The Illawarra’s Appin and Dendrobium mines continue to play a critical role in New South Wales’ metallurgical coal industry, underpinning domestic steelmaking while advancing environmental performance and long-term operational resilience.
Following the 2024 acquisition of South32’s Illawarra Metallurgical Coal assets by GM3 – a partnership between Golden Energy and Resources and M Resources, the operations have entered a new phase focused on safety, sustainability, and consistent production. Together, the mines form a cornerstone of the trusted Illawarra Coal Blend, supplying high-quality coking coal essential for Australian steelmakers.
Dendrobium mine, operating since 2005, remains the sole producer from the Wongawilli seam and has development consent through to 2030. A proposed extension within the existing mining lease could unlock up to 55 million tonnes of additional coal, supporting around 700 direct jobs and ensuring continuity of supply into the 2040s. Appin mine, operating since 1962, complements this output with underground and surface operations linked to Port Kembla for both domestic and international customers.
A major focus of recent investment has been safety and infrastructure. The Appin mine ventilation and access project delivers critical new shafts and facilities to support long-term underground operations, approved following extensive environmental assessment and operating under strict NSW Government conditions.
Innovation is also central to the future of these assets. In late 2025, NSW approval was granted for a ventilation air methane (VAM) abatement demonstration plant at Appin. Using regenerative thermal oxidation technology, the project is expected to reduce greenhouse gas emissions by approximately 36,000 tonnes of CO₂-e per year – equivalent to removing around 8,500 cars from the road – while maintaining coal production levels.
Together, Appin and Dendrobium demonstrate how established metallurgical coal operations can continue to deliver economic value, support skilled jobs, and adopt leading emissions-reduction technologies as the industry transitions toward a lower-emissions future
