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After sharing about the works underway to upgrade FGM’s underground ventilation system in our Summer 2025/2026 edition (pg. 16-17), a key milestone has been achieved with the successful commissioning of the underground primary ventilation fans. 

From planning to commissioning

The upgrade significantly changes how air moves through the mine. Rather than relying on large surface fans in the south, the system has transitioned to powerful underground fans supported by new infrastructure, including an additional Return Air Rise (RAR).

In late May, the new underground primary fans were switched on, marking the culmination of years of planning, precise engineering and construction.

The decommissioning of the surface fans and the installation of new fans underground was a project FGM presented to both the community and the EPA back in 2022 as an option to reduce the potential for low?frequency noise from our site.

Technical studies began in 2023, approvals were received in 2024.

Key benefits

Ventilation plays a critical role in underground mining. It ensures we can maintain an optimal environment for our people, delivering fresh air, managing heat, removing vehicle emissions, blast?generated gases and dust.

The new system will:

• Enhance air quality in underground working areas
• Expand airflow capacity, particularly in the lower Phoenix area
• Support continued mining at depth
• Update infrastructure for the long term

Airflow to key areas has already increased, with the system delivering stronger, more efficient ventilation where it is needed most.

A team effort

Delivering a project of this scale required collaboration across multiple teams. Mining Projects, Mining Fixed Plant, Environment & Community, Commercial, Mine Technical Services, and Mining Operations all played critical roles.

“A huge shout out to all the teams involved in the project’s safe and successful completion. This upgrade not only improves our underground working environment but also delivers on our commitments to our community and regulators,” said Luke Krois, FGM General Manager.

Mining Manager, Darren Watkins added: “This is a significant achievement for Fosterville and a critical step in supporting our life?of?mine production targets. All teams involved should be very proud.”

What’s next?

While this milestone marks the successful commissioning of the underground fans, work on the broader ventilation system continues in order to facilitate safe, responsible and sustainable operations into the future.

This includes the removal of the decommissioned surface fans and completion of the additional return air shaft. Upgrades are also planned for the northern areas of the operation.