Unit train sunrise
An eastbound unit potash train rolls toward Green River, Wyoming, over the Union Pacific on March 13, 2012.

The noisier end of a Union Pacific GE AC4400CW cast a distinct shadow in the late winter sun at Green River, Wyoming, on March 19, 2009.

A unit oil train is framed through the empty window of an abandoned Sinclair gas station along old U.S. 30 through James Town near Green River, Wyoming, on the afternoon of March 12, 2012. Sunset ... (more)

An eastbound unit potash train finishes traversing a long tangent on Peru Hill west of Green River, Wyoming, on March 13, 2012. The lead two locomotives can be seen in the shadows of the rugged te... (more)

As seen from inside a long-abandoned gas station along the old Lincoln Highway (later, U.S. Highway 30) at James Town (west of Green River), Wyoming, a Union Pacific unit soda ash train ascends Pe... (more)

Two sets of Union Pacific EMD SD40-2s rest on the night of January 19, 2013 at Green River, Wyoming. These older 3,000 h.p. locomotives are used for switching the yard here, while three bigger GE ... (more)

As seen from inside a long-abandoned gas station along the old Lincoln Highway (later, U.S. Highway 30) at James Town (west of Green River), Wyoming, a Union Pacific stack train descends Peru Hill... (more)

A westbound Union Pacific freight arrives at Green River, Wyoming, for a crew change on February 8, 2007. Other power moves around near the engine facility, while two yard switchers take a brief b... (more)

The noisy end of a General Electric AC4400CW locomotive at the Union Pacific engine facility at Green River, Wyoming, on February 8, 2007.

An eastbound Union Pacific freight descends Peru Hill, west of Green River, Wyoming, during the last light of March 12, 2012.

U.S. 30 is quiet, but not the UP: Beyond the gas pumps in front of a long-abandoned gas station along the old Lincoln Highway (later, U.S. Highway 30) at James Town, west of Green River, Wyoming, ... (more)

A trainload of coal from the West Elk Mine at Arco, Colorado, passes by the iconic Castle Rock, which was clearly visible in photos of the early transcontinental railway in the 1860s. Lead engine... (more)

Out of a roster of 40, two UP GE U50C;s bring westbound tonnage into Green River for a crew change.

Traffic on the road is very quiet this morning, unlike the parallel Union Pacific main line which is humming with trains. As seen from inside a long-abandoned gas station along the old Lincoln Hig... (more)

This is the one and only time I ever saw one of these and I've seen very few shots of them but have never seen a shot of one of these on a passenger train.