6th LN NE over Drainage 129
PoorPosted for loadTeton County, Montana · 13M SW Dutton · Structure no. L50081005+06001
- Built
- 1974
- 51 years old
- Condition
- Poor
- inspected January 2025
- Type
- Stringer/Multi-beam or Girder
- Wood or Timber
- Length
- 23 ft
- 1 main span
- Daily traffic
- 100
- 2025 count
- Owner
- County
- County Highway Agency
About this bridge
6th LN NE over Drainage 129 is a wood or timber stringer/multi-beam or girder carrying 6th LN NE over Drainage 129 in Teton County, Montana. It was built in 1974, so it is 51 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 23 ft (6.9 m) long and 24 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 | 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 6th LN NE over Drainage 129 built?
It was built in 1974, making it 51 years old in 2025.
What condition is 6th LN NE over Drainage 129 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 January 2025.
How much traffic does 6th LN NE over Drainage 129 carry?
About 100 vehicles per day (2025 count), of which roughly 3% are trucks.
How long is 6th LN NE over Drainage 129?
The structure is 23 ft (6.9 m) long with a longest span of 21 ft (6.4 m) and a deck 24 ft wide.
Who owns 6th LN NE over Drainage 129?
It is owned by the County Highway Agency.