WASHINGTON, June 6 -- The U.S. Department of the Interior issued the following news release: * * * Interior Approves Bull Mountains Mining Plan Modification * The Department of the Interior today announced the approval of the mining plan modification for the Bull Mountains coal mine in Montana, a key step in advancing President Donald J. Trump's energy emergency directives and strengthening U.S. energy partnerships abroad. The action authorizes Signal Peak Energy, LLC to recover approximatel  more