While the State Route 520 floating bridge connecting Seattle to points east over Lake Washington may have opened in spring 2016, it didn’t mark the full completion of the project off the water.
As we move closer to the 2019 milestone of opening the new State Route 99 tunnel under downtown Seattle, officials can start making plans for removal of the aging Alaskan Way Viaduct, the entire reason the new 1.7-mile tunnel was conceived originally.
It took three mobile cranes, including one of the largest mobile cranes in the country, working in a choreographed effort to successfully lower the new Tukwila Urban Center Pedestrian/Bicycle Bridge across the Green River in July.
Bertha, the tunnel-boring machine that recently completed a 9,270-ft tunneling journey underneath downtown Seattle has reached the halfway point of another milestone: disassembly.
All the new Oregon transportation bill needs now is a signature from Gov. Kate Brown, an expected event after the $5.3 billion, 10-year package passed both the Oregon House and Oregon Senate.
It really doesn’t come at a great surprise that the second waste tunnel associated with the Plutonium Uranium Extraction Plant (PUREX) at the Dept. of Energy’s Hanford Nuclear Waste Site in southeast Washington is at risk of collapse.
For anyone wanting to get a peak under the shield of Bertha, the 57.5-ft-diameter tunnel-boring machine that dug a 1.7-mile tunnel under downtown Seattle, now is the time.
The completion of the first of two 300-ton nuclear waste melters at Hanford’s Vit Plant has contractor Bechtel National Inc. looking forward to continued progress on what is arguably the nation’s most complex construction project.
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This is such an exciting development for Portland!...
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