Preparing for the Environmental Assessment

Our future Huntly mining and Pinjarra refining activities will be assessed at the highest level - being a Public Environmental Review. This will include a 10-week public comment period which we anticipate will occur in early 2025.

The State and Commonwealth assessments will run in parallel to be led by EPA.

We are preparing an Environmental Review Document (ERD) to submit to the regulators. The ERD describes the proposed future activities, potential impacts on the environment and social surrounds, and the measures which will be used to mitigate those impacts. It has been informed by extensive studies, which include:

Flora, vegetation and fauna
Surveys to identify and record data on the location, diversity and health of species. This includes conservation significant flora and threatened species such as black cockatoos and chuditch.

Social surrounds, Aboriginal and historic heritage
Surveys to identify areas of spiritual, historical, scientific, aesthetic and social values – including recreation areas, tracks and trails.

Surface and groundwater
Baseline monitoring and studies to assess and understand water quality, quantity and movements.

Air quality and greenhouse gas emissions
Assessment of potential emissions from mining and refining operations.

Assessment process and timeline

Below is the process the EPA follows in determining the outcome of an environmental assessment and an indicative timeline for assessment of Alcoa’s proposal.

Ministerial decisions Appeals process Alcoa prepares responsesto submissions EPA's assessmentand recommendationspublished Public comment on theEnvironmental ReviewDocument Level of assessment isset by regulators Alcoa undertakes studies andprepares the EnvironmentalReview Document COMPLETE Alcoa refers Proposalto regulators COMPLETE 2024 Q1 2026 2025 Updated August 2024Subject to change