US Bridges

Univ-N Ramp over I-5

Fair

King County, Washington · 1.2 N JCT I-90 · Structure no. 0007409B0000000

Built
1965
60 years old
Condition
Fair
inspected July 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
630 ft
7 main spans
Daily traffic
7,599
2012 count
Owner
State
State Highway Agency

About this bridge

Univ-N Ramp over I-5 is a concrete continuous box beam or girders - multiple carrying Univ-N Ramp over I-5 in King County, Washington. It was built in 1965, 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 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 7,599 vehicles a day, roughly 5% of them trucks, projected to reach 12,706 by 2036. The structure is 630 ft (192.1 m) long and 30 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesUniv-N Ramp
CrossesI-5
Location1.2 N JCT I-90
RouteInterstate 5
CountyKing County
StateWashington
Coordinates47.60953, -122.33167
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 2023
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 rating65 US tons
Inventory rating38 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20
Structure length630 ft (192.1 m)
Longest span146 ft (44.5 m)
Deck width30 ft (9 m)
Roadway width21 ft (6.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,599 (2012)
Projected traffic12,706 by 2036
Trucks5%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
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$9 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

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

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

What condition is Univ-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 2023.

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

About 7,599 vehicles per day (2012 count), of which roughly 5% are trucks.

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

The structure is 630 ft (192.1 m) long with a longest span of 146 ft (44.5 m) and a deck 30 ft wide.

Who owns Univ-N Ramp over I-5?

It is owned by the State Highway Agency.