Northern Pacific semaphore display at the Northwest Railway Museum in Snoqualmie, Washington, on July 20, 2005. Photo by GJ Werkema. Other subject classes: Signal, Semaphore.

Northern Pacific section house at Martin, Washington, circa 1948. Frame two-story structure, caboose in distance, in snow. Photo by Lee Nordquist, J.M. Fredrickson collection.. Other Subject Classes: section house, caboose, mountains

Northern Pacific section house at Frances, Washington, circa 1915. Frame two-story house and outbuildings beside track. Copy of postcard. J.M. Fredrickson collection. Other Subject Classes: section house

Northern Pacific section house at Canyon Spur, Washington Territory, 1887. Frame living quarters with section workers, families, men on handcar, newly-laid mainline. Photo by I.G. Davidson, J.M. Fredrickson collection.. Other Subject Classes: section house, railroad employees, people, handcar, track

Northern Pacific section house and workers at Easton, Washington Territory, in 1887. New frame living quarters, section workers gathered in front. Photo by I.G. Davidson, J.M. Fredrickson collection.. Other Subject Classes: section house, railroad employee

Northern Pacific scale house at Seattle, Washington, circa 1948. Small frame railroad building at Dravis Street/Interbay, signal, employees. Photo by J.M. Fredrickson . Other Subject Classes: scale house, signal, railroad employee

Northern Pacific roundhouse at Tacoma, Washington, circa 1938. With turntable, standpipe. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: roundhouse, turntable, water column

Northern Pacific roundhouse at Tacoma, Washington, circa 1940. Roundhouse complex with water tanks, cinder pit. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: roundhouse, water tank, cinder pit

Northern Pacific roundhouse at Tacoma, Washington, circa 1938. With turntable, blow-down towers. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: roundhouse, turntable, water column

Northern Pacific roundhouse at Seattle, Washington, circa 1960. Photo by J.M. Fredrickson . Other Subject Classes: roundhouse