I 15 over Int Melrose-Hwy 91
FairMadison County, Montana · Melrose · Structure no. I00015093+01222
- Built
- 1973
- 52 years old
- Condition
- Fair
- inspected December 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 128 ft
- 3 main spans
- Daily traffic
- 2,354
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I 15 over Int Melrose-Hwy 91 is a prestressed concrete stringer/multi-beam or girder carrying I 15 over Int Melrose-Hwy 91 in Madison 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 2,354 vehicles a day, roughly 19% of them trucks, projected to reach 2,542 by 2043. The structure is 128 ft (39 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I 15 over Int Melrose-Hwy 91 built?
It was built in 1973, making it 52 years old in 2025.
What condition is I 15 over Int Melrose-Hwy 91 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 Melrose-Hwy 91 carry?
About 2,354 vehicles per day (2023 count), of which roughly 19% are trucks.
How long is I 15 over Int Melrose-Hwy 91?
The structure is 128 ft (39 m) long with a longest span of 56 ft (17.2 m) and a deck 44 ft wide.
Who owns I 15 over Int Melrose-Hwy 91?
It is owned by the State Highway Agency.