IRR - S 448 over Big Sandy Creek
FairHill County, Montana · 2M W Box Elder · Structure no. S00448002+01001
- Built
- 1961
- 64 years old
- Condition
- Fair
- inspected November 2023
- Type
- Stringer/Multi-beam or Girder
- Wood or Timber
- Length
- 75 ft
- 3 main spans
- Daily traffic
- 96
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
IRR - S 448 over Big Sandy Creek is a wood or timber stringer/multi-beam or girder carrying IRR - S 448 over Big Sandy Creek in Hill County, Montana. It was built in 1961, so it is 64 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 96 vehicles a day, roughly 6% of them trucks, projected to reach 101 by 2043. The structure is 75 ft (22.9 m) long and 26 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 448 over Big Sandy Creek built?
It was built in 1961, making it 64 years old in 2025.
What condition is IRR - S 448 over Big Sandy 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 November 2023.
How much traffic does IRR - S 448 over Big Sandy Creek carry?
About 96 vehicles per day (2023 count), of which roughly 6% are trucks.
How long is IRR - S 448 over Big Sandy Creek?
The structure is 75 ft (22.9 m) long with a longest span of 25 ft (7.6 m) and a deck 26 ft wide.
Who owns IRR - S 448 over Big Sandy Creek?
It is owned by the State Highway Agency.