US 93 over Bitterroot River
FairRavalli County, Montana · 3M S Hamilton · Structure no. P00007043+06661
- Built
- 1949
- 76 years old, rebuilt 1973
- Condition
- Fair
- inspected April 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 302 ft
- 4 main spans
- Daily traffic
- 6,979
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 93 over Bitterroot River is a steel continuous stringer/multi-beam or girder carrying US 93 over Bitterroot River in Ravalli County, Montana. It was built in 1949 and reconstructed in 1973, so it is 76 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 5 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 6,979 vehicles a day, roughly 1% of them trucks, projected to reach 7,328 by 2043. The structure is 302 ft (92 m) long and 32 ft wide. If it were closed, the detour would be 78.3 mi (126 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 93 over Bitterroot River built?
It was built in 1949, making it 76 years old in 2025. It was reconstructed in 1973.
What condition is US 93 over Bitterroot River 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 April 2024.
How much traffic does US 93 over Bitterroot River carry?
About 6,979 vehicles per day (2023 count), of which roughly 1% are trucks.
How long is US 93 over Bitterroot River?
The structure is 302 ft (92 m) long with a longest span of 83 ft (25.3 m) and a deck 32 ft wide.
Who owns US 93 over Bitterroot River?
It is owned by the State Highway Agency.