US Bridges

US 97 over Okanogan R & RR

Fair

Okanogan County, Washington · 18.3 N JCT SR 215 · Structure no. 0005371A0000000

Built
1957
68 years old
Condition
Fair
inspected August 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
659 ft
6 main spans
Daily traffic
4,734
2023 count
Owner
State
State Highway Agency

About this bridge

US 97 over Okanogan R & RR is a concrete continuous box beam or girders - multiple carrying US 97 over Okanogan R & RR in Okanogan County, Washington. It was built in 1957, so it is 68 years old, older than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 4,734 vehicles a day, roughly 13% of them trucks, projected to reach 5,688 by 2039. The structure is 659 ft (200.9 m) long and 32 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesUS 97
CrossesOkanogan R & RR
Location18.3 N JCT SR 215
RouteU.S. Route 97
CountyOkanogan County
StateWashington
Coordinates48.64883, -119.47058
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41 US tons
Inventory rating24 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans6 (+3 approach)
Design loadHS 15
Structure length659 ft (200.9 m)
Longest span94 ft (28.7 m)
Deck width32 ft (9.7 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,734 (2023)
Projected traffic5,688 by 2039
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad and waterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$13.8 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US 97 over Okanogan R & RR built?

It was built in 1957, making it 68 years old in 2025.

What condition is US 97 over Okanogan R & RR in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in August 2024.

How much traffic does US 97 over Okanogan R & RR carry?

About 4,734 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is US 97 over Okanogan R & RR?

The structure is 659 ft (200.9 m) long with a longest span of 94 ft (28.7 m) and a deck 32 ft wide.

Who owns US 97 over Okanogan R & RR?

It is owned by the State Highway Agency.