Southern Pacific Railroad steam locomotive number 4007, circa 1930. SP 4007, a 2-8-8-2 cab-forward, moves through a freight yard with railroad crews standing nearby circa 1930. J.M. Fredrickson collection. Other Subject Classes: steam locomotive, freight yard, railroad crew.

Southern Pacific Railroad steam locomotive number 3909 at Canby, Oregon in June 1947. SP 3909, a 4-6-6-2 cab-forward leading the first section of freight train No. 667, moves past the water column at Canby in 1947. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, freight train, water column.

Southern Pacific Railroad steam locomotive number 3677 at Sparks, Nevada on July 18, 1941. SP 3677, a 2-10-2, parked at the Sparks roundhouse in 1941. Photo by Jerry R. Hanson, J.M. Fredricson collection. Other Subject Classes: steam locomotive, roundhouse, turntable.

Southern Pacific Railroad steam locomotive number 3611 at Davis, California on June 18, 1947. SP 3611, a 2-10-2, leads an extra freight train at Davis in 1947. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, freight train.

Southern Pacific Railroad steam locomotive number 3025 at Los Angeles, California on August 06, 1973. SP 3025, a 4-4-2 Atlantic-type locomotive on display in Los Angeles in 1973. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, display.

Southern Pacific Railroad steam locomotive number 2271 with passenger train No. 501 running down a city street circa 1920. J.M. Fredrickson collection. Other Subject Classes: steam locomotive, passenger train.

Southern Pacific Railroad steam locomotive number 1901 at Portland, Oregon, circa 1910. SP 1901, a 2-6-2T in switching service at Portland circa 1910. Photo by K. Leavens, J.M. Fredricson collection. Other Subject Classes: steam locomotive, switcher locomotive.

Builder photo of Construction Number 1314 showing right side of 42 inch gauge Southern Lumber and Timber Company 36 Ton Two Truck Heisler Geared Steam Locomotive Number 10 at Erie, Pennsylvania, June 1915. This locomotive was used for logging near Hillsdale, Mississippi.

South Dakota Central Steam Locomotive Number 18, Class O-2, undated.

South Dakota Central Steam Locomotive Number 16, Class E-2, undated.