sr 99 tunnel project construction updatesdot.wa.gov/projects/viaduct/media/default/documents/parking...
TRANSCRIPT
SR 99 Tunnel ProjectCONSTRUCTION UPDATES
Bertha Begins Her Journey
Three Days Later…
Building a Tunnel Ring
Tracking Bertha’s Progress
Receiving Pit Excavation Progress
Viaduct Column Painting Completed!