Symons Road over Portneuf River
GoodBannock County, Idaho · 3.9N. 0.6W.LAVA Hot Sprgs · Structure no. 000000000021925
- Built
- 1986
- 39 years old
- Condition
- Good
- inspected April 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 63 ft
- 1 main span
- Daily traffic
- 30
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
Symons Road over Portneuf River is a prestressed concrete box beam or girders - multiple carrying Symons Road over Portneuf River in Bannock County, Idaho. It was built in 1986, so it is 39 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 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 30 vehicles a day, roughly 50% of them trucks, projected to reach 45 by 2042. The structure is 63 ft (19.2 m) long and 36 ft wide. If it were closed, the detour would be 98.8 mi (159 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 Symons Road over Portneuf River built?
It was built in 1986, making it 39 years old in 2025.
What condition is Symons Road over Portneuf 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 April 2024.
How much traffic does Symons Road over Portneuf River carry?
About 30 vehicles per day (2023 count), of which roughly 50% are trucks.
How long is Symons Road over Portneuf River?
The structure is 63 ft (19.2 m) long with a longest span of 60 ft (18.3 m) and a deck 36 ft wide.
Who owns Symons Road over Portneuf River?
It is owned by the County Highway Agency.