IRR BIA RTE 1 over Birch Creek
FairPondera County, Montana · 13 KM SE of Heart Butte · Structure no. 00000000000C105
- Built
- 1966
- 59 years old
- Condition
- Fair
- inspected September 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 200 ft
- 3 main spans
- Daily traffic
- 700
- 2023 count
- Owner
- Federal
- Bureau of Indian Affairs
About this bridge
IRR BIA RTE 1 over Birch Creek is a prestressed concrete stringer/multi-beam or girder carrying IRR BIA RTE 1 over Birch Creek in Pondera County, Montana. It was built in 1966, so it is 59 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 700 vehicles a day, roughly 10% of them trucks, projected to reach 819 by 2043. The structure is 200 ft (61.1 m) long and 27 ft wide. If it were closed, the detour would be 49.7 mi (80 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was IRR BIA RTE 1 over Birch Creek built?
It was built in 1966, making it 59 years old in 2025.
What condition is IRR BIA RTE 1 over Birch Creek 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 Birch Creek carry?
About 700 vehicles per day (2023 count), of which roughly 10% are trucks.
How long is IRR BIA RTE 1 over Birch Creek?
The structure is 200 ft (61.1 m) long with a longest span of 65 ft (19.8 m) and a deck 27 ft wide.
Who owns IRR BIA RTE 1 over Birch Creek?
It is owned by the Bureau of Indian Affairs.