Photo View from highway Looking south at the All American Canal, Colorado River. The All-American Canal brings Colorado River water to the Imperial Valley in California. The canal is the valley's only source of water. The All-American Canal provides drinking water for 9 cities and irrigates over 500,000 acres. It is the largest irrigation canal in the world. Eight hydroelectric power plants have been constructed along drops in the All-American Canal system. Junction of Interstate Highway #8 - To Algodones, Mexico