I 15 over Int Rock Cr-Brownes Br R
FairBeaverhead County, Montana · 8M S Melrose · Structure no. I00015085+02241
- Built
- 1973
- 52 years old
- Condition
- Fair
- inspected December 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 133 ft
- 3 main spans
- Daily traffic
- 1,926
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I 15 over Int Rock Cr-Brownes Br R is a prestressed concrete stringer/multi-beam or girder carrying I 15 over Int Rock Cr-Brownes Br R in Beaverhead County, Montana. It was built in 1973, so it is 52 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 1,926 vehicles a day, roughly 24% of them trucks, projected to reach 2,080 by 2043. The structure is 133 ft (40.5 m) long and 44 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 Rock Cr-Brownes Br R built?
It was built in 1973, making it 52 years old in 2025.
What condition is I 15 over Int Rock Cr-Brownes Br R 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 December 2024.
How much traffic does I 15 over Int Rock Cr-Brownes Br R carry?
About 1,926 vehicles per day (2023 count), of which roughly 24% are trucks.
How long is I 15 over Int Rock Cr-Brownes Br R?
The structure is 133 ft (40.5 m) long with a longest span of 56 ft (17.2 m) and a deck 44 ft wide.
Who owns I 15 over Int Rock Cr-Brownes Br R?
It is owned by the State Highway Agency.