12th Street over Portneuf River
GoodBannock County, Idaho · 0.1 S 0.6 E Mccammon · Structure no. 000000000021951
- Built
- 2005
- 20 years old
- Condition
- Good
- inspected September 2022
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 51 ft
- 1 main span
- Daily traffic
- 108
- 2023 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
12th Street over Portneuf River is a prestressed concrete stringer/multi-beam or girder carrying 12th Street over Portneuf River in Bannock County, Idaho. It was built in 2005, so it is 20 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 108 vehicles a day, roughly 10% of them trucks, projected to reach 162 by 2039. The structure is 51 ft (15.5 m) long and 32 ft wide. If it were closed, the detour would be 3.1 mi (5 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 | 8 Very Good | No problems noted. |
| 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 12th Street over Portneuf River built?
It was built in 2005, making it 20 years old in 2025.
What condition is 12th Street 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 September 2022.
How much traffic does 12th Street over Portneuf River carry?
About 108 vehicles per day (2023 count), of which roughly 10% are trucks.
How long is 12th Street over Portneuf River?
The structure is 51 ft (15.5 m) long with a longest span of 48 ft (14.6 m) and a deck 32 ft wide.
Who owns 12th Street over Portneuf River?
It is owned by the City or Municipal Highway Agency.