Union Pacific Railroad bridge at Spokane, Washington, undated. The photo envelope lists Havermale. Photo by Jack Flagg, J.M. Fredrickson collection. Other Subject Classes: track, bridge, station.

Union Pacific Railroad bridge at Spokane, Washington, undated. The photo envelope lists Havermale. Photo by Jack Flagg, J.M. Fredrickson collection. Other Subject Classes: track, bridge, station.

Union Pacific Railroad bridge sign at Spokane, Washington, undated. The photo envelope lists Havermale. Photo by Jack Flagg, J.M. Fredrickson collection. Other Subject Classes: track, bridge, station.

Union Pacific Bridge in Joso, Washington, undated. Near Lyons Ferry, before the Snake River dams were put in. Photograph by Wade Stevenson.

Photocopy of photograph of trestle work possibly in Washington state, undated. From the Pacific County Historical Society Collection.

Photocopy of photograph of trestle work possibly in Washington state, undated. From the Pacific County Historical Society Collection.

Track view over bridge from Great Northern Railway Great Falls passenger station (not visible) to Great Northern Railway shops Other subject classes: Bridge

Track view of Great Northern Railway Stone Arch Bridge, Minneapolis, Minnesota in 1969. Other subject classes: Bridge

SP&S trestle east of Astoria, Oregon, circa 1910. Photo by Dan Warnock

SP&S trestle east of Astoria, Oregon, circa 1910. Photo by Dan Warnock