Crow Rock RD over Grimes Creek 010
FairCuster County, Montana · 19M NW Miles City · Structure no. L09011001+09001
- Built
- 1986
- 39 years old
- Condition
- Fair
- inspected April 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 35 ft
- 1 main span
- Daily traffic
- 100
- 2025 count
- Owner
- County
- County Highway Agency
About this bridge
Crow Rock RD over Grimes Creek 010 is a steel stringer/multi-beam or girder carrying Crow Rock RD over Grimes Creek 010 in Custer County, Montana. It was built in 1986, so it is 39 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 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 35 ft (10.8 m) long and 24 ft wide. If it were closed, the detour would be 34.8 mi (56 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Crow Rock RD over Grimes Creek 010 built?
It was built in 1986, making it 39 years old in 2025.
What condition is Crow Rock RD over Grimes Creek 010 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 April 2023.
How much traffic does Crow Rock RD over Grimes Creek 010 carry?
About 100 vehicles per day (2025 count), of which roughly 3% are trucks.
How long is Crow Rock RD over Grimes Creek 010?
The structure is 35 ft (10.8 m) long with a longest span of 34 ft (10.4 m) and a deck 24 ft wide.
Who owns Crow Rock RD over Grimes Creek 010?
It is owned by the County Highway Agency.