1st Ave over Big Ditch
GoodYellowstone County, Montana · LAUREL-1st Ave · Structure no. U06901000+09431
- Built
- 1968
- 57 years old
- Condition
- Good
- inspected November 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 37 ft
- 1 main span
- Daily traffic
- 3,046
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
1st Ave over Big Ditch is a steel stringer/multi-beam or girder carrying 1st Ave over Big Ditch in Yellowstone County, Montana. It was built in 1968, so it is 57 years old, older than the Montana average of 47 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 3,046 vehicles a day, roughly 1% of them trucks, projected to reach 3,335 by 2043. The structure is 37 ft (11.3 m) long and 43 ft wide. If it were closed, the detour would be 9.9 mi (16 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 1st Ave over Big Ditch built?
It was built in 1968, making it 57 years old in 2025.
What condition is 1st Ave over Big Ditch in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2024.
How much traffic does 1st Ave over Big Ditch carry?
About 3,046 vehicles per day (2023 count), of which roughly 1% are trucks.
How long is 1st Ave over Big Ditch?
The structure is 37 ft (11.3 m) long with a longest span of 35 ft (10.7 m) and a deck 43 ft wide.
Who owns 1st Ave over Big Ditch?
It is owned by the County Highway Agency.