E-N Ramp SR 520 over I-405 & SR 520
GoodKing County, Washington · JCT I-405 · Structure no. 0014039C0000000
- Built
- 1993
- 32 years old
- Condition
- Good
- inspected September 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 1,112 ft
- 7 main spans
- Daily traffic
- 8,411
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
E-N Ramp SR 520 over I-405 & SR 520 is a steel continuous stringer/multi-beam or girder carrying E-N Ramp SR 520 over I-405 & SR 520 in King County, Washington. It was built in 1993, so it is 32 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 8,411 vehicles a day, roughly 5% of them trucks, projected to reach 13,219 by 2039. The structure is 1,112 ft (338.9 m) long and 34 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 | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was E-N Ramp SR 520 over I-405 & SR 520 built?
It was built in 1993, making it 32 years old in 2025.
What condition is E-N Ramp SR 520 over I-405 & SR 520 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 E-N Ramp SR 520 over I-405 & SR 520 carry?
About 8,411 vehicles per day (2023 count), of which roughly 5% are trucks.
How long is E-N Ramp SR 520 over I-405 & SR 520?
The structure is 1,112 ft (338.9 m) long with a longest span of 185 ft (56.4 m) and a deck 34 ft wide.
Who owns E-N Ramp SR 520 over I-405 & SR 520?
It is owned by the State Highway Agency.