The Imperial Dam is a dam near Yuma, Arizona (USA), built in the 1930s. It diverts Colorado River water into three different canals and holds the river water until it can be directed into a desilting plant before being released into the All-American Canal, the Gila River, and the Yuma project aqueduct. While it was being built between 1932 and 1940, the Imperial Irrigation District (IID) relied on water from two temporary canals: the Inter-California canal and the Imperial canal (Alamo river).