Main Street over Alkali Creek 209
FairYellowstone County, Montana · Billings · Structure no. M56010001+00201
- Built
- 1975
- 50 years old
- Condition
- Fair
- inspected May 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 212 ft
- 3 main spans
- Daily traffic
- 100
- 2025 count
- Owner
- County
- County Highway Agency
About this bridge
Main Street over Alkali Creek 209 is a prestressed concrete stringer/multi-beam or girder carrying Main Street over Alkali Creek 209 in Yellowstone County, Montana. It was built in 1975, so it is 50 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 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 212 ft (64.5 m) long and 33 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Main Street over Alkali Creek 209 built?
It was built in 1975, making it 50 years old in 2025.
What condition is Main Street over Alkali Creek 209 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 May 2023.
How much traffic does Main Street over Alkali Creek 209 carry?
About 100 vehicles per day (2025 count), of which roughly 3% are trucks.
How long is Main Street over Alkali Creek 209?
The structure is 212 ft (64.5 m) long with a longest span of 65 ft (19.9 m) and a deck 33 ft wide.
Who owns Main Street over Alkali Creek 209?
It is owned by the County Highway Agency.