Mud Bay Logging Company loggers pose on a log suspended over disconnected log trucks at Mud Bay Washington circa 1921. Photo from J.M. Fredrickson Collection. Other Subject Classes: log reload facility, log car.

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

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