34th ST NW over Sep 34th St-I 15
GoodCascade County, Montana · 1M W Great Falls · Structure no. L07701000+06501
- Built
- 1967
- 58 years old
- Condition
- Good
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 247 ft
- 4 main spans
- Daily traffic
- 1,447
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
34th ST NW over Sep 34th St-I 15 is a prestressed concrete stringer/multi-beam or girder carrying 34th ST NW over Sep 34th St-I 15 in Cascade County, Montana. It was built in 1967, so it is 58 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 1,447 vehicles a day, roughly 3% of them trucks, projected to reach 1,541 by 2043. The structure is 247 ft (75.3 m) long and 34 ft wide. If it were closed, the detour would be 3.7 mi (6 km).
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 | 8 Very Good | No problems noted. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 34th ST NW over Sep 34th St-I 15 built?
It was built in 1967, making it 58 years old in 2025.
What condition is 34th ST NW over Sep 34th St-I 15 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 August 2024.
How much traffic does 34th ST NW over Sep 34th St-I 15 carry?
About 1,447 vehicles per day (2023 count), of which roughly 3% are trucks.
How long is 34th ST NW over Sep 34th St-I 15?
The structure is 247 ft (75.3 m) long with a longest span of 65 ft (19.8 m) and a deck 34 ft wide.
Who owns 34th ST NW over Sep 34th St-I 15?
It is owned by the State Highway Agency.