Photos of interest along California State Highway #S 24 Part of the Colorado River, Imperial Dam Irrigation system.- Located about 20 miles northeast of Yuma, Arizona, Imperial Dam is the diversion point for water flowing from the Colorado River to the All-American Canal, which serves Imperial and Coachella valleys. Imperial Dam was a first for the world of irrigation, where river water would be held and then diverted into a giant desilting plant before being released into the All-American Canal. Interstate #8 to Arizona US Highway #95