•YEARS BUILT: 1852-1929
•MANUFACTURERS: Lima, Southern Pacific, Baldwin, Pennsylvania Railroad, others
•OPERATED ON: Chicago & Western Indiana, Baltimore & Ohio, Green Bay & Western, Boston & Maine, Southern Pacific, Canadian National, short lines
•NAMES: Mogul, Valley Mallet
•QUANTITY: 8,000; Canadian National had the most with 469
•BOILER PRESSURE: 205 psi
•KNOWN FOR: Pulling medium-size freight trains on main lines, along with being an excellent engine for short lines due to its light weight on the lighter shortline rails.
•STATUS: Several preserved, some operational