The US Army Corps of Engineers’ Pittsburgh District maintains the oldest, largest and most fatigued lock and dam network in the nation’s inland marine transportation system. Many of its structures are approaching an alarming tipping point where deterioration, inefficient funding and roughly $400 million in backlogged critical maintenance are converging to push the aging system to the brink of catastrophic failure. Nowhere is this more evident than at Montgomery Locks and Dam on the Ohio River and Elizabeth Locks and Dam on the Monongahela River, where the Corps has spent millions of dollars on temporary repairs.
Check it out. There are a lot of details in there.