The Waldo Thomas Collection includes materials on a wide range of railroad subjects, primarily created between 1950 and 2000, with some items as early as 1902. Documents include posters, post cards, tickets, engineering drawings, and maps. Materials produced by the Northern Pacific Railroad Company, Great Northern Railway Company (U.S.), Southern Pacific Railroad Company and other railroads are included.
The Walt Grecula Collection is comprised of railroad photographs, maps, documents and ephemera. It covers chiefly the Chicago, Burlington and Quincy Railroad, with additional materials from the successor Burlington Northern. It also has some documents and photographs from the Milwaukee Road and Northern Pacific. The period covered ranges from the 1920's to the 1980's.
The Walter Appel Collection includes "Modern Railroads" for July, 1964, Northern Pacific Railroad Annual Reports for 1960-1968, Northern Pacific Railroad Statistical Supplements to the annual reports for 1962 and 1964, and Standard & Poor's report page for Northern Pacific earnings dated 04/28/1967.
The Walter Mills Collection comprises the book "The Report of Explorations and Surveys to ascertain the Most Practical and Economical Route for a Rrailroad from the Mississippi River to the Pacific Ocean".
The William M. Woody Collection comprises 7 digital photographs, principally of William M. Woody in or adjacent to steam locomotives he operated as a fireman and engineer for the Oregon-Washington Railroad and Navigation Company between 1942 and 1959.