Operations were temporarily halted at the Portland Aluminium Smelter last week.
It's believed it was in response to shortages across the electricity market.
An Alcoa spokeswoman confirmed the temporary shut down.
"The Portland smelter was intentionally curtailed for one hour at about 5.50pm on June 2 in response to market conditions," the spokeswoman said.
"If managed appropriately Portland smelter can be safely curtailed for short amounts of time to provide capacity during peak demand periods with minimal disruption to operations."
The federal government's Climate and Energy Minister Chris Bowen was meeting with state and territory energy ministers to discuss Australia's energy crisis on Wednesday.
Institute for Energy Economics and Financial Analysis lead research analyst Johanna Bowyer said Australia was seeing astronomical energy prices due to high international coal and gas prices driven by sanctions on Russia, outages at Australian coal fired power plants and Australian coal supply issues.
"Some solutions to this situation include increasing the energy efficiency of households, accelerating the build out of renewables, storage and transmission, facilitating an orderly exit of increasingly unreliable coal generators, and protecting domestic gas users from being exposed to high international gas prices by redirecting a small proportion of exports to the domestic market," she said.
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