I 15 over Int Divide-Hwy 43
GoodSilver Bow County, Montana · Divide · Structure no. I00015102+04872
- Built
- 1976
- 49 years old
- Condition
- Good
- inspected February 2025
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 153 ft
- 3 main spans
- Daily traffic
- 2,283
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I 15 over Int Divide-Hwy 43 is a prestressed concrete stringer/multi-beam or girder carrying I 15 over Int Divide-Hwy 43 in Silver Bow County, Montana. It was built in 1976, so it is 49 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 2,283 vehicles a day, roughly 20% of them trucks, projected to reach 2,465 by 2043. The structure is 153 ft (46.5 m) long and 44 ft wide.
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. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I 15 over Int Divide-Hwy 43 built?
It was built in 1976, making it 49 years old in 2025.
What condition is I 15 over Int Divide-Hwy 43 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 February 2025.
How much traffic does I 15 over Int Divide-Hwy 43 carry?
About 2,283 vehicles per day (2023 count), of which roughly 20% are trucks.
How long is I 15 over Int Divide-Hwy 43?
The structure is 153 ft (46.5 m) long with a longest span of 71 ft (21.7 m) and a deck 44 ft wide.
Who owns I 15 over Int Divide-Hwy 43?
It is owned by the State Highway Agency.