Is the tunnel under Seattle finished?

Is the tunnel under Seattle finished?

The tunnel boring machine “Bertha” began digging the SR 99 tunnel in 2013. Bertha completed her dig in 2017 and the tunnel opened to drivers on February 4, 2019. The SR 99 tunnel was one of 30 projects that together comprise the Alaskan Way Viaduct Replacement Program.

What stopped Big Bertha in Seattle?

The Washington State Department of Transportation said Friday that the steel pipe that stopped Bertha, as the borer is nicknamed, on Dec. 6 is a 119-foot-long well casing installed in 2002 to study groundwater movement under downtown Seattle.

How long was Big Bertha stuck?

two years
After 4 Years, Seattle’s Giant Tunneling Machine Finally Breaks Through. Bertha, the largest boring machine in North America, has reached the light at the end of the tunnel, after getting stuck, and sitting motionless underneath the city for two years. Bertha has broken through. by chewing its way to daylight.

What happens to Bertha after tunnel?

What happens to Bertha once the job is done? Bertha’s front end will be carved up and trucked away. The rest will be pulled out of the Sodo end of the tunnel. Some pieces like motors, hoses, wire and conveyor belts could be reused.

How deep is the Seattle tunnel?

At its lowest point, the tunnel crown is at elevation -95 feet, and it is 215 feet deep at its greatest depth below grade. Development along the alignment consists of on-grade and elevated roadways, buildings ranging from single-story to high-rise structures, railroad and sewer tunnels, and public and private utilities …

Is there a city underneath Seattle?

The Seattle Underground is a network of underground passageways and basements in the Pioneer Square neighborhood of Seattle, Washington, United States. They were located at ground level when the city was built in the mid-19th century but fell into disuse after the streets were elevated.

How deep is the Seattle light rail?

Potential station depths driven by variety of factors