SR 18 over SR 516
GoodKing County, Washington · 7.2 E JCT SR 164 · Structure no. 0011439B0000000
- Built
- 1979
- 46 years old
- Condition
- Good
- inspected March 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 260 ft
- 3 main spans
- Daily traffic
- 15,002
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
SR 18 over SR 516 is a prestressed concrete continuous box beam or girders - multiple carrying SR 18 over SR 516 in King County, Washington. It was built in 1979, so it is 46 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 15,002 vehicles a day, roughly 14% of them trucks, projected to reach 21,561 by 2039. The structure is 260 ft (79.2 m) long and 45 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 18 over SR 516 built?
It was built in 1979, making it 46 years old in 2025.
What condition is SR 18 over SR 516 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 March 2024.
How much traffic does SR 18 over SR 516 carry?
About 15,002 vehicles per day (2023 count), of which roughly 14% are trucks.
How long is SR 18 over SR 516?
The structure is 260 ft (79.2 m) long with a longest span of 129 ft (39.2 m) and a deck 45 ft wide.
Who owns SR 18 over SR 516?
It is owned by the State Highway Agency.