US 89 over Greenfields Main Canal
GoodTeton County, Montana · 1M SE Fairfield · Structure no. P00003022+01001
- Built
- 1983
- 42 years old
- Condition
- Good
- inspected November 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 96 ft
- 1 main span
- Daily traffic
- 1,798
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 89 over Greenfields Main Canal is a prestressed concrete stringer/multi-beam or girder carrying US 89 over Greenfields Main Canal in Teton County, Montana. It was built in 1983, so it is 42 years old, younger than the Montana average of 47 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 1,798 vehicles a day, roughly 3% of them trucks, projected to reach 1,888 by 2043. The structure is 96 ft (29.3 m) long and 46 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 | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 89 over Greenfields Main Canal built?
It was built in 1983, making it 42 years old in 2025.
What condition is US 89 over Greenfields Main 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 November 2023.
How much traffic does US 89 over Greenfields Main Canal carry?
About 1,798 vehicles per day (2023 count), of which roughly 3% are trucks.
How long is US 89 over Greenfields Main Canal?
The structure is 96 ft (29.3 m) long with a longest span of 95 ft (29 m) and a deck 46 ft wide.
Who owns US 89 over Greenfields Main Canal?
It is owned by the State Highway Agency.