I 15 Nbl over I15B;UPRR;S.BLACKFOOT Ic
PoorBingham County, Idaho · 3.8 S. Blackfoot · Structure no. 000000000011445
- Built
- 1961
- 64 years old
- Condition
- Poor
- inspected June 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 392 ft
- 5 main spans
- Daily traffic
- 13,750
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I 15 Nbl over I15B;UPRR;S.BLACKFOOT Ic is a prestressed concrete stringer/multi-beam or girder carrying I 15 Nbl over I15B;UPRR;S.BLACKFOOT Ic in Bingham County, Idaho. It was built in 1961, so it is 64 years old, older than the Idaho average of 45.3 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 13,750 vehicles a day, roughly 17% of them trucks, projected to reach 20,625 by 2042. The structure is 392 ft (119.5 m) long and 35 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I 15 Nbl over I15B;UPRR;S.BLACKFOOT Ic built?
It was built in 1961, making it 64 years old in 2025.
What condition is I 15 Nbl over I15B;UPRR;S.BLACKFOOT Ic in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in June 2024.
How much traffic does I 15 Nbl over I15B;UPRR;S.BLACKFOOT Ic carry?
About 13,750 vehicles per day (2023 count), of which roughly 17% are trucks.
How long is I 15 Nbl over I15B;UPRR;S.BLACKFOOT Ic?
The structure is 392 ft (119.5 m) long with a longest span of 78 ft (23.8 m) and a deck 35 ft wide.
Who owns I 15 Nbl over I15B;UPRR;S.BLACKFOOT Ic?
It is owned by the State Highway Agency.