US Bridges

I-90 over Road O NE

Good

Grant County, Washington · 3.4 E JCT SR 17 · Structure no. 0007621B0000000

Built
1965
60 years old
Condition
Good
inspected September 2021
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
131 ft
3 main spans
Daily traffic
6,317
2023 count
Owner
State
State Highway Agency

About this bridge

I-90 over Road O NE is a prestressed concrete stringer/multi-beam or girder carrying I-90 over Road O NE in Grant County, Washington. It was built in 1965, so it is 60 years old, older 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 6,317 vehicles a day, roughly 23% of them trucks, projected to reach 7,986 by 2039. The structure is 131 ft (39.9 m) long and 40 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-90
CrossesRoad O NE
Location3.4 E JCT SR 17
RouteInterstate 90
CountyGrant County
StateWashington
Coordinates47.09261, -119.17261
Functional classRural Principal Arterial - Interstate

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.
Last inspectionSeptember 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating45 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length131 ft (39.9 m)
Longest span44 ft (13.4 m)
Deck width40 ft (12.2 m)
Roadway width36 ft (11.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,317 (2023)
Projected traffic7,986 by 2039
Trucks23%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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$2.5 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-90 over Road O NE built?

It was built in 1965, making it 60 years old in 2025.

What condition is I-90 over Road O NE 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 September 2021.

How much traffic does I-90 over Road O NE carry?

About 6,317 vehicles per day (2023 count), of which roughly 23% are trucks.

How long is I-90 over Road O NE?

The structure is 131 ft (39.9 m) long with a longest span of 44 ft (13.4 m) and a deck 40 ft wide.

Who owns I-90 over Road O NE?

It is owned by the State Highway Agency.