National and State Register

Denver & Rio Grande Western Railroad Engine No. 40

Rio Grande County

This 1942 railroad locomotive is the oldest surviving diesel-electric locomotive to have operated on the D&RGW system.

A black and white photo of the engine on some tracks.

Denver & Rio Grande Western Railroad Engine No. 40 (2002 photograph.)

Designed and built by the General Electric Company for rail yard switching operations, No. 40 served successfully on the D&RGW from 1942 until its retirement in 1954. The locomotive was then sold to the Great Western Sugar Company where it continued to operate well into the 1990s.