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Significant progress made on upgrade of Tasmania’s Lemonthyme Power Station
7 May, 2026
Entura congratulates Hydro Tasmania on reaching the official halfway mark of a $62m upgrade at Lemonthyme Power Station in Tasmania’s Mersey-Forth hydropower scheme.
It is the first full upgrade since the 54 MW station was first commissioned in 1969.
“Lemonthyme is an essential power station in the Mersey-Forth, connecting the Mersey River to the River Forth via a 6.5km tunnel and 1.6km penstock,” said Jesse Clark, Hydro Tasmania’s Executive General Manager Assets and Infrastructure. “That vital link between the two rivers makes it a critical asset in our portfolio.”
The upgrade of the station includes refurbishing the turbine relief valve and machining technical parts to reduce any defects or errors. The works aim to add 30 years to the power station’s expected life, while also increasing the station’s efficiency.
Entura specialists across many disciplines and teams have worked on a wide range of projects at Lemonthyme Power Station over many years. Most recently, our electrical engineers contributed to a full electrical upgrade of the station, including overhauling the low-voltage switchboards and cabling, and designing new station lighting and emergency lighting.
Our water engineers contributed to the early planning stages of the upgrade, helping assess the potential for water to continue passing from Lake Parangana into the Forth River system via the Lemonthyme bypass canal during the station outage.
Entura’s General Manager, Wayne Tucker, commented on the milestone, saying “Entura is always proud to support our Hydro Tasmania colleagues with the skills and capacity to achieve their asset management objectives, and to help keep Tasmania’s hydropower system delivering reliable clean energy and ongoing value for generations of Tasmanians.”
The Lemonthyme Power Station upgrade is expected to be complete by the end of 2026. The upgrade of the final power station in the Mersey-Forth scheme, Fisher Power Station, is due to start in 2027. Upgrades at Paloona, Devils Gate, Wilmot, Cethana and Rowallan power stations have already been completed.
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