Technology
The ancient Romans also had a complex system of aqueducts, which were used to transport water across long distances. The first Roman aqueduct was built in 312 BCE. The eleventh and final ancient Roman aqueduct was built in 226 CE. Put together, the Roman aqueducts extended over 450 kilometers, but less than seventy kilometers of this was above ground and supported by arches.
Frederick Eaton
In 1906, the Board of Water Commissioners created the Bureau of Los Angeles Aqueduct. They appointed William Mulholland as chief engineer, who planned and developed the Los Angeles Aqueduct. The aqueduct was completed in 1913. The Aqueduct brought plentiful water to Los Angeles, which supplied its explosive population growth. It also diverted the Owens River and its tributaries, taking water away from the Owens Valley, eventually disabling the farms and communities there.