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 the second half of 2024.

The State and Commonwealth assessments will run in parallel led by the 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

Following is the current indicative timeline for the assessment.

Alcoa refers proposal to EPA


EPA considers level of assessment


Alcoa finalising submission

~Q3 2024

EPA public comment period on Alcoa’s Environmental Review Document

~Q3-4 2024

Alcoa prepares responses to submissions

~Q1 2025

EPA publishes report on assessment

~Q3 2025

Appeals process

~Q3 2025

Ministerial decision

~Q1 2026

Updated May 2024
Subject to change