3:49 PM: We’ve been checking again this week with SDOT regarding the status of the high-bridge repair work. They’re still awaiting two more pours of specialized structural concrete and are working on that schedule, we were told in multiple inquiries this week. Today’s weekly update shows what they’ve been doing in the meantime:
We continued working on post-tensioning anchorage forms [above] in the West Seattle Bridge’s south girder. These anchorages contain lots of steel reinforcement and must be assembled with sleeves or openings. These sleeves allow for utility lines and new post-tensioning strands to pass through them. All of these components must be placed together correctly so that when the new post-tensioning strands are stressed to more than a million pounds, the bridge and all of its existing systems compress and strengthen the bridge as intended.
During the structural concrete pours, we are completing a review of the post-tensioning work completed so far, which includes the rebar we’ve installed, the holes we’ve drilled for the post-tensioning system, and the performance of the concrete.
As we complete this review, we’re making real-time adjustments to our work so we’re confident that the post-tensioning elements and the future post-tensioning system will ensure a safe and long-lasting repair.
SDOT has said repeatedly that they won’t be able to estimate the reopening date until those two remaining concrete pours are done. They’ve also said they expect to be able to provide the date with one month’s advance notice.
P.S. Reminder – the eastbound Spokane Street Viaduct continuation of the bridge east of Highway 99 is scheduled to close for expansion-joint and pothole work from late tonight through early Monday.
8:25 PM: Councilmember Lisa Herbold writes in her weekly newsletter, circulated tonight, that she’s been told the two structural-concrete pours are expected next week, and that “SDOT expects to make a time-frame announcement on June 9th.”