S 154th ST over SR 518
GoodKing County, Washington · 1.6 E JCT SR 509 · Structure no. 0008745F0000000
- Built
- 1971
- 54 years old
- Condition
- Good
- inspected October 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 556 ft
- 5 main spans
- Daily traffic
- 8,626
- 2016 count
- Owner
- State
- State Highway Agency
About this bridge
S 154th ST over SR 518 is a steel continuous stringer/multi-beam or girder carrying S 154th ST over SR 518 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 8,626 vehicles a day, roughly 2% of them trucks, projected to reach 13,509 by 2038. The structure is 556 ft (169.5 m) long and 40 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 S 154th ST over SR 518 built?
It was built in 1971, making it 54 years old in 2025.
What condition is S 154th ST over SR 518 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 October 2024.
How much traffic does S 154th ST over SR 518 carry?
About 8,626 vehicles per day (2016 count), of which roughly 2% are trucks.
How long is S 154th ST over SR 518?
The structure is 556 ft (169.5 m) long with a longest span of 158 ft (48.2 m) and a deck 40 ft wide.
Who owns S 154th ST over SR 518?
It is owned by the State Highway Agency.