Burlington Northern Railroad freight train at Renton, Washington, on February 28, 1987. Eastbound train of freight cars led by diesel locomotive number 1812 on former Pacific Coast Railroad mainline down Houser Way. Photo by Robert W. Johnston. Other Subject Classes: freight cars, cabooses, railroad mainline.

Burlington Northern Railroad freight train at Renton, Washington, on February 28, 1987. Eastbound train of freight cars, caboose on former Pacific Coast Railroad mainline down Houser Way. Photo by Robert W. Johnston. Other Subject Classes: freight cars, cabooses, railroad mainline.

Union Pacific McCormick Terminal on Upper Harbor, Portland Oregon; ships in the upper harbor, Willamette River, undated. Photo by A. Prentiss.

Unknown steam powered train with pusher, at an unknown location. A David Emerson photo, undated.

Unidentified 4-4-0 steam locomotive number 67 with "Eastern" marking on the tender at a depot platform, circa 1890. Photo from J.M. Fredrickson Collection. Other Subject Classes: steam locomotive, passenger train.

Unknown steam locomotive number 14 a 2-8-0 steam locomotive, on static display at Custer, South Dakota on September 1, 1972. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, display.

Unknown Shay steam locomotive, circa 1946. Photo from J.M. Fredrickson Collection. Other Subject Classes: steam locomotive

Unknown "Old Street Car," is stopped as passengers and crew pose for a photo, circa 1925. The street car is traveling up a cut made in a hill to help the transition from the valley floor. J.M. Fredrickson collection. Other Subject Classes: streetcar

Unknown horse logging operation. Two teams of horses pulling log carts, circa 1895, location unknown. Photo from J.M. Fredrickson Collection. Other Subject Classes: horses, logging.

Unknown Climax steam locomotive with log train, circa 1930. Photo from J.M. Fredrickson Collection. Other Subject Classes: steam locomotive, logging locomotive, railroad crew.

United States Navy 0-4-0T steam locomotive number 6992 parked at Pasco, Washington, on September 24, 1948. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, switching locomotive.

United States Navy General Electric (GE) 45-ton diesel locomotive number 21 (also known as 65-00421, construction number 13135, built in July 1941) parked at a scrap yard in Tacoma, Washington, circa 1985. Photo by Al Harris, J.M. Fredrickson Collection. Other Subject Classes: diesel locomotive, switching locomotive.

United States Department of Commerce passenger car 7, circa 1950. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: passenger car

United States Army (USA) caboose on the Spokane International Railroad, undated. Other Subject Classes: Caboose

United States Army (USA) caboose on the Spokane International Railroad, undated. Other Subject Classes: Caboose

Builder photo of Construction Number 1377 showing right side of United States Army Signal Corps 47 Ton, Two Truck Heisler Geared Steam Locomotive Number 2 at Erie, Pennsylvania, June 1918. This locomotive was provided to the Airplane Spruce & Lumber Company for the logging of spruce logs to provide lumber for military aircraft and was used at Hoquiam, Washington. Photograph by Schauble.

Builder photo of Construction Number 1373 showing right side of United States Army Signal Corps 36 Ton, Two Truck Heisler Geared Steam Locomotive Number 1 at Erie, Pennsylvania, May 1918. This locomotive was provided to the Warren Spruce Company for the logging of spruce logs to provide lumber for military aircraft and was used at Yaquina, Oregon. Photograph by Schauble.

United States Army kitchen car number USAX at Fargo, North Dakota on July 12, 1964. Boy Scouts on a Great Northern tour pose for a photograph and instructions on a passenger platform in Fargo, North Dakota in 1964 with a passenger train as the backdrop. The car in the center is a US Army (USAX) kitchen car. The car to the right is a Great Northern Railway baggage car. Photo by J.M. Fredrickson. Other Subject Classes: kitchen car, baggage car.

United States Army Alco RSD-1 diesel locomotive number 8015 (construction number 70636, built in 1942) parked at the Northern Pacific's engine facility at Auburn, Washington, in 1948. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive.

United States Army General Electric (GE) 80-ton diesel locomotive number 7373 hauls a cut of cars at MoBase, Washington, at Fort Lewis in 1980. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, switching locomotive.

United States Army General Electric (GE) 45-ton diesel locomotive number 7356 on a flat car at Union Pacific's Van Asselt Yard near Georgetown at Seattle, Washington, in 1974. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive , switcher locomotive.

United States Army General Electric (GE) 45-ton diesel locomotive number 7356 on a flat car at Union Pacific's Van Asselt Yard near Georgetown in Seattle, Washington, in 1974. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, switching locomotive.

United States Army General Electric (GE) 45-ton diesel locomotive number 7356 on a flat car at Union Pacific's Van Asselt Yard near Georgetown at Seattle, Washington, in 1974. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, switching locomotive.

United States Army General Electric (GE) 80-ton diesel locomotive number 7201 (construction number 15626, built in 1942) parked at Shelton, Washington, circa 1975. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, switching locomotive.

United States Army (?) express boxcar 2996 at Bellingham, Washington at F Street crossing; no reporting marks; trucks are unusual. Other subject categories: Car-Freight, Car-Express Box, Freight

Builder photo of Construction Number 1214 showing right side of 36 inch gauge United Engineering and Construction Company 26 Ton Two Truck Heisler Geared Steam Locomotive Number 14 at Erie, Pennsylvania, February 1911. This locomotive was used in work on the barge canal at Lockport, New York. Photograph by Schauble.

Builders photo showing right side of United Electric Coal Companies 42 Ton, Two Truck Heisler Geared Steam Locomotive Number 25 at Erie, Pennsylvania, 1929. This locomotive was used for mining coal near Pyatts, Illinois. Photograph by Schauble.

Builders photo showing right side of United Electric Coal Companies 42 Ton, Two Truck Heisler Geared Steam Locomotive Number 24 at Erie, Pennsylvania, 1929. This locomotive was used for mining coal near Pyatts, Illinois. Photograph by Schauble.

Builders photo of Construction Number 1585 showing right side of United Electric Coal Companies 42 Ton, Two Truck Heisler Geared Steam Locomotive Number 23 at Erie, Pennsylvania, August 1929. This locomotive was used for mining coal near Pyatts, Illinois. Photograph by Schauble.

Builders photo showing right side of United Electric Coal Companies 42 Ton, Two Truck Heisler Geared Steam Locomotive Number 22 at Erie, Pennsylvania, 1929. This locomotive was used for mining coal near Pyatts, Illinois. Photograph by Schauble.