SH 81 over G Canal
GoodCassia County, Idaho · In Declo · Structure no. 000000000016621
- Built
- 2013
- 12 years old
- Condition
- Good
- inspected March 2023
- Type
- Frame
- Concrete
- Length
- 23 ft
- 1 main span
- Daily traffic
- 3,400
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
SH 81 over G Canal is a concrete frame carrying SH 81 over G Canal in Cassia County, Idaho. It was built in 2013, so it is 12 years old, younger 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 3,400 vehicles a day, roughly 16% of them trucks, projected to reach 5,100 by 2042. The structure is 23 ft (7 m) long and 56 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 9 Excellent | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SH 81 over G Canal built?
It was built in 2013, making it 12 years old in 2025.
What condition is SH 81 over G 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 2023.
How much traffic does SH 81 over G Canal carry?
About 3,400 vehicles per day (2023 count), of which roughly 16% are trucks.
How long is SH 81 over G Canal?
The structure is 23 ft (7 m) long with a longest span of 23 ft (7 m) and a deck 56 ft wide.
Who owns SH 81 over G Canal?
It is owned by the State Highway Agency.