The Adam E. Cornelius, (later the Sea Barge One and the Sarah Spencer), is a former lake freighter built in Manitowoc, Wisconsin in 1959.
[1][2] She was the third vessel to be named the after one of the co-founders of the American Steamship Company, after the second Adam E. Cornelius had been sold and renamed the Consumers Power.
Her conversion to a barge included removing the vessel's original engines, and cutting a large notch in her stern.
In 1999 her notch was converted to the Bark River Articulated Tug Barge Coupling System.
The tug Jane Ann IV has large pins which mate into sockets in the Sarah Spencer's notch.