IRR - S 451 over Pass Creek
FairBig Horn County, Montana · 4M S Wyola · Structure no. S00451034+00441
- Built
- 1949
- 76 years old
- Condition
- Fair
- inspected September 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 65 ft
- 4 main spans
- Daily traffic
- 299
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
IRR - S 451 over Pass Creek is a steel continuous stringer/multi-beam or girder carrying IRR - S 451 over Pass Creek in Big Horn County, Montana. It was built in 1949, so it is 76 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 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 299 vehicles a day, roughly 3% of them trucks, projected to reach 314 by 2043. The structure is 65 ft (19.8 m) long and 34 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
| 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 IRR - S 451 over Pass Creek built?
It was built in 1949, making it 76 years old in 2025.
What condition is IRR - S 451 over Pass 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 IRR - S 451 over Pass Creek carry?
About 299 vehicles per day (2023 count), of which roughly 3% are trucks.
How long is IRR - S 451 over Pass Creek?
The structure is 65 ft (19.8 m) long with a longest span of 26 ft (7.9 m) and a deck 34 ft wide.
Who owns IRR - S 451 over Pass Creek?
It is owned by the State Highway Agency.