TECO Energy, parent company of Tampa Electric, plans to seek regulatory approval to convert the 1,700-MW coal-fired Big Bend power plant to natural gas. If approved, the $1 billion conversion would take up to a decade to complete, the Tampa Tribune reported. The company has already been conducting studies and engineering analysis on the site for a potential conversion for several years, said TECO executive Rob Bennett. "It's a big decision," Bennett said. "It has to work.