WASHINGTON, Aug. 8 -- The U.S. Department of the Interior issued the following news release: * * * Interior Approves Mining Plan to Unlock 14.5 Million Tons of Coal at Antelope Mine * WASHINGTON -- The Department of the Interior today announced approval of a mining plan modification that will unlock 14.5 million tons of federally owned coal at the Antelope Mine in Converse County, Wyoming. The Office of Surface Mining Reclamation and Enforcement issued the decision following completion of a   more