N-W Ramp over I-405 E-N S-N Ramps
FairKing County, Washington · 5.2 N JCT SR 516 · Structure no. 0007401H0000000
- Built
- 1966
- 59 years old
- Condition
- Fair
- inspected July 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 215 ft
- 3 main spans
- Daily traffic
- 12,607
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
N-W Ramp over I-405 E-N S-N Ramps is a prestressed concrete stringer/multi-beam or girder carrying N-W Ramp over I-405 E-N S-N Ramps in King County, Washington. It was built in 1966, so it is 59 years old, older than the Washington average of 49.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 12,607 vehicles a day, roughly 6% of them trucks, projected to reach 19,166 by 2039. The structure is 215 ft (65.5 m) long and 25 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 N-W Ramp over I-405 E-N S-N Ramps built?
It was built in 1966, making it 59 years old in 2025.
What condition is N-W Ramp over I-405 E-N S-N Ramps in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in July 2023.
How much traffic does N-W Ramp over I-405 E-N S-N Ramps carry?
About 12,607 vehicles per day (2022 count), of which roughly 6% are trucks.
How long is N-W Ramp over I-405 E-N S-N Ramps?
The structure is 215 ft (65.5 m) long with a longest span of 83 ft (25.3 m) and a deck 25 ft wide.
Who owns N-W Ramp over I-405 E-N S-N Ramps?
It is owned by the State Highway Agency.