Northern Pacific steam locomotive 975 at Seattle, Washington, circa 1890. Number 975 is a class K-1 built by Baldwin in 1882. J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 977, circa 1890. Number 977 is a class K-1 built by Baldwin in 1882. J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 979 at Brainerd, Minnesota, on June 07, 1916. Number 979 is a class L built by Baldwin in 1883. Photo by Charles R. Iles, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo

Northern Pacific 89 pulls a mixed freight across bridge 4.2 near the coal mine at Blue Canyon, Washington, near Lake Whatcom, circa 1910. Photo by Louis Butt, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, freight train, trestle bridge.

A Class W3 2-8-2 locomotive hauls Northern Pacific train number 937 past Headworks Spur in the Tacoma Water System on the Green River, Washington, in 1953. Photo by J.M. Fredrickson. Other Subject Classes: freight train, steam locomotive, river.

Northern Pacific Pile Driver 12 works on a trestle along the shore of Lake Whatcom near Bellingham, Washington, circa 1910. Note the four wheel caboose on the train. J.M. Fredrickson collection. Other Subject Classes: Pile Driver, steam locomotive, work outfit car.

The rear helper engine on an extra freight west between Easton and Martin, Washington, circa 1917. Photo by Ralph Parsons, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, freight train, snow and ice.

A class Z-3 locomotive enters the cut at Tunnel 2, east of Martin, Washington, circa 1917. J.M. Fredrickson collection. Other Subject Classes: steam locomotive, freight train.

A train crew member walks the top of a train between Easton and Martin, Washington, circa 1917. Note helper locomotive pushing behind the caboose. Photo by Ralph Parsons, J.M. Fredrickson collection. Other Subject Classes: freight train, steam locomotive, railroad crew.

Northern Pacific 4025, a class Z-3, on the Milwaukee mainline bridge over the Clark Fork River at Saint Regis, Montana, on May 28, 1952. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, truss bridge.