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SR 99 tunnel
VIDEO: Bertha sees daylight, finishes 1.7-mile boring work for SR 99 tunnel
Sixty-four years after the Alaskan Way Viaduct was first opened to traffic, Bertha, the world’s largest tunnel boring machine, ...
VIDEO: A 360-degree view inside Bertha and construction of the SR 99 tunnel
The Washington State Department of Transportation (WSDOT) has created a video featuring 360-degree views inside the SR 99 tunnel ...
Bertha stopped after veering off course in home stretch of Seattle’s SR 99 tunnel
Seattle Tunnel Partners (STP) stopped Bertha, the largest tunnel boring machine in the world, on Feb. 28 to make ...
PHOTOS > Big Bertha gets her head together: How to repair the world’s largest tunnel machine
With the final repairs having been made earlier this summer and Big Bertha finally picked back together underground, Washington ...
From our partners
Presented By: Sonetics
Construction News: 5 Boom Cities of 2017
It's shaping up to be a big year in construction for New York City, Chicago, Los Angeles, San Francisco and Seattle. Here's the good construction news.
Damage to Big Bertha worse than previously thought
Now that crews are well into the process of dismantling her front-end for necessary repairs, it's clear that damage ...
Board rules WSDOT should have given contractor more warning about pipe struck by Big Bertha before stall
In regard to the drilling of the new State Route 99 tunnel below Seattle, the Washington State Department of ...
Water main damaged by Big Bertha repair excavation could cost WSDOT $4 million
Four months after crews temporarily stopped excavation on a repair pit for the world's largest tunnel-boring machine due to ground ...
PHOTOS: Big Bertha’s 2,000-ton front end lifted to the surface. How the world’s largest tunneler was raised
After a year of slumber and almost a month after chewing her way into a 12-story repair pit, Big Bertha, ...
PHOTOS: Fixing Bertha: How workers dug a 12-story pit to raise world’s largest tunnel boring machine from the dead
No. 8 Story in 2015 « No. 9 No. 7 » The Big Bertha saga recently received a major update: ...
Excavation stopped on Big Bertha repair pit due to major ground sinkage in area
The latest in a long string of delays to affect tunnel-boring machine Big Bertha has far greater implications than any of ...
Repairs to Big Bertha will include 86 tons of steel reinforcement to tunnel-boring machine’s bearing, cutter drive
The largest tunnel-boring machine in the world needs a bit of reinforcement against the "wet and abrasive soils" deep ...
Big Bertha, world’s largest tunnel-boring machine, arrives in Seattle
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 ...
Backhoes are getting better as CTLs, compact excavators chip away at market share
Test Drive: 2017 Chevrolet Silverado 2500 4×4 is a pickup built to tow—and keep you connected
Caterpillar will move global HQ to Deerfield, lll., beginning this year
John Deere unveils Fixstern: A lightweight vision for the backhoe of the future (VIDEO)
Ford files patent for sliding pickup bed
Dragged to his death: How to prevent chipper accidents
GO TO SAFETY WATCH
Caterpillar will move global HQ to Deerfield, lll., beginning this year ...
by Wayne Grayson
John Deere unveils Fixstern: A lightweight vision for the backhoe of ...
by Marcia Gruver Doyle
Test Drive: Kenworth’s T880S is a more versatile replacement for the ...
by Jason Cannon
Cat D8T moves more at less cost with several new options ...
by Wayne Grayson
Kobelco launches slew of new excavators, improved models
by Don McLoud
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