The federal government on Tuesday laid out two options for preventing the Colorado River’s depleted reservoirs from falling to critically low levels, saying water cuts could be imposed across the Southwest by following the water-rights priority system or by using an across-the-board percentage. That would mean smaller cuts or no cuts for agencies and entities that hold older senior rights, including agricultural suppliers such as California’s Imperial Irrigation District, which uses the single largest share of Colorado River water to supply about 500,000 acres of farmland in the Imperial Valley. That water, Beaudreau said, will be enough to boost Lake Mead’s level by two feet