Train of the Tanana Valley Railroad at the station in Chatanika, Alaska, 1916. The Tanana Valley Railroad (TVRR) was a 3 ft (914 mm) narrow-gauge railroad that operated in the Tanana Valley of Alaska from 1905 to about 1917. A portion of the railroad later became part of the Alaska Railroad.
http://en.wikipedia.org/wiki/Tanana_Valley_Railroad

Train of the Tanana Valley Railroad at the station in Chatanika, Alaska, 1916. The Tanana Valley Railroad (TVRR) was a 3 ft (914 mm) narrow-gauge railroad that operated in the Tanana Valley of Alaska from 1905 to about 1917. A portion of the railroad later became part of the Alaska Railroad.

http://en.wikipedia.org/wiki/Tanana_Valley_Railroad