IRR BIA RTE 130 over St. Mary River
FairGlacier County, Montana · 13 KM South of Babb · Structure no. 00000000000C118
- Built
- 1964
- 61 years old, rebuilt 1976
- Condition
- Fair
- inspected September 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 182 ft
- 3 main spans
- Daily traffic
- 300
- 2023 count
- Owner
- Federal
- Bureau of Indian Affairs
About this bridge
IRR BIA RTE 130 over St. Mary River is a prestressed concrete stringer/multi-beam or girder carrying IRR BIA RTE 130 over St. Mary River in Glacier County, Montana. It was built in 1964 and reconstructed in 1976, so it is 61 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 5 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 300 vehicles a day, roughly 10% of them trucks, projected to reach 360 by 2043. The structure is 182 ft (55.6 m) long and 27 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 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 130 over St. Mary River built?
It was built in 1964, making it 61 years old in 2025. It was reconstructed in 1976.
What condition is IRR BIA RTE 130 over St. Mary 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 130 over St. Mary River carry?
About 300 vehicles per day (2023 count), of which roughly 10% are trucks.
How long is IRR BIA RTE 130 over St. Mary River?
The structure is 182 ft (55.6 m) long with a longest span of 60 ft (18.3 m) and a deck 27 ft wide.
Who owns IRR BIA RTE 130 over St. Mary River?
It is owned by the Bureau of Indian Affairs.