US Bridges

W-N I-90 Ramp over Pedestrian-Bike Path

Good

King County, Washington · 0.6 E JCT I-5 · Structure no. 0013190B0000000

Built
1988
37 years old
Condition
Good
inspected June 2023
Type
Slab
Concrete
Length
30 ft
1 main span
Daily traffic
7,337
2012 count
Owner
State
State Highway Agency

About this bridge

W-N I-90 Ramp over Pedestrian-Bike Path is a concrete slab carrying W-N I-90 Ramp over Pedestrian-Bike Path in King County, Washington. It was built in 1988, so it is 37 years old, younger than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 7,337 vehicles a day, roughly 5% of them trucks, projected to reach 12,267 by 2036. The structure is 30 ft (9.1 m) long and 29 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesW-N I-90 Ramp
CrossesPedestrian-Bike Path
Location0.6 E JCT I-5
RouteInterstate 90
CountyKing County
StateWashington
Coordinates47.59097, -122.30722
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating59 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length30 ft (9.1 m)
Longest span30 ft (9.1 m)
Deck width29 ft (8.8 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,337 (2012)
Projected traffic12,267 by 2036
Trucks5%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesPedestrian / bicycle
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$399,000 (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was W-N I-90 Ramp over Pedestrian-Bike Path built?

It was built in 1988, making it 37 years old in 2025.

What condition is W-N I-90 Ramp over Pedestrian-Bike Path in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2023.

How much traffic does W-N I-90 Ramp over Pedestrian-Bike Path carry?

About 7,337 vehicles per day (2012 count), of which roughly 5% are trucks.

How long is W-N I-90 Ramp over Pedestrian-Bike Path?

The structure is 30 ft (9.1 m) long with a longest span of 30 ft (9.1 m) and a deck 29 ft wide.

Who owns W-N I-90 Ramp over Pedestrian-Bike Path?

It is owned by the State Highway Agency.