2017 until May 2018, the Prosser catchment experienced below average rainfall and above average temperatures, which meant that water was not flowing into TasWater’s Lower Prosser Dam, the primary source of drinking water for the area.

    Water restrictions were removed on Monday 14 May, following more than 90mm of rainfall in the Prosser catchment, greater than a one-in-five year storm event. Thankfully, this was enough to not only wet the catchment, but to fill both the Upper and Lower Prosser Dams.



    From mid-2017 until May 2018, the Prosser catchment experienced below average rainfall and above average temperatures, which meant that water was not flowing into TasWater’s Lower Prosser Dam, the primary source of drinking water for the area.

    Water restrictions were removed on Monday 14 May, following more than 90mm of rainfall in the Prosser catchment, greater than a one-in-five year storm event. Thankfully, this was enough to not only wet the catchment, but to fill both the Upper and Lower Prosser Dams.