Paul R. Tregurtha entering the Poe Lock
Steam rises from the St. Marys River as the 1014 foot-long Paul R. Tregurtha makes its way into the Poe Lock on a cold Jan. morning in 2012.

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Tags: Soo Locks
Photo by: U.S. Army Corps of Engineers |  VIRIN: 120103-A-YU979-708.JPG