IRR Route 46 over Big Sandy Creek
PoorPosted for loadHill County, Montana · 11 KM Nnw of Box Elder · Structure no. 0000C59205B0922
- Built
- 1963
- 62 years old
- Condition
- Poor
- inspected October 2024
- Type
- Channel Beam
- Concrete
- Length
- 25 ft
- 1 main span
- Daily traffic
- 100
- 2024 count
- Owner
- Federal
- Bureau of Indian Affairs
About this bridge
IRR Route 46 over Big Sandy Creek is a concrete channel beam carrying IRR Route 46 over Big Sandy Creek in Hill County, Montana. It was built in 1963, so it is 62 years old, older than the Montana average of 47 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 2 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.
It carries about 100 vehicles a day, roughly 15% of them trucks, projected to reach 118 by 2044. The structure is 25 ft (7.7 m) long and 26 ft wide. If it were closed, the detour would be 16.2 mi (26 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 2 Critical | Advanced deterioration of primary structural elements. Bridge may be closed until corrective action is taken. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was IRR Route 46 over Big Sandy Creek built?
It was built in 1963, making it 62 years old in 2025.
What condition is IRR Route 46 over Big Sandy Creek in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in October 2024.
How much traffic does IRR Route 46 over Big Sandy Creek carry?
About 100 vehicles per day (2024 count), of which roughly 15% are trucks.
How long is IRR Route 46 over Big Sandy Creek?
The structure is 25 ft (7.7 m) long with a longest span of 24 ft (7.4 m) and a deck 26 ft wide.
Who owns IRR Route 46 over Big Sandy Creek?
It is owned by the Bureau of Indian Affairs.