Green Bay and Western Railroad 315, an Alco C430 at the National Railroad Museum, Green Bay, Wisconsin.

(Dual Freq, CC BY 3.0 <>, via Wikimedia Commons)


Alco logo, red & white.


The ALCO Century 430 is a four-axle, 3,000 hp (2,237 kW) diesel-electric locomotive. 16 were built between July 1966 and February 1968. Cataloged as a part of ALCO's 'Century' line of locomotives, the C430 was an upgraded version of the C425 model. Since 1992, five C430s have remained in existence.


Reading Alco C430 5211, "Catawissa II," date, location, and photographer unknown.

By the time Alco was ready with the C430, the writing was already on the wall. Only 16 were built. Reading got two.

(Craig Garver, Public domain,


Original owners

Owner Quantity Numbers Notes
Green Bay and Western Railroad 1 315
New York Central Railroad 10 2050–2059
Reading Railroad 2 5211-5212
Seaboard Coast Line Railroad 3 1275–1277 ex Alco (demonstrators) 430-1 to 430-3


Green Bay & Western 315 is preserved at the National Railroad Museum in Green Bay, Wisconsin.


Rear of GBW 315.

(Dual Freq, CC BY 3.0 <>, via Wikimedia Commons)



Type and origin
Power type: Diesel-electric
Builder: ALCO
Model: Century 430
Build date: July 1966 – February 1968
Total produced: 16
Configuration: AAR B-B
Gauge: 4 ft 8+1⁄2 in (1,435 mm) standard gauge
Prime mover: Alco 251
Alternator: GTA 9
Performance figures
Power output: 3,000 hp (2,237 kW)