A letter from the US miner raised hope that the jarrah forest inland from Perth would escape its strip mining for bauxite, but Alcoa is keeping its options open.
The Santos-owned 220 terajoules a day Devil Creek domestic gas plant processed gas from the Reindeer field from 2012.
By 2025, production was low and intermittent.
Santos' Reindeer gas field will fill with water sooner than expected and the production loss will add to concerns about the supply of gas to WA this decade.
