Work to repair the S. 178th street overpass over I-5 between Tukwila and SeaTac has finished ahead of schedule. Traffic is once again open to two lanes of alternating traffic.
The bridge was damaged on December 13, 2006, when a truck exceeding the height limit on I-5 struck the S. 178th street overpass. The impact damaged a girder underneath the structure. Bridge inspectors found the bridge safe for drivers but decided to restrict traffic to prevent more damage to the girder.
- The overpass structure is re-enforced by a total of 24 girders.|
- More than 100 feet of the 322 foot overpass was damaged.
- The overpass has 4 bridge spans.
Replacing the girder ensures that the overpass remains safe for drivers on S. 178th and on I-5 in the future.
Completing repairs returns the overpass to normal capacity for drivers traveling between SeaTac and Tukwila.
| Protects Environment
During construction we ensured that our contractor takes all necessary steps to protect the environment and to comply with environmental permits.
Partnerships & Cooperation
WSDOT worked with residents from the SeaTac and Tukwila communities as construction proceeded.
The responsible parties are being billed for the repair costs.
How can I get more information?
Project Engineer: Mike Askarian
WSDOT Communications: Patrick Conrad
15700 Dayton Avenue North
PO Box 330310, MS: 103
Seattle, WA 98133
Phone: (206) 440-4473
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