Frontage Road 146 over Drainage 032
GoodDeer Lodge County, Montana · 3M S Warm Springs · Structure no. L12146001+09001
- Built
- 1931
- 94 years old, rebuilt 1940
- Condition
- Good
- inspected December 2023
- Type
- Tee Beam
- Concrete
- Length
- 31 ft
- 1 main span
- Daily traffic
- 100
- 2025 count
- Owner
- State
- State Highway Agency
About this bridge
Frontage Road 146 over Drainage 032 is a concrete tee beam carrying Frontage Road 146 over Drainage 032 in Deer Lodge County, Montana. It was built in 1931 and reconstructed in 1940, so it is 94 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 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 31 ft (9.4 m) long and 40 ft wide. If it were closed, the detour would be 6.2 mi (10 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Frontage Road 146 over Drainage 032 built?
It was built in 1931, making it 94 years old in 2025. It was reconstructed in 1940.
What condition is Frontage Road 146 over Drainage 032 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 December 2023.
How much traffic does Frontage Road 146 over Drainage 032 carry?
About 100 vehicles per day (2025 count), of which roughly 3% are trucks.
How long is Frontage Road 146 over Drainage 032?
The structure is 31 ft (9.4 m) long with a longest span of 30 ft (9.1 m) and a deck 40 ft wide.
Who owns Frontage Road 146 over Drainage 032?
It is owned by the State Highway Agency.