The David Letcher Collection consists of a photograph labeled "In the Heart of the Cascades" of the Northern Pacific right of way circa 1915, and compact discs entitled "Stack Muzik" of moving pictures of railroad equipment in the Bend, Oregon area in 1977 and 1978 principally of the Burlington Northern but including some other railroads.
The Daniel Gabbert Collection is comprised of railroad equipment operating manuals and government and railroad company regulations for the operation and maintenance of railroad equipment.
The Dan Perkins Collection integrates some 15,000 photographic slides taken by Daniel Perkins between 1966 and 1973 of Pacific Northwest railroad subjects, chiefly equipment. Railroads covered include the Great Northern, Northern Pacific, Spokane, Portland and Seattle, Southern Pacific, Milwaukee Road, Union Pacific, and Pacific Coast.
The Dale Madison collection includes employee timetables and special instructions issued between 1956 and 1973 by the Union Pacific, SP&S, Northern Pacific, Bulington Northern and other railroads, a Nothern Pacific brakeman had and a Burlington Nothern bump hat.
The Cowlitz County Historical Society Collection joins 3 photographs and the Bureau of Alcohol, Tobacco and Firearms report on the Columbia & Cowlitz Railway Bridge #7 fire in 2001.