Switching cars at Three Rivers Marine & Rail Terminals is SW1200 1255. This May 1955 EMD product was originally Wheeling-Pittsburgh Steel Corp. 1255, then was sold to Severstal Wheeling, Inc. 1255, then RG Steel Wheeling 1255, and then Frontier Industrial Corp. before becoming Three Rivers Marine & Rail Terminals 1255. (Charleroi, Pennsylvania - September 20, 2019)