Northern Pacific box car 1005 on a yard track in Denver, Colorado, no date. Box car NP 1005 was built by Pullman Standard in 1945 as part of the 29000-29499 40-foot box car series. In 1954, NP 1005 was one of 10 cars that had Evans DF Loader Systems installed, given a green with white strip paint scheme, and renumbered to 1000-1009. Photo by GJ Werkema. Other subject classes: freight car, steel box car

Northern Pacific 50-foot, single plug door, refrigerator car 97836 is in a train at Denver, Colorado, on February 11, 1990. The car is part of the 97800-97899 number series. Photo by GJ Werkema. Other subject classes: freight car, refrigerator car

Northern Pacific 50-foot, single plug door, insulated refrigerator car 96158 is in a yard at Denver, Colorado, on October 18, 1982. The car is part of the 96000-96199 number series. Photo by GJ Werkema. Other subject classes: freight car, refrigerator car

Missouri Pacific Railroad dome passenger car "The Eagle" during a station stop at Pueblo, Colorado in 1959. Jim and Tim Fredrickson pose for the photobgraph. Photo by J.M. Fredrickson. Other Subject Classes: passenger car

Manitou & Pike's Peak Cog Railway steam locomotive number 3 at Pike's Peak, Colorado, circa 1950. Photo from J.M. Fredrickson Collection. Other Subject Classes: steam locomotive, passenger train.

Georgetown Loop Railroad bridge at Georgetown, Colorado, circa 1985. Train on the high bridge on the loop at Georgetown. Photo by J.M. Fredrickson. Other Subject Classes: bridge, passenger train

Four locomotives on a trestle bridge in Colorado, circa 1925. J.M. Fredrickson collection. Other Subject Classes: steam locomotives, bridge

Denver & Rio Grande Western Railroad steam locomotive 268 on display at an amusement park in Denver, Colorado, circa 1965. Jim's two sons Tim and Jim in photo. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive

Denver & Rio Grande Western Railroad diesel locomotive 5484 with a passenger train in Colorado, circa 1968. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive

Denver & Rio Grande Western Railroad depot at Grand Junction, Colorado on May 26, 1989. Photo by J.M. Fredrickson. Other Subject Classes: depot