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

Birdseye view of Scovillis Park in Arroyo Seco, Pasadena, ca.1898 

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

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

A bridge over the Colorado River at the Needles, ca.1934 

Ruins of Manual Garfia's adobe house in Pasadena's Arroyo Seco, 1886 

Arroyo Seco woodland view in Pasadena, showing small creek and trees, ca.1887 

Panoramic view of early Pasadena looking northeast from the Arroyo Seco, 1876 

Arroyo Seco view in Pasadena from Bellvard Place, ca.1890 

Arroyo Seco Road in Pasadena, ca.1910 

Below the Falls in the Arroyo Seco, near Pasadena, ca.1900 

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

Panoramic view of Pasadena from Martin (Ward) Block, on Fair Oaks Avenue and Colorado Street, 1880 

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 Colorado River in Blythe, ca.1900-1950 

Bridge over the Colorado River, showing an industrial yard in the foreground in Yuma, Arizona, [s.d.] 

Colorado River Bridge in Yuma, Arizona, ca.1935 

Yuma, Arizona, with a bridge over the Colorado River, ca.1900 

Construction workers on the Imperial Heading below Yuma, Arizona, [s.d.] 

Dry Colorado River bed below the canal, ca.1903