US 87-US 89 over Box Elder Creek
GoodCascade County, Montana · 8M SE Great Falls · Structure no. P00060082+03731
- Built
- 1989
- 36 years old
- Condition
- Good
- inspected May 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 75 ft
- 1 main span
- Daily traffic
- 4,614
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 87-US 89 over Box Elder Creek is a prestressed concrete stringer/multi-beam or girder carrying US 87-US 89 over Box Elder Creek in Cascade County, Montana. It was built in 1989, so it is 36 years old, younger 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 4,614 vehicles a day, roughly 12% of them trucks, projected to reach 4,845 by 2043. The structure is 75 ft (22.9 m) long and 42 ft wide. If it were closed, the detour would be 24.2 mi (39 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 | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 87-US 89 over Box Elder Creek built?
It was built in 1989, making it 36 years old in 2025.
What condition is US 87-US 89 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 May 2023.
How much traffic does US 87-US 89 over Box Elder Creek carry?
About 4,614 vehicles per day (2023 count), of which roughly 12% are trucks.
How long is US 87-US 89 over Box Elder Creek?
The structure is 75 ft (22.9 m) long with a longest span of 75 ft (22.9 m) and a deck 42 ft wide.
Who owns US 87-US 89 over Box Elder Creek?
It is owned by the State Highway Agency.