E Boulder RD over E Boulder River 031
FairSweet Grass County, Montana · 3M S Mcleod · Structure no. L49116001+01001
- Built
- 1965
- 60 years old
- Condition
- Fair
- inspected July 2024
- Type
- Stringer/Multi-beam or Girder
- Wood or Timber
- Length
- 41 ft
- 1 main span
- Daily traffic
- 100
- 2025 count
- Owner
- County
- County Highway Agency
About this bridge
E Boulder RD over E Boulder River 031 is a wood or timber stringer/multi-beam or girder carrying E Boulder RD over E Boulder River 031 in Sweet Grass County, Montana. It was built in 1965, so it is 60 years old, older than the Montana average of 47 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 41 ft (12.5 m) long and 16 ft wide. If it were closed, the detour would be 123.7 mi (199 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was E Boulder RD over E Boulder River 031 built?
It was built in 1965, making it 60 years old in 2025.
What condition is E Boulder RD over E Boulder River 031 in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in July 2024.
How much traffic does E Boulder RD over E Boulder River 031 carry?
About 100 vehicles per day (2025 count), of which roughly 3% are trucks.
How long is E Boulder RD over E Boulder River 031?
The structure is 41 ft (12.5 m) long with a longest span of 39 ft (11.9 m) and a deck 16 ft wide.
Who owns E Boulder RD over E Boulder River 031?
It is owned by the County Highway Agency.