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

District takes steps to secure school campuses

Safety measures have been enhanced at Hawthorne and Silver Firs elementary schools in Everett.

Local police join thousands honoring slain Canadian officer

Abbotsford Const. John Davidson was killed Nov. 6 in a shootout with a suspected car thief.

Hard work is paying off for Mariner High senior

Mey Ly has excelled in school since moving here from Cambodia; she also serves as an intrepreter.

1 arrested after SWAT team moves in on Marysville house

The incident was connected to an earlier robbery.

Darrington School Board race might come down to a coin flip

With a one-vote difference, a single ballot in Skagit County remains to be counted.

Herald photos of the week

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

No easy exit from Smokey Point shopping complex

There’s just no easy exit on this one. A reader called in… Continue reading

County Council upholds ban on safe heroin injection sites

At Monday’s public hearing, more than 15 people spoke in support of the ban. No one spoke against it.

Lynnwood, Marysville, Sultan consider ban on safe injection sites

If approved, they would join Lake Stevens and Snohomish County, which have temporary bans.

Most Read