Roe LN over Red Rock River 121
PoorPosted for loadBeaverhead County, Montana · W Red Rock · Structure no. L01239000+05001
- Built
- 1913
- 112 years old
- Condition
- Poor
- inspected July 2024
- Type
- Truss - Thru
- Steel
- Length
- 75 ft
- 1 main span
- Daily traffic
- 4
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
Roe LN over Red Rock River 121 is a steel truss - thru carrying Roe LN over Red Rock River 121 in Beaverhead County, Montana. It was built in 1913, so it is 112 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 4 vehicles a day, roughly 3% of them trucks, projected to reach 4 by 2043. The structure is 75 ft (22.9 m) long and 19 ft wide. If it were closed, the detour would be 3.7 mi (6 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 | 7 Good | Some minor problems. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, 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 | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Roe LN over Red Rock River 121 built?
It was built in 1913, making it 112 years old in 2025.
What condition is Roe LN over Red Rock River 121 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 Roe LN over Red Rock River 121 carry?
About 4 vehicles per day (2023 count), of which roughly 3% are trucks.
How long is Roe LN over Red Rock River 121?
The structure is 75 ft (22.9 m) long with a longest span of 75 ft (22.9 m) and a deck 19 ft wide.
Who owns Roe LN over Red Rock River 121?
It is owned by the County Highway Agency.