Mammoet Tunnel Boor Machine Bertha

Mammoet Tunnel boor machine "Bertha"

Bertha- Raising tunnel boring machine Bertha from below

Big Bertha -- world's largest tunnel boring machine -- facing big Seattle challenge

CBS Evening News

Mammoet - Recovery of a stuck tunnel bore in Seattle

Marine Salvage and Offshore

TBM Bertha cutterhead and drive unit lift

Mammoet Lift TBM To The Surface.

SC&RA Job of the Year Award video - 'Raising TBM Bertha'

Details of TBM Bertha's recovery lift and repair program

Lecture on Underground Metro Tunnel Construction in Urban Cities

IAStructE Webinar

Tunnel Boring Machine for Children | Truck Tunes for Kids | Twenty Trucks Channel | Big Bertha

Lowering the SR 99 tunneling machine’s front end back into the access pit

Seattle's Big Bertha tunnel drill blocked by mystery object

Jumbo transports largest tunnel boring machine 'Bertha'

Mammoet - Details of TBM Bertha's recovery lift and repair program

Marine Salvage and Offshore

Raw video of Bertha in operation (Jan. 6, 2016)

TBM Bertha repair update

TunnelTalk Extra

INCREDIBLE SWITZERLAND BIGGEST TUNNEL BORING MACHINE DIAMETER-HOW DOES TUNNEL BORING MACHINE WORK?

Science & Technology UI

Biggest And Fastest Tunnel Boring Machine (The Bertha)

SAVCO GEEK DESIGNS

World's most expensive breakdown? Bertha got stuck for a year under Seattle after digging 1,000ft

Ritom Pumped-Storage Plant Project – Tunneling under extreme conditions