US 91 over I 15 Nb-Sb;virginia Ic
FairBannock County, Idaho · 5.5 N. Downey · Structure no. 000000000017485
- Built
- 1971
- 54 years old
- Condition
- Fair
- inspected July 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 390 ft
- 4 main spans
- Daily traffic
- 1,500
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 91 over I 15 Nb-Sb;virginia Ic is a steel continuous stringer/multi-beam or girder carrying US 91 over I 15 Nb-Sb;virginia Ic in Bannock County, Idaho. It was built in 1971, so it is 54 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 1,500 vehicles a day, roughly 23% of them trucks, projected to reach 2,250 by 2042. The structure is 390 ft (118.9 m) long and 47 ft wide.
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. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 91 over I 15 Nb-Sb;virginia Ic built?
It was built in 1971, making it 54 years old in 2025.
What condition is US 91 over I 15 Nb-Sb;virginia Ic 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 July 2023.
How much traffic does US 91 over I 15 Nb-Sb;virginia Ic carry?
About 1,500 vehicles per day (2023 count), of which roughly 23% are trucks.
How long is US 91 over I 15 Nb-Sb;virginia Ic?
The structure is 390 ft (118.9 m) long with a longest span of 134 ft (40.8 m) and a deck 47 ft wide.
Who owns US 91 over I 15 Nb-Sb;virginia Ic?
It is owned by the State Highway Agency.