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The Today File

Your guide to the latest news from around the Northwest

September 5, 2012 at 10:55 AM

Highway 99 tunnel drill is 10 times taller than you are

The world’s biggest tunnel boring machine, at 57.5 feet in diameter, is now being assembled by Hitachi-Zosen in Osaka, Japan, before being shipped to Seattle next year to drill the Highway 99 tunnel.

This photo was published on Flickr by the Washington State Department of Transportation, and more can be found on the tunnel project homepage.

On Thursday night, the public can go on a 1-mile walking tour around the launch pit in Sodo.  The tour begins at 6 p.m. at Milepost 31, the state’s tunnel interpretive center at 211 First Ave. S., which contains a 10-foot-long scale model of the boring machine.

More information can be found through the Milepost 31 website.  Tunnel drilling begins in summer 2013, with the $2 billion, four-lane tube scheduled to handle traffic, at a yet-undetermined toll rate, by the end of 2015.

 

 

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