Los Angeles and San Gabriel Railroad train on the bridge at Garvanza, the first trestle across the Arroyo Seco, approaching Highland Park from South Pasadena, ca.1885 

Bridge across the Arroyo Seco at Garvanza, showing the first cable-car to cross it, ca.1895 

San Pascual Avenue Bridge over Arroyo Seco, ca.1939 

Workers laying the last rails of the San Gabriel Railroad, Highland Park, Los Angeles, 1885 

Wooden bridge crossing over the Arroyo Seco at Avenue 52 prior to installation of the storm channel, ca.1936 

View of the Arroyo Seco Park and Channel looking northeast after the construction of the Pasadena Freeway, ca.1941 

Pacific Electric Bridge across the Arroyo Seco, near the University of Southern California College of Fine Arts in Garvanza (laterHighland Park), 1907 

Colorado Street Bridge from beneath, with an older bridge still standing under it, lower in the Arroyo Seco, Pasadena, ca.1915-1920 

View of the Hermon Avenue Bridge over the Arroyo Seco, 1936 

View of Arroyo Seco Park and Channel looking northeast, prior to the construction of the Pasadena Freeway, ca.1940 

Bridges over the Arroyo Seco Parkway between Los Angeles and Pasadena, [s.d.] 

Aerial view of flood in Azusa, showing damage of San Gabriel Railroad Bridge over a river, California, 1938 

View of the Colorado Street Bridge as seen from the Arroyo Seco below, Pasadena, 1920 

Work crews building the Los Angeles and San Gabriel Valley Railroad, South Pasadena, ca.1885 

Arroyo Seco at Avenue 52 before installation of channel, ca.1938 

Arroyo Seco storm drain showing excavation in the main channel below the old Avenue 52 bridge, February 15, 1937 

Los Angeles and San Gabriel Valley Railroad Depot at Alison Street and Anderson Street, Los Angeles, 1884 

Terrace of "Our Italy", Belvora place, overlooking the Arroyo Seco, 1885 

View of the construction of a bridge across the Arroyo Seco at Avenue Forty-three in Los Angeles, ca.1938 

Panoramic view of Garvanza looking north from across the Arroyo Seco, ca.1906