A $140 million desalination plant is expected to be approved by California regulators on Thursday as the U.S. state contends with how to convert ocean water into drinking water amid the worst drought in 1,200 years.

Just five months ago, the Coastal Commission by an 11-0 vote rejected a privately owned plant that would have been 10 times the size of the proposed South Coast Water District’s Doheny Ocean Desalination Project in Orange County, just south of Los Angeles.