Col. Nicholas Melin, the U.S. Army Corps of Engineers Pittsburgh District commander, briefs Maj. Gen. Mark Quander, the Great Lakes and Ohio River Division commander, on the demolition progress at Monongahela River Locks and Dam 3 near Elizabeth, Pennsylvania, Dec. 9, 2024. The Pittsburgh District demolished the facility’s dam to open a navigation channel on the Monongahela River and will remove the lock chambers beginning in 2025. The Pittsburgh District’s area of responsibility covers 26,000 square miles, which includes 23 locks and dams on 328 miles of navigable waterways and 16 multi-purpose flood-control reservoirs. During his visit, Quander toured navigation projects on the lower Monongahela River, which highlighted advancements in infrastructure and remote operations, and recognized the efforts of Pittsburgh District employees. (U.S. Army Corps of Engineers Pittsburgh District photo by Michel Sauret)