Nevada County Narrow Gauge Railroad Museum Museum Yard at Nevada City, California, undated. Photograph by Wade Stevenson.

New Haven Railroad interlocking tower at Old Saybrook, Connecticut, on January 28, 1977. Railroad interlocking tower at Old Saybrook Connecticut in 1977 Photo by J.M. Fredrickson. Other Subject Classes: interlocking tower

Northern Pacific freight yard at Auburn, Washington, circa 1925. Looking north in yard with coal dock, distant roundhouse facilities, standing freight cars, mainline at left. Copy of Postcard. J.M. Fredrickson collection. Other Subject Classes: railroad yard, coal dock, freight car

Northern Pacific freight yard at Auburn, Washington, on August 10, 1967. Looking north at freight trains meeting. Photo by J.M. Fredrickson. Other Subject Classes: railroad yard, freight train

Northern Pacific freight yard at Auburn, Washington, on August 10, 1967. Looking north in yard, switch tender sitting during lull. Photo by J.M. Fredrickson. Other Subject Classes: railroad yard, railroad employee

Northern Pacific freight yard at Tacoma, Washington, circa 1920. East end of yard with semaphore signals, Seattle-Tacoma Interurban trestle in distance. J.M. Fredrickson collection.. Other Subject Classes: railroad yard, signal, bridge

Northern Pacific freight yard on waterfront at Tacoma, Washington, circa 1925. Joint Facilities view of yard on filled-in former dock area, standing freight cars. Photo by James Fisher, J.M. Fredrickson collection. Other Subject Classes: railroad yard, freight car

Northern Pacific freight yard on waterfront at Tacoma, Washington, circa 1935. Yard track with freight and outfit cars, warehouses, pile driver. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: railroad yard, freight car, outfit car, warehouse, pile driver

Northern Pacific freight yard at Stacy Street in Seattle, Washington, circa 1925. The Sears building is at right, the Smith Tower at far left. Photo by J.A. Turner. Other Subject Classes: freight yard, steam locomotive

Northern Pacific freight yard at Arlington, Washington looking south E 3rd Street at north end of yard; coaling tower on left in distance; main track third from right; box car on the spur for Washington Co-op Farmers Association and Murphy Feed & Seed Company. Other subject categories: Yard-Freight, Industrial Buildings, Structure, Coal Tower