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Helen H. tug serves multiple purposes for Duluth-Superior Harbor

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In this region tugboats do more than assist ships through the harbor. At the start and end of each shipping season you find the Helen H. in the Duluth-Superior Harbor breaking ice. Mike Ojard, owner of Hertiage Marine, describes the technique to breaking ice while freeing up the Arthur M. Anderson from CN dock 6 in Duluth on Friday, March 29, 2019. (Samantha Erkkila / serkkila@duluthnews.com)
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