The Seattle Times » The massive drill has veered a few inches off course.
GeekWire » The Washington State Department of Transportation (WSDOT) takes viewers on a behind the scenes construction tour of the new double-deck State Route 99 tunnel. WSDOT’s Deputy Administrator explains how the tunnel boring machine, known as Bertha, works to dig through the ground and place concrete rings to form the tunnel wall as she goes. Watch […]
GeekWire » Seattle Tunnel Partners (STP) has released a video of construction crews performing routine maintenance on Bertha, the tunnel boring machine, which includes power washing the cutting head and replacing cutting tools that weight 75 pounds each. Bertha is outfitted with 700 cutting tools (or teeth). During this maintenance stop STP has inspected 400 teeth, replacing […]
The New York Times » According to this investigatory report by The New York Times, the consortium that was awarded the $3.1 billion Panama Canal (“Panamax”) contract is seeking $3.4 billion in excess expenses. Construction on the megaproject was completed two years behind schedule due to internal disputes, work stoppages, porous concrete, cracks in the concrete, and water […]
The Seattle Times » The Alaskan Way Viaduct was scheduled to be closed for two weeks beginning on April 29 so Bertha, the tunnel boring machine, could work under the existing tunnel and move forward 385 feet. The Alaskan Way Viaduct reopened five days earlier than scheduled, but Bertha still needs to finish boring the remaining 73 […]