2-8-8-2 Yellowstone EM-1

Only 72 Yellowstones were built (in five different classes).

 

Railroad Line	Class	Road Numbers	Quantity
Baltimore & Ohio	EM-1	7600-7629	30

The EM-1s were the last articulated steam locomotives built for the B&O. Actually, the B&O did not want the EM-1s. Instead they wanted diesels. However, because of restrictions imposed by the War Production Board, the EM-1s were delivered from Baldwin in 1944 (7620 - 7619) and 1945 (7620 - 7629). For this wheel arrangement, they were relatively modest in size, but very successful. Originally, they worked on the Cumberland Division, a very physically difficult stretch of the B&O, with numerous heavy coal trains, as well as fast freights. The main district served by the EM-1 was the line from Cumberland towards Grafton, WV. Later, as diesels took over this assignment, the class was shifted to the Pittsburgh Division, where they primarily handled Lake Mineral traffic, plus trains between Wheeling and Pittsburgh. The class was renumbered 650-679. They started to be scrapped in 1957, and all were off the roster by 1960.