The Mt Owen deposit is renowned for its complexity, consisting of multiple seams of coal dipping at angles of up to 45 degrees and mined in thicknesses between 0.4-4m. Thiess is currently mining at a depth of 270m, with annual production of 7.6 million tonnes of run-of-mine coal.

Thiess managing director Michael Wright said: “Our ongoing work at this geologically complex mine is testament to the relationship between Thiess and Glencore, and the expertise within our organisation.

“Thiess’ focus on providing innovative technical solutions and operational efficiencies, including the through-seam blasting approach we developed, is key to the ongoing value that we offer at Mt Owen.”

In 1995, Thiess was contracted to build the Mt Owen Mine infrastructure, including the design and construction of the Coal Handling Preparation Plant, site office and workshop, fuel facilities, water supply roads and wash bays. On completion of construction, Thiess assumed responsibility for mining operations, which continues to this day.

CIMIC CEO Marcelino Fernandez Verdes said: “This contract enables Thiess to further build on two decades of continuous association with the Mt Owen operations, and the mine owner Glencore.

“The award recognises Thiess’ ability to provide certainty of operations, whilst seeking out innovative ways to drive efficiency.”