RD 6144 over Bobtail CR
PoorLincoln County, Montana · Bobtail Face · Structure no. 011405000000106
- Built
- 1973
- 52 years old
- Condition
- Poor
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Wood or Timber
- Length
- 24 ft
- 1 main span
- Daily traffic
- 50
- Owner
- Federal
- U.S. Forest Service
About this bridge
RD 6144 over Bobtail CR is a wood or timber stringer/multi-beam or girder carrying RD 6144 over Bobtail CR in Lincoln County, Montana. It was built in 1973, so it is 52 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.
It carries about 50 vehicles a day, projected to reach 75 by 2045. The structure is 24 ft (7.3 m) long and 15 ft wide. If it were closed, the detour would be 98.2 mi (158 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was RD 6144 over Bobtail CR built?
It was built in 1973, making it 52 years old in 2025.
What condition is RD 6144 over Bobtail CR 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 August 2024.
How much traffic does RD 6144 over Bobtail CR carry?
About 50 vehicles per day (latest count).
How long is RD 6144 over Bobtail CR?
The structure is 24 ft (7.3 m) long with a longest span of 23 ft (6.9 m) and a deck 15 ft wide.
Who owns RD 6144 over Bobtail CR?
It is owned by the U.S. Forest Service.