US 91 over Gibson Lateral Canal
PoorBingham County, Idaho · 5.7 N. Fort Hall · Structure no. 000000000017520
- Built
- 1923
- 102 years old, rebuilt 1949
- Condition
- Poor
- inspected April 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 28 ft
- 1 main span
- Daily traffic
- 3,800
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 91 over Gibson Lateral Canal is a steel stringer/multi-beam or girder carrying US 91 over Gibson Lateral Canal in Bingham County, Idaho. It was built in 1923 and reconstructed in 1949, so it is 102 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 3,800 vehicles a day, roughly 11% of them trucks, projected to reach 5,700 by 2042. The structure is 28 ft (8.5 m) long and 34 ft wide. If it were closed, the detour would be 1.9 mi (3 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 | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 91 over Gibson Lateral Canal built?
It was built in 1923, making it 102 years old in 2025. It was reconstructed in 1949.
What condition is US 91 over Gibson Lateral Canal 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 April 2024.
How much traffic does US 91 over Gibson Lateral Canal carry?
About 3,800 vehicles per day (2023 count), of which roughly 11% are trucks.
How long is US 91 over Gibson Lateral Canal?
The structure is 28 ft (8.5 m) long with a longest span of 27 ft (8.2 m) and a deck 34 ft wide.
Who owns US 91 over Gibson Lateral Canal?
It is owned by the State Highway Agency.