Pitt River Bridge on the Pacific Highway, ca.1926 

Unidentified river running through a mountain side forest, ca.1950 

Sixth Street Bridge over an industrial area, June, 1933 

Unidentified tumultuous river curving toward snow-capped mountains, ca.1950 

View of the Owens River and Los Angeles Aqueduct, ca.1913 

Pipeline across a river, ca. 1955 

Unidentified lumber yard, showing the beginning of a flume, ca.1930 

Unidentified river surrounded by canyon walls, ca.1950 

View of Rainbow Falls near the San Joaquin River, ca.1950 

Unidentified river scene (at dusk?), ca.1950 

One of five Iron Mountain pumping stations, showing large pipe work and scaffolding, ca.1930 

Construction of Boulder Dam, showing a river between mountains, ca.1930 

Unidentified river making its way between two cliff faces, showing sandy banks at right, ca.1950 

Proposed dam site on the Colorado River at Mojave Canyon near Needles, ca.1950 

View of the Owens River and Los Angeles Aqueduct, ca.1913 

Unidentified river winding through what appears to be a desert valley, ca.1950 

Beach groins, October 1953 

Unidentified dam, ca.1930 

Huge cement conduits and flumes which will carry a water supply to Los Angeles, Los Angeles Aqueduct construction, [s.d.] 

Orange groves in Southern California, ca.1910