US 87 over Yellowstone River
FairYellowstone County, Montana · Billings-Dick Johnston Br · Structure no. P00016000+06721
- Built
- 1993
- 32 years old
- Condition
- Fair
- inspected August 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 566 ft
- 5 main spans
- Daily traffic
- 23,199
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 87 over Yellowstone River is a prestressed concrete stringer/multi-beam or girder carrying US 87 over Yellowstone River in Yellowstone County, Montana. It was built in 1993, so it is 32 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 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 23,199 vehicles a day, roughly 4% of them trucks, projected to reach 24,359 by 2043. The structure is 566 ft (172.5 m) long and 91 ft wide. If it were closed, the detour would be 5 mi (8 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 | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| 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 Yellowstone River built?
It was built in 1993, making it 32 years old in 2025.
What condition is US 87 over Yellowstone River 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 August 2023.
How much traffic does US 87 over Yellowstone River carry?
About 23,199 vehicles per day (2023 count), of which roughly 4% are trucks.
How long is US 87 over Yellowstone River?
The structure is 566 ft (172.5 m) long with a longest span of 113 ft (34.4 m) and a deck 91 ft wide.
Who owns US 87 over Yellowstone River?
It is owned by the State Highway Agency.