Hoover Dam was built by the Bureau of Reclamation in order to control floods, provide water for irrigation, and produce hydroelectric power. It is not without artistic flourishes, however. Art Deco stylistic touches are evident in many details of the dam, including the two pairs of intakes towers. The dam is built in an area called the Black Canyon on the Colorado River, on the border of Arizona and Nevada. The two states are in different time zones, and the towers feature clocks showing the time in their respective states, in this case the two Nevada towers.