Crews planning for phase 2 rehab of West Seattle High-Rise Bridge

Seattle DOT plans to bring a contractor on board during the design phase

February 10, 2021 / 1 minute read
Crews planning for phase 2 rehab of West Seattle High-Rise Bridge
Image: Seattle DOT

The Seattle DOT (SDOT) recently announced that crews are hard at work designing the full rehabilitation work (phase 2) for the West Seattle High-Rise Bridge, after completing the phase 1 stabilization effort.

In December 2020, SDOT completed the stabilization measures for the bridge and lowered all work platforms. For the next phase of rehabilitation, the goal is to reach the preliminary design milestone this month.

SDOT said that while the agency has designed the stabilization measures to perform well at all temperatures, crews need to observe how the now-stabilized high bridge responds to seasonal temperature changes, particularly changes from colder to warmer weather. The intelligent monitoring system installed in May 2020 is helping to do this. The system is a combination of movement sensors, crack monitors, and cameras that allow us to see inside the bridge and help to provide real-time data to our teams.  

The agency is also beginning the process of selecting a contractor who can help to take bridge rehabilitation across the finish line. SDOT plans to bring the contractor on during the bridge design phase, aiming to get a contractor on board by summer.

Although still in the process of designing the full rehabilitation, the team is using several standard construction methods in its efforts to ready the high bridge for traffic to return in 2022. Crews used epoxy crack filling, carbon-fiber wrapping, and post-tensioning to stop the progress of the cracking and stabilize the bridge in phase 1. Full bridge rehabilitation will likely continue this work and could include more post-tensioning and carbon-fiber wrapping—methods that phase 1 has shown can help strengthen the bridge and reduce further cracking. 

More updates on the West Seattle High-Rise Bridge can be found on SDOT's blog.

-----------

SOURCE: Seattle DOT

Related Articles

The Brent Spence Bridge is a double-decker, cantilevered truss that carries Interstates 71 and 75 across the Ohio River. In the early morning of Nov…
December 02, 2021
I-74 Mississippi River Bridge project in Quad Cities
Image: Lunda Construction / Iowa & Illinois DOT
A ribbon-cutting ceremony was held this week to celebrate opening the new I-74 Mississippi River Bridge to traffic in the Quad Cities between Iowa…
December 02, 2021
Rocheport Bridge
Image: Missouri DOT
The Missouri Department of Transportation (MoDOT) this week launched bridge construction on the new I-70 Missouri River bridges project near…
October 15, 2021
Rhode Island DOT breaks ground on Washington Bridge North project
Image: Rhode Island DOT
The Rhode Island Department of Transportation (RIDOT) this week broke ground on the $78 million Washington Bridge North project. The goal of the…
October 13, 2021
expand_less