Skip Top Navigation

SR 520 Bridge Replacement and HOV Project - Damage & Repairs

    
SR 520 bridge just prior to closing due to extremely high winds and waves during the February 2006 storm.

SR 520 bridge during February 2006 storm.



SR 520 bridge during February 2006 storm.

SR 520 bridge drawspan open during February 2006 storm.  The three holes seen underneath the center roadway once had three large drawspan hooks -- which were torn off during the storm.

   
Drawspan alignment hook, torn off during February 2006 storm.

SR 520 bridge drawspan alignment hook torn off during February 2006 storm.

Post-tensioning cable strengthens floating pontoons against earthquake damage. Here is photo of post-tensioning running through the inside of a pontoon. Post-tensioning cable, housed in orange piping, runs through each pontoon beneath the floating bridge.
Post-tensioning cable strengthens floating pontoons against earthquake damage. Here is photo of post-tensioning running through the inside of a pontoon.


Bridge crew routinely make repairs to cracks inside the floating pontoons. Here is a repaired crack. Four rows of orange pipe house post-tensioning cable.


Repaired crack inside a floating pontoon. The crack looks like a spider and is about 5 feet by 3 feet wide.
An up-close view of a repaired crack inside a floating pontoon.   


SR 520 bridge during February 2006 storm.

SR 520 bridge drawspan open to relieve wave pressure during February 2006 windstorm.


  
SR 520 bridge closed for storm repairs during February 2006 storm.

SR 520 bridge closed for storm repairs during February 2006 storm.


A view of the I-90 Lacey V. Murrow floating bridge's mid-sections sinking in 1990.

A view of the I-90 Lacey V. Murrow floating bridge's mid-sections sinking in 1990.

  
A winter storm pounds the SR 520 Bridge, driving waves over the roadway.

A winter storm pounds the SR 520 Bridge, driving waves over the roadway.

  
A severe winter storm wreaks havoc on the old Hood Canal Bridge.

A severe winter storm wreaks havoc on the old Hood Canal Bridge.

  
The inside of a hollow bridge support column that was damaged by a barge in 1999.

The inside of a hollow bridge support column that was damaged by a barge in 1999.

   
WSDOT crews repair a damaged support column after a barge crash in July 1999.

WSDOT crews repair a damaged support column after a barge crash in July 1999.

  
A torn cable joint found during a routine inspection.  The cables connect the floating bridge pontoons with their underwater lakebed anchors.

A torn cable joint found during a routine inspection.  The cables connect the floating bridge pontoons with their underwater lakebed anchors.


Return to main gallery