Sam Mathiowetz demonstrates how a lock works
Sam Mathiowetz, an equipment repairman at Lock and Dam 1 in Minneapolis, demonstrates how a lock on the nation’s inland waterway system works to one of the young visitors to stop by our booth at the Minnesota State Fair’s Military Appreciation Day on August 27, 2013. Our lock model was a hit with all ages, whether it was the kid that wanted to play with the boat or the adult that’s taken his recreation craft through one of the full size facilities on the Mississippi River.

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Photo by: Patrick Moes |  VIRIN: 140827-A-LI073-018.JPG

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