The Seattle Underground Tour is already a popular attraction, but KIRO Radio’s Tom and Curley think they could have an expansion on their hands. If tunnel boring machine Bertha can’t get up ...

The Dori Monson Show listeners have spoken. The boring machine called Bertha will now be known as “Christine.” Monson said it was time for a new name as Bertha was named in honor of former ...

Big Bertha tells the story of the machine that changed all that — or, more accurately, was the reason for it. This engineering marvel made history by creating the longest and widest road tunnel in the ...

Bertha is done digging. After four years of moving — and sitting broken for a while — underneath downtown Seattle, the world’s largest tunnel-boring machine on Tuesday reached the end with ...

[1/2]A worker monitors cable pulley wheels as the machine head from Bertha, the world's largest tunnel-boring machine, is lifted from an access pit for repairs in Seattle, Washington March 30, 2015.

Bertha's dirt-eating days are over — for at least six more months. Bertha's dirt-eating days are over — for at least six more months. The world’s largest tunneling machine, stuck underground ...

Seattle Tunnel Partners spent the summer cutting the tunnel boring machine and her 5-story-tall cutterhead into pieces, lifting them out of the receiving pit and trucking them away. That process ...

Tunnel boring machines are the true titans of modern construction, with massive machines like Bertha and Heron Connect revolutionizing the way cities are built. These colossal machines can carve ...

SEATTLE (AP) – Experts say they’ve at least partially solved the mystery of what’s been blocking a massive tunnel-boring machine beneath downtown Seattle for the past month: a steel pipe ...

After a two-year delay for repairs, the giant tunnel-boring machine has completed its mission far beneath the city's streets. Bertha Finally Breaks Through In Seattle Updated at 4 p.m. ET It was ...

Seattle Tunnel Partners is deciding how to fix broken seals on the world’s largest tunneling machine, called “Bertha,” which is stuck about 60 feet underground. It’s been mostly idle for ...