Stc 1757;MAIN ST over Portneuf River
PoorBannock County, Idaho · In Lava Hot Springs · Structure no. 000000000021975
- Built
- 1962
- 63 years old
- Condition
- Poor
- inspected September 2024
- Type
- Stringer/Multi-beam or Girder
- Concrete
- Length
- 43 ft
- 1 main span
- Daily traffic
- 1,200
- 2023 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Stc 1757;MAIN ST over Portneuf River is a concrete stringer/multi-beam or girder carrying Stc 1757;MAIN ST over Portneuf River in Bannock County, Idaho. It was built in 1962, so it is 63 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 2 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 1,200 vehicles a day, roughly 4% of them trucks, projected to reach 1,800 by 2042. The structure is 43 ft (13.1 m) long and 33 ft wide. If it were closed, the detour would be 3.1 mi (5 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 2 Critical | Advanced deterioration of primary structural elements. Bridge may be closed until corrective action is taken. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Stc 1757;MAIN ST over Portneuf River built?
It was built in 1962, making it 63 years old in 2025.
What condition is Stc 1757;MAIN ST over Portneuf River 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 September 2024.
How much traffic does Stc 1757;MAIN ST over Portneuf River carry?
About 1,200 vehicles per day (2023 count), of which roughly 4% are trucks.
How long is Stc 1757;MAIN ST over Portneuf River?
The structure is 43 ft (13.1 m) long with a longest span of 42 ft (12.8 m) and a deck 33 ft wide.
Who owns Stc 1757;MAIN ST over Portneuf River?
It is owned by the City or Municipal Highway Agency.