81st S/County Line over Great Western Canal
GoodBonneville County, Idaho · 4.5 S. 6.4 W. Idaho Falls · Structure no. 000000000031035
- Built
- 1963
- 62 years old
- Condition
- Good
- inspected March 2024
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 37 ft
- 1 main span
- Daily traffic
- 80
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
81st S/County Line over Great Western Canal is a prestressed concrete tee beam carrying 81st S/County Line over Great Western Canal in Bonneville County, Idaho. It was built in 1963, so it is 62 years old, older than the Idaho average of 45.3 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 80 vehicles a day, roughly 13% of them trucks, projected to reach 120 by 2039. The structure is 37 ft (11.3 m) long and 28 ft wide. If it were closed, the detour would be 1.9 mi (3 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 81st S/County Line over Great Western Canal built?
It was built in 1963, making it 62 years old in 2025.
What condition is 81st S/County Line over Great Western Canal in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2024.
How much traffic does 81st S/County Line over Great Western Canal carry?
About 80 vehicles per day (2023 count), of which roughly 13% are trucks.
How long is 81st S/County Line over Great Western Canal?
The structure is 37 ft (11.3 m) long with a longest span of 36 ft (11 m) and a deck 28 ft wide.
Who owns 81st S/County Line over Great Western Canal?
It is owned by the County Highway Agency.