I-405 over North Creek
GoodKing County, Washington · 0.6 N JCT SR 522 · Structure no. 0008375B0000000
- Built
- 1968
- 57 years old, rebuilt 1998
- Condition
- Good
- inspected September 2024
- Type
- Slab
- Concrete Continuous
- Length
- 114 ft
- 3 main spans
- Daily traffic
- 55,889
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I-405 over North Creek is a concrete continuous slab carrying I-405 over North Creek in King 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 55,889 vehicles a day, roughly 5% of them trucks, projected to reach 82,132 by 2039. The structure is 114 ft (34.7 m) long and 148 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-405 over North Creek built?
It was built in 1968, making it 57 years old in 2025. It was reconstructed in 1998.
What condition is I-405 over North 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 September 2024.
How much traffic does I-405 over North Creek carry?
About 55,889 vehicles per day (2023 count), of which roughly 5% are trucks.
How long is I-405 over North Creek?
The structure is 114 ft (34.7 m) long with a longest span of 41 ft (12.6 m) and a deck 148 ft wide.
Who owns I-405 over North Creek?
It is owned by the State Highway Agency.