S 80 over Tributary Flat Creek
Fair Condition77 years old235 vehicles/day
Location
| State | Montana |
| County | Chouteau |
| Location | 2m NW Square Butte |
| Carries | S 80 |
| Crosses | Tributary Flat Creek |
| Coordinates | 47.54563, -110.21186 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 5 (Fair) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Wood or Timber |
| Design | Stringer/Multi-beam |
| Total Length | 26.9 ft (8.2 m) |
| Max Span | 24.9 ft (7.6 m) |
| Deck Width | 29.9 ft (9.1 m) |
| Deck Area | 74.6 sq m |
| Main Spans | 1 |
| Year Built | 1949 (reconstructed 1964) |
Traffic
| Avg Daily Traffic | 235 (2023) |
| Truck Traffic | 12% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 823 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | P00080033+04531 |