US 87 over Boyd Creek
FairFergus County, Montana · 1M E Lewistown · Structure no. P00057084+02521
- Built
- 1942
- 83 years old
- Condition
- Fair
- inspected September 2024
- Type
- Stringer/Multi-beam or Girder
- Wood or Timber
- Length
- 57 ft
- 3 main spans
- Daily traffic
- 2,831
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 87 over Boyd Creek is a wood or timber stringer/multi-beam or girder carrying US 87 over Boyd Creek in Fergus County, Montana. It was built in 1942, so it is 83 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 6 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 2,831 vehicles a day, roughly 4% of them trucks, projected to reach 2,973 by 2043. The structure is 57 ft (17.4 m) long and 30 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 87 over Boyd Creek built?
It was built in 1942, making it 83 years old in 2025.
What condition is US 87 over Boyd Creek 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 2024.
How much traffic does US 87 over Boyd Creek carry?
About 2,831 vehicles per day (2023 count), of which roughly 4% are trucks.
How long is US 87 over Boyd Creek?
The structure is 57 ft (17.4 m) long with a longest span of 19 ft (5.8 m) and a deck 30 ft wide.
Who owns US 87 over Boyd Creek?
It is owned by the State Highway Agency.