Mike Baier(@Mike__Baier):If you’re inside Prufrock while it’s mining, you never really see dirt. The only dirt is on the conveyor over your head. In front of you: the stationary shell (pictured below). Behind you: a finished tunnel. There’s a watertight seal between the inside of the TBM and the outside world. Without it, tunneling under the water table wouldn’t be possible.

Mike Baier

@Mike__Baier

Removing traffic from the world one tunnel at a time. Director of Production, Electrical, and Software Engineering at The Boring Company

Joined March 2020

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Mike Baier@Mike__Baier

2026.08.19 20:27

If you’re inside Prufrock while it’s mining, you never really see dirt. The only dirt is on the conveyor over your head. In front of you: the stationary shell (pictured below). Behind you: a finished tunnel. There’s a watertight seal between the inside of the TBM and the outside world. Without it, tunneling under the water table wouldn’t be possible.