S 391-MOORHEAD RD over Drainage Overflow
FairPosted for loadPowder River County, Montana · 4M SW Broadus · Structure no. S00391003+07001
- Built
- 1935
- 90 years old
- Condition
- Fair
- inspected September 2023
- Type
- Stringer/Multi-beam or Girder
- Wood or Timber
- Length
- 46 ft
- 3 main spans
- Daily traffic
- 74
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
S 391-MOORHEAD RD over Drainage Overflow is a wood or timber stringer/multi-beam or girder carrying S 391-MOORHEAD RD over Drainage Overflow in Powder River County, Montana. It was built in 1935, so it is 90 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. Its operating status is: posted for load restriction.
It carries about 74 vehicles a day, roughly 1% of them trucks, projected to reach 78 by 2043. The structure is 46 ft (14 m) long and 22 ft wide. If it were closed, the detour would be 39.8 mi (64 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 | 7 Good | Some minor problems. |
| 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 | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was S 391-MOORHEAD RD over Drainage Overflow built?
It was built in 1935, making it 90 years old in 2025.
What condition is S 391-MOORHEAD RD over Drainage Overflow 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 September 2023.
How much traffic does S 391-MOORHEAD RD over Drainage Overflow carry?
About 74 vehicles per day (2023 count), of which roughly 1% are trucks.
How long is S 391-MOORHEAD RD over Drainage Overflow?
The structure is 46 ft (14 m) long with a longest span of 15 ft (4.6 m) and a deck 22 ft wide.
Who owns S 391-MOORHEAD RD over Drainage Overflow?
It is owned by the County Highway Agency.