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Operations at the Superior Refinery, located in Superior, Wisconsin in the U.S. Midwest have the ability to process light and heavy crude oil from North Dakota and Western Canada. Following a fire at the site in 2018, the refinery is being rebuilt with the same configuration and with a processing capacity of 45,000 bbls/d but as of late 2024 and early 2025, it has not yet fully resumed all units.

When the operations are fully resaured, the refinery is expected to produce a full slate of products, including asphalt, gasoline and diesel. Its associated logistics include five storage and distribution terminals.