US 287 over Rock Creek
FairLewis and Clark County, Montana · 3M NE Wolf Creek · Structure no. P00009001+05001
- Built
- 1967
- 58 years old
- Condition
- Fair
- inspected April 2024
- Type
- Culvert
- Steel
- Length
- 25 ft
- 2 main spans
- Daily traffic
- 564
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 287 over Rock Creek is a steel culvert carrying US 287 over Rock Creek in Lewis and Clark County, Montana. It was built in 1967, so it is 58 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 564 vehicles a day, roughly 8% of them trucks, projected to reach 592 by 2043. The structure is 25 ft (7.6 m) long. If it were closed, the detour would be 60.9 mi (98 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 |
|---|---|---|
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
| Culvert | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 287 over Rock Creek built?
It was built in 1967, making it 58 years old in 2025.
What condition is US 287 over Rock 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 April 2024.
How much traffic does US 287 over Rock Creek carry?
About 564 vehicles per day (2023 count), of which roughly 8% are trucks.
How long is US 287 over Rock Creek?
The structure is 25 ft (7.6 m) long with a longest span of 11 ft (3.4 m).
Who owns US 287 over Rock Creek?
It is owned by the State Highway Agency.