SR 18 over SR 164
GoodKing County, Washington · 1.3 E JCT SR 167 · Structure no. 0006066A0000000
- Built
- 1959
- 66 years old
- Condition
- Good
- inspected November 2023
- Type
- Slab
- Concrete
- Length
- 82 ft
- 1 main span
- Daily traffic
- 25,441
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
SR 18 over SR 164 is a concrete slab carrying SR 18 over SR 164 in King County, Washington. It was built in 1959, so it is 66 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 25,441 vehicles a day, roughly 11% of them trucks, projected to reach 36,741 by 2039. The structure is 82 ft (25 m) long and 94 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 164 built?
It was built in 1959, making it 66 years old in 2025.
What condition is SR 18 over SR 164 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 November 2023.
How much traffic does SR 18 over SR 164 carry?
About 25,441 vehicles per day (2023 count), of which roughly 11% are trucks.
How long is SR 18 over SR 164?
The structure is 82 ft (25 m) long with a longest span of 79 ft (24.1 m) and a deck 94 ft wide.
Who owns SR 18 over SR 164?
It is owned by the State Highway Agency.