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.

SP&S trestle over Indian Canyon at Spokane, Washington, circa 1907.

SP&S 4-8-4 steam locomotive Number 702, Class E-1, with Train Number 2 on the Fort Wright trestle, May 2, 1941. Photo by Warren McGee.

SP&S 4-8-4 steam locomotive Number 700, Class E-1, with Train Number 4 on the Fort Wright trestle, July 21, 1950. Photo by Phillip C. Johnson.

SP&S an American Locomotive Company (ALCO) 'Century Series' diesel locomotives with a freight train on the Fort Wright trestle, undated. Photo by Robert Johnston.

SP&S diesel locomotive Number 303, an American Locomotive Company (ALCO) C-424, leads a freight train on the Fort Wright trestle, undated. Photo by Robert Johnston.

SP&S an American Locomotive Company (ALCO) 'Century Series' diesel locomotives with a freight train on the Fort Wright trestle, undated. Photo by Robert Johnston.

SP&S an American Locomotive Company (ALCO) 'Century Series' diesel locomotives with a freight train on the Fort Wright trestle, undated. Photo by Robert Johnston.