PacifiCorp said Wednesday it received approval from the Federal Trade Commission for its proposed $6.65 billion acquisition of Britain's Energy Group PLC.

PacifiCorp, parent company of Utah Power and other subsidiaries, said the FTC ended the waiting period required by federal antitrust law, removing the last hurdle to its offer.To get FTC backing, PacifiCorp agreed to sell two Arizona mines owned by a U.S. subsidiary of Energy Group.