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tunneling machine

Many of Big Bertha's cutter-head openings are clogged with dirt and debris. (Credit: Washington Department of Transportation)

Fixing Seattle Tunneling Machine Will Take Months

Wash. DOT says many of Big Bertha’s cutter-head openings are clogged with dirt and debris.

02/11/2014

file photo of a tunnel boring machine in Italy (photo credit: GIUSEPPE CACACE/AFP/Getty Images)

3-Foot Chunk Stuck In Tunneling Machine

Crews have found a hard object more than 3 feet wide lodged in the tunneling machine that’s currently stalled 60 feet under the city of Seattle, officials said Wednesday.

CBS Seattle–01/22/2014

Photo Credit: Thinkstock

City Tunneling Project Begins

The world’s largest tunneling machine is sinking its teeth into the soil under downtown Seattle.

CBS Seattle–07/30/2013