David Thompson Brg over Kootenai River D/S Dam
FairLincoln County, Montana · Libby Dam Montana · Structure no. CEPNWSMT1SGLI01
- Built
- 1967
- 58 years old, rebuilt 1982
- Condition
- Fair
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 489 ft
- 5 main spans
- Daily traffic
- 100
- 2022 count
- Owner
- Federal
- Corps of Engineers (Civil)
About this bridge
David Thompson Brg over Kootenai River D/S Dam is a steel continuous stringer/multi-beam or girder carrying David Thompson Brg over Kootenai River D/S Dam in Lincoln County, Montana. It was built in 1967 and reconstructed in 1982, 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 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 100 vehicles a day, roughly 10% of them trucks, projected to reach 150 by 2043. The structure is 489 ft (149 m) long and 36 ft wide. If it were closed, the detour would be 9.9 mi (16 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 | 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 David Thompson Brg over Kootenai River D/S Dam built?
It was built in 1967, making it 58 years old in 2025. It was reconstructed in 1982.
What condition is David Thompson Brg over Kootenai River D/S Dam 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 David Thompson Brg over Kootenai River D/S Dam carry?
About 100 vehicles per day (2022 count), of which roughly 10% are trucks.
How long is David Thompson Brg over Kootenai River D/S Dam?
The structure is 489 ft (149 m) long with a longest span of 97 ft (29.5 m) and a deck 36 ft wide.
Who owns David Thompson Brg over Kootenai River D/S Dam?
It is owned by the Corps of Engineers (Civil).