S 12th RD over Huntley Main Canal 156
FairYellowstone County, Montana · 6M NE Huntley · Structure no. L56053011+01001
- Built
- 1976
- 49 years old, rebuilt 1993
- Condition
- Fair
- inspected December 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 41 ft
- 1 main span
- Daily traffic
- 9
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
S 12th RD over Huntley Main Canal 156 is a steel stringer/multi-beam or girder carrying S 12th RD over Huntley Main Canal 156 in Yellowstone County, Montana. It was built in 1976 and reconstructed in 1993, so it is 49 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 9 vehicles a day, roughly 3% of them trucks, projected to reach 9 by 2043. The structure is 41 ft (12.5 m) long and 24 ft wide. If it were closed, the detour would be 123.7 mi (199 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was S 12th RD over Huntley Main Canal 156 built?
It was built in 1976, making it 49 years old in 2025. It was reconstructed in 1993.
What condition is S 12th RD over Huntley Main Canal 156 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 December 2024.
How much traffic does S 12th RD over Huntley Main Canal 156 carry?
About 9 vehicles per day (2023 count), of which roughly 3% are trucks.
How long is S 12th RD over Huntley Main Canal 156?
The structure is 41 ft (12.5 m) long with a longest span of 39 ft (11.9 m) and a deck 24 ft wide.
Who owns S 12th RD over Huntley Main Canal 156?
It is owned by the County Highway Agency.