The William Pochmerski Collection includes VHS videotapes, photographs and a newpaper clipping of the move of Great Northern steam locomotive #2507 and the move of the Terry Avenue, Seattle Railway Post Office car. Additional materials include the 1963 Annual Reports for the Great Northern and Northern Pacific and Car Builders Cyclopedias for 1940 and 1961, Car and Locomotive Cyclopedias for 1970 and Locmotive Cyclopedias for 1930 and 1947.
The William R Allen Collection is comprised of timetables, 1 "Talking It Over", and employment and retirement papers as a car Inspector for the Great Northern Railway, in addition to other items that were unrecorded at the time of accession.
The William Sornsin Collection includes "The King Street Station Historic Structural Report" on the Seattle, Washington railroad station, the Washington Department of Transportaion Master Plan Summary Report on the King Street Station, notebooks, photographs and a study of past interior finishes of the King Street Station, and engineering drawings of the King Street Station. It also includes calendars for the Burlington Northern Santa Fe, shop packets of "The Great Northern Goat" published by the Great Northern Railway Historical Society and other reference sheets.
The William Voss Collection is comprised of maps and drawings of railroad right of way maps, facilities drawings, bridges and buildings. Also included are right of way maps and drawings from Authorization for Expenditure files.
The William Zidel Collection unites 81 photographs, 2 postcards on railroad subjects and 3 stock certificates from the Western Maryland, Illinois Central and Cincinnati Northern.