The Stuart Holmquist collection includes photographs of Northern Pacific buildings, locomotives and other subjects, a Northern Pacific Black Hills timetable from 1879, copies of the Burlington Northern "Burlington Bulletin" employee magazine, various Great Northern, Burlington Northern and Burlington Northern Santa Fe materials, copies of the Union Pacific Historical Society "Streamliner" magazine, a book of SP&S track plans, a book covering the Union Terminal Company in Dallas, Texas. Various books on railroad topics and annual reports for Great Northern Railway for1890-1920 and1944
The Steven Neumann Collection comprises Great Northern Railway track profiles and drawings: a track profile of Mid-Canon Montana, drawings 117-5796-1-3, 116-3443-6 covering trestle ballast and stops, and a track profile from Fargo, North Dakota to Grand Forks, North Dakota miles 63-83.
The Steve Panzik Collection includes an extensive selection of Burlington Northern Railroad operating documents, chiefly from the Klamath Falls, Oregon area. See http://admin.pnrarchive.org/sites/databases/Collection%20Descriptions/w2014-34%20panzik%20train%20mtn%201-3.pdf for a detailed description. The second accrual added Southern Pacific Railroad items, additional Burlington Northern Railroad items and some documents from small regional railroads.
The Steve Hauff Collection holds primarily Milwaukee Road materials together with a book of mechanical drawings for the Northern Pacific-Union Pacific interlocking plant at Tacoma, Washington.
The Stephen McDonald Collection includes Milwaukee Road pencils and a patch, photographs of Joseph McDonald (the donor's father) and copy of a newspaper article.
The Stephen Irwin collection is 152 railroad 5" x7" photographs each printed and captioned by photographer Ron Nixon from his collection of Northern Pacific railroad photographs.
The Stan Kistler Collection consists of over 500 images of Northern Pacific Railroad Company equipment during the middle decades of the 20th century and 12 Northern Pacific public timetables from the 1930's through 1957, collected by Harold Stewart.
The Spokane, Portland, and Seattle Railway Authority for Expenditure (AFE) Collection consists of 10,058 paper files. The contents document construction and modifications to the railroad and nearby structures, and include business and finance records, engineering drawings, maps, and correspondence. Records range from 1908 to 1968 and include some from the Oregon Trunk Railroad.
Spokane, Portland and Seattle Railway Historical Society