US Bridges

I-90 WB on Ramp over 224th Ave NW & Trail

Fair

King County, Washington · 1.0 E JCT SR 900 · Structure no. 0008573G0000000

Built
1971
54 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
372 ft
5 main spans
Daily traffic
13,798
2023 count
Owner
State
State Highway Agency

About this bridge

I-90 WB on Ramp over 224th Ave NW & Trail is a prestressed concrete continuous stringer/multi-beam or girder carrying I-90 WB on Ramp over 224th Ave NW & Trail in King County, Washington. It was built in 1971, so it is 54 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 13,798 vehicles a day, roughly 5% of them trucks, projected to reach 20,465 by 2039. The structure is 372 ft (113.4 m) long and 26 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-90 WB on Ramp
Crosses224th Ave NW & Trail
Location1.0 E JCT SR 900
RouteInterstate 90
CountyKing County
StateWashington
Coordinates47.54317, -122.04089
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
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating19.3 US tons
Inventory rating15 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20 + Mod
Structure length372 ft (113.4 m)
Longest span78 ft (23.8 m)
Deck width26 ft (7.8 m)
Roadway width23 ft (7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,798 (2023)
Projected traffic20,465 by 2039
Trucks5%
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$5.8 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-90 WB on Ramp over 224th Ave NW & Trail built?

It was built in 1971, making it 54 years old in 2025.

What condition is I-90 WB on Ramp over 224th Ave NW & Trail 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 WB on Ramp over 224th Ave NW & Trail carry?

About 13,798 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is I-90 WB on Ramp over 224th Ave NW & Trail?

The structure is 372 ft (113.4 m) long with a longest span of 78 ft (23.8 m) and a deck 26 ft wide.

Who owns I-90 WB on Ramp over 224th Ave NW & Trail?

It is owned by the State Highway Agency.