HWY 81 Bypass over J Canal
FairCassia County, Idaho · 0.3N 2.6E DECLO;1000E-50S · Structure no. 000000000024060
- Built
- 1986
- 39 years old
- Condition
- Fair
- inspected March 2024
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 40 ft
- 1 main span
- Daily traffic
- 40
- 2023 count
- Owner
- Local
- Other Local Agency
About this bridge
HWY 81 Bypass over J Canal is a prestressed concrete tee beam carrying HWY 81 Bypass over J Canal in Cassia County, Idaho. It was built in 1986, so it is 39 years old, younger 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 40 vehicles a day, roughly 10% of them trucks, projected to reach 60 by 2039. The structure is 40 ft (12.2 m) long and 30 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 | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was HWY 81 Bypass over J Canal built?
It was built in 1986, making it 39 years old in 2025.
What condition is HWY 81 Bypass over J 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 March 2024.
How much traffic does HWY 81 Bypass over J Canal carry?
About 40 vehicles per day (2023 count), of which roughly 10% are trucks.
How long is HWY 81 Bypass over J Canal?
The structure is 40 ft (12.2 m) long with a longest span of 39 ft (11.9 m) and a deck 30 ft wide.
Who owns HWY 81 Bypass over J Canal?
It is owned by the Other Local Agency.