Southern Pacific Locomotive using a plow to clear snow from tracks in Donner Pass, five miles west of Soda Springs, Calif., 1949.
Photo by John Dominis
©John Dominis—Time & Life Pictures/Getty Images 

Southern Pacific Locomotive using a plow to clear snow from tracks in Donner Pass, five miles west of Soda Springs, Calif., 1949.

Photo by John Dominis

©John Dominis—Time & Life Pictures/Getty Images