US 91 over Tyhee Wasteway Canal
FairBannock County, Idaho · 3.2 N. Chubbuck · Structure no. 000000000017505
- Built
- 1925
- 100 years old, rebuilt 1949
- Condition
- Fair
- inspected April 2023
- Type
- Tee Beam
- Concrete
- Length
- 32 ft
- 1 main span
- Daily traffic
- 4,600
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 91 over Tyhee Wasteway Canal is a concrete tee beam carrying US 91 over Tyhee Wasteway Canal in Bannock County, Idaho. It was built in 1925 and reconstructed in 1949, so it is 100 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 4,600 vehicles a day, roughly 5% of them trucks, projected to reach 6,900 by 2042. The structure is 32 ft (9.8 m) long and 34 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 91 over Tyhee Wasteway Canal built?
It was built in 1925, making it 100 years old in 2025. It was reconstructed in 1949.
What condition is US 91 over Tyhee Wasteway 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 2023.
How much traffic does US 91 over Tyhee Wasteway Canal carry?
About 4,600 vehicles per day (2023 count), of which roughly 5% are trucks.
How long is US 91 over Tyhee Wasteway Canal?
The structure is 32 ft (9.8 m) long with a longest span of 29 ft (8.8 m) and a deck 34 ft wide.
Who owns US 91 over Tyhee Wasteway Canal?
It is owned by the State Highway Agency.