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Architecture & Engineering
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Design Perspectives By Clair Enlow |
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April 28, 2010
Design Perspectives: Will Seattle emerge whole from the tunnel project?
By CLAIR ENLOW
Special to the Journal
Special to the Journal
Image courtesy of WSDOT
[enlarge]
The deep bore tunnel being studied as part of the Alaskan Way Viaduct replacement will carry four lanes of traffic under downtown Seattle. Much of the two-mile-long tunnel will go through glacial till, reaching a depth of 220 feet. A panel of experts is helping WSDOT to manage the risks of design and construction, but the subject of who pays for any cost overruns may have to be settled in court.
The deep-bore tunnel, a two-mile segment of state Route 99 that is proposed to pass underneath downtown Seattle, is on track. Groundbreaking is set for the last half of 2011, with the tunnel opening in 2015.
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Previous columns:
- Design Perspectives: Can a city be carbon-neutral? Seattle wants to find out, 03-10-2010
- Design Perspectives: The waterfront could be center of a greener Seattle, 02-10-2010
- Design Perspectives: There's a lot to be gained in lowrise zones, 01-27-2010
- Design Perspectives: Can Pioneer Square fill the Elliott Bay Book void?, 12-30-2009
- Design Perspectives: Building can take forever in the Eternal City, 11-18-2009
- Design Perspectives: Italian hill town makes a deal with the auto age, 09-30-2009
- Design Perspectives: The train's not there yet, but Northgate has arrived, 08-05-2009
- Design Perspectives: On the waterfront, it's first things first, 07-01-2009