US 97 - Okanogan River Bridge at Omak - Deck Repair

Project news

The project officially began August 1 and 2 with sign installations for the highway closure and the detours for the bridge deck repairs.  The detour and construction work began as the Omak Stampede ended on Aug. 13 and continues 16 days to Aug. 28.

WSDOT held an open house at Omak City Hall on July 16. Here are some of the questions asked and answered:

How will trucks know to follow the detour?  Electronic message boards, advanced warning signs and extensive public outreach including news stories, internet, email, and social media.

If trucks ignore the detour, what will happen?  Enforcement is the best way to achieve compliance if people ignore signing.  The detour will be clearly marked.

Was there any way of keeping the bridge open?  The type of deck work and the bridge width don’t allow for single lane traffic during construction on the bridge deck.

How far back will traffic backup? The WSDOT Traffic Office has projected the backups and will adjust traffic signal timing but expect to be delayed several minutes longer than usual.

What happens if the project runs beyond the 28th? The contractor will be penalized for keeping the bridge closed beyond the 28th.

How will pedestrians be taken care of? The contractor is required to provide a safe route or means of transporting pedestrians from one side of the bridge to the other during the closure.

The attendees acknowledged that the repairs to the bridge were important and the detour would be the best way to divert traffic. They also stated that traffic will be very slow through town and congestion will unavoidable.  They expect long delays and a high number of calls related to the delays.


The deck on the US 97 bridge over the Okanogan River in Omak is deteriorating and in need of rehabilitation to preserve its operational and structural integrity. A $670,000 project to fix the deck began Monday, Aug. 13 and should be completed Tuesday, Aug. 28. 

During construction all US 97 highway traffic is being detoured through Omak around the clock on state routes 215 and 155. The detour for both passenger vehicles and trucks was designed to reduce delays. Our traffic engineers reviewed the detour plan for both types of vehicles, evaluating volume, potential delays, and truck turning requirements resulting in two routes. Both routes utilize SR155 and SR215, and the intersection of these two routes (Omak Ave E & N Main St) to handle all detoured traffic. Vehicles longer than 40 feet need to be detoured on SR 215 and are not being permitted to cross the SR 155 Bridge over the Okanogan River. Vehicles 40 feet and shorter are being detoured across the SR 155 Bridge.

Needs & Benefits

US 97 is a critical freight transportation corridor in and out of Canada and preservation of this bridge is necessary to maintain the route.


Contract #9279 was awarded to Hamilton Construction Co. on June 8, 2018. Construction began August 1 and should be complete by August 28.


This (P-2) Highway Capital Structures Preservation project's construction funding is $670,000 of state and federal dollars. 


Dave Kieninger, Project Engineer (509) 667 2880

Jeff Deal, Project Designer (509) 667 2869 Email: