I-5 over I-405 & Ramps
GoodSnohomish County, Washington · 1.1 N JCT SR 524 · Structure no. 0007134A0000000
- Built
- 1964
- 61 years old, rebuilt 1995
- Condition
- Good
- inspected March 2022
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 274 ft
- 3 main spans
- Daily traffic
- 77,502
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I-5 over I-405 & Ramps is a prestressed concrete stringer/multi-beam or girder carrying I-5 over I-405 & Ramps in Snohomish County, Washington. It was built in 1964 and reconstructed in 1995, 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 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 77,502 vehicles a day, roughly 6% of them trucks, projected to reach 115,140 by 2039. The structure is 274 ft (83.5 m) long and 71 ft wide. If it were closed, the detour would be 8.1 mi (13 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. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I-5 over I-405 & Ramps built?
It was built in 1964, making it 61 years old in 2025. It was reconstructed in 1995.
What condition is I-5 over I-405 & Ramps 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 March 2022.
How much traffic does I-5 over I-405 & Ramps carry?
About 77,502 vehicles per day (2023 count), of which roughly 6% are trucks.
How long is I-5 over I-405 & Ramps?
The structure is 274 ft (83.5 m) long with a longest span of 93 ft (28.3 m) and a deck 71 ft wide.
Who owns I-5 over I-405 & Ramps?
It is owned by the State Highway Agency.