STEM & USACE: Linking the future of the Corps with the engineers of tomorrow
Old Hickory Lock and Dam Equipment Mechanic Supervisor Justin Gray describes to Antioch Middle School science teacher Thomas Yan the lock protocol for allowing vessels through the regulated passageway at the Old Hickory Lock and Dam in Hendersonville, TN.

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Photo by: Misty Cunningham |  VIRIN: 211026-A-TG148-292.JPG