SH 55 over Payette River
GoodBoise County, Idaho · Horseshoe Bend Scl · Structure no. 000000000014761
- Built
- 2021
- 4 years old
- Condition
- Good
- inspected June 2023
- Type
- Tee Beam
- Concrete
- Length
- 372 ft
- 3 main spans
- Daily traffic
- 8,800
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
SH 55 over Payette River is a concrete tee beam carrying SH 55 over Payette River in Boise County, Idaho. It was built in 2021, so it is 4 years old, younger than the Idaho average of 45.3 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 8,800 vehicles a day, roughly 5% of them trucks, projected to reach 13,200 by 2042. The structure is 372 ft (113.4 m) long and 66 ft wide. If it were closed, the detour would be 49.7 mi (80 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. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SH 55 over Payette River built?
It was built in 2021, making it 4 years old in 2025.
What condition is SH 55 over Payette River 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 June 2023.
How much traffic does SH 55 over Payette River carry?
About 8,800 vehicles per day (2023 count), of which roughly 5% are trucks.
How long is SH 55 over Payette River?
The structure is 372 ft (113.4 m) long with a longest span of 125 ft (38.1 m) and a deck 66 ft wide.
Who owns SH 55 over Payette River?
It is owned by the State Highway Agency.