From SDOT today, an update on West Seattle Bridge work:
Last week, crews completed the hydro-blasting work. This created access points for the work platforms to hang from and openings in the bridge deck to access the inside of the bridge.
We’ve also been working to attach rigging that will hold the work platforms in place underneath the bridge. These components consist of 10- to 14-foot-long metal cables that are being fed through the holes in the bridge deck. Next, we’ll install stairs and scaffolding inside the bridge.
In the coming weeks, we’ll begin core drilling on the inside of the bridge at Pier 16, where we’ll install post-tensioning cables to reinforce the strength of the bridge’s concrete. We’ll also be relocating utility lines at this location to make room for the additional post-tensioning cables.
We’re continuing to build the work platforms, which we expect to will hoist up to the underside of the bridge in January. These platforms create a workspace to complete epoxy injections and carbon-fiber wrapping on the outside of the bridge.
Heads up that there may be limited weekend traffic impacts on SW Manning St and E Klickitat Ave while we raise the work platform on the east side of the bridge – stay tuned for more details about timing in future updates.
Here’s an SDOT graphic showing where those platforms will go up:
The contractor’s project manager provided an in-depth briefing of the work plan at this month’s Community Task Force meeting (WSB coverage here).