I 15 over Int 1st ST NE
GoodToole County, Montana · Sunburst · Structure no. I00015389+08151
- Built
- 1977
- 48 years old
- Condition
- Good
- inspected November 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 147 ft
- 3 main spans
- Daily traffic
- 955
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I 15 over Int 1st ST NE is a prestressed concrete stringer/multi-beam or girder carrying I 15 over Int 1st ST NE in Toole County, Montana. It was built in 1977, so it is 48 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 955 vehicles a day, roughly 40% of them trucks, projected to reach 1,003 by 2043. The structure is 147 ft (44.8 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 1st ST NE built?
It was built in 1977, making it 48 years old in 2025.
What condition is I 15 over Int 1st ST NE 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 November 2023.
How much traffic does I 15 over Int 1st ST NE carry?
About 955 vehicles per day (2023 count), of which roughly 40% are trucks.
How long is I 15 over Int 1st ST NE?
The structure is 147 ft (44.8 m) long with a longest span of 67 ft (20.4 m) and a deck 44 ft wide.
Who owns I 15 over Int 1st ST NE?
It is owned by the State Highway Agency.