Great Northern Railroad Yard at Whitefish, Montana, undated. Photograph by Wade Stevenson.

Great Northern Railroad Yard at Whitefish, Montana, undated. Photograph by Wade Stevenson.

Great Northern Railway Train Number 32 Empire Builder at Havre, Montana station in overhead view in 1969.

Great Northern Railway Yard building made from former electric locomotive, at Whitefish, Montana in 1977. Other subject classes: Yard building, Motor Car

Great Northern Railway Yard office with control tower in 1973. Other subject classes: Yard Tower

Great Northern Railway Yard scene at Havre, Montana, with Train 32, Empire Builder, stopped at station in 1969. Other subject classes: Yard

Northern Pacific passenger yard at Billings, Montana, circa 1950. Overhead view of yard tracks, supply shed, baggage carts. Photo by J.M. Fredrickson. Other Subject Classes: railroad yard, baggage cart

Northern Pacific passenger yard at Billings, Montana, circa 1950. Overhead view looking east at station yard, platforms, baggage carts, mainline, station power plant. Photo by J.M. Fredrickson. Other Subject Classes: railroad yard, track, baggage cart

Northern Pacific passenger yard at Billings, Montana, circa 1950. Overhead view looking east at station yard, platforms, maintenance building, mainline, station power plant, standing Chicago Burlington & Quincy passenger train, Northern Pacific steam switch engine, passenger cars on side track. Photo by J.M. Fredrickson. Other Subject Classes: railroad yard, station, track, passenger train, steam locomotive, passenger car

Northern Pacific passenger yard at Billings, Montana, circa 1950. Overhead view looking east at station yard, platforms, baggage carts, mainline, station power plant. Photo by J.M. Fredrickson. Other Subject Classes: railroad yard, track, baggage cart