[VIDEO] Watch How 14,260 Concrete Segments were Made for Seattle Tunnel's Outer Wall
This video shows how the precast, curved concrete segments that form the outer wall of the SR 99 Tunnel were made
Aug 17, 2016
Latest in Video Network
Why Municipalities Should Attend PAVE/X
December 11, 2025
Asphalt Industry Reacts To LeeBoy, FAYAT Deal
June 26, 2025




![[VDIEO] Watch Workers Change Cutting Teeth on Seattle Tunneling Machine Bertha](https://img.forconstructionpros.com/files/base/acbm/fcp/image/2016/07/default.57864fbecf578.png?auto=format%2Ccompress&fit=crop&h=167&q=70&w=250)
![[VIDEO] Drone Flies Through Seattle's SR 99 Tunnel Bertha is Digging](https://img.forconstructionpros.com/files/base/acbm/fcp/image/2016/05/default.5730a946c2f00.png?auto=format%2Ccompress&fit=crop&h=167&q=70&w=250)

![[VIDEO] Caterpillar Shows How Virtually Reality Can Improve Field Diagnostics](https://img.forconstructionpros.com/files/base/acbm/fcp/image/2016/06/default.5764340cc06b3.png?auto=format%2Ccompress&fit=crop&h=167&q=70&w=250)











