Old HWY No. 9 over Prairie Creek
FairThurston County, Washington · 0.8 M NW Old HWY 99 · Structure no. 081714000000000
- Built
- 1936
- 89 years old
- Condition
- Fair
- inspected June 2023
- Type
- Frame
- Concrete Continuous
- Length
- 43 ft
- 2 main spans
- Daily traffic
- 3,433
- 2021 count
- Owner
- County
- County Highway Agency
About this bridge
Old HWY No. 9 over Prairie Creek is a concrete continuous frame carrying Old HWY No. 9 over Prairie Creek in Thurston County, Washington. It was built in 1936, so it is 89 years old, older than the Washington average of 49.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 3,433 vehicles a day, roughly 15% of them trucks, projected to reach 5,307 by 2043. The structure is 43 ft (13.1 m) long and 27 ft wide. If it were closed, the detour would be 1.9 mi (3 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Old HWY No. 9 over Prairie Creek built?
It was built in 1936, making it 89 years old in 2025.
What condition is Old HWY No. 9 over Prairie Creek in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in June 2023.
How much traffic does Old HWY No. 9 over Prairie Creek carry?
About 3,433 vehicles per day (2021 count), of which roughly 15% are trucks.
How long is Old HWY No. 9 over Prairie Creek?
The structure is 43 ft (13.1 m) long with a longest span of 21 ft (6.4 m) and a deck 27 ft wide.
Who owns Old HWY No. 9 over Prairie Creek?
It is owned by the County Highway Agency.