Opinion: Delta tunnel project will protect California’s vital water supply

California’s history is defined by building great and innovative infrastructure projects that improve our quality of life and set our state up for continued economic prosperity. From the Golden Gate Bridge to interstates 5 and 80, these projects are symbols of how major infrastructure investments can drive incredible economic growth. Though the creation of these projects was seemingly impossible to many at their inception, they quickly became an essential part of our critical infrastructure fabric that sustains our economy and way of life.