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.
Los Angeles Aqueduct
Construction began in 1908 and was divided into 11 divisions and a cement plant. The number of men who were on the payroll the first year was 2,629 and this number peaked at 6,060 in May 1909. In 1910, employment dropped to 1,150 due to financial reasons but rebounded later in the year. Between 1911 and 1912 employment ranged from 2,800 to 3,800 workers. The number of laborers working on the aqueduct at its peak was 3,900. In 1913 the City of Los Angeles completed construction of the first Los Angeles Aqueduct.