81st S/County Line over Lower Holmes Canal
FairBonneville County, Idaho · 4.5 S. 6.2 W. Idaho Falls · Structure no. 000000000031045
- Built
- 1965
- 60 years old
- Condition
- Fair
- inspected April 2024
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 32 ft
- 1 main span
- Daily traffic
- 80
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
81st S/County Line over Lower Holmes Canal is a prestressed concrete tee beam carrying 81st S/County Line over Lower Holmes Canal in Bonneville County, Idaho. It was built in 1965, so it is 60 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 80 vehicles a day, roughly 13% of them trucks, projected to reach 120 by 2039. The structure is 32 ft (9.8 m) long and 32 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 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 81st S/County Line over Lower Holmes Canal built?
It was built in 1965, making it 60 years old in 2025.
What condition is 81st S/County Line over Lower Holmes Canal 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 April 2024.
How much traffic does 81st S/County Line over Lower Holmes Canal carry?
About 80 vehicles per day (2023 count), of which roughly 13% are trucks.
How long is 81st S/County Line over Lower Holmes Canal?
The structure is 32 ft (9.8 m) long with a longest span of 30 ft (9.1 m) and a deck 32 ft wide.
Who owns 81st S/County Line over Lower Holmes Canal?
It is owned by the County Highway Agency.