Alcoa chief executive Bill Oplinger told Wall Street the US aluminium specialist could take strong action to boost profits from alumina, most of which it refines in Western Australia.
South West WA's power grid reached a record 91 per cent peak renewable energy share in December - driven by 1,225 MW of new battery storage - while wholesale power prices fell 13 per cent and carbon emissions dropped 15 per cent as coal and gas generation declined.
The green light for Black Mountain Energy comes just months after Federal experts said its environmental risk assessment was "limited and disjointed" and reached "largely unsupported" conclusions.
Roy Hill is the Pilbara iron ore operation developed by Gina Rinehart's Hancock Prospecting.
In 2025, it merged with Atlas Iron under the banner Hancock Iron Ore.
Battery-electric locomotive deliveries to all the big Pilbara iron ore miners are running late as heavy long-distance loads prove a technical challenge.
