S 340 over Int Fallon-I 94
FairPrairie County, Montana · Fallon · Structure no. S00340000+04871
- Built
- 1978
- 47 years old
- Condition
- Fair
- inspected February 2025
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 275 ft
- 4 main spans
- Daily traffic
- 367
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
S 340 over Int Fallon-I 94 is a prestressed concrete stringer/multi-beam or girder carrying S 340 over Int Fallon-I 94 in Prairie County, Montana. It was built in 1978, so it is 47 years old, younger 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 367 vehicles a day, roughly 16% of them trucks, projected to reach 385 by 2043. The structure is 275 ft (83.9 m) long and 34 ft wide.
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 | 7 Good | Some minor problems. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was S 340 over Int Fallon-I 94 built?
It was built in 1978, making it 47 years old in 2025.
What condition is S 340 over Int Fallon-I 94 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 February 2025.
How much traffic does S 340 over Int Fallon-I 94 carry?
About 367 vehicles per day (2023 count), of which roughly 16% are trucks.
How long is S 340 over Int Fallon-I 94?
The structure is 275 ft (83.9 m) long with a longest span of 100 ft (30.5 m) and a deck 34 ft wide.
Who owns S 340 over Int Fallon-I 94?
It is owned by the State Highway Agency.