I-405 over 228th ST
GoodSnohomish County, Washington · 1.3 N King CO · Structure no. 0008375C0000000
- Built
- 1968
- 57 years old, rebuilt 1998
- Condition
- Good
- inspected April 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 287 ft
- 3 main spans
- Daily traffic
- 46,512
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I-405 over 228th ST is a prestressed concrete continuous stringer/multi-beam or girder carrying I-405 over 228th ST in Snohomish County, Washington. It was built in 1968 and reconstructed in 1998, so it is 57 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 46,512 vehicles a day, roughly 5% of them trucks, projected to reach 71,315 by 2039. The structure is 287 ft (87.5 m) long and 59 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. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I-405 over 228th ST built?
It was built in 1968, making it 57 years old in 2025. It was reconstructed in 1998.
What condition is I-405 over 228th ST 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 April 2023.
How much traffic does I-405 over 228th ST carry?
About 46,512 vehicles per day (2023 count), of which roughly 5% are trucks.
How long is I-405 over 228th ST?
The structure is 287 ft (87.5 m) long with a longest span of 104 ft (31.7 m) and a deck 59 ft wide.
Who owns I-405 over 228th ST?
It is owned by the State Highway Agency.