US Bridges

I-90 Wcd Ramp over Ramps Rail City Street

Fair

King County, Washington · JCT I-5 & I-90 · Structure no. 0007565L0000000

Built
1965
60 years old, rebuilt 1989
Condition
Fair
inspected June 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
865 ft
10 main spans
Daily traffic
35,848
2023 count
Owner
State
State Highway Agency

About this bridge

I-90 Wcd Ramp over Ramps Rail City Street is a concrete continuous box beam or girders - multiple carrying I-90 Wcd Ramp over Ramps Rail City Street in King County, Washington. It was built in 1965 and reconstructed in 1989, so it is 60 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 35,848 vehicles a day, roughly 5% of them trucks, projected to reach 62,277 by 2043. The structure is 865 ft (263.7 m) long and 29 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesI-90 Wcd Ramp
CrossesRamps Rail City Street
LocationJCT I-5 & I-90
RouteInterstate 5
CountyKing County
StateWashington
Coordinates47.59483, -122.31744
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJune 2023
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 geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating28.5 US tons
Inventory rating22.2 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans10
Design loadHS 20 + Mod
Structure length865 ft (263.7 m)
Longest span120 ft (36.6 m)
Deck width29 ft (8.8 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35,848 (2023)
Projected traffic62,277 by 2043
Trucks5%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 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$11.5 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-90 Wcd Ramp over Ramps Rail City Street built?

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 1989.

What condition is I-90 Wcd Ramp over Ramps Rail City Street 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 2023.

How much traffic does I-90 Wcd Ramp over Ramps Rail City Street carry?

About 35,848 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is I-90 Wcd Ramp over Ramps Rail City Street?

The structure is 865 ft (263.7 m) long with a longest span of 120 ft (36.6 m) and a deck 29 ft wide.

Who owns I-90 Wcd Ramp over Ramps Rail City Street?

It is owned by the State Highway Agency.