SR99 Off Ramp over Detention Vault
GoodKing County, Washington · 5.4 N JCT SR 509 · Structure no. 0018549B0000000
- Built
- 2017
- 8 years old
- Condition
- Good
- inspected September 2024
- Type
- Culvert
- Concrete
- Length
- 58 ft
- 1 main span
- Daily traffic
- 1,000
- 2019 count
- Owner
- State
- State Highway Agency
About this bridge
SR99 Off Ramp over Detention Vault is a concrete culvert carrying SR99 Off Ramp over Detention Vault in King County, Washington. It was built in 2017, so it is 8 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 1,000 vehicles a day, roughly 5% of them trucks, projected to reach 1,486 by 2039. The structure is 58 ft (17.7 m) long. 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 |
|---|---|---|
| Culvert | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SR99 Off Ramp over Detention Vault built?
It was built in 2017, making it 8 years old in 2025.
What condition is SR99 Off Ramp over Detention Vault 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 September 2024.
How much traffic does SR99 Off Ramp over Detention Vault carry?
About 1,000 vehicles per day (2019 count), of which roughly 5% are trucks.
How long is SR99 Off Ramp over Detention Vault?
The structure is 58 ft (17.7 m) long with a longest span of 54 ft (16.5 m).
Who owns SR99 Off Ramp over Detention Vault?
It is owned by the State Highway Agency.