SR 520 E-N Ramp over Northup Way
GoodKing County, Washington · JCT I-405 · Structure no. 0014039D0000000
- Built
- 1993
- 32 years old
- Condition
- Good
- inspected October 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 162 ft
- 3 main spans
- Daily traffic
- 8,411
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
SR 520 E-N Ramp over Northup Way is a prestressed concrete continuous stringer/multi-beam or girder carrying SR 520 E-N Ramp over Northup Way 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 162 ft (49.4 m) long and 29 ft wide. If it were closed, the detour would be 3.1 mi (5 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 | 8 Very Good | No problems noted. |
| 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 SR 520 E-N Ramp over Northup Way built?
It was built in 1993, making it 32 years old in 2025.
What condition is SR 520 E-N Ramp over Northup Way 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 October 2024.
How much traffic does SR 520 E-N Ramp over Northup Way carry?
About 8,411 vehicles per day (2023 count), of which roughly 5% are trucks.
How long is SR 520 E-N Ramp over Northup Way?
The structure is 162 ft (49.4 m) long with a longest span of 64 ft (19.5 m) and a deck 29 ft wide.
Who owns SR 520 E-N Ramp over Northup Way?
It is owned by the State Highway Agency.