Acm RD over Thompson River
GoodSanders County, Montana · Acm RD · Structure no. 011608000000181
- Built
- 1996
- 29 years old
- Condition
- Good
- inspected July 2023
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 95 ft
- 1 main span
- Daily traffic
- 50
- Owner
- Federal
- U.S. Forest Service
About this bridge
Acm RD over Thompson River is a prestressed concrete tee beam carrying Acm RD over Thompson River in Sanders County, Montana. It was built in 1996, so it is 29 years old, younger 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 50 vehicles a day, projected to reach 75 by 2045. The structure is 95 ft (29 m) long and 18 ft wide. If it were closed, the detour would be 14.9 mi (24 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 | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Acm RD over Thompson River built?
It was built in 1996, making it 29 years old in 2025.
What condition is Acm RD over Thompson River 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 July 2023.
How much traffic does Acm RD over Thompson River carry?
About 50 vehicles per day (latest count).
How long is Acm RD over Thompson River?
The structure is 95 ft (29 m) long with a longest span of 93 ft (28.2 m) and a deck 18 ft wide.
Who owns Acm RD over Thompson River?
It is owned by the U.S. Forest Service.