Chicago, Burlington and Quincy Railroad Steam Locomotive 5209, Class O5, undated. Photograph by Wade Stevenson.

Chicago, Burlington and Quincy Railroad Steam Locomotive 5209, Class O5, undated. Photograph by Wade Stevenson.

Chicago, Aurora & DeKalb Railroad steam locomotive number 1, with crew and stock car, circa 1900. Phot from J.M. Fredrickson Collection. Other Subject Classes: steam locomotive, stock car.

Chicago Milwaukee St. Paul and Pacific Railroad steam locomotive number 51 at Renton, Washington, circa 1947. Front left of 2-6-6-2 Mallet-type steam locomotive heading westbound freight train meeting caboose and work train cars on shared Pacific Coast/Chicago Milwaukee St. Paul and Pacific Railroad mainline east of Renton. Photo by Harold Hill. Other Subject Classes: steam locomotives, maintenance and repair cars, cabooses, railroad mainline.

Chicago Milwaukee St. Paul and Pacific Railroad passenger train at Maple Valley, Washington, circa 1939. Eastbound ski train of coaches led by Mikado-type steam locomotive en route to Milwaukee Ski Bowl/Hyak at station, train order signal in snow. Photo by Harold Hill. Other Subject Classes: passenger cars, steam locomotives, railroad stations, railroad signaling.

Chicago Milwaukee St. Paul and Pacific Railroad locomotives at Maple Valley, Washington, circa 1950. Two steam locomotives and bipolar-type electric passenger locomotive eastbound, leading express boxcar in unusual extra movement, Pacific Coast Railroad Black Diamond branch, water tank and section house upper right, gondolas full of ballast at left. Other Subject Classes: steam locomotives, electric locomotives, freight cars, railroad mainline, railroad servicing facilities.

Chicago Milwaukee and Puget Sound Railroad steam locomotive number 935 at Maple Valley, Washington, circa 1910. Right side of Ten-wheeler-type steam locomotive, crew. Other Subject Classes: steam locomotives, railroad employees.

Chicago Burlington & Quincy troop train in the yard at Billings, Montana, circa 1945. Looking down from tower at steam locomotive and passenger cars, Northern Pacific steam switch engine number 21 and more passenger equipment standing in yard near passenger station. J.M. Fredrickson Collection. Other Subject Classes: troop train, steam locomotive, railroad yard, passenger station

Chicago and Northeastern Railroad steam locomotive number 1 at Chicago, Illinois, circa 1910. Chicago & North Eastern 1, formerly Northern Pacific number 885 class C-13, 4-4-0, built by Portland, 1881. J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster shot

Chicago & North Western Railway steam locomotive 364 at St Paul, Minnesota on May 4, 1948. Photo by Ron Nixon, J.M. Fredrickson Collection. Other Subject Classes: steam locomotive