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Offshore wind could power Alcoa's Portland smelter in Australia

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By Sonali Paul

MELBOURNE, Dec 7 (Reuters) - Australia's Alinta Energy said on Tuesday it is considering building a A$4 billion ($2.8 billion) offshore wind farm to supply Alcoa Inc's Portland aluminium smelter and the country's east coast grid.

The project is at a very early stage, with Alinta studying a 500 square kilometre area offshore where it sees potential to tap a strong wind resource. It would need to complete environmental studies, technology and cost studies as well as seek government and community approvals before going ahead.

"We think the wind farm would need to be around 1,000 megawatts to be viable," Alinta's head of project development Kris Lynch said in a statement.

Australia has no offshore wind farms, despite having thousands of kilometres of coastline with strong wind resources. There are more than 10 proposed offshore projects, with a combined capacity of more than 25 gigawatts.

By comparison, as of 2020, there were 7.4 GW of onshore wind farms with 4 GW of capacity due to start construction.

The offshore industry could take off following Australia's passage last month of long-awaited legislation setting a framework for developing offshore wind farms, although regulations flowing from the law still have to be worked out.

If Alinta's Spinifex project went ahead, the Portland smelter, run by Alcoa, could be powered by up to 100% renewables, the companies said.

"This proposal offers an ability to make a step change impact to Portland Aluminium's carbon footprint," Portland Aluminium Smelter Manager Ron Jorgensen said in a statement.

The smelter, the biggest single-power user in the state of Victoria, currently depends on coal-fired power and is looking for ways to decarbonise.

The smelter received government aid and a cheap power deal earlier this year to help it stay open for another five years.

Alinta Energy is owned by private Hong Kong conglomerate Chow Tai Fook Enterprises.

($1 = 1.4180 Australian dollars) (Reporting by Sonali Paul; Editing by Devika Syamnath)

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