LOUISVILLE, Ky. (AP) — A group of landowners and a Kentucky coal industry group want a federal judge to halt plans to shut down two coal-fired units at a Tennessee Valley Authority power plant that is switching to natural gas.

The Kentucky Coal Association argued in a lawsuit filed Thursday that the TVA did not follow proper federal procedure and its own rules in deciding to close the units at the Paradise Fossil Plant in western Kentucky. The TVA announced last year that it would build a new natural gas-burning facility at the Muhlenberg County site, as well as keep a third coal-fired unit in operation.