US Bridges

I-5 Exp Ramp over I-5 NB I-5 Express Ramp

Good

King County, Washington · 6.2 N JCT I-90 · Structure no. 0006911C0000000

Built
1962
63 years old
Condition
Good
inspected May 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
424 ft
4 main spans
Daily traffic
4,447
2023 count
Owner
State
State Highway Agency

About this bridge

I-5 Exp Ramp over I-5 NB I-5 Express Ramp is a concrete continuous box beam or girders - multiple carrying I-5 Exp Ramp over I-5 NB I-5 Express Ramp in King County, Washington. It was built in 1962, so it is 63 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 4,447 vehicles a day, roughly 4% of them trucks, projected to reach 9,711 by 2039. The structure is 424 ft (129.1 m) long and 27 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-5 Exp Ramp
CrossesI-5 NB I-5 Express Ramp
Location6.2 N JCT I-90
RouteInterstate 5
CountyKing County
StateWashington
Coordinates47.68053, -122.32094
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 inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65 US tons
Inventory rating38 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length424 ft (129.1 m)
Longest span115 ft (35.1 m)
Deck width27 ft (8.1 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,447 (2023)
Projected traffic9,711 by 2039
Trucks4%
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$5.4 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-5 Exp Ramp over I-5 NB I-5 Express Ramp built?

It was built in 1962, making it 63 years old in 2025.

What condition is I-5 Exp Ramp over I-5 NB I-5 Express 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 May 2023.

How much traffic does I-5 Exp Ramp over I-5 NB I-5 Express Ramp carry?

About 4,447 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is I-5 Exp Ramp over I-5 NB I-5 Express Ramp?

The structure is 424 ft (129.1 m) long with a longest span of 115 ft (35.1 m) and a deck 27 ft wide.

Who owns I-5 Exp Ramp over I-5 NB I-5 Express Ramp?

It is owned by the State Highway Agency.