IRR BIA RTE 205 over Little Big Horn River
FairBig Horn County, Montana · 0.4KM NW of JCT 205 & 418 · Structure no. 00000000000C222
- Built
- 1993
- 32 years old
- Condition
- Fair
- inspected June 2024
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 61 ft
- 1 main span
- Daily traffic
- 80
- 2024 count
- Owner
- Federal
- Bureau of Indian Affairs
About this bridge
IRR BIA RTE 205 over Little Big Horn River is a prestressed concrete tee beam carrying IRR BIA RTE 205 over Little Big Horn River in Big Horn County, Montana. It was built in 1993, so it is 32 years old, younger 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 80 vehicles a day, roughly 10% of them trucks, projected to reach 95 by 2044. The structure is 61 ft (18.6 m) long and 30 ft wide. If it were closed, the detour would be 65.2 mi (105 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 | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was IRR BIA RTE 205 over Little Big Horn River built?
It was built in 1993, making it 32 years old in 2025.
What condition is IRR BIA RTE 205 over Little Big Horn River 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 June 2024.
How much traffic does IRR BIA RTE 205 over Little Big Horn River carry?
About 80 vehicles per day (2024 count), of which roughly 10% are trucks.
How long is IRR BIA RTE 205 over Little Big Horn River?
The structure is 61 ft (18.6 m) long with a longest span of 58 ft (17.7 m) and a deck 30 ft wide.
Who owns IRR BIA RTE 205 over Little Big Horn River?
It is owned by the Bureau of Indian Affairs.