IRR - US 87 over Box Elder Creek
GoodHill County, Montana · Box Elder · Structure no. P00010089+07281
- Built
- 1969
- 56 years old
- Condition
- Good
- inspected November 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 72 ft
- 1 main span
- Daily traffic
- 1,694
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
IRR - US 87 over Box Elder Creek is a prestressed concrete stringer/multi-beam or girder carrying IRR - US 87 over Box Elder Creek in Hill County, Montana. It was built in 1969, so it is 56 years old, older than the Montana average of 47 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 1,694 vehicles a day, roughly 8% of them trucks, projected to reach 1,779 by 2043. The structure is 72 ft (21.8 m) long and 46 ft wide. If it were closed, the detour would be 123.7 mi (199 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 8 Very Good | No problems noted. |
| 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 - US 87 over Box Elder Creek built?
It was built in 1969, making it 56 years old in 2025.
What condition is IRR - US 87 over Box Elder Creek in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2023.
How much traffic does IRR - US 87 over Box Elder Creek carry?
About 1,694 vehicles per day (2023 count), of which roughly 8% are trucks.
How long is IRR - US 87 over Box Elder Creek?
The structure is 72 ft (21.8 m) long with a longest span of 70 ft (21.3 m) and a deck 46 ft wide.
Who owns IRR - US 87 over Box Elder Creek?
It is owned by the State Highway Agency.