America's deteriorating infrastructure: Locks and Dams 52 and 53 on the Ohio River

Choke Point of a Nation:  The High Cost of an Aging River Lock.  (The New York Times, 11/27/2016)

Built in 1929, Lock No. 52 sits in a quiet corner of southern Illinois that happens to be the busiest spot on America’s inland waterways, where traffic from the eastern United States meets and passes traffic from the Gulf Coast and the Mississippi River. More than 80 million tons of grain, coal, fuel and other goods — worth over $22 billion — move through here each year.