US Bridges

I-90 E-S Ramp over I-5/AIRPORT Way Ramp

Good

King County, Washington · JCT I-5 · Structure no. 000000OC0000000

Built
1965
60 years old, rebuilt 1991
Condition
Good
inspected April 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
640 ft
2 main spans
Daily traffic
9,815
2012 count
Owner
State
State Highway Agency

About this bridge

I-90 E-S Ramp over I-5/AIRPORT Way Ramp is a prestressed concrete continuous box beam or girders - single or spread carrying I-90 E-S Ramp over I-5/AIRPORT Way Ramp in King County, Washington. It was built in 1965 and reconstructed in 1991, 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 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 9,815 vehicles a day, roughly 5% of them trucks, projected to reach 16,411 by 2036. The structure is 640 ft (195.1 m) long and 28 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesI-90 E-S Ramp
CrossesI-5/AIRPORT Way Ramp
LocationJCT I-5
RouteInterstate 90
CountyKing County
StateWashington
Coordinates47.59256, -122.32417
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 inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating46 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2 (+5 approach)
Design loadHS 20 + Mod
Structure length640 ft (195.1 m)
Longest span156 ft (47.5 m)
Deck width28 ft (8.4 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,815 (2012)
Projected traffic16,411 by 2036
Trucks5%
Lanes on structure1
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed1.9 mi (3 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$7.6 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-90 E-S Ramp over I-5/AIRPORT Way Ramp built?

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 1991.

What condition is I-90 E-S Ramp over I-5/AIRPORT Way Ramp 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 April 2023.

How much traffic does I-90 E-S Ramp over I-5/AIRPORT Way Ramp carry?

About 9,815 vehicles per day (2012 count), of which roughly 5% are trucks.

How long is I-90 E-S Ramp over I-5/AIRPORT Way Ramp?

The structure is 640 ft (195.1 m) long with a longest span of 156 ft (47.5 m) and a deck 28 ft wide.

Who owns I-90 E-S Ramp over I-5/AIRPORT Way Ramp?

It is owned by the State Highway Agency.