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I-5 - 93rd Ave SW and Koontz Rd Bridges - Special Repair


March 2017

  • We awarded this contract to Stellar J Corporation, on Nov. 22, 2016.
  • Construction is scheduled to begin late Feb. 2017.
  • Get the latest travel information by visiting our travel advisory webpage.

The Washington State Department of Transportation is repairing Koontz Road bridge over Interstate 5, near Napavine. Built in 1958, the Koontz Road bridge is a two lane bridge crossing I-5, at milepost 69.4.

On Dec. 8, 2015, a semi hauling an unpermitted over height load on southbound I-5 struck the bridge, damaging two of the concrete bridge girders. 

The bridges girders are what provides the support and structure for the roadway surface spanning over I-5.

Why is WSDOT replacing two of the four concrete girders supporting the Koontz Road bridge deck? 

Following the strike, WSDOT bridge inspectors determined the damage was too severe to allow traffic to safely cross Koontz Road, and subsequently closed the structure.

Additionally, due to the severity of the damage to the girders, they cannot be repaired and must be replaced.

This closure remains in effect until repairs are completed in late spring 2017.

The End Result
Once construction is complete, the Koontz Road overpass will be fully functional and will meet the current bridge standards for safety.

Project Benefits
Safety - When construction work is complete, the safety, strength, capacity and stability of the bridge will be restored to it's previous safety levels. 

Mobility - The east/west connection along Koontz Road, across I-5, will be restored to it's previous functionality.

What is the project timeline?

  • Late February 2017 - construction scheduled to begin
  • Mid-spring 2017 - construction scheduled for completion  
  • May 2017 - construction scheduled to begin on 93rd Ave SW in Thurston County

Since much of this work will be done over southbound I-5, for the safety of the traveling public, during construction, crews will need to close the southbound lanes of I-5, near Napavine.

When full-lane closure are in place, drivers should watch for a signed detour.

One of the best ways drivers can stay informed about construction impacts is by visiting our travel advisory webpage.

Financial Information

Financial Data for PIN 300504H, 400516R
Funding Source Amount ($ in thousands)
2003 Gas Tax (Nickel Funding) $0
2005 Gas Tax (TPA) $0
Pre-Existing Funds (PEF) $2,921
CWA $0
Total $2,921

Project signage will reflect the cost of construction engineering, project bid award and sales tax.

Final repair costs are still being determined, but the amount is expected to be between $2 to $3 million.

WSDOT will pursue reimbursement from the freight hauler whose driver damaged the overpass.

How can I get more information?
J. Dewayne Matlock
WSDOT Project Engineer


Celeste Dimichina
WSDOT communications

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