Posted on December 1, 2013December 1, 2013 by WillemSunday/ where’s Bertha now? Bertha, Seattle’s tunnel boring machine, is making some progress. Check out the Washington State Dept of Transportation’s web page here. Here’s what the inside of the tunnel looks like. The tunnel is almost 60 ft wide. (It looks wider than that, actually .. probably the wide-angle lens of the camera that does that). Look for the ‘tiny’ human walking toward the exit. There will be two decks for traffic inside the tunnel when it is complete, with a little bit of room at the bottom, the top and the sides for utilities and for escaping out of the tunne Information and a map from the Washington State Dept of Transportation (WSDOT) about the tunnel-boring machine Bertha.