Daily Journal of Commerce » Steve Peer of the Washington State Department of Transportation (WSDOT) answers the most frequently asked questions about the new State Route 520 floating bridge in Seattle, Washington. The 520 bridge is the world’s longest floating bridge, and this article provides a detailed explanation of its technology.
The Seattle Times » In January 2016, a geotechnical expert for the Washington State Department of Transportation (WSDOT) warned officials of possible over excavation and ground loss one day before a sinkhole appeared 110 feet behind the tunnel boring machine’s cutting face. WSDOT and their consulting engineers are concerned about the contractor’s ability to maintain soil […]
Bloomberg Business » The Panama Canal will soon be able to accommodate vessels carrying 12,600 containers, which is three times its current capacity. The $5.3 billion expansion project is 97% complete, and is expected to open on June 26, nearly two years behind schedule.
The Seattle Times » Sound Transit’s tunnel boring machine, known as Pamela, stalled while digging through hard ground just north of the new University District’s Station in Seattle, Washington. Pamela was stuck for six weeks, and is slowly on the move again after limited repairs. Extensive repairs will take place when Pamela reaches the next underground […]
The Seattle Times » The Seattle Tunnel Partners (STP), the contractor on the Highway 99 tunnel project, submitted a report to Washington state officials to explain why a sinkhole formed near Bertha’s (the tunnel boring machine’s) repair site. In a statement, Governor Inslee said the information provided was insufficient.
The Seattle Times » Seattle Tunnel Partners (STP) disagrees with the stop work order issued by Washington State Governor Inslee. STP contends its response to the sinkhole was appropriate, and believes the risk for additional sinkholes is increased if drilling stops now. This article highlights a few of the findings listed in STP’s root cause analysis, […]