US 87 over Rock Creek
GoodFergus County, Montana · 2M NE Moore · Structure no. 000000202105974
- Built
- 2021
- 4 years old
- Condition
- Good
- inspected October 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 64 ft
- 1 main span
- Daily traffic
- 2,319
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 87 over Rock Creek is a prestressed concrete stringer/multi-beam or girder carrying US 87 over Rock Creek in Fergus County, Montana. It was built in 2021, so it is 4 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 2,319 vehicles a day, roughly 6% of them trucks, projected to reach 2,435 by 2043. The structure is 64 ft (19.5 m) long and 43 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 | 8 Very Good | No problems noted. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 87 over Rock Creek built?
It was built in 2021, making it 4 years old in 2025.
What condition is US 87 over Rock 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 October 2023.
How much traffic does US 87 over Rock Creek carry?
About 2,319 vehicles per day (2023 count), of which roughly 6% are trucks.
How long is US 87 over Rock Creek?
The structure is 64 ft (19.5 m) long with a longest span of 64 ft (19.5 m) and a deck 43 ft wide.
Who owns US 87 over Rock Creek?
It is owned by the State Highway Agency.