US Bridges

I-90 WB Ramp over I-90

Fair

Spokane County, Washington · 5.0 E JCT SR 27 · Structure no. 0005158A0000000

Built
1956
69 years old
Condition
Fair
inspected October 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
308 ft
4 main spans
Daily traffic
1,919
2023 count
Owner
State
State Highway Agency

About this bridge

I-90 WB Ramp over I-90 is a concrete continuous box beam or girders - multiple carrying I-90 WB Ramp over I-90 in Spokane County, Washington. It was built in 1956, so it is 69 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 1,919 vehicles a day, roughly 8% of them trucks, projected to reach 2,320 by 2039. The structure is 308 ft (93.9 m) long and 29 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI-90 WB Ramp
CrossesI-90
Location5.0 E JCT SR 27
RouteInterstate 90
Coordinates47.66588, -117.13222
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 inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating32.2 US tons
Inventory rating25 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 15
Structure length308 ft (93.9 m)
Longest span99 ft (30.2 m)
Deck width29 ft (8.8 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,919 (2023)
Projected traffic2,320 by 2039
Trucks8%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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$4.7 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-90 WB Ramp over I-90 built?

It was built in 1956, making it 69 years old in 2025.

What condition is I-90 WB Ramp over I-90 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 October 2024.

How much traffic does I-90 WB Ramp over I-90 carry?

About 1,919 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is I-90 WB Ramp over I-90?

The structure is 308 ft (93.9 m) long with a longest span of 99 ft (30.2 m) and a deck 29 ft wide.

Who owns I-90 WB Ramp over I-90?

It is owned by the State Highway Agency.