Hallador Energy Company focuses on extracting steam coal from its operations within Indiana, primarily supplying this fuel to the electric power generation sector. The company's mining assets include the subterranean Oaktown Mine 1 and Oaktown Mine 2, both situated in Oaktown, Indiana, alongside the Ace in the Hole mine, located near Clay City, Indiana. In addition to its coal activities, Hallador Energy also conducts natural gas exploration throughout Indiana.