Closing the loop at the Muswellbrook Coal Rehabilitation Project

Thiess Rehabilitation completed postmining land restoration works at the Muswellbrook Coal Mine Rehabilitation Project in 2025, completing a lifecycle of work after the Thiess Brothers were awarded the initial mining contract at the project in 1944.

The rehabilitation works included engineering, design, geotechnical control, bulk earthworks, civil works, and seeding with native species and improved pasture. By optimising the reference design and applying effective risk controls, the team reduced material movement by 20%, achieved cost savings, and met design tolerances using a quality control approach recognised by the New South Wales Resource Regulator as leading practice.

A total of 156 hectares of land was restored to a combination of pasture and native ecosystems, with the rehabilitation completed on time, to a high standard and 830 days recordable injury free.