An overnight blaze has severely damaged a hydro power station in Tasmania, prompting concerns regarding its potential effects on the state’s electricity supply. Emergency responders arrived at the Tungatinah Power Station, located in the Central Highlands, around 9 PM on Wednesday to combat the fire. Unfortunately, the facility has sustained significant damage and is currently inoperable.
Tungatinah is responsible for approximately 5 percent of Tasmania’s power generation, ranking it as the fifth-largest hydro power station in the state. Although its capacity is 142.5 megawatts (MW), it is notably smaller than the Gordon Power Station, which has a capacity of 432 MW and is the largest among Tasmania’s 30 hydro stations.
Both Hydro Tasmania and TasNetworks, the network operator, have assured the public that the power grid remains stable. Acting CEO of TasNetworks, Renee Anderson, stated that the transmission network is engineered to endure such incidents. While around 300 local customers have experienced power disruptions, major industrial operations in the state have not been impacted.
Due to the recent closure of the Liberty Bell Bay manganese smelter and reduced operations at the Nyrstar zinc smelter, the demand for electricity in Tasmania is currently low. Additionally, the Basslink cable, which can import 250 MW of energy, remains available to help manage demand.
Hydro Tasmania is actively reviewing its contingency measures, which include utilizing the Tamar Valley Power Station’s gas generator. This generator, with a capacity of 342 MW, is anticipated to be operational by the end of the week. CEO Rachel Watson expressed confidence in the state’s generation capacity, noting that sufficient resources are already available.
Data from the openNEM website indicates that the Tamar Valley Power Station contributed roughly 7.5 percent of the state’s power during July and August. Premier Jeremy Rockliff informed parliament that Tasmania’s dam levels are currently at their highest in a decade. Energy analyst Marc White mentioned that dam levels are around 50 percent, which is 15 percent above the prudent storage level for this time of year. He remarked that the timing of this incident is relatively fortunate, given the low energy demand and robust wind resources.
The Tungatinah Power Station is integrated into a larger hydroelectric scheme in the Derwent region, which includes ten major stations and one minor station. Water from Tasmania’s highlands passes through several of these stations, generating electricity multiple times. Water flows from the Lake Echo Power Station through the Nive River into Tungatinah, where it then merges with outflows from the Tarraleah Power Station before proceeding to Lake Liapootah.
Experts believe that the fire is unlikely to have damaged the valves that allow water to be diverted around Tungatinah, which would help maintain the operation of the broader Derwent system.
Although it is premature for Hydro Tasmania to estimate the cost of rebuilding, it is expected to be in the hundreds of millions of dollars. Rachel Watson confirmed that the power station is fully insured, which may alleviate the financial burden on the company. However, the timeline for reconstruction remains uncertain, with Premier Rockliff suggesting it could take “at least a year, certainly many months.”
The impact of this incident on Hydro Tasmania could be significant, despite the insurance coverage. Reduced power generation translates to lower sales revenue. White estimates that Tungatinah generated approximately $33 million worth of electricity in the past year. Moreover, Hydro Tasmania may need to purchase additional energy from the mainland through the Basslink cable.
Saul Eslake, an independent economist and former board member of Hydro Tasmania, indicated that the company would likely see a decline in revenue, leading to lower profits and consequently reduced contributions to the state budget. Hydro Tasmania is a major government enterprise, typically providing dividends of over $100 million to the state government. Any further decrease in dividends could pose challenges for Treasurer Eric Abetz, who relies on these funds for budget balance.
Eslake emphasized the continuing importance of the Tungatinah Power Station and its potential output, especially as demand for electricity rises from sectors such as data centers, which may be more willing to pay commercial rates than traditional industrial users.
