Canal congested with water from the Colorado River after five unsuccessful attempts at channeling the river, ca.1903 

Canal congested with sediment from the Colorado River after five unsuccessful attempts at channeling the river, ca.1903 

Dry Colorado River bed below the canal, ca.1903 

Canal full with water from the Colorado River, ca.1903 

Men and horses work on the levee on the south bank of the Canal near the Colorado River, ca.1903 

Construction of the Imperial Canal head gate apron on the Colorado River, Sharps, ca.1903 

Entrance to Beltram Slough near the Colorado River, ca.1903 

Construction of the Imperial Canal head gate apron on the Colorado River, Sharps, ca.1903 

Long curving jetty formed from piles on the Colorado River, New Heading, ca.1900-1950 

The headgate on the Imperial Canal at Sharps Heading, California, ca.1910 

View looking east down on the Colorado River from Grand View Plateau, Grand Canyon, 1900-1930 

Sand bars on the Colorado River below Yuma, 1900-1950 

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

Large group of men working on a new headgate on the Colorado River, ca.1905 

Mesquite forest near the Colorado River, California, ca.1910-1920 

Wood Howe truss bridge across the Alamo River below Holtville, Imperial County, California, ca.1910 

The Colorado River entering Mojave Canyon, California, 1900-1950 

Colorado River from the foot of Bright Angel Trail, Grand Canyon, looking east, 1900-1930 

Looking east from the Bright Angel Trail near the Colorado River, Grand Canyon, ca.1900-1930 

Group of prospectors on the Colorado River in Glen Canyon up from Lee's Ferry, Grand Canyon, ca.1900