US Bridges

I-90 over Columbia River Vantage

Fair

Kittitas County, Washington · 26.4 E JCT I-82 · Structure no. 0006533A0000000

Built
1962
63 years old
Condition
Fair
inspected June 2024
Type
Arch - Thru
Steel Continuous
Length
2,504 ft
3 main spans
Daily traffic
9,077
2023 count
Owner
State
State Highway Agency

About this bridge

I-90 over Columbia River Vantage is a steel continuous arch - thru carrying I-90 over Columbia River Vantage in Kittitas County, Washington. It was built in 1962, so it is 63 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 5 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 9,077 vehicles a day, roughly 28% of them trucks, projected to reach 11,022 by 2039. The structure is 2,504 ft (763.2 m) long and 63 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesI-90
CrossesColumbia River Vantage
Location26.4 E JCT I-82
RouteInterstate 90
CountyKittitas County
StateWashington
Coordinates46.942, -119.97369
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating20 US tons
Inventory rating15.3 US tons

Structure

Structure typeArch - Thru
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+6 approach)
Design loadHS 20
Structure length2,504 ft (763.2 m)
Longest span520 ft (158.5 m)
Deck width63 ft (19.1 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deck17 ft (5.1 m)

Traffic and service

Average daily traffic9,077 (2023)
Projected traffic11,022 by 2039
Trucks28%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 statusPossibly eligible for the National Register; requires further investigation
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$88 million (2022 estimate)
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was I-90 over Columbia River Vantage built?

It was built in 1962, making it 63 years old in 2025.

What condition is I-90 over Columbia River Vantage 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 June 2024.

How much traffic does I-90 over Columbia River Vantage carry?

About 9,077 vehicles per day (2023 count), of which roughly 28% are trucks.

How long is I-90 over Columbia River Vantage?

The structure is 2,504 ft (763.2 m) long with a longest span of 520 ft (158.5 m) and a deck 63 ft wide.

Who owns I-90 over Columbia River Vantage?

It is owned by the State Highway Agency.