Harrison ST over SR 99 Tunnel Void Space
GoodKing County, Washington · 6.1 N JCT SR 509 · Structure no. 0017999B0000000
- Built
- 2018
- 7 years old
- Condition
- Good
- inspected September 2024
- Type
- Stringer/Multi-beam or Girder
- Concrete
- Length
- 123 ft
- 1 main span
- Daily traffic
- —
- 2018 count
- Owner
- State
- State Highway Agency
About this bridge
Harrison ST over SR 99 Tunnel Void Space is a concrete stringer/multi-beam or girder carrying Harrison ST over SR 99 Tunnel Void Space in King County, Washington. It was built in 2018, so it is 7 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.
No traffic count is recorded. The structure is 123 ft (37.5 m) long and 44 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 Harrison ST over SR 99 Tunnel Void Space built?
It was built in 2018, making it 7 years old in 2025.
What condition is Harrison ST over SR 99 Tunnel Void Space 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 Harrison ST over SR 99 Tunnel Void Space carry?
No traffic count is recorded for this structure.
How long is Harrison ST over SR 99 Tunnel Void Space?
The structure is 123 ft (37.5 m) long with a longest span of 121 ft (36.9 m) and a deck 44 ft wide.
Who owns Harrison ST over SR 99 Tunnel Void Space?
It is owned by the State Highway Agency.