I-90 over I-5
FairKing County, Washington · JCT I-5 · Structure no. 0007565C0000000
- Built
- 1966
- 59 years old, rebuilt 1991
- Condition
- Fair
- inspected June 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 1,685 ft
- 7 main spans
- Daily traffic
- 20,960
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I-90 over I-5 is a prestressed concrete continuous box beam or girders - multiple carrying I-90 over I-5 in King County, Washington. It was built in 1966 and reconstructed in 1991, 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 20,960 vehicles a day, roughly 3% of them trucks, projected to reach 31,713 by 2039. The structure is 1,685 ft (513.6 m) long and 37 ft wide.
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I-90 over I-5 built?
It was built in 1966, making it 59 years old in 2025. It was reconstructed in 1991.
What condition is I-90 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 June 2023.
How much traffic does I-90 over I-5 carry?
About 20,960 vehicles per day (2023 count), of which roughly 3% are trucks.
How long is I-90 over I-5?
The structure is 1,685 ft (513.6 m) long with a longest span of 130 ft (39.6 m) and a deck 37 ft wide.
Who owns I-90 over I-5?
It is owned by the State Highway Agency.