US Bridges

I-90 over Spokane Bridge RD

Fair

Spokane County, Washington · 9.6 E JCT SR 27 · Structure no. 0009215A0000000

Built
1972
53 years old
Condition
Fair
inspected May 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
112 ft
1 main span
Daily traffic
30,620
2023 count
Owner
State
State Highway Agency

About this bridge

I-90 over Spokane Bridge RD is a prestressed concrete box beam or girders - multiple carrying I-90 over Spokane Bridge RD in Spokane County, Washington. It was built in 1972, so it is 53 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 30,620 vehicles a day, roughly 10% of them trucks, projected to reach 39,284 by 2039. The structure is 112 ft (34.1 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-90
CrossesSpokane Bridge RD
Location9.6 E JCT SR 27
RouteInterstate 90
CountySpokane County
StateWashington
Coordinates47.69569, -117.04837
Functional classUrban 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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating99 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length112 ft (34.1 m)
Longest span110 ft (33.5 m)
Deck width41 ft (12.6 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30,620 (2023)
Projected traffic39,284 by 2039
Trucks10%
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$2.1 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-90 over Spokane Bridge RD built?

It was built in 1972, making it 53 years old in 2025.

What condition is I-90 over Spokane Bridge RD 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 May 2023.

How much traffic does I-90 over Spokane Bridge RD carry?

About 30,620 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is I-90 over Spokane Bridge RD?

The structure is 112 ft (34.1 m) long with a longest span of 110 ft (33.5 m) and a deck 41 ft wide.

Who owns I-90 over Spokane Bridge RD?

It is owned by the State Highway Agency.