Santa Clarita, California

Iron Horse Trailhead - Santa Clara River Bridge (Los Angeles County, California)
Built in 1898 over the Colorado River; Relocated here 1928 after the Saint Francis Dam collapse washed away the previous bridge.
Parker through truss bridge over Santa Clara River on Iron Horse Trail
Open to pedestrians

LACM - San Fernando Tunnel (Los Angeles County, California)
Work started March 22, 1875, opened August 12, 1876.
Tunnel under Freemont Pass/San Fernando Pass on Union Pacific Railroad/Metrolink
Open to traffic

Old Road Santa Clara River Bridge (Los Angeles County, California)
Built 1928
Steel stringer bridge over Santa Clara River on The Old Road in Santa Clarita
Open to traffic