NE 12 ST over I-405
GoodKing County, Washington · 3.0 N JCT I-90 · Structure no. 0017726A0000000
- Built
- 2011
- 14 years old
- Condition
- Good
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 374 ft
- 2 main spans
- Daily traffic
- 20,700
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
NE 12 ST over I-405 is a prestressed concrete continuous stringer/multi-beam or girder carrying NE 12 ST over I-405 in King County, Washington. It was built in 2011, so it is 14 years old, younger 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 20,700 vehicles a day, roughly 6% of them trucks, projected to reach 26,289 by 2036. The structure is 374 ft (114 m) long and 95 ft wide.
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 | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was NE 12 ST over I-405 built?
It was built in 2011, making it 14 years old in 2025.
What condition is NE 12 ST over I-405 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 August 2024.
How much traffic does NE 12 ST over I-405 carry?
About 20,700 vehicles per day (2009 count), of which roughly 6% are trucks.
How long is NE 12 ST over I-405?
The structure is 374 ft (114 m) long with a longest span of 188 ft (57.3 m) and a deck 95 ft wide.
Who owns NE 12 ST over I-405?
It is owned by the State Highway Agency.