Muswellbrook Coal Company plans to develop a new mine at Castle Rock, about 3km north-east of Muswellbrook in New South Wales, Australia.

Muswellbrook’s existing mine is expected to close in the next five years; however, the company intends to make headfway on the new open cut operation.

Discover B2B Marketing That Performs

Combine business intelligence and editorial excellence to reach engaged professionals across 36 leading media platforms.

Find out more

Development plans are continuing despite the disorder currently affecting the Hunter Valley coal industry.

"The new open cut Castle Rock mine will create more than 500 construction jobs." 

Muswellbrook will apply to the Mining and Petroleum Gateway Panel for a grant to meet the $2bn capital cost for the proposed project.

The new open cut Castle Rock mine will create more than 500 construction jobs, reports ABC News.

It is estimated that the mine can produce 15 million tonnes of thermal coal a year for approximately 30 years.

GlobalData Strategic Intelligence

US Tariffs are shifting - will you react or anticipate?

Don’t let policy changes catch you off guard. Stay proactive with real-time data and expert analysis.

By GlobalData

ABC News has said the company is expecting to begin construction on Castle Rock open cut mine in 2019.

Muswellbrook Coal Company is wholly owned by Idemitsu Australia Resources.

Mining Technology Excellence Awards - Nominations Closed

Nominations are now closed for the Mining Technology Excellence Awards. A big thanks to all the organisations that entered – your response has been outstanding, showcasing exceptional innovation, leadership, and impact

Excellence in Action
Dual-award winner in the 2025 Mining Technology Excellence Awards, Propeller is redefining geospatial intelligence and safety in mining. Explore how its AeroPoints and DirtMate solutions deliver survey-grade mapping, live haul metrics, and safer, more efficient operations across mines and quarries worldwide.

Discover the Impact