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Tag: SR 99 tunnel
Roadbuilding
WSDOT details demo plans for the Alaskan Way Viaduct in Seattle
Washington State Department of Transportation has detailed their plans to demo the Alaskan Way Viaduct in Seattle. Learn more on this on Equipment World.
January 17, 2019
Roadbuilding
Flight through Bertha’s tunnel shows SR 99 construction progress
The drone footage below, from the Washington State Department of Transportation (WSDOT), takes you on a tour of the SR 99 tunnel that tunnel boring machine Bertha excavated under Seattle. The drone enters the end of the tunnel nearest the Space Needle and travels through the tunnel to the other end near the stadiums. The […]
November 1, 2017
Roadbuilding
WSDOT creates online open house for Alaskan Way Viaduct demolition
The Washington State Department of Transportation (WSDOT) has created an online open house to offer the public a view of plans to demolish the old Alaskan Way Viaduct after the new SR 99 tunnel opens in early 2019. Bertha, the world’s largest tunnel boring machine, finished the outer wall of the SR 99 tunnel in […]
August 8, 2017
Roadbuilding
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, broke through the end of a more than 9,270-foot tunnel for Seattle’s SR 99. “This is a historic moment in our state’s transportation history,” says Washington State Gov. Jay Inslee. “Innovation and perseverance are the engines […]
April 6, 2017
Roadbuilding
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 as Bertha, the world’s largest tunnel boring machine, makes its way underneath Seattle. The department says this feature provides the best way to provide a view of the “record-breaking size” of the tunnel without taking a […]
March 14, 2017
Roadbuilding
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 adjustments before it continues on its last 1,000 feet of the 9,270 tunnel for SR 99. Officials report recent surveys indicate the machine is potential out of alignment by several inches. “STP is conducting additional survey […]
March 3, 2017
Roadbuilding
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 State Department of Transportation and Seattle Tunnel Partners crews are hopeful that their 18-month nightmare is nearing a close. Now two years behind schedule, the world’s largest tunnel-boring machine is pegged for a return to digging in […]
September 29, 2015
Roadbuilding
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 to Big Bertha, the world’s largest tunnel-boring machine, is worse than previously thought. Making matters worse, the tunneler likely won’t resume its work drilling the State Route 99 tunnel beneath Seattle by August as the project’s […]
May 26, 2015
Roadbuilding
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 Transportation (WSDOT) has few friends left. There remains disagreement between the department and the city of Seattle over who will pay to repair a water main damaged during the excavation of a repair pit for Big Bertha, […]
May 12, 2015
Roadbuilding
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 sinkage, Seattle officials have now identified a major repair needed on a water main damaged by the sinking. Back in December, excavation stopped on the repair pit through which Big Bertha’s massive cutterhead was recently lifted as officials suspected groundwater pumping […]
April 14, 2015
Roadbuilding
PHOTOS: Big Bertha’s 2,000-ton front end lifted to the surface. How the world’s largest tunneler was raised
[imagebrowser id=225] After a year of slumber and almost a month after chewing her way into a 12-story repair pit, Big Bertha, the world’s largest tunnel-boring machine, is finally under repair in Seattle. Crews worked for the better part of March to disassemble the machine’s front end before lifting the machine’s cutterhead and body shield panels—a […]
April 1, 2015
Roadbuilding
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 »  [imagebrowser id=194] The Big Bertha saga recently received a major update: crews with lead contractor Seattle Tunnel Partners have finished digging the 120-foot pit that will be used to access the world’s largest tunnel boring machine for necessary repairs. Now that the pit […]
February 11, 2015
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