SUPERIOR - Authorities say an explosion and fire at a Superior oil refinery poses no danger to the public.
Superior Fire Chief Steve Panger says the explosion happened in an empty asphalt tank at the Calumet Oil Refinery just before 3:30 p.m. Tuesday, and the fire was contained to that tank. The fire burned residual material in the 30-foot-wide tank.
WDIO-TV reports the fire sent a plume of smoke that could be seen from nearby Duluth, Minnesota.
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