So 160th ST over SR 509
GoodKing County, Washington · 5.2 N JCT SR 516 · Structure no. 0008745A0000000
- Built
- 1971
- 54 years old
- Condition
- Good
- inspected July 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 253 ft
- 4 main spans
- Daily traffic
- 11,946
- 2012 count
- Owner
- State
- State Highway Agency
About this bridge
So 160th ST over SR 509 is a prestressed concrete continuous stringer/multi-beam or girder carrying So 160th ST over SR 509 in King County, Washington. It was built in 1971, so it is 54 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 11,946 vehicles a day, roughly 4% of them trucks. The structure is 253 ft (77.1 m) long and 66 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 | 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 So 160th ST over SR 509 built?
It was built in 1971, making it 54 years old in 2025.
What condition is So 160th ST over SR 509 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 July 2023.
How much traffic does So 160th ST over SR 509 carry?
About 11,946 vehicles per day (2012 count), of which roughly 4% are trucks.
How long is So 160th ST over SR 509?
The structure is 253 ft (77.1 m) long with a longest span of 76 ft (23.2 m) and a deck 66 ft wide.
Who owns So 160th ST over SR 509?
It is owned by the State Highway Agency.