Belle Ayr and Beener Coal open-cast mines use some of the largest machines in the world. This programme focuses on these extreme machines, including one of the world's biggest electric shovels, the P&H 4100XPB, the world's biggest motor grader, the Cat 24-H, the world's biggest diesel-powered rope shovel, the Bucyrus-Erie 295B series II, the Komatsu D575A bulldozer and more. We also see how the mines operate, from extraction and haulage to processing, transport and reclamation.