US Bridges

E-N Ramp over I-90 Highlands DR

Fair

King County, Washington · 2.1 E JCT SR 900 · Structure no. 0016010D0000000

Built
2003
22 years old
Condition
Fair
inspected June 2023
Type
Box Beam or Girders - Single or Spread
Steel Continuous
Length
925 ft
4 main spans
Daily traffic
8,604
2023 count
Owner
State
State Highway Agency

About this bridge

E-N Ramp over I-90 Highlands DR is a steel continuous box beam or girders - single or spread carrying E-N Ramp over I-90 Highlands DR in King County, Washington. It was built in 2003, so it is 22 years old, younger 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 8,604 vehicles a day, roughly 4% of them trucks, projected to reach 16,911 by 2039. The structure is 925 ft (281.9 m) long and 41 ft wide.

Location

Open in Google Maps
CarriesE-N Ramp
CrossesI-90 Highlands DR
Location2.1 E JCT SR 900
RouteInterstate 90
CountyKing County
StateWashington
Coordinates47.53149, -122.02515
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 evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating86 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 25 or greater
Structure length925 ft (281.9 m)
Longest span233 ft (71 m)
Deck width41 ft (12.6 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,604 (2023)
Projected traffic16,911 by 2039
Trucks4%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$18 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was E-N Ramp over I-90 Highlands DR built?

It was built in 2003, making it 22 years old in 2025.

What condition is E-N Ramp over I-90 Highlands DR 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 E-N Ramp over I-90 Highlands DR carry?

About 8,604 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is E-N Ramp over I-90 Highlands DR?

The structure is 925 ft (281.9 m) long with a longest span of 233 ft (71 m) and a deck 41 ft wide.

Who owns E-N Ramp over I-90 Highlands DR?

It is owned by the State Highway Agency.