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

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

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

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

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

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

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

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

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

Amalgamator at a mine on the Colorado River, California, ca.1900 

Professor William Judson painting a picture on the bank of the Colorado River during a trip with George Wharton James, ca.1910 

Pelicans at the Salton Sea, California, ca.1910 

Dry Colorado River bed below the canal, ca.1903 

On the Alamo River, two days from the Salton Sea, ca.1910 

Pelicans at the Salton Sea, California, ca.1910 

Two men pulling themselves across the Alamo River on a cable strung high above, ca.1910 

Pelicans at the Salton Sea, California, ca.1910 

Imperial Canal dredger, ca.1910 

Salton Sea pelicans, California, ca.1910 

Hotel Imperial, Imperial County, ca.1910