Disassembling Bertha: A peek inside the SR 99 tunneling machine (May-June 2017)

https://youtu.be/D6-zZCNLeP0 The inner-workings of the SR 99 (Seattle, Puget Sound) tunneling machine Bertha are now fully visible from the camera above the pit where disassembly continues. This brief time-lapse video shows what seven weeks of nearly non-stop work looks like as workers dismantle the five-story-tall tunneling machine.