I 15 over Red Rock Creek
GoodJefferson County, Montana · 1M N Bernice · Structure no. I00015152+09001
- Built
- 1984
- 41 years old
- Condition
- Good
- inspected November 2024
- Type
- Culvert
- Steel
- Length
- 22 ft
- 1 main span
- Daily traffic
- 3,182
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I 15 over Red Rock Creek is a steel culvert carrying I 15 over Red Rock Creek in Jefferson County, Montana. It was built in 1984, so it is 41 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 3,182 vehicles a day, roughly 16% of them trucks, projected to reach 3,437 by 2043. The structure is 22 ft (6.6 m) long. If it were closed, the detour would be 90.1 mi (145 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 |
|---|---|---|
| Channel and channel protection | 7 Good | Some minor problems. |
| Culvert | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I 15 over Red Rock Creek built?
It was built in 1984, making it 41 years old in 2025.
What condition is I 15 over Red 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 November 2024.
How much traffic does I 15 over Red Rock Creek carry?
About 3,182 vehicles per day (2023 count), of which roughly 16% are trucks.
How long is I 15 over Red Rock Creek?
The structure is 22 ft (6.6 m) long with a longest span of 22 ft (6.6 m).
Who owns I 15 over Red Rock Creek?
It is owned by the State Highway Agency.