HWY 91 N over Beaverhead River 033
PoorBeaverhead County, Montana · 1M N Dillon · Structure no. L01311000+06001
- Built
- 1946
- 79 years old
- Condition
- Poor
- inspected May 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 150 ft
- 3 main spans
- Daily traffic
- 2,676
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
HWY 91 N over Beaverhead River 033 is a steel continuous stringer/multi-beam or girder carrying HWY 91 N over Beaverhead River 033 in Beaverhead County, Montana. It was built in 1946, so it is 79 years old, older than the Montana average of 47 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 2,676 vehicles a day, projected to reach 2,810 by 2043. The structure is 150 ft (45.6 m) long and 32 ft wide. If it were closed, the detour would be 3.1 mi (5 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
| 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was HWY 91 N over Beaverhead River 033 built?
It was built in 1946, making it 79 years old in 2025.
What condition is HWY 91 N over Beaverhead River 033 in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in May 2023.
How much traffic does HWY 91 N over Beaverhead River 033 carry?
About 2,676 vehicles per day (2023 count).
How long is HWY 91 N over Beaverhead River 033?
The structure is 150 ft (45.6 m) long with a longest span of 57 ft (17.5 m) and a deck 32 ft wide.
Who owns HWY 91 N over Beaverhead River 033?
It is owned by the State Highway Agency.