A northbound BNSF freight negotiates Wind River Canyon about half way between the sidings at Dornick and Minnesela, Wyoming, on June 20, 2017.

A southbound BNSF freight emerges from 177-foot Tunnel 4 in Wind River Canyon between Dornick and Piper, Wyoming, on the afternoon of June 20, 2017.

Beneath the impressive rock walls of Wyoming’s Wind River Canyon, a BNSF freight heads southbound between the sidings of Minnesela and Dornick on June 20, 2017.

A northbound BNSF freight emerges from 370-foot Black Tunnel south of Dornick in Wyoming’s rugged and scenic Wind River Canyon on June 20, 2017.

In scenic Wind River Canyon, a westbound BNSF freight exits Black Tunnel south of Dornick, Wyoming, on May 25, 2011. Powered by warbonnet GE C44-9W No. 4706 and Union Pacific EMD SD70M No. 4274, t... (more)

A westbound BNSF freight passes through scenic Wind River Canyon at Dornick, Wyoming, on May 25, 2011. GE C44-9W No. 4706 and UP EMD SD70M No. 4274 power the train which has five Boeing 737 fusela... (more)

Northbound Kansas City to Laurel train approaching the south switch Dornick siding deep in the Wind River Canyon

A westbound BNSF freight passes beneath the impressive, towering cliffs of Wind River Canyon at Dornick, Wyoming, on October 2, 1997. Leading the colorful consist is Burlington Northern SD40-2 No.... (more)

A westbound BNSF freight rumbles through scenic Wind River Canyon at Dornick, Wyoming, on October 2, 1997. Leading the colorful consist is Burlington Northern SD40-2 No. 8177, followed by Santa Fe... (more)

A westbound Burlington Northern Santa Fe freight is in scenic Wind River Canyon at Dornick, Wyoming, on July 8, 1999. Leading the train is warbonnet GE C44-9W No. 793, with two EMD SD40-2s trailin... (more)

Westbound in scenic Wind River Canyon, a BNSF freight is at mile 321.3 south of Dornick, Wyoming, on May 25, 2011. Powering the train is GE C44-9W No. 4706 and UP EMD SD70M No. 4274, with five Boe... (more)

Green, red and blue
A westbound BNSF freight exits Black Tunnel in scenic Wind River Canyon south of Dornick, Wyoming, on October 2, 1997. Leading the colorful consist is Burlington Nor... (more)

A westbound BNSF freight exits Black Tunnel in Wind River Canyon south of Dornick, Wyoming, on May 25, 2011. Behind the warbonnet Dash-9 and visiting UP SD70M are Boeing 737 fuselages headed for W... (more)