Traffic through the New Cumberland Locks and Dam -- the first of the newer generation of dams below Pittsburgh -- has come to halt after problems were found in the main lock chamber. The smaller lock was taken out of service a couple of years ago, so nothing is moving through New Cumberland right now.
Here is a story from a Pittsburgh newspaper, and here is one from Steubenville, Ohio.
As of this writing, eight towboats are in queue waiting to transit New Cumberland. It looks like Marathon Petroleum has two boats stuck above the locks waiting to come home.
The Pittsburgh District of the U.S. Army Corps of Engineers released this statement on Tuesday, December 13: