I-5 over Quilceda Creek
GoodSnohomish County, Washington · 0.9 N JCT SR 528 · Structure no. 0004352A0000000
- Built
- 1953
- 72 years old, rebuilt 1971
- Condition
- Good
- inspected June 2023
- Type
- Slab
- Concrete Continuous
- Length
- 112 ft
- 5 main spans
- Daily traffic
- 68,535
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I-5 over Quilceda Creek is a concrete continuous slab carrying I-5 over Quilceda Creek in Snohomish County, Washington. It was built in 1953 and reconstructed in 1971, so it is 72 years old, older than the Washington average of 49.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 68,535 vehicles a day, roughly 8% of them trucks, projected to reach 105,381 by 2039. The structure is 112 ft (34.1 m) long and 54 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I-5 over Quilceda Creek built?
It was built in 1953, making it 72 years old in 2025. It was reconstructed in 1971.
What condition is I-5 over Quilceda Creek in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2023.
How much traffic does I-5 over Quilceda Creek carry?
About 68,535 vehicles per day (2023 count), of which roughly 8% are trucks.
How long is I-5 over Quilceda Creek?
The structure is 112 ft (34.1 m) long with a longest span of 24 ft (7.3 m) and a deck 54 ft wide.
Who owns I-5 over Quilceda Creek?
It is owned by the State Highway Agency.