US 12 over Hay Creek
FairFallon County, Montana · 9M W Plevna · Structure no. P00002061+05811
- Built
- 1932
- 93 years old, rebuilt 1958
- Condition
- Fair
- inspected September 2024
- Type
- Stringer/Multi-beam or Girder
- Wood or Timber
- Length
- 58 ft
- 3 main spans
- Daily traffic
- 516
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 12 over Hay Creek is a wood or timber stringer/multi-beam or girder carrying US 12 over Hay Creek in Fallon County, Montana. It was built in 1932 and reconstructed in 1958, so it is 93 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 516 vehicles a day, roughly 12% of them trucks, projected to reach 542 by 2043. The structure is 58 ft (17.8 m) long and 40 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 | 7 Good | Some minor problems. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 US 12 over Hay Creek built?
It was built in 1932, making it 93 years old in 2025. It was reconstructed in 1958.
What condition is US 12 over Hay Creek 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 September 2024.
How much traffic does US 12 over Hay Creek carry?
About 516 vehicles per day (2023 count), of which roughly 12% are trucks.
How long is US 12 over Hay Creek?
The structure is 58 ft (17.8 m) long with a longest span of 19 ft (5.8 m) and a deck 40 ft wide.
Who owns US 12 over Hay Creek?
It is owned by the State Highway Agency.