SH 39 Nbl over Snake R.;am.Falls Dam Br
GoodPower County, Idaho · 1.1 W. American Falls · Structure no. 000000000014150
- Built
- 1978
- 47 years old
- Condition
- Good
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 260 ft
- 5 main spans
- Daily traffic
- 2,900
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
SH 39 Nbl over Snake R.;am.Falls Dam Br is a steel stringer/multi-beam or girder carrying SH 39 Nbl over Snake R.;am.Falls Dam Br in Power County, Idaho. It was built in 1978, so it is 47 years old, older 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 2,900 vehicles a day, roughly 19% of them trucks, projected to reach 4,350 by 2042. The structure is 260 ft (79.2 m) long and 42 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SH 39 Nbl over Snake R.;am.Falls Dam Br built?
It was built in 1978, making it 47 years old in 2025.
What condition is SH 39 Nbl over Snake R.;am.Falls Dam Br 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 August 2024.
How much traffic does SH 39 Nbl over Snake R.;am.Falls Dam Br carry?
About 2,900 vehicles per day (2023 count), of which roughly 19% are trucks.
How long is SH 39 Nbl over Snake R.;am.Falls Dam Br?
The structure is 260 ft (79.2 m) long with a longest span of 50 ft (15.2 m) and a deck 42 ft wide.
Who owns SH 39 Nbl over Snake R.;am.Falls Dam Br?
It is owned by the State Highway Agency.