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  • Desperately seeking soil: As we expected, Bertha is off to a slow (but good) start

    After slogging through 15 feet of concrete, Bertha gets a taste of the good stuff – but why did it take so long?

    Engineers depend on math. It is the thing that, more than any building material, gives shape to their designs. Want proof that what you’re building matches the design? Check the plans, do the math.

    But when it comes to tracking the progress of Bertha, the SR 99 tunneling machine, you can’t rely on an equation. Yes, we told you that Bertha would average 6 … more

  • Bon voyage party for Bertha draws 5,000 people to SR 99 tunnel site

    Start with some sun, soil and celebration. Then add Bertha, the massive machine that will dig the SR 99 tunnel beneath downtown Seattle, and 5,000 of her closest friends. The result is a party big enough for the biggest tunnel-builder the world has ever seen.

    Thousands of people descended on the SR 99 tunnel launch pit on Saturday for a chance to see Bertha up-close before she starts tunneling later this month. Guests talked to project staff, learned about the project and walked around … more

  • New overpass set to open by the end of the year

    At the start of the year, it wasn’t much more than a few dozen steel beams and some columns sticking out of the ground. As the calendar turns to July 2013, the new South Atlantic Street overpass is taking shape at the southern edge of the State Route 99 tunnel construction site near the stadiums.

    The overpass will address a bottleneck near the entrance to the Port of Seattle’s Terminal 46, where trains crossing South Atlantic Street frequently block traffic. When it … more

  • Bertha arrived in Seattle on April 2

    Sixty years ago this week, Seattleites welcomed the State Route 99 Alaskan Way Viaduct to the city’s downtown waterfront. On Tuesday, April 2, the waterfront again welcomed a hulking guest: Bertha, the five-story-tall tunneling machine that will clear the way to the viaduct’s removal in 2016.

    The ship carrying the machine that will dig the SR 99 tunnel beneath downtown Seattle entered Elliott Bay on Tuesday, April 2, after a two-week journey from the manufacturing plant in … more