I 15 over Int Ulm
FairCascade County, Montana · Ulm · Structure no. I00015270+04312
- Built
- 1969
- 56 years old
- Condition
- Fair
- inspected March 2023
- Type
- Tee Beam
- Concrete Continuous
- Length
- 130 ft
- 3 main spans
- Daily traffic
- 3,145
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I 15 over Int Ulm is a concrete continuous tee beam carrying I 15 over Int Ulm in Cascade County, Montana. It was built in 1969, so it is 56 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 3,145 vehicles a day, roughly 12% of them trucks, projected to reach 3,301 by 2043. The structure is 130 ft (39.6 m) long and 41 ft wide.
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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I 15 over Int Ulm built?
It was built in 1969, making it 56 years old in 2025.
What condition is I 15 over Int Ulm 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 March 2023.
How much traffic does I 15 over Int Ulm carry?
About 3,145 vehicles per day (2023 count), of which roughly 12% are trucks.
How long is I 15 over Int Ulm?
The structure is 130 ft (39.6 m) long with a longest span of 50 ft (15.2 m) and a deck 41 ft wide.
Who owns I 15 over Int Ulm?
It is owned by the State Highway Agency.