The Maple Valley Historical Society Deposit includes of 85 digital photographs of Pacific Coast Railroad equipment and locations taken by Tom Kroutz between 1949 and 1952 and provided to Pacific Northwest Railroad Archive on a computer disc. A separate deposit was made of 82 digital photographs of Pacific Coast Railroad and other railroad subjects taken between 1909 and 1991 in and around Maple Valley by various photographers.
The Mac McColloch collection includes 1 spiral-bound photo album of locations on the Norhtern Pacific Railroad Company's Palouse & Lewiston and Central Washington branches operated by Watco, dated March 9-10, 2004; 1 spiral-bound photo album of Palouse WA; the Northern Pacific's Washington, Idaho, Montana line; and the abandoned Genesee branch; and 22 books on railroad operations, operation of railroad equipment and safety related materials.
The Lowell Messman Collection includes documents, booklets and pamphlets, and artifacts, chiefly from the Great Northern and Burlington Northern, dating between 1946 and 1994.
The Loren Halseth Collection includes a painting of the the Tacoma, Washington Union Station on wood by Jess Cauthorn, timetables for the Burlington Northern, Great Northern, Northern Pacific, Pacific Coast and SP&S from the 1960's and 1970's, other operating and equipment documents and various small artifacts.
