Seattle's new mayor plans to ask "tough questions" about a plan to drill a traffic tunnel below the city's waterfront. State leaders support the project, but Mayor-elect Mike McGinn, an environmental activist, says the cost of the tunnel could easily exceed current estimates of $4.2 billion. Meanwhile, the tunnel's design team is considering changes to the project that will minimize disruption for businesses and residents. The city will start taking bids when the design is completed.

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