IRR BIA RTE 4 over Tongue River
FairRosebud County, Montana · At Birney Village · Structure no. 00000000000C703
- Built
- 1970
- 55 years old
- Condition
- Fair
- inspected June 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 200 ft
- 3 main spans
- Daily traffic
- 800
- 2024 count
- Owner
- Federal
- Bureau of Indian Affairs
About this bridge
IRR BIA RTE 4 over Tongue River is a prestressed concrete stringer/multi-beam or girder carrying IRR BIA RTE 4 over Tongue River in Rosebud County, Montana. It was built in 1970, so it is 55 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 800 vehicles a day, roughly 10% of them trucks, projected to reach 936 by 2044. The structure is 200 ft (61.1 m) long and 34 ft wide. If it were closed, the detour would be 60.3 mi (97 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 BIA RTE 4 over Tongue River built?
It was built in 1970, making it 55 years old in 2025.
What condition is IRR BIA RTE 4 over Tongue 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 4 over Tongue River carry?
About 800 vehicles per day (2024 count), of which roughly 10% are trucks.
How long is IRR BIA RTE 4 over Tongue River?
The structure is 200 ft (61.1 m) long with a longest span of 67 ft (20.4 m) and a deck 34 ft wide.
Who owns IRR BIA RTE 4 over Tongue River?
It is owned by the Bureau of Indian Affairs.