I 15 over Little Muddy Creek
GoodCascade County, Montana · 6M N Cascade · Structure no. I00015262+06421
- Built
- 1958
- 67 years old
- Condition
- Good
- inspected April 2024
- Type
- Tee Beam
- Concrete Continuous
- Length
- 100 ft
- 3 main spans
- Daily traffic
- 2,455
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I 15 over Little Muddy Creek is a concrete continuous tee beam carrying I 15 over Little Muddy Creek in Cascade County, Montana. It was built in 1958, so it is 67 years old, older 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 2,455 vehicles a day, roughly 16% of them trucks, projected to reach 2,578 by 2043. The structure is 100 ft (30.5 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 7 Good | Some minor problems. |
| 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 I 15 over Little Muddy Creek built?
It was built in 1958, making it 67 years old in 2025.
What condition is I 15 over Little Muddy 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 April 2024.
How much traffic does I 15 over Little Muddy Creek carry?
About 2,455 vehicles per day (2023 count), of which roughly 16% are trucks.
How long is I 15 over Little Muddy Creek?
The structure is 100 ft (30.5 m) long with a longest span of 60 ft (18.3 m) and a deck 41 ft wide.
Who owns I 15 over Little Muddy Creek?
It is owned by the State Highway Agency.