IRR BIA RTE 1 over Two Medicine River
FairGlacier County, Montana · 16 KM South of Browning · Structure no. 00000000000C101
- Built
- 1967
- 58 years old
- Condition
- Fair
- inspected September 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 358 ft
- 4 main spans
- Daily traffic
- 1,000
- 2023 count
- Owner
- Federal
- Bureau of Indian Affairs
About this bridge
IRR BIA RTE 1 over Two Medicine River is a prestressed concrete stringer/multi-beam or girder carrying IRR BIA RTE 1 over Two Medicine River in Glacier County, Montana. It was built in 1967, so it is 58 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 1,000 vehicles a day, roughly 10% of them trucks, projected to reach 1,300 by 2043. The structure is 358 ft (109.1 m) long and 29 ft wide. If it were closed, the detour would be 34.2 mi (55 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| 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 1 over Two Medicine River built?
It was built in 1967, making it 58 years old in 2025.
What condition is IRR BIA RTE 1 over Two Medicine 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 September 2023.
How much traffic does IRR BIA RTE 1 over Two Medicine River carry?
About 1,000 vehicles per day (2023 count), of which roughly 10% are trucks.
How long is IRR BIA RTE 1 over Two Medicine River?
The structure is 358 ft (109.1 m) long with a longest span of 100 ft (30.5 m) and a deck 29 ft wide.
Who owns IRR BIA RTE 1 over Two Medicine River?
It is owned by the Bureau of Indian Affairs.