Alaska Railroad diesel locomotive 1502 on display at Yakima, Washington, circa 1978. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive

Alaska Railroad diesel locomotive 3017 at Hinkle, Oregon on October 9, 1986. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive

Alaska Railroad diesel locomotive 3017 at Hinkle, Oregon on October 9, 1986. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive

Alaska Railroad steam locomotive 301, circa 1945. Alaska RR 301 takes water, circa 1945. Number 301 is formerly Northern Pacific number 1042 class L-9, 0-6-0, built by Alco-Manchester, 1906 was sold by the Northern Pacific in 1942. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, roster shot

Alaska Railroad steam locomotive 301, circa 1945. Alaska RR 301 takes water, circa 1945. Number 301 is formerly Northern Pacific number 1042 class L-9, 0-6-0, built by Alco-Manchester, 1906 was sold by the Northern Pacific in 1942. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, roster shot

A builder's photo of Alaska Railroad steam locomotive 901 at Philadelphia, Pennsylvania in September 1976. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive

Alberta Prairie Railway steam locomotive 41 on display at Big Valley, Alberta on July 19, 1990. Alberta Prairie 41, a 2-8-0 class steam locomotive, was built by Baldwin Locomotive Works. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive

Alberta Prairie Railway steam locomotive 41 on display at Big Valley, Alberta on July 19, 1990. Alberta Prairie 41, a 2-8-0 class steam locomotive, was built by Baldwin Locomotive Works. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive

Almanor Railroad steam locomotive number 104, a three-truck Heisler, in storage at Tacoma, Washington, circa 1950. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, geared locomotive.

Almanor Railroad steam locomotive number 104, a three-truck Heisler, in storage at Tacoma, Washington, circa 1950. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, geared locomotive