Bertha


bertha-resumes-digging-alaskan-way-viaduct
Year in Review: The Biggest Construction Equipment News Stories of 2016
From our partners
AD
The engineering behind the new earthquake-proof bridge near Seattle's SR99 tunnel project
Bertha pushes past halfway point of tunneling for Washington’s SR 99
Bertha's repairs push Seattle's SR99 tunnel $200 million over budget. And it could get worse
As Bertha visits the dentist, a look at how this machine digs and builds the SR99 tunnel at the same time (VIDEO)
Bertha will soon begin digging below the viaduct its path will replace
Bertha back to drilling after suspension is "conditionally lifted"
Washington governor halts Bertha tunneling after sinkhole forms
Bertha breaks through repair wall and begins tunneling soil once more (VIDEO)