Cook Colliery is an underground mine that operates a modern longwall mining system to extract coal from the Rangal Coal Measures. There are two substantial seams: the Castor seam at a depth of 130m to 350m below surface; and the Argo seam at a depth of approximately 12m to 20m below the Castor seam. The Castor seam was partially extracted using bord-and-pillar and longwall methods.
Cook Colliery’s expansion and infrastructure upgrade program, completed in 2016, delivered a new longwall mining system, expanded power infrastructure, an upgraded coal handling system and additional underground mobile equipment. Current production uses 150m wide longwall panels supported by three continuous miners and a roadheader, all operating in the Argo seam.
Caledon continues to evaluate production from the remaining coal resources to supplement the 19 Mt run-of-mine inventory at the end of 2016.