 At an estimated cost of SEK 750–800 million, the refinery was inaugurated on 29May 1975.While the plant and the storage tanks for the oil products are above ground and visible for miles around the site, the crude oil is stored in four large cisterns that can hold up to , blasted out of the granite bedrock below the plant.Sweden's biggest oil port, Brofjorden Port, is located near the mouth of the fjord on the southeast side.