John Hennessy III,
P.E.
An overview of the reasons why the new SR 520 floating bridge was built on Lake Washington, and some of the solutions the project team developed to efficiently build the world’s longest floating bridge. The project won a 2016 Excellence in Design (Engineering) Award from the Design-Build Institute of America.
View this complete post...The second cycle of six pontoons for a replacement State Route 520 floating bridge were towed out of the Concrete Technology Corporation casting basin in Tacoma, Wash., from Jan. 28 to Jan. 31, 2013. In this time-lapse video, crews maneuver a large T-pontoon into position to add the additional floatation needed to tow the supplemental […]
View this complete post...WSDOT and contractor crews closed the SR 520 floating bridge and highway July 13–16, 2012, to tackle an array of jobs, including demolition of the old 84th Avenue Northeast overpass and the last remaining piece of the old 92nd Avenue Northeast overpass, both seen in this video segment. Overpass demolition made way for new lidded […]
View this complete post...Crews working for WSDOT hustle to set 42 girders for a new lidded overpass on SR 520. See how much progress is made from a weekend closure of the roadway. – wsdot on YouTube
View this complete post...Crews installed two million pounds of concrete girders for future lidded overpasses on SR 520 the weekend of Jan. 13 to 16. Work occurred at 92nd Avenue Northeast and Evergreen Point Road. The SR 520 Eastside Transit and HOV Project widens SR 520 from four to six lanes from Medina to Bellevue and includes rebuilding […]
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COALITION FOR A SUSTAINABLE SR 520
SR 520 is one of two east-west roadways across Lake Washington. Approximately 115,000 vehicles carrying 190,000 people travel the SR 520 Evergreen Point Bridge every day.
Washington is dangerously close to its constitutional debt limit. SR 520 is dangerously close to the end of its useful life. The state is advocating a construction plan that can’t legally be paid for.
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