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.
The Vern Salomensen Collection is a group of photograph negatives of Northern Pacific equipment, chiefly steam locomotives, and locations taken in the 1950's.
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 Robert Grove Collection consists of 6 glass plate negatives and 9 prints taken from 2 of the negatives. 4 negatives are scenes woodland scenes near Mount Rainier, 1 is of a railroad tunnel of the Northern Pacific Railroad Company, and 1 is an unidentified town with Mt. Rainier in the background.
The Richard Barger Collection consists of one box of published books, a photograph of SP&S locomotives at Wishram, Washington and a Hudson locomotive lubrication chart.