Drone video shows progress on Bertha’s tunnel in Seattle

This video illustrates how drones can go where helicopters fear to tread, and the use of drone videos and scanning to monitor and report construction and engineering progress.

A new drone video from the Washington State Department of Transportation shows just how far along the project is coming.

The new transport tunnel under Seattle was drilled and recently completed by ‘Bertha’, a massive tunnel boring machine.

As of October 2017, the only parts of the tunnel that are completely finished are the corbels — the pieces that hold the walls and roadways in place. Other portions, built on top of the corbels are coming along.

The Alaskan Way tunnel will be a living, breathing machine once it is completed. A web of interconnected pumps, lights, vents, and other systems will keep the traffic flowing. Work on those systems is also underway.

 

Source: Drone video shows progress on Bertha’s tunnel in Seattle