Salt Lake Tribune: Plans for a third coal-fired power plant at Delta are dead. The Intermountain Power Agency said Wednesday it will let the air-quality permit for a coal-fired Unit 3 expire. Instead, the company will focus on other options for the central Utah site, said IPA spokesman John Ward. “The understanding within IPA is that if there were ever an attempt to start another third coal-fired power unit at that location, they would have to start over,” he said. “This particular permit …