Rock Creek RD over Big Lake Creek 081
PoorPosted for loadBeaverhead County, Montana · 4M SW Wisdom · Structure no. L01015000+02001
- Built
- 1958
- 67 years old
- Condition
- Poor
- inspected July 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 28 ft
- 1 main span
- Daily traffic
- 100
- 2025 count
- Owner
- County
- County Highway Agency
About this bridge
Rock Creek RD over Big Lake Creek 081 is a steel stringer/multi-beam or girder carrying Rock Creek RD over Big Lake Creek 081 in Beaverhead County, Montana. It was built in 1958, so it is 67 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 3 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 28 ft (8.5 m) long and 20 ft wide. If it were closed, the detour would be 6.2 mi (10 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
| 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 Rock Creek RD over Big Lake Creek 081 built?
It was built in 1958, making it 67 years old in 2025.
What condition is Rock Creek RD over Big Lake Creek 081 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 2023.
How much traffic does Rock Creek RD over Big Lake Creek 081 carry?
About 100 vehicles per day (2025 count), of which roughly 3% are trucks.
How long is Rock Creek RD over Big Lake Creek 081?
The structure is 28 ft (8.5 m) long with a longest span of 26 ft (7.9 m) and a deck 20 ft wide.
Who owns Rock Creek RD over Big Lake Creek 081?
It is owned by the County Highway Agency.