Freighter, the Mesabi Miner enters the Poe Lock (Soo Locks) while the Burns Harbor and American Century wait their turn on the wall. On this day, the Poe Lock set an all-time tonnage record locking through a total of 545,520 net tons of cargo on 17 boats in just 24 hours. November 21, 2014. Credit: C. Paris, US Army Corps of Engineers
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