US Bridges

I 90 Wbl over Spokane River

Fair

Spokane County, Washington · At Idaho Wash.State Line · Structure no. 002005200000000

Built
1976
49 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
465 ft
5 main spans
Daily traffic
30,500
2019 count
Owner
State
State Highway Agency

About this bridge

I 90 Wbl over Spokane River is a prestressed concrete continuous stringer/multi-beam or girder carrying I 90 Wbl over Spokane River in Spokane County, Washington. It was built in 1976, so it is 49 years old, younger 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 30,500 vehicles a day, roughly 8% of them trucks, projected to reach 40,500 by 2035. The structure is 465 ft (141.7 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI 90 Wbl
CrossesSpokane River
LocationAt Idaho Wash.State Line
RouteInterstate 90
CountySpokane County
StateWashington
Coordinates47.69694, -117.04194
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67 US tons
Inventory rating32 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length465 ft (141.7 m)
Longest span92 ft (28 m)
Deck width44 ft (13.4 m)
Roadway width41 ft (12.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30,500 (2019)
Projected traffic40,500 by 2035
Trucks8%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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 statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$8.8 million (2022 estimate)
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was I 90 Wbl over Spokane River built?

It was built in 1976, making it 49 years old in 2025.

What condition is I 90 Wbl over Spokane River 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 April 2023.

How much traffic does I 90 Wbl over Spokane River carry?

About 30,500 vehicles per day (2019 count), of which roughly 8% are trucks.

How long is I 90 Wbl over Spokane River?

The structure is 465 ft (141.7 m) long with a longest span of 92 ft (28 m) and a deck 44 ft wide.

Who owns I 90 Wbl over Spokane River?

It is owned by the State Highway Agency.