The Elmer Smoak Collection consists mainly of operating manuals for railroad locomtoives and their components. Additional materials on railroad operations, principally by the Northern Pacific Railroad Company, are included.
The Frank Dekker Collection consists of Non-Operating Property Books Numbers 2, 3, and 4 of the Oregon-Washington Railroad and Navigation Company (a Union Pacific Railroad Company subsidiary).
The George Simonson Collection includes documents on the Milwaukee Road, Burlington Northern, Nothern Pacific, SP&S, Union Pacific, Pacific Coast Railroad, Great Northern and other railroads. Railroad and model railroad magazines are also included, and books on railroad subjects.
The George Werkema Collection consists of photographic slides of Great Northern Railway Company (U.S.) subjects and photographic slides of Northern Pacific Railroad Company subjects, some taken by Mr. Werkema and some from other sources. Some of these images are cross referenced to successor companies, such as the Burlington Northern Railroad Company, or to other related railroads. Subjects include railroad equipment, railroad stations, railroad bridges and other structures, and railroad tracks taken in locations across the western United States.
The Gerald Skillman Collection is comprised of 4 unused train sheets (Dispatchers Record of Train Movement sheets) from the Spokane, Portland and Seattle Railway, Oregon Trunk Railway, and Oregon Electric Railway.
