Hallador Energy Co. engages in business through its subsidiary, Sunrise Coal, LLC, which produces coal in the Illinois Basin for the electric power generation industry. The company is headquartered in Terre Haute, Indiana and currently employs 615 full-time employees. The firm's segments include Coal Operations (operated by Sunrise Coal, LLC) and Electric Operations (operated by Hallador Power Company, LLC). The Coal Operations segment includes the operating mining complexes Oaktown 1 and 2 underground mines, Prosperity surface mine, Freelandville surface mine, and Carlisle wash plant. The Electric Operations segment includes the electric power generation facilities of the Merom Power Plant. The Oaktown Mining Complex is a coal mining and processing operation located in Knox and Sullivan counties, Indiana, and Crawford and Lawrence counties, Illinois. The Oaktown Mining Complex operations consist of two active underground mines, Oaktown Fuels No. 1 Mine and Oaktown Fuels No. 2 Mine, and related infrastructure. The firm holds other recoverable coal reserves in the Illinois Basin (ILB). Its subsidiaries include Sunrise Energy, LLC, Sycamore Coal, Inc., and others.