NRG Energy will file an application with the New York Public Service Commission to close the Huntley Tonawanda coal facility by March of 2016. Meanwhile, the future of the company's Dunkirk looks bleak as they could start laying off staff there on Jan. 1. According to NRG spokesman David Gaier , sustained low natural gas prices, low energy prices and low capacity prices are behind the plans to close the Huntley site.