Navajo Nation is taking on three states and the federal government for the right to Colorado River water
…. On March 20 … the entire Colorado River will be looming over the [Supreme Court] justices when they hear oral arguments in Arizona v. Navajo Nation. The case, which dwells at the intersection of Native treaty rights and water rights, will mark the court’s latest foray into the byzantine rules and regulations that govern limited supplies of water in one of the driest parts of the country. For the Navajo Nation, the court’s decision on its 19th-century treaty rights could have serious consequences for its future.