SH 55 over Big Creek
FairValley County, Idaho · 4 S. Cascade · Structure no. 000000000014820
- Built
- 1933
- 92 years old, rebuilt 1955
- Condition
- Fair
- inspected September 2024
- Type
- Tee Beam
- Concrete
- Length
- 53 ft
- 1 main span
- Daily traffic
- 4,100
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
SH 55 over Big Creek is a concrete tee beam carrying SH 55 over Big Creek in Valley County, Idaho. It was built in 1933 and reconstructed in 1955, so it is 92 years old, older than the Idaho average of 45.3 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 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 4,100 vehicles a day, roughly 17% of them trucks, projected to reach 6,150 by 2042. The structure is 53 ft (16.2 m) long and 39 ft wide. If it were closed, the detour would be 14.3 mi (23 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SH 55 over Big Creek built?
It was built in 1933, making it 92 years old in 2025. It was reconstructed in 1955.
What condition is SH 55 over Big 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 September 2024.
How much traffic does SH 55 over Big Creek carry?
About 4,100 vehicles per day (2023 count), of which roughly 17% are trucks.
How long is SH 55 over Big Creek?
The structure is 53 ft (16.2 m) long with a longest span of 51 ft (15.5 m) and a deck 39 ft wide.
Who owns SH 55 over Big Creek?
It is owned by the State Highway Agency.