clock menu more-arrow no yes mobile


Alaskan Way Viaduct demolition is complete

Bye forever, viaduct!

WSDOT digs up five-year-old tunnel onramp as opening day approaches

There’s a new onramp to the new tunnel—but it’s been here all along!

Here’s how State Route 99 will be redirected through the tunnel

The whole process will take about three weeks

Tunnel opening celebration is also a chance to say goodbye to the Viaduct

One last chance to walk, run, or ride this February

The Alaskan Way Viaduct will close forever on January 11

The long-awaited retirement of the doomed stretch of SR-99 has a date

The State Route 99 tunnel gets its stripes—and giant running stick figures

The tunnel could open this fall

Watch the layers of the new Seattle downtown tunnel fill in Bertha’s pit

A new WSDOT video shows how the roadway stacks up

Tour the SR 99 tunnel in two-minute drone video

Travel the tunnel’s two-mile span a couple of years early.

Bertha is officially completely dismantled

RIP forever, Bertha.

See Bertha’s disassembly inside the State Route 99 tunnel in new video

Nearly four months after completing its journey into the disassembly pit after digging the two-mile-long State Route 99 tunnel, tunnel-boring machine Bertha is half-dismantled.

Watch Bertha come apart in new WSDOT video

Sped up in a time-lapse video, it’s exciting—and a little satisfying—watching the machine come apart. Watch seven weeks of disassembly in one minute.

Bertha’s disassembly has begun: Watch the first piece leaving the pit

The tunnel-boring machine that dug the Alaskan Way Viaduct replacement tunnel has started coming apart.

Inside the Highway 99 tunnel’s safety engineering

We spoke with contractor HNTB about what will keep the State Route 99 Viaduct replacement tunnel safe from fires, floods, earthquakes, and pollution.

Bertha fully emerges into the disassembly pit

Bertha, the boring machine that drilled the Alaskan Way Viaduct replacement tunnel, has fully emerged from the tunnel into the disassembly pit.

Watch Bertha get its braces off in preparation for disassembly

Late Wednesday, crews finished removing wall braces standing between tunnel-boring machine Bertha and the disassembly pit.

Watch Bertha’s breakthrough highlights in a WSDOT video

In case you missed the big moment

Remembering broken promises about Bertha

We heard a lot of things about what would happen with the tunnel project—and a many of those stories didn’t come true.

Bertha finishes digging the Alaskan Way Viaduct replacement tunnel

After nearly four years, Bertha has finished digging SR 99 tunnel.

Watch Bertha break through

After more than three years of drilling, Bertha’s journey is coming to an end on Tuesday—and the big moment is being livestreamed.

Bertha is 127 feet from the finish line

Bertha won’t see daylight this week, but the tunnel boring machine is nearing the finish line.

Bertha could reach wall at end of tunneling route this week

WSDOT announced that Bertha, the boring machine drilling the SR 99 tunnel, was just 320 feet from the finish line.

See inside Bertha the tunnel boring machine

WSDOT gives an up-close and personal look inside Bertha in a new 360 video.

Bertha resumes tunneling after course correction

Bertha, the tunnel boring machine currently digging the State Route 99 tunnel, is back to work after an adjustment.

Bertha burrows into Zone 9 and under SR 99

Tunnels passing under tunnels, Seattle’s basement maze

Bertha’s back at work, check out the video

Working on Bertha is like scuba diving in air

Seattle traffic hitting limits

Get ready to share the ride even more

Wired labels 520 bridge majestic

Congratulations to WS DOT for being Most Buoyant

From jeers to cheers for Bertha

Bertha punched through as much criticism as rock in 2016

Bertha’s side effects clear arteries

What happens to SR99 affects its neighbors

Bertha now 70 percent done as 1,000th ring assembled

Watch two WSDOT videos to see what’s happening in Seattle’s basement

Bertha hits it’s deepest point underneath Seattle

The tunnel boring machine is now 60 percent done with her journey

WSDOT installing quake-resistant bridge

Bendable bridges could bounce back after a quake

Break out the balloons, Bertha crosses the mile mark

5,280 feet down, 3,990 feet to go

Here’s 5 Seattle-based costume ideas for Halloween

Forget superheros and zombies, spend Halloween as something much more Seattle-y

After quicker-than-expected break, Bertha is digging again

These days, Bertha seems to get going a lot faster than expected

Bertha now under Pike Place Market, halfway home

The tunnel boring machine is actually staying on schedule these days

Bertha now under The Showbox, 4,239 feet into journey

The tunnel boring machine is making good time these days

Bertha tunnels past the 4,000 foot mark under Seattle

Ever since she restarted, Bertha has been moving forward without many problems

Bertha overruns now $223M, tunnel opening pushed to 2019

As a reminder, Bertha was originally supposed to be surface in South Lake Union in October 2014 and the tunnel was supposed to open by the end of 2015.