A better question is why didn't they stop when it hit 100% overrun.
$6 billion overrun could have fed, clothed and health insured million of people
$6 billion overrun could have fed, clothed and health insured million of people
Because you still need a bridge that won't collapse in an earthquake?
The Bay Bridge is the 2nd busiest bridge in the US... $6B seems like a lot until you look at how much disruption and damage a collapse would cause to the $600B GDP of the SF Bay area.