•YEARS BUILT: 1911 to 1948
•MANUFACTURERS: Alco, Baltimore & Ohio, Lima, Canadian, Montreal
•OPERATED ON: Numerous large railroads requiring power for fast freight and passenger trains
•NAMES: Mountain, Mohawk (New York Central)
•QUANTITY: 2,201; New York Central had the most with 600
•BOILER PRESSURE: 200 psi
•KNOWN FOR: High speed, dual service engine
•STATUS: A few have been preserved, but only one remains operational, Canadian National No. 6060.

