U.S. Army Corps

Margaret J. Krauss / 90.5 WESA

Don Zeiler stands on a wall in the middle of the Monongahela River. In work boots and a bright orange jacket, the lockmaster at Braddock Locks & Dam is dressed for dance.

“When you’re dancing with your partner you take a step, they need to know where to go: when I’m doing this, then you do that, then I’ll do this, then you do that. So that’s basically what locking is,” he explained.