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

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

Colorado River near Drennen's Mill, 1900-1950 

Small outboard flat boat at Bill Williams Fork in the Colorado River, ca.1900 

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

Dry Colorado River bed below the canal, ca.1903 

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

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

A small ferry boat moored along the Colorado River in one of the Mojave canyons, California, 1900-1950 

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

Drennen's Mill on the Colorado River, 1900-1950 

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

View of the distant Colorado River from Panorama Point, Grand Canyon, 1900-1930 

Flat boat moored in Needles Canyon, on the Colorado River, 1900-1950 

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 

Colorado River at Bass Ferry, Grand Canyon, ca.1900-1930 

Colorado River, from the Hance Trail, Grand Canyon, looking east, 1900-1930 

At the foot of Bright Angel Trail on the Colorado River, Grand Canyon, ca.1900-1940 

The unsuccessful Coffer Dam under construction at the Lower Intake of the Colorado River, ca.1903