SOMA Nature Walk

I chatted with the crane operator: he says this hole is going to be 80' deep, and the drill itself is 200' long. It's currently being disassembled in New York, and will be traveling here by boat, arriving some time in March.

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9 Responses:

  1. Chris says:

    So...what's going into the hole?

    • Ben says:

      The drill, as jwz calls it, a tunnel boring machine.

      I'm a bit disappointed it's not traveling from NY to SF by tunnel. Way to fail to construct the burrito tunnel, guys.

  2. CBGoodBuddy says:

    That's why they were doing slurry wall construction 3 weeks ago. The slurry-built walls are strong enough to prevent the shaft from collapsing as they dig it. Next, when the TBM arrives and the shaft is complete, they lower the pieces of the TBM into the hole and reassemble it at the bottom. And then the boring begins.

  3. MarkL says:

    If you want to see the last project your new drill completed, check out - it was used to tunnel the Second Avenue Subway.