Cold blast over Great Lakes has icebreaker ships busy
Mike Simonson, Wisconsin Public Radio
A prolonged Arctic blast over the Great Lakes has icebreakers trying to keep ships moving through unusually thick ice.
You don't need to close your eyes to imagine what it's like on one of Mike Ojard's 2,500-horsepower, 100-foot long ice breaking tugs in the Duluth-Superior harbor. The ice is already six to 18 inches thick.
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