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Tag: Bertha
Roadbuilding
Virginia’s largest ever infrastructure project involves tunnel boring machine
Construction for Virginia's Hampton Roads Bridge-Tunnel Expansion is underway. Watch VDOT explain the tunnel boring process here on Equipment World.
November 5, 2020
Roadbuilding
State Route 99 closed in Seattle for tunnel alignment; crews making good progress
With the closure of State Route 99 due to tunnel work, construction crews are on schedule with good weather, including unusually warm daytime temperatures.
January 18, 2019
Roadbuilding
Last road panel installed in Seattle SR-99 tunnel dug by Bertha
The Washington State Department of Transportation reports that the last of 1,152 road panels have been installed on the new State Route 99 tunnel, which will replace the Alaskan Way Viaduct. The panels form the lower deck of the double-deck highway, which will allow drivers to travel under downtown Seattle as a bypass or stay […]
April 2, 2018
Roadbuilding
Final piece of Bertha removed from Seattle’s SR 99 tunnel
The last piece of Bertha, the world’s largest tunneling machine, has been removed from Seattle’s SR 99 tunnel, marking the end of a four-month disassembly process. The machine finished its boring of the tunnel in early April, work that lasted four years. This breakthrough was roughly three years later than the original projected completion date, […]
August 25, 2017
Roadbuilding
Bertha is half disassembled, cutterhead completely removed
Bertha, the world’s largest tunnel boring machine at 8,000 tons, has been half disassembled by Seattle Tunnel Partners and all of the machine’s cutterhead has been removed. Washington State Department of Transportation (WSDOT) reports that much of the trailing gear is still inside the Alaskan Way Viaduct. Crews are continually working to cut and haul […]
July 17, 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
Business
Year in Review: The Biggest Construction Equipment News Stories of 2016
While everyone has their sights on ConExpo in March, it might be easy to overlook what a busy year 2016 turned out to be. Here’s an quick overview, plus a timeline, of what happened in the construction equipment industry last year. Bonus: check out our editors’ quick predictions for 2017 on page 30. (Note: In order to meet […]
December 22, 2016
Home
The engineering behind the new earthquake-proof bridge near Seattle’s SR99 tunnel project
The bridge being built near the south entrance of the tunnel for the State Route 99 project under Seattle is designed to be earthquake-proof, King 5 reports. If that project sounds familiar that’s because it’s the tunnel being dug by Bertha, the largest tunnel boring machine in the world and a piece of equipment whose exploits we’ve […]
November 21, 2016
Roadbuilding
Bertha pushes past halfway point of tunneling for Washington’s SR 99
Bertha, the largest tunnel-boring machine in the world, has made it past the halfway point of its 9,270-foot journey beneath Seattle to create a tunnel for State Route 99. The tunnel will replace the Alaskan Way Viaduct and is expected to open to traffic in early 2019, according to the Washington State Department of Transportation. […]
October 4, 2016
Roadbuilding
Bertha’s repairs push Seattle’s SR99 tunnel $200 million over budget. And it could get worse
Following two years of costly repairs and downtime, Bertha, the world’s largest tunnel boring machine, is $223 million over budget, with Washington state facing a lawsuit from the prime contractor on the State Route 99 tunnel project that, if successful, would double that amount. According to a report from the Seattle Times, the 1.7-mile tunnel, which will replace the […]
July 27, 2016
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