WATCH: Drone video shows progress on Bertha’s tunnel in Seattle
Oct 20, 2017, 11:02 AM | Updated: 1:43 pm
Bertha may have been torn apart, but the work continues on the tunnel under Seattle. A new video from the Washington State Department of Transportation shows just how far along the project is coming.
RELATED: Watch Bertha break through to the surface
The video was taken using a drone passing through the tunnel.
Tunnel progress
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 corbels shown in brown, inside the tunnel. (WSDOT)
- Launch pit: 96 percent
- Northbound walls: 94 percent
- Southbound roadway: 85 percent
- Southbound west walls: 72 percent
- Southbound west walls (upper half) and east walls: 45 percent
- Disassembly pit: 5 percent
As MyNorthwest previously reported, the Alaskan Way tunnel won’t just be a passageway; it 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:
- Hangers (NB): 74 percent
- Hangers (SB): 12 percent
- Lighting (NB): 60 percent
- Lighting (SB): 3 percent
- Mesh and fire proofing (NB): 68 percent
- Fire suppression (NB): 42 percent
- Mesh and fire proofing (SB): 12 percent
- Fire suppression (SB): 3 percent
You can find an interactive map of the Alaskan Way project here.
