HOOVER DAM, Nev. - Water officials from California, Arizona and Nevada joined the federal government Monday in enacting a 50-year plan to protect the lower Colorado River and ensure states are able to get enough water and power from it. The $626 million agreement will benefit "the many important species, including humans, that rely on the Colorado River," said John Keys, commissioner of the Bureau of Reclamation, during a ceremony at the base of the massive Hoover Dam. The program, called the Lower Colorado River Multi-Species Conservation Program, aims to protect threatened and endangered species along 400 miles of river...