The Harold Shannon Collection consists of over 300 photographs, primarily of Northern Pacific Railroad subjects. Most were taken in the mid-twentieth century.
The Harold Simon Collection incorporates digital copies of 9 maps of railroad changes at the Dalles Dam and 1 partial pad of Great Northern telegraph blanks.
The Hennery Gunnthere Collection includes rolled drawings from the Northern Pacific Railroad numbered 44265-D Q-961; 44264-F Q-960; 49571-B Q-1224; 49234 Q-1197 for A-3 and A-5 steam locomotives.
The Herb Chaudiere Collection is comprised of books, photographs, motion pictures, audio tapes, and periodicals covering the Northern Pacific, Great Northern, Milwaukee Road, Union Pacific and other railroads.
The Herb Grisham Collection includes railroad employee passes for the Great Northern and Northern Pacific, telegraph union membership cards, time books and rule books for the period between 1913 and 1959.
The Humane Society of Central Oregon Collection includes a sheriff's deed, a Northern Pacific Railroad deed, a Great Northern Railway bill of sale, a Great Northern Railway money order stub, a Great Northern Railway ticket stub, a Snohomish County tax statement, a St. Paul, Minneapolis and Manitoba Railway Company receipt, and an insurance policy.
The J. W. Mathews consists of 1 map of the Northern Pacific Railroad Seattle-Lake Union line, 5 Milwaukee Road maps of Tacoma, Washington stations, land, tracks and structures, and 1 mini soap bar from the Northern Pacific.
The Jack Blanchard Collection includes issues of "Extra 2200 South", a magazine on diesel locomotive news and histories, and a Milwaukee Road postcard of Snoqualmie Pass, Washington.
