SR 99 Off Ramp over Ramp and Terrain
GoodKing County, Washington · 4.3 N JCT SR 509 · Structure no. 0018921A0000000
- Built
- 2019
- 6 years old
- Condition
- Good
- inspected May 2023
- Type
- Channel Beam
- Concrete Continuous
- Length
- 400 ft
- 3 main spans
- Daily traffic
- 13,058
- 2019 count
- Owner
- State
- State Highway Agency
About this bridge
SR 99 Off Ramp over Ramp and Terrain is a concrete continuous channel beam carrying SR 99 Off Ramp over Ramp and Terrain in King County, Washington. It was built in 2019, so it is 6 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 13,058 vehicles a day, roughly 5% of them trucks, projected to reach 20,000 by 2040. The structure is 400 ft (121.9 m) long and 34 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 | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SR 99 Off Ramp over Ramp and Terrain built?
It was built in 2019, making it 6 years old in 2025.
What condition is SR 99 Off Ramp over Ramp and Terrain 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 May 2023.
How much traffic does SR 99 Off Ramp over Ramp and Terrain carry?
About 13,058 vehicles per day (2019 count), of which roughly 5% are trucks.
How long is SR 99 Off Ramp over Ramp and Terrain?
The structure is 400 ft (121.9 m) long with a longest span of 180 ft (54.9 m) and a deck 34 ft wide.
Who owns SR 99 Off Ramp over Ramp and Terrain?
It is owned by the State Highway Agency.