US 89 over Teton River
FairTeton County, Montana · 1M S Choteau · Structure no. P00003039+05181
- Built
- 1939
- 86 years old, rebuilt 1965
- Condition
- Fair
- inspected July 2023
- Type
- Truss - Thru
- Steel
- Length
- 226 ft
- 1 main span
- Daily traffic
- 1,265
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 89 over Teton River is a steel truss - thru carrying US 89 over Teton River in Teton County, Montana. It was built in 1939 and reconstructed in 1965, so it is 86 years old, older than the Montana average of 47 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 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 1,265 vehicles a day, roughly 5% of them trucks, projected to reach 1,328 by 2043. The structure is 226 ft (69 m) long and 27 ft wide. If it were closed, the detour would be 39.1 mi (63 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 89 over Teton River built?
It was built in 1939, making it 86 years old in 2025. It was reconstructed in 1965.
What condition is US 89 over Teton River 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 July 2023.
How much traffic does US 89 over Teton River carry?
About 1,265 vehicles per day (2023 count), of which roughly 5% are trucks.
How long is US 89 over Teton River?
The structure is 226 ft (69 m) long with a longest span of 90 ft (27.4 m) and a deck 27 ft wide.
Who owns US 89 over Teton River?
It is owned by the State Highway Agency.