Seattle-Tacoma Interurban Railroad mainline at south Seattle, Washington, circa 1927. Looking north at interurban line, overhead trolley wire, Pacific Coast Railroad mainline at left. Other Subject Classes: railroad mainline, railroad electrification.

Site of Pacific Coast Railroad mainline at Maple Valley, circa 1996.

Skiers at Martin, Washington, circa 1939. Two women on skis near Northern Pacific tracks. J.M. Fredrickson collection. Other Subject Classes: people, track, mountains

Spokane, Portland & Seattle (SP&S) Junction in Kennewick, Washington, on February 14, 1981, where the SP&S joins the Northern Pacific mainline. This track is in the 3rd subdivision of the Idaho division. Photo by GJ Werkema. Other subject classes: track

Spokane, Portland & Seattle (SP&S) Junction in Kennewick, Washington, on February 14, 1981, where the SP&S joins the Northern Pacific mainline. This track is in the 3rd subdivision of the Idaho division. Photo by GJ Werkema. Other subject classes: track

View of Hoyt Street Yard from cab of Spokane, Portland and Seattle Railway type F3 801 in 1961. Photograph by Alden Raney. Other subject classes: Locomotive-Diesel, Yard-Freight.

SP&S tracks at Clatsop Beach, Oregon undated. Photo by Kiser Photo Company.

SP&S diesel locomotive Number 322, an American Locomotive Company (ALCO) C-425, on the first trip over new track made necessary due to the construction of the John Day Dam, May 1967. Photo by J. Vincent.

SP&S East Portland yard; east side of the yard from Southeast Union Avenue, undated, from the Oregon Historical Society Collection.

SP&S Hoyt Street yard in Portland, Oregon during flooding in 1948.

Aerial view of SP&S Hoyt Street yard in Portland, Oregon during a flood, 1948.

SP&S Hoyt Street yard in Portland, Oregon during flooding in 1948.

SP&S Hoyt Street yard; aerial view facing southeast of the Hoyt Street yard, undated.

SP&S Last Spike Ceremony at Sheridan Point, March 11, 1908. Photo Art Studios photograph.

SP&S Last Spike Ceremony at Sheridan Point, March 11, 1908. Photo Art Studios photograph, from the Oregon Historical Society Collection.

SP&S mainline and siding along the Snake River, undated.

SP&S mainline and sidings with freight and work cars at Goble, Oregon, July 1968.

Early view of SP&S mainline east of Lyle, Washington. Track to the right was the former Columbia River & Northern Railway which connected with steamboats on the river, undated.

Postcard view of the business block and railroad tracks at Rainier, Oregon, undated.

A view of the SP&S mainline above Tongue Point, Oregon from the rear of a passenger train, January 13, 1952. Photo by John Labbe.

A view of an eastbound SP&S freight train east of Binghen-White Salmon, Washington, 1951. Photo by Photo-Art Commercial Studios.

A view of SP&S mainline one mile west of Lyle, Washington, undated. Photo by Kiser Photo Company.

Color postcard view of SP&S mainline and Columbia River one mile west of Lyle, Washington, postmarked May 30, 1917.

Color postcard view of SP&S mainline one mile west of Lyle, Washington, undated.

Early view of fill on SP&S mainline one mile west of Lyle, Washington along the Columbia River, undated.

A view of SP&S mainline tracks along the Snake River near Snake River Junction, Washington, undated.

Early view of the SP&S mainline near White Salmon, Washington, undated. Photo by Kiser Photo Company.

A view of SP&S mainline track in Devil's Canyon on the Snake River, undated. Photo by the Kiser Photo Company.

Color postcard aerial view of State Highway 14 and SP&S mainline along Columbia River, undated. This is a postcard image.