The Upper Colorado River on the Grand Canyon last month. About 40 million people and 5.5 million acres of cropland depend on the Colorado for drinking water and irrigation.
From left, Dan Denham of the San Diego County Water Authority; Scott Cameron of the U.S. Bureau of Reclamation; Tom Buschatzke of the Arizona Department of Water Resources; and Colby Pellegrino of the Southern Nevada Water Authority toasted the agreement at the Carlsbad Desalination Plant in California on Wednesday.