Frontage Road 114 over Yellowstone River 015
FairPrairie County, Montana · 1M NE Fallon · Structure no. L40114001+05001
- Built
- 1945
- 80 years old
- Condition
- Fair
- inspected July 2023
- Type
- Truss - Thru
- Steel Continuous
- Length
- 1,145 ft
- 4 main spans
- Daily traffic
- 100
- 2025 count
- Owner
- State
- State Highway Agency
About this bridge
Frontage Road 114 over Yellowstone River 015 is a steel continuous truss - thru carrying Frontage Road 114 over Yellowstone River 015 in Prairie County, Montana. It was built in 1945, so it is 80 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 1,145 ft (348.9 m) long and 30 ft wide. If it were closed, the detour would be 14.9 mi (24 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 Frontage Road 114 over Yellowstone River 015 built?
It was built in 1945, making it 80 years old in 2025.
What condition is Frontage Road 114 over Yellowstone River 015 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 2023.
How much traffic does Frontage Road 114 over Yellowstone River 015 carry?
About 100 vehicles per day (2025 count), of which roughly 3% are trucks.
How long is Frontage Road 114 over Yellowstone River 015?
The structure is 1,145 ft (348.9 m) long with a longest span of 286 ft (87.1 m) and a deck 30 ft wide.
Who owns Frontage Road 114 over Yellowstone River 015?
It is owned by the State Highway Agency.