The company intends to shut down extraction unit, which produces gasoline on 1 May 2014, while crude unit #2 that produces jet fuel and other products by 1 June, 2014.
Through its terminals in Anchorage and Fairbanks, the firm will continue to market fuels, while supply for the terminals will come from another source.
FHRA vice president and refinery manager Mike Brose said the company has taken difficult decision after a long, thorough and deliberative process.
"Our company has spent an enormous amount of money and resources addressing soil and groundwater contamination that was caused when Williams owned the refinery and the State of Alaska owned the land underneath it," Brose added.
