Collection consists of letters and correspondence between Earl R. Abbett and former railroad employees, 1940-1953, regarding railroad activities in the first half of the 20th century. Abbett was a dentist and employee of the Spokane, Portland and Seattle Railway.

Collection consists of two black and white panoramic photographs: one by Frank Woodfield that depicts damaged buildings and blocks of rubble in Astoria, Oregon, after the fire of 1922; and one group portrait of employees of the Spokane, Portland, and Seattle Railway, taken in 1928.

Album containing black and white photographs of scenes along the main line of the Spokane, Portland, and Seattle Railway, including laying of tracks in East St. Johns in July 1952; railroad trains and tracks; railroad stations, particularly in Washington state; and interior views of railroad cars.

Album containing black and white photographs by multiple photographers, circa 1920-1969, of scenes along the main line of the Spokane, Portland, and Seattle Railway, from Portland, Oregon, to Spokane, Washington. A large number of the images were taken along the Columbia River and in the Columbia River Gorge. Also included are photographs of Mount Hood, Mount St. Helens, and Mount Adams, and aerial views of Portland and Spokane.

Collection consists of marketing and promotional photographs used by the Spokane, Portland, and Seattle Railway. It includes images of rolling stock, railroad tracks, railroad stations, agriculture, street scenes, and landscapes.

Blueprint and diazo copies of plans for projects in Oregon and Washington, including the Willamette Falls locks; modifications to a dam and lock on the Yamhill River; gun emplacements at Fort Stevens; and a Spokane, Portland and Seattle Railway station and water tower. The U.S. Army Corps of Engineers is a hybrid military-civilian organization that has played a role in developing Oregon's water infrastructure since the 1860s, and which established an office in Portland, Oregon, in 1871.