US Bridges

E-N Ramp over I-5

Fair

King County, Washington · 5.5 N JCT SR 900 · Structure no. 0007741J0000000

Built
1966
59 years old
Condition
Fair
inspected July 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
287 ft
3 main spans
Daily traffic
22,370
2012 count
Owner
State
State Highway Agency

About this bridge

E-N Ramp over I-5 is a concrete continuous box beam or girders - multiple carrying E-N Ramp over I-5 in King County, Washington. It was built in 1966, so it is 59 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 22,370 vehicles a day, roughly 5% of them trucks, projected to reach 37,403 by 2036. The structure is 287 ft (87.6 m) long and 26 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesE-N Ramp
CrossesI-5
Location5.5 N JCT SR 900
RouteInterstate 5
Coordinates47.57178, -122.32031
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 inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42.9 US tons
Inventory rating32.8 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length287 ft (87.6 m)
Longest span108 ft (32.8 m)
Deck width26 ft (7.8 m)
Roadway width21 ft (6.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,370 (2012)
Projected traffic37,403 by 2036
Trucks5%
Lanes on structure1
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$3.5 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was E-N Ramp over I-5 built?

It was built in 1966, making it 59 years old in 2025.

What condition is E-N Ramp over I-5 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 July 2024.

How much traffic does E-N Ramp over I-5 carry?

About 22,370 vehicles per day (2012 count), of which roughly 5% are trucks.

How long is E-N Ramp over I-5?

The structure is 287 ft (87.6 m) long with a longest span of 108 ft (32.8 m) and a deck 26 ft wide.

Who owns E-N Ramp over I-5?

It is owned by the State Highway Agency.