The biggest ticket item on California’s November ballot, tucked between the governor’s race and local elections, is $8.9 billion in bonds to help modernize California’s sprawling waterworks. The measure, which was authored by a former state water director, would fund scores of projects, from shiny new desalination plants to upgrades of old dams and aqueducts to restoration of tainted watersheds, including San Francisco Bay. The initiative, Proposition 3, comes as a historic drought has exposed the vulnerabilities of California’s water infrastructure, and it has become apparent that hotter, drier times ahead will test the adequacy of state supplies.