Upper N Fork RD over N Fk Bighole River 064
PoorPosted for loadBeaverhead County, Montana · 6M NW Wisdom · Structure no. L01004007+00001
- Built
- 1977
- 48 years old
- Condition
- Poor
- inspected August 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 46 ft
- 1 main span
- Daily traffic
- 100
- 2025 count
- Owner
- County
- County Highway Agency
About this bridge
Upper N Fork RD over N Fk Bighole River 064 is a steel stringer/multi-beam or girder carrying Upper N Fork RD over N Fk Bighole River 064 in Beaverhead County, Montana. It was built in 1977, so it is 48 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 46 ft (14 m) long and 20 ft wide. If it were closed, the detour would be 19.9 mi (32 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, 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 Upper N Fork RD over N Fk Bighole River 064 built?
It was built in 1977, making it 48 years old in 2025.
What condition is Upper N Fork RD over N Fk Bighole River 064 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 2023.
How much traffic does Upper N Fork RD over N Fk Bighole River 064 carry?
About 100 vehicles per day (2025 count), of which roughly 3% are trucks.
How long is Upper N Fork RD over N Fk Bighole River 064?
The structure is 46 ft (14 m) long with a longest span of 45 ft (13.7 m) and a deck 20 ft wide.
Who owns Upper N Fork RD over N Fk Bighole River 064?
It is owned by the County Highway Agency.