S 500 over Flatwillow Creek
Good Condition64 years old14 vehicles/day
Location
| State | Montana |
| County | Petroleum |
| Location | 6m SW Mosby |
| Carries | S 500 |
| Crosses | Flatwillow Creek |
| Coordinates | 46.92868, -107.93286 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 5 (Fair) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 335.6 ft (102.3 m) |
| Max Span | 102.0 ft (31.1 m) |
| Deck Width | 26.6 ft (8.1 m) |
| Deck Area | 828.6 sq m |
| Main Spans | 2 |
| Year Built | 1962 (reconstructed 2015) |
Traffic
| Avg Daily Traffic | 14 (2023) |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 323 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | S00500030+00001 |