The Michael Denuty Collection consists of commercially published books relating to railroad history, including material on the Great Northern Railway,Northern Pacific, Milwaukee Road, and Spokane, Portland and Seattle Railway.
The Michael Neale Collection includes Burlington Northern Railroad documents, Milwaukee Road documents, AMTRAK posters and calendars, glass bricks salvaged from the Auburn, Washington (Northern Pacific Railroad) diesel shops, a lock from the Union Pacific Railroad, a Tacoma belt buckle and copies of "Northwest Railfan" magazine.
The Michael Scuderi Collection takes in 2 US Army Corps of Engineers documents in printed and digital formats: "Relocation of NP Railway Facilities MP70.60 to 84.24 at Eagle Gorge (Washington)" and "Overview of Historic Railroad Bridges in King County, Washington".
The Mike Sawyer Collection is comprised of published books from the 1990's on Pacific Northwest railroad subjects and timetables for the Burlington Northern, Union Pacific, and Southern Pacific from 1977 through 2008.
The Milt Clark Collection includes Montana Rail Link morning reports dated 1989-1992 and 1994, miscellaneous employee timetables and superintendent bulletin orders.
The Montana Historical Society Deposit is comprises 1 digital file of the Warren McGee photograph index of black and white photographic negatives taken by Warren McGee, chiefly of Northern Pacific Railroad subjects.