Northern Pacific steam locomotive 31 at Helena, Montana, on June 06, 1955. Number 31, a class Y built by Schenectady in 1898, poses with rods down near the passenger depot. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, passenger car

Northern Pacific steam locomotive 307 at Cole, Washington, circa 1887. Number 307 (old number series) was built by Baldwin in December 1871. The crew poses with the locomotive on the Stampede Pass line on the west side of the summit. J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo

The train crew wait with Northern Pacific 307 (old number) at Cole siding just west of Borup on the Stampede line, circa 1887. J.M. Fredrickson collection. Other Subject Classes: freight train, steam locomotive, railroad crew.

Northern Pacific steam locomotive 3015 in switching service at Tacoma, Washington, circa 1918. Number 3015 is a class Z built by Baldwin in 1907 J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 3015 in switching service at Tacoma, Washington, circa 1918. Number 3015 is a class Z built by Baldwin in 1907 J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 3014 is coupled as a front-end helper, circa 1909. Number 3014 is a class Z built by Baldwin in 1907. Photo by Art Westborg, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 3014 in work train srvice at Burup, Washington, circa 1915. Number 3014 is a class Z built by Baldwin in 1907. Photo by Art Westborg, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 3010 is posed for a builder's phato at Philadelphia, Pennsylvania, in August 1907. Number 3010 is a class Z built by Baldwin in 1907 J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 3008 at the station in Weston, Washington, circa 1915. Number 3008 is a class Z built by Baldwin in 1907. Photo by GW Pilgrim, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 3008 at the shops in South Tacoma, Washington, circa 1910. Number 3008 is a class Z built by Baldwin in 1907 J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo