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Potential 710 Tunnel Trouble

Published on Saturday, February 28, 2015 | 6:29 am
 

They call it “Bertha,” the massive tunnel-boring machine that arrived Seattle in July, 2013. Seattle city officials expected a tunnel underneath the city to be completed this year. The machinery has remained motionless since December 2013 after it was damaged. Now no one in the City of Seattle is saying when work will restart and be completed.

It might be fascinating, admits South Pasadena City Manager Sergio Gonzalez, talking about a boring machine that could work its way under the city someday, but the reality is they can fail miserably.

A case in point in what might happen close to home, explained Gonzalez, can be found in the Northwest where an underground tunnel project has been less than successful. The “Bertha” drilling machine, as it is known to those living in Seattle, got stuck in the ground not long after arriving in 2013. Only 11 percent of a two-mile tunnel route is complete to date. City officials can’t confirm when the project will resume or be completed, yet some are projecting sometime in 2017 – long past its 2015 timetable.

“The boring machine broke down more than a year ago,” stressed Gonzalez. “It’s broken down, stalled. Not only is it causing cost overruns, but it’s causing physical damage to the area.”

In Seattle, a 120-foot-deep pit has been dug to allow a giant crane to pull out the “Bertha” drilling machine and repair it.

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