6th Ave S over Big Spring Creek 133
PoorPosted for loadFergus County, Montana · LEWISTOWN-6th Ave S · Structure no. M14071000+00201
- Built
- 1962
- 63 years old, rebuilt 1975
- Condition
- Poor
- inspected March 2023
- Type
- Slab
- Prestressed Concrete
- Length
- 51 ft
- 2 main spans
- Daily traffic
- 437
- 2023 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
6th Ave S over Big Spring Creek 133 is a prestressed concrete slab carrying 6th Ave S over Big Spring Creek 133 in Fergus County, Montana. It was built in 1962 and reconstructed in 1975, so it is 63 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 437 vehicles a day, projected to reach 459 by 2043. The structure is 51 ft (15.5 m) long and 23 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 4 Poor | Advanced section loss, deterioration, 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 6th Ave S over Big Spring Creek 133 built?
It was built in 1962, making it 63 years old in 2025. It was reconstructed in 1975.
What condition is 6th Ave S over Big Spring Creek 133 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 March 2023.
How much traffic does 6th Ave S over Big Spring Creek 133 carry?
About 437 vehicles per day (2023 count).
How long is 6th Ave S over Big Spring Creek 133?
The structure is 51 ft (15.5 m) long with a longest span of 25 ft (7.6 m) and a deck 23 ft wide.
Who owns 6th Ave S over Big Spring Creek 133?
It is owned by the City or Municipal Highway Agency.