A new underwater pipeline has been installed across Spring Bay, aimed at ensuring a secure and reliable long-term water supply for the communities of Orford and Triabunna. The new 885-meter pipeline, replacing a 76-year-old one, will address recent corrosion issues and according to TasWater will enhance the region’s water infrastructure.
Media release – TasWater, 12 September 2025
New Spring Bay pipeline supports water security for Orford and Triabunna
A vital link in the long-term water supply for Orford and Triabunna has been secured with the construction of a new underwater pipeline.
The new 885-metre pipeline will replace the existing 76-year-old cast iron cement lined underwater pipeline across Spring Bay, addressing recent issues with corrosion and improving the region’s water supply infrastructure.
TasWater’s Acting Head of Renewals Mark Thomasson said this project marks a significant step in improving water supply reliability for Orford and Triabunna.
“We are committed to ensuring that our communities have access to a consistent and high-quality water supply, and this upgrade will provide the long-term security and resilience needed for the future,” Thomasson said.
“The current pipeline, which transfers water between Orford and Triabunna, has faced several failures due to corrosion of the underwater anchors. These failures have made the pipeline increasingly vulnerable to damage from tides and currents, leading to breaks in the pipe joints.
“As the pipeline sits on the seabed, accessing and repairing the damage has proven difficult, often requiring professional divers and causing longer-than-usual outages.”
To resolve this, TasWater has installed a new, durable pipeline with concrete anchors placed every 10 metres along the seabed to prevent movement and secure its position.
This upgrade will provide greater protection against damage and ensure a more dependable water supply for the long term. The new pipeline will be connected to the existing water network on both shores through excavated trenches.
“Work on the new pipeline was completed, with minimal disruption to residents and local businesses. TasWater will continue to keep the community informed throughout the project,” Thomasson said.
TasWater is investing $2 billion in its network over the next five years to ensure it can continue to deliver exceptional water and sewerage services for a thriving Tasmania.
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