(Ross D. Franklin | The Associated Press) This May 31, 2018 file photo shows the reduced water level of Lake Mead behind Hoover Dam in Arizona. Arizona is nearing a deadline to approve a plan to ensure a key reservoir in the West doesn't become unusable as a water source for farmers, cities, tribes and developers. Other Western states are watching. The U.S. Bureau of Reclamation expects full agreement on a drought contingency plan by Thursday, Jan. 31, 2019.