Seven Modern Wonders of the World, 1955
The 242-miles Colorado River Aqueduct made the large scale population and economic growth of Southern California possible. Constructed between 1933 and 1941, this aqueduct was selected in 1955 as one of ASCE's original "Seven Modern Civil Engineering Wonders" because of its unprecedented cost, length, pumping rate, and lift as well as its construction under conditions of severe climate and difficult terrain. The aqueduct was named an ASCE National Historic Civil Engineering Landmark in 1994.
Learn more about the history of the Colorado River Aqueduct.