Martin Litzinger, a lock and dam maintenance and equipment operator and dive supervisor, briefs a team of divers before performing an underwater inspection for the Medium Capacity Fleet at the Montgomery Locks and Dam, operated by the U.S. Army Corps of Engineers Pittsburgh District, on the Ohio River in Beaver County, Pennsylvania, Aug. 2, 2021. The medium fleet crew began work at Montgomery L/D in late July, and they will spend approximately a month to replace and repair components of the gate system and valves. (U.S. Army Corps of Engineers Pittsburgh District photo by Michel Sauret)