No transformation has proven quite as dramatic as in Seattle where the two pits—one at the south end of the project and the other at the north end, near the Space Needle—will require full transformations to serve the needs of the double-decker tunnel roadway.
When Seattle looked to rebuild its 100-year-old Elliott Bay seawall in the downtown, planners knew it had to be stronger and better, but it didn’t necessarily have to be taller.
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.
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.
With the moniker of world’s longest floating bridge hovering around nearly every word written and spoken about the new State Route 520 bridge in Seattle, bridge owner Washington State Dept of Transportation has grown accustomed to the superlatives used when describing its now 1-year-old construction project.
After more than 50 years of maintenance of a 22-mile stretch of Interstate 5 south of Seattle, Washington State Dept. of Transportation officials say the time has come for a full rehabilitation.
