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Lady Bird is installed below Washington D.C. before getting to work last year.

Lady Bird is the 1,300-ton tunnel-boring machine...

Posted by Wayne Grayson on Mar 19, 2014

Each year in Washington, D.C., about 2 billion gallons of raw sewage is dumped into the Potomac River, the Anacostia River ...

Big Bertha, world’s largest tunnel-boring machine, lowered into starting position in Seattle

Big Bertha, world’s largest tunnel-boring...

Posted by Wayne Grayson on Jun 05, 2013

With the digging of the Washington State Route 99 tunnel in Seattle scheduled to start in July, the Washington State Department of ...

Big Bertha, world’s largest tunnel-boring machine, arrives in Seattle

Big Bertha, world’s largest tunnel-boring...

Posted by Wayne Grayson on Apr 04, 2013

The "Big" in Bertha's name isn't there for the catchiness. It's there because it's apt. With a 57-foot diameter and a ...

NYC tunnel expansion the largest transportation project in U.S.

NYC tunnel expansion the largest transportation project...

Posted by Wayne Grayson on Feb 28, 2013

New York City is undergoing the biggest addition to its transportation system since Penn Station opened in 1910, Time reported. ...

Japanese tunnel collapses, kills 9

Japanese tunnel collapses, kills 9

Posted by Amanda Bayhi on Dec 04, 2012

Aging bolts are a possible culprit behind the collapse of concrete ceiling slabs that fell from the roof of a ...

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