Aerial Lift Bridge: Vessel enters the harbor, Duluth, Minnesota

The post card caption says These giant ore and grain carriers measure as long as 729 feet and have a pay load of up to 26,000 tons. They make the round trip from Duluth to Lake Erie ports and back in 4 to 5 days. There are over 300 ore and grain carriers operated by some 25 companies.

~ Photo Credit: University of Minnesota Duluth, Kathryn A. Martin Library, Northeast Minnesota Historical Collections

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