Seattle Tunnel
Alaskan Way Viaduct demolition is complete
Bye forever, viaduct!
A quick guide to Seattle’s SR 99 tunnel
Everything you need to know about the toll road lurking beneath downtown.
Alaskan Way Viaduct demolition officially begins
It started with a chunk of the Columbia Street onramp
The last days of the Alaskan Way Viaduct
With final drives, walks, and rides, Seattleites sent off the aging highway.
What public transportation is—and isn’t—doing during the Seattle Squeeze
As Seattle heads into a three-week traffic, there are some added transit options—and missed opportunities
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!
Historic photos show Seattle’s waterfront before the Alaskan Way Viaduct
A peek at a highway-free neighborhood
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
Here’s what State Route 99 tunnel tolls could look like
Tolls will likely be between $1 and $2.25—but the state is still working out timing
The Battery Street Tunnel will become rubble storage, not public space
Dreams of adaptive reuse were dashed at this week’s City Council meeting
With final piece of roadway in place, the SR 99 tunnel begins to take shape
There’s still a lot of work to do before the long-delayed tunnel opens to cars—but it’s getting there
Watch the layers of the new Seattle downtown tunnel fill in Bertha’s pit
A new WSDOT video shows how the roadway stacks up
New tool helps you keep track of all Seattle’s waterfront construction
What’s happening right now—and what’s happening in through 2023?
Time lapse video shows SR 99 tunnel coming together
Watch the roadway being constructed
SR 99 tunnel’s lower deck arrives as upper deck nears completion
The tunnel’s on track to open in 2019
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.
WSDOT finishes earthquake-flexible Highway 99 bridge
The just-completed South Dearborn Street Off-Ramp Bridge won’t carry cars for a long while—but it’s notable for its earthquake-safety technology.
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.
Cary Moon announces mayoral candidacy
Urban planner and engineer Cary Moon has announced that she’s running for mayor.
Mike McGinn enters the mayoral race
Former Seattle mayor Mike McGinn announced today that he’d be seeking another term.
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
Seattle traffic hitting limits
Get ready to share the ride even more