I-405 over Pedestrian Trail
GoodKing County, Washington · 5.2 N JCT SR 520 · Structure no. 0008615C0000000
- Built
- 1970
- 55 years old, rebuilt 1994
- Condition
- Good
- inspected July 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 243 ft
- 3 main spans
- Daily traffic
- 85,426
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I-405 over Pedestrian Trail is a prestressed concrete continuous stringer/multi-beam or girder carrying I-405 over Pedestrian Trail in King County, Washington. It was built in 1970 and reconstructed in 1994, so it is 55 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 85,426 vehicles a day, roughly 6% of them trucks, projected to reach 129,261 by 2039. The structure is 243 ft (74.1 m) long and 81 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 Pedestrian Trail built?
It was built in 1970, making it 55 years old in 2025. It was reconstructed in 1994.
What condition is I-405 over Pedestrian Trail 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 July 2023.
How much traffic does I-405 over Pedestrian Trail carry?
About 85,426 vehicles per day (2023 count), of which roughly 6% are trucks.
How long is I-405 over Pedestrian Trail?
The structure is 243 ft (74.1 m) long with a longest span of 86 ft (26.2 m) and a deck 81 ft wide.
Who owns I-405 over Pedestrian Trail?
It is owned by the State Highway Agency.