Huntly-Pinjarra Environmental Assessment

Alcoa Australia has been operating in the south-west of Western Australia since 1963.

Our two bauxite mines (Huntly and Willowdale) and three alumina refineries (Kwinana, Pinjarra and Wagerup) are among the world’s best operations of their kind and add considerable value to the national, state and local economy.

Our WA operations produce nearly 50 per cent of Australia's alumina and directly employ some 4000 people.

As part of our desire to keep adding value to Western Australia and meet contemporary expectations, we are currently undertaking an extensive and transparent environmental impact assessment under State and Commonwealth environment legislation to:

  1. Transition our Huntly mine operations to new mine regions; and
  2. Increase production at the Pinjarra Refinery by 5 per cent, which requires the development of water storage ponds and associated borrow pits.

The Proposal will undergo the highest assessment level – being a Public Environmental Review. This will include a 10-week public comment period which is anticipated to occur towards the end of 2023.

Environmental performance

We recognise the privilege of operating in an area of Western Australia characterised by Jarrah Forest and maintain our longstanding commitment to not mine in national parks, old growth forest, or other areas of high conservation value.

We are committed to protecting the biodiversity of this unique ecosystem and have a proven track record in establishing and restoring a diverse, healthy and resilient eco-system in the Northern Jarrah Forest.

Our considerable and accumulated expertise will continue to inform our practices, which include:

  • Progressive rehabilitation carried out every year
  • Sustainable rehabilitation shows ongoing growth, ecosystem development and resilience to fire
  • Adaptive management is responding to the pressure of a drier climate.

We are proud of our environmental performance in Western Australia and are confident we can continue to operate sustainably and successfully.

Read more about our rehabilitation practices and processes.

A proven track record

more than
50 yrs

research and knowledge of the Jarrah forest


only native species including Jarrah and Marri trees have been returned


average botanical species return over the past 20 years

± 75%

of all areas cleared to date have been rehabilitated

in 2022

native Jarrah forest seedlings planted

in 2022

tonnes of seed spread

Learn more about our project and our commitment to modernise our approvals processes:

  • Our project
  • Project update
  • Approvals processes
  • Have your say
  • Documents, links and contacts