Norfolk & Western ALCO C-630 Diesel Locomotive, Number 1135

Developed in 1965 in response to General Motors' SD40 model, Alco introduced the Century 630 with a 16 cylinder 251 E engine and an AC traction alternator. Ten C630's were purchased by N&W in two groups. The first group of five were delivered in 1966 and rode on standard Alco Tri-mount trucks. In 1967 the second group, which included the 1135, was delivered and rode on trucks salvaged from Fairbanks-Morse Trainmasters.

All C630's had high short hoods and long hoods; Norfolk & Western considered the long hood the front. Since these units were in the minority on a roster dominated by GM and GE units, they were expensive to maintain. After an unsuccessful attempt to sell them to the Chicago and Northwestern, they were all converted to hump yard slug masters and assigned to service in Portsmouth, Bluefield, Roanoke, and Norfolk.