SR 520 over 108th Ave NE
GoodKing County, Washington · 5.2 E JCT SR 513 · Structure no. 0007839B0000000
- Built
- 1966
- 59 years old, rebuilt 2014
- Condition
- Good
- inspected August 2024
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 271 ft
- 3 main spans
- Daily traffic
- 26,760
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
SR 520 over 108th Ave NE is a concrete continuous box beam or girders - multiple carrying SR 520 over 108th Ave NE in King County, Washington. It was built in 1966 and reconstructed in 2014, 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 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 26,760 vehicles a day, roughly 3% of them trucks, projected to reach 48,372 by 2039. The structure is 271 ft (82.6 m) long and 84 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 SR 520 over 108th Ave NE built?
It was built in 1966, making it 59 years old in 2025. It was reconstructed in 2014.
What condition is SR 520 over 108th Ave NE 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 SR 520 over 108th Ave NE carry?
About 26,760 vehicles per day (2023 count), of which roughly 3% are trucks.
How long is SR 520 over 108th Ave NE?
The structure is 271 ft (82.6 m) long with a longest span of 118 ft (36 m) and a deck 84 ft wide.
Who owns SR 520 over 108th Ave NE?
It is owned by the State Highway Agency.