Chuck Quirmbach/WPR.Chuck Quirmbach/WPR.Enbridge spokeswoman Becky Haase and Superior terminal supervisor Tom Peterson. Photo: Danielle Kaeding/WPR.Containment ponds at Enbridge's Superior terminal serve to prevent spills into a nearby river. They're checked by workers at least four times a day. Photo: Danielle Kaeding/WPR.
