Main Street over Alkali Creek 209
Fair Condition51 years old100 vehicles/day
Location
| State | Montana |
| County | Yellowstone |
| Location | Billings |
| Carries | Main Street |
| Crosses | Alkali Creek 209 |
| Coordinates | 45.80082, -108.46903 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 211.6 ft (64.5 m) |
| Max Span | 65.3 ft (19.9 m) |
| Deck Width | 32.8 ft (10 m) |
| Deck Area | 645 sq m |
| Main Spans | 3 |
| Year Built | 1975 |
Traffic
| Avg Daily Traffic | 100 (2025) |
| Truck Traffic | 3% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 523 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | M56010001+00201 |