SH 81 over H Canal
FairCassia County, Idaho · 1.3 E. Declo · Structure no. 000000000016611
- Built
- 2006
- 19 years old
- Condition
- Fair
- inspected March 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 52 ft
- 1 main span
- Daily traffic
- 1,500
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
SH 81 over H Canal is a prestressed concrete box beam or girders - multiple carrying SH 81 over H Canal in Cassia County, Idaho. It was built in 2006, so it is 19 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 1,500 vehicles a day, roughly 24% of them trucks, projected to reach 2,250 by 2042. The structure is 52 ft (15.8 m) long and 44 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SH 81 over H Canal built?
It was built in 2006, making it 19 years old in 2025.
What condition is SH 81 over H 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 SH 81 over H Canal carry?
About 1,500 vehicles per day (2023 count), of which roughly 24% are trucks.
How long is SH 81 over H Canal?
The structure is 52 ft (15.8 m) long with a longest span of 48 ft (14.6 m) and a deck 44 ft wide.
Who owns SH 81 over H Canal?
It is owned by the State Highway Agency.