SR 524 over I-5
FairSnohomish County, Washington · 1.6 E JCT SR 99 · Structure no. 0007134B0000000
- Built
- 1964
- 61 years old
- Condition
- Fair
- inspected October 2024
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 491 ft
- 5 main spans
- Daily traffic
- 35,106
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
SR 524 over I-5 is a concrete continuous box beam or girders - multiple carrying SR 524 over I-5 in Snohomish County, Washington. It was built in 1964, so it is 61 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 35,106 vehicles a day, roughly 3% of them trucks, projected to reach 59,317 by 2039. The structure is 491 ft (149.7 m) long and 75 ft wide. If it were closed, the detour would be 3.1 mi (5 km).
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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SR 524 over I-5 built?
It was built in 1964, making it 61 years old in 2025.
What condition is SR 524 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 October 2024.
How much traffic does SR 524 over I-5 carry?
About 35,106 vehicles per day (2023 count), of which roughly 3% are trucks.
How long is SR 524 over I-5?
The structure is 491 ft (149.7 m) long with a longest span of 113 ft (34.4 m) and a deck 75 ft wide.
Who owns SR 524 over I-5?
It is owned by the State Highway Agency.