Lil Thompson R RD over Little Thompson Riv 091
FairSanders County, Montana · 19M N Plains · Structure no. L45108015+03001
- Built
- 1974
- 51 years old
- Condition
- Fair
- inspected August 2024
- Type
- Channel Beam
- Prestressed Concrete
- Length
- 33 ft
- 1 main span
- Daily traffic
- 41
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
Lil Thompson R RD over Little Thompson Riv 091 is a prestressed concrete channel beam carrying Lil Thompson R RD over Little Thompson Riv 091 in Sanders County, Montana. It was built in 1974, so it is 51 years old, older than the Montana average of 47 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 41 vehicles a day, roughly 7% of them trucks, projected to reach 44 by 2043. The structure is 33 ft (10.1 m) long and 24 ft wide. If it were closed, the detour would be 41 mi (66 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Lil Thompson R RD over Little Thompson Riv 091 built?
It was built in 1974, making it 51 years old in 2025.
What condition is Lil Thompson R RD over Little Thompson Riv 091 in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in August 2024.
How much traffic does Lil Thompson R RD over Little Thompson Riv 091 carry?
About 41 vehicles per day (2023 count), of which roughly 7% are trucks.
How long is Lil Thompson R RD over Little Thompson Riv 091?
The structure is 33 ft (10.1 m) long with a longest span of 32 ft (9.8 m) and a deck 24 ft wide.
Who owns Lil Thompson R RD over Little Thompson Riv 091?
It is owned by the County Highway Agency.