SR 18 over W Valley Hwy(old SR 181)
GoodKing County, Washington · 2.3 E JCT I-5 · Structure no. 0005433B0000000
- Built
- 1957
- 68 years old
- Condition
- Good
- inspected July 2023
- Type
- Slab
- Concrete Continuous
- Length
- 114 ft
- 3 main spans
- Daily traffic
- 52,049
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
SR 18 over W Valley Hwy(old SR 181) is a concrete continuous slab carrying SR 18 over W Valley Hwy(old SR 181) in King County, Washington. It was built in 1957, so it is 68 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 52,049 vehicles a day, roughly 11% of them trucks, projected to reach 75,167 by 2039. The structure is 114 ft (34.7 m) long and 73 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 W Valley Hwy(old SR 181) built?
It was built in 1957, making it 68 years old in 2025.
What condition is SR 18 over W Valley Hwy(old SR 181) 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 SR 18 over W Valley Hwy(old SR 181) carry?
About 52,049 vehicles per day (2023 count), of which roughly 11% are trucks.
How long is SR 18 over W Valley Hwy(old SR 181)?
The structure is 114 ft (34.7 m) long with a longest span of 46 ft (14 m) and a deck 73 ft wide.
Who owns SR 18 over W Valley Hwy(old SR 181)?
It is owned by the State Highway Agency.