Mesquite tree in Imperial Valley after irrigation, ca.1910-1920 

Two men raising (or lowering) a flag in front of the Mexican Custom House, just below the first heading of the Colorado River, near Mexicali, ca.1910 

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

Small ferry boats moored along the Colorado River near Giers, California, 1906 

Looking up the Colorado River from an island near where it enters the Imperial Canal, ca.1903 

Mesquite bean plant specimen, ca.1900-1910 

Yuma Indian dwellings near the Colorado River on the Yuma Indian reservation, ca.1900 

The Colorado River in one of the Mojave canyons, California, 1900-1950 

Three men in the Mexican Custom House, just below the first heading of the Colorado River, near Mexicali, ca.1910 

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

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

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

Mesquite covered with mistletoe growing in the Colorado Desert, ca.1915 

A view of Fort Yuma and the Colorado River, ca.1898 

Dry Colorado River bed below the canal, ca.1903 

View of the distant Colorado River from Duttons Point, Grand Canyon, ca.1900-1930 

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

Colorado River near Drennen's Mill, 1900-1950 

Near the junction of the Havasu and Colorado Rivers, Grand Canyon, 1900-1930 

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