Klamath River Basin is ground zero when it comes to the battle over water rights in the United States. Flowing more than 250 miles southwest across Oregon into northern California, the Klamath once supported the third largest salmon run in the nation. Yet the construction of several dams has weakened water flows as water is diverted for irrigation purposes. As drought and overuse have further shrunk available water, farmers and ranchers for more than a decade have squared off against commercial fishers and Native American tribes for the limited supplies needed to support their livelihood. The battle has been brutal on all parties and at times has bordered on violence.