Caltrans engineers are scrambling to replace Pfeiffer Canyon Bridge, a 317-ft-long, concrete continuous box-beam bridge on a key coastal highway after mudslides moved one of the support columns more than a foot, causing the span to crack and bow.
After a final, Feb. 28-March 6 maintenance stop, the world’s largest-diameter tunnel-boring machine has moved less than two blocks away from the disassembly pit in Seattle. TBM “Bertha,” churning a 1.7- mile-long tunnel for a state Route 99 replacement of the Alaskan Way Viaduct, required a stop less than 1,000 ft from the pit to confirm that the 57.5-ft-dia machine was 6 in. off course alignment.
Exxon Mobil will build or expand 11 projects along the U.S. Gulf Coast in a $20-billion, 10-year program, Darren Woods, Exxon Mobil Corp.’s chairman and CEO, told the annual CERAWeek energy conference in Houston earlier this month.
The busiest ferry terminal for vehicles in Washington State will go brand-new as plans move forward on designing and building a new terminal one-third of a mile from the current 60-year-old Mukilteo ferry terminal near Everett.
As the federal FAST Act tolling program moves forward, Oregon believes it can pounce on an open window to enter into an early phase of the program and bring tolling to Oregon as a way to upgrade interstates in the Portland area.
Even as crews work to solve engineering quandaries associated with building the Hanford Waste Treatment and Immobilization Plant project in southeast Washington at the Dept. of Energy’s Hanford Nuclear Waste Site, work continues on tearing out the old facilities.
To get just over a quarter of a mile from the finish of the 1.7-mile-long bored tunnel under downtown Seattle, Bertha had to dig under another State Route 99 tunnel.
With several large, grid-scale battery-storage facilities opening in quick succession in Southern California, pundits say the state has taken a leading role in developing infrastructure to hold renewable power generated during low-demand periods, using it to supply customers during peak hours.
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