RD 4785 over Big Cherry CR
FairClosed to trafficLincoln County, Montana · Upper Big Cherry · Structure no. 011405000000071
- Built
- 1966
- 59 years old
- Condition
- Fair
- inspected July 2024
- Type
- Stringer/Multi-beam or Girder
- Wood or Timber
- Length
- 32 ft
- 1 main span
- Daily traffic
- 50
- Owner
- Federal
- U.S. Forest Service
About this bridge
RD 4785 over Big Cherry CR is a wood or timber stringer/multi-beam or girder carrying RD 4785 over Big Cherry CR in Lincoln County, Montana. It was built in 1966, so it is 59 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. Its operating status is: closed to all traffic.
It carries about 50 vehicles a day, projected to reach 75 by 2045. The structure is 32 ft (9.8 m) long and 18 ft wide.
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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was RD 4785 over Big Cherry CR built?
It was built in 1966, making it 59 years old in 2025.
What condition is RD 4785 over Big Cherry CR 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 July 2024.
How much traffic does RD 4785 over Big Cherry CR carry?
About 50 vehicles per day (latest count).
How long is RD 4785 over Big Cherry CR?
The structure is 32 ft (9.8 m) long with a longest span of 31 ft (9.3 m) and a deck 18 ft wide.
Who owns RD 4785 over Big Cherry CR?
It is owned by the U.S. Forest Service.