Facing obsolescence as ships outgrew its locks, Panama put a $5.25 billion canal expansion to a referendum in 2006 and voters approved it. The episode follows Alberto Alemán Zubieta's turning the canal into a business, the nine-year build of a third set of locks, a cost-overrun fight, and the June 2016 opening. It closes on the canal's dependence on fresh water.
The 78 percent approval came on turnout of about 43 percent. The project ran over its estimates, and whether returns met the rosiest forecasts is debated. The water-saving basins helped, but the 2023-24 drought still forced restrictions.