SR 18 over Green River
GoodKing County, Washington · 2.5 E JCT SR 164 · Structure no. 0014354B0000000
- Built
- 1995
- 30 years old
- Condition
- Good
- inspected July 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 406 ft
- 3 main spans
- Daily traffic
- 28,147
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
SR 18 over Green River is a steel continuous stringer/multi-beam or girder carrying SR 18 over Green River in King County, Washington. It was built in 1995, so it is 30 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 28,147 vehicles a day, roughly 11% of them trucks, projected to reach 40,870 by 2039. The structure is 406 ft (123.7 m) long and 41 ft wide. If it were closed, the detour would be 9.9 mi (16 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. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SR 18 over Green River built?
It was built in 1995, making it 30 years old in 2025.
What condition is SR 18 over Green River 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 2024.
How much traffic does SR 18 over Green River carry?
About 28,147 vehicles per day (2023 count), of which roughly 11% are trucks.
How long is SR 18 over Green River?
The structure is 406 ft (123.7 m) long with a longest span of 171 ft (52.1 m) and a deck 41 ft wide.
Who owns SR 18 over Green River?
It is owned by the State Highway Agency.