Traffic data for the Port of Pittsburgh comes from the U.S. Army Corps of Engineers’ Waterborne Commerce Statistics Center and its Lock Performance Monitoring System.
Data about lock traffic is a good measure of lock activity, but is not as reliable or timely as a measure of actual tonnage; it’s reported only after a delay of as much as two years. The Port of Pittsburgh has 200 miles of commercially navigable waterways in 11 southwestern Pennsylvania counties.