Browns Bridge RD over Big Hole River 123
PoorPosted for loadBeaverhead County, Montana · 6.2M S Melrose · Structure no. L01320003+01001
- Built
- 1915
- 110 years old
- Condition
- Poor
- inspected July 2024
- Type
- Truss - Thru
- Steel
- Length
- 175 ft
- 1 main span
- Daily traffic
- 100
- 2025 count
- Owner
- County
- County Highway Agency
About this bridge
Browns Bridge RD over Big Hole River 123 is a steel truss - thru carrying Browns Bridge RD over Big Hole River 123 in Beaverhead County, Montana. It was built in 1915, so it is 110 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 4 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. Its operating status is: posted for load restriction.
It carries about 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 175 ft (53.3 m) long and 16 ft wide. If it were closed, the detour would be 1.9 mi (3 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 4 Poor | Advanced section loss, deterioration, 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 Browns Bridge RD over Big Hole River 123 built?
It was built in 1915, making it 110 years old in 2025.
What condition is Browns Bridge RD over Big Hole River 123 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 July 2024.
How much traffic does Browns Bridge RD over Big Hole River 123 carry?
About 100 vehicles per day (2025 count), of which roughly 3% are trucks.
How long is Browns Bridge RD over Big Hole River 123?
The structure is 175 ft (53.3 m) long with a longest span of 175 ft (53.3 m) and a deck 16 ft wide.
Who owns Browns Bridge RD over Big Hole River 123?
It is owned by the County Highway Agency.