Bertha – the world’s most famous tunnel boring machine – reached her final destination amongst much fanfare on Apr...
Bertha, the 57.5-ft diameter TBM building the S...
Bertha, the TBM mining the SR 99 tunnel in Seattle, was 219 ft from its end point as of March 27, according to the Washi...
Seattle Tunnel Partners has temporarily stopped mining to prepare Bertha, the SR 99 tunneling machine, for the final 1,0...
Innovative design of Seattle’s SR 99 tunnel facilities - including ventilation - required close coordination of static...
The SR 99 TBM Bertha passed a significant milestone in its journey underneath Seattle. When the machine tunneled past Pi...
Seattle Tunnel Partners crews have now mined more than 4,000 ft as they continue their push toward the SR 99 tunnel’s...
Seattle Tunnel Partners has now bored more than one-half mile of the SR 99 tunnel. As of June 13, Bertha, the SR 99 tunn...
Seattle Tunnel Partners is set to repair damage that occurred at the Port of Seattle's Terminal 46 during the Jan. 12 ba...
The Washington State Department of Transportation (WSDOT) has notified Seattle Tunnel Partners, the deign-build contract...
