•YEARS BUILT: 1961-1963
•MANUFACTURERS: EMD, GMD
•OPERATED ON: Most Class I railroads, notably, Chesapeake & Ohio, Burlington Route, Chicago & North Western, Denver & Rio Grande Western, Great Northern, Louisville & Nashville, Milwaukee Road, Pennsylvania, Santa Fe, Seaboard Air Line, Cotton Belt, Soo Line, Southern, Southern Pacific, Union Pacific
•NAME: GP30
•QUANTITY: 948 (906, U.S.; 2 Canadian-built; 40 B units)
•HORSEPOWER: 2,250
•KNOWN FOR: Contour on top of hood and pronounced blister covering dynamic braking resistors and part of centralized air system
•STATUS: Several still operating on short lines and tourist roads
I know some were used as road slugs on CSX