US Bridges

Oak Street over Okanogan River

Good

Okanogan County, Washington · 0.09 SW SR 215 · Structure no. 087084000000000

Built
2003
22 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Concrete Continuous
Length
340 ft
3 main spans
Daily traffic
4,100
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

Oak Street over Okanogan River is a concrete continuous stringer/multi-beam or girder carrying Oak Street over Okanogan River in Okanogan County, Washington. It was built in 2003, so it is 22 years old, younger than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 4,100 vehicles a day, roughly 8% of them trucks, projected to reach 5,000 by 2041. The structure is 340 ft (103.6 m) long and 47 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesOak Street
CrossesOkanogan River
Location0.09 SW SR 215
RouteCity Street 915
Coordinates48.36331, -119.57786
Functional classUrban Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating89 US tons
Inventory rating59.3 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length340 ft (103.6 m)
Longest span130 ft (39.6 m)
Deck width47 ft (14.3 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,100 (2021)
Projected traffic5,000 by 2041
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedDeck rehabilitation with only incidental widening
Estimated improvement cost$6.1 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Oak Street over Okanogan River built?

It was built in 2003, making it 22 years old in 2025.

What condition is Oak Street over Okanogan River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2023.

How much traffic does Oak Street over Okanogan River carry?

About 4,100 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is Oak Street over Okanogan River?

The structure is 340 ft (103.6 m) long with a longest span of 130 ft (39.6 m) and a deck 47 ft wide.

Who owns Oak Street over Okanogan River?

It is owned by the City or Municipal Highway Agency.