information from Seattle Department of Transportation

We continued repair work on the high bridge this week with epoxy injection and concrete surface scanning using ground penetrating radar. To ensure that the small cracks in the concrete are completely filled, we use a pump that injects the cracks with the epoxy at very high pressures. The radar scanning allows us to find the best core-drilling locations needed for post-tensioning components, which we’ll install throughout the bridge.  

Scaffolding inside of the West Seattle Bridge. SDOT Photo

We’ve also continued installing scaffolding on the west platforms and inside the bridge. The scaffolding allows us to safely access areas of the high bridge for future work.  

We also worked on the removal and replacement of various expansion joints on the bridge this week. These joints provide space for the bridge to expand and contract with changes in temperature and help prevent damage caused by seismic activity. Replacing bridge expansion joints is a routine element of bridge maintenance. 

In the coming weeks, we’ll continue epoxy injection work and begin carbon-fiber wrapping on the interior and exterior of the bridge. We will also begin preparing forms for the post-tensioning system and continue core-drilling the interior of the bridge.