Cause of Seattle tunnel machine stall unknown

SEATTLE — After sending six probes into the ground in downtown Seattle, workers are still not sure why a giant tunnel boring machine is stuck under the city.

The Seattle Times reports those probes into the soil in six locations in front of the tunnel machine haven’t bumped into any huge obstructions.

Project leaders originally speculated an unusually wide bolder, deposited by ancient glaciers might be blocking the machine known affectionately as Bertha.

The machine is about 60 feet under Seattle streets and about one-tenth of the way toward completing a 1.7-mile tunnel. It will carry Highway 99 traffic and allow the demolition of the Alaskan Way Viaduct on the waterfront.

Progress on the tunnel has been halted since Dec. 6.

More in Local News

Herald photos of the week

A weekly collection of The Herald’s best images by staff photographers and… Continue reading

Trail work by juvenile offenders builds resumes, confidence

Kayak Point trails were built out this year by groups from Denney Juvenile Justice Center.

Volunteers clean up homeless camp infested with garbage

The organization’s founder used to live and do drugs in the same woods.

Flooding still a concern on Snohomish River

Flood warning in effect until Monday afternoon for Monroe and Tuesday morning for Snohomish.

Families begin relocating from public housing complex

Baker Heights is in need of repairs deemed to costly to make, and will be demolished and replaced.

Everett mayoral campaign is one of the priciest ever

Many campaign donors are giving to both Cassie Franklin and Judy Tuohy.

Arrests made in robbery-turned fatal Everett shooting

A man, 24, and woman, 18, were found at a hotel in Seattle.

3 fire departments seek levies to support emergency services

District 25 in Oso is hoping to pass its first fire levy in 22 years.

Front Porch

JUST FOR YOUTH Build with balloons Youth in fourth grade and up… Continue reading

Most Read