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FOX 9 Minneapolis Headlines

Hole in valve determined as cause for Superior refinery explosion

Investigators identified the source of the explosion in April at the Husky Energy oil refinery in Superior, Wisconsin.

Wednesday, the Chemical Safety and Hazard Investigation Board announced there was a hole in a valve inside the fluid catalytic cracking unit, which is crucial to producing gasoline. Erosion created the hole, which caused air to mix with hydrocarbons, adding the final piece to what investigators call a "fire triangle."… More

Missing Wisconsin teen Jayme Closs honored with Tree of Hope lighting ceremony More

36 convicted in largest international sex trafficking ring brought down by federal government More

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