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

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

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

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

Bill Williams Fork of the Colorado River, 1900-1950 

Dry Colorado River bed below the canal, ca.1903 

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

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

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

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

Hance Trail on the Colorado River, Grand Canyon, looking west, 1900-1930 

View of the Colorado River looking west from Bass Mystic Spring Trail, Grand Canyon, 1900-1930 

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

Bass Ferry crossing the Colorado River from the north side, Mystic Springs Trail, Grand Canyon, ca.1900-1930 

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

Colorado River near Drennen's Mill, 1900-1950 

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

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

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

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