IRR - US 87 over Big Sandy Creek
GoodChouteau County, Montana · 3M N Big Sandy · Structure no. P00010082+09131
- Built
- 1990
- 35 years old
- Condition
- Good
- inspected November 2023
- Type
- Culvert
- Concrete
- Length
- 24 ft
- 2 main spans
- Daily traffic
- 1,694
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
IRR - US 87 over Big Sandy Creek is a concrete culvert carrying IRR - US 87 over Big Sandy Creek in Chouteau County, Montana. It was built in 1990, so it is 35 years old, younger than the Montana average of 47 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 1,694 vehicles a day, roughly 8% of them trucks, projected to reach 1,779 by 2043. The structure is 24 ft (7.3 m) long. If it were closed, the detour would be 123.7 mi (199 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Channel and channel protection | 7 Good | Some minor problems. |
| Culvert | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was IRR - US 87 over Big Sandy Creek built?
It was built in 1990, making it 35 years old in 2025.
What condition is IRR - US 87 over Big Sandy Creek in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2023.
How much traffic does IRR - US 87 over Big Sandy Creek carry?
About 1,694 vehicles per day (2023 count), of which roughly 8% are trucks.
How long is IRR - US 87 over Big Sandy Creek?
The structure is 24 ft (7.3 m) long with a longest span of 11 ft (3.3 m).
Who owns IRR - US 87 over Big Sandy Creek?
It is owned by the State Highway Agency.