Tunnels Under Seattle

August 19, 2011 Published in the September 2011 issue of Seattle Met

$80 million
Estimated price of the drill—made by Japanese company Hitachi Zosen—that will bore the tunnel replacing the Alaskan Way Viaduct section of Highway 99

57.4 feet
Width of the drill

1.7 Miles
Length of the proposed Alaskan Way tunnel

3.15 Miles
Total length of the twin-bore tunnel another Hitachi Zosen drill is digging through Capitol Hill, as part of the University Link light rail, for transit between the University of Washington and downtown Seattle

13 Miles
Length of the 13-foot-wide tunnel being drilled from Point Wells on the coast of Puget Sound to the Brightwater sewage treatment plant in Woodinville

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