IRR RTE BIA 55 over Willow Creek Tributary
FairGlacier County, Montana · At Blackfoot · Structure no. 00000000000C147
- Built
- 2005
- 20 years old
- Condition
- Fair
- inspected September 2023
- Type
- Stringer/Multi-beam or Girder
- Concrete
- Length
- 60 ft
- 1 main span
- Daily traffic
- 70
- 2023 count
- Owner
- Federal
- Bureau of Indian Affairs
About this bridge
IRR RTE BIA 55 over Willow Creek Tributary is a concrete stringer/multi-beam or girder carrying IRR RTE BIA 55 over Willow Creek Tributary in Glacier County, Montana. It was built in 2005, so it is 20 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 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 70 vehicles a day, roughly 10% of them trucks, projected to reach 100 by 2043. The structure is 60 ft (18.3 m) long and 28 ft wide. If it were closed, the detour would be 6.2 mi (10 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 | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was IRR RTE BIA 55 over Willow Creek Tributary built?
It was built in 2005, making it 20 years old in 2025.
What condition is IRR RTE BIA 55 over Willow Creek Tributary 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 RTE BIA 55 over Willow Creek Tributary carry?
About 70 vehicles per day (2023 count), of which roughly 10% are trucks.
How long is IRR RTE BIA 55 over Willow Creek Tributary?
The structure is 60 ft (18.3 m) long with a longest span of 58 ft (17.6 m) and a deck 28 ft wide.
Who owns IRR RTE BIA 55 over Willow Creek Tributary?
It is owned by the Bureau of Indian Affairs.