Joe Kochuga, deputy lockmaster at Allegheny River Lock 4, guides a group tour on the landside of the lock during Lock Fest, hosted by the U.S. Army Corps of Engineers Pittsburgh District in Natrona, Pennsylvania, July 9, 2022. Lock Fest is a free event which provides members of the public an opportunity to lock through navigation facilities, watch live locking demonstrations, learn valuable water-safety tips, talk to tow operators, meet Bobber the Water Safety Dog, visit educational exhibits, gain knowledge on safe river navigation and more. (U.S. Army Corps of Engineers Pittsburgh District photo by Visual Information Specialist Stacey G. Wyzykowski)