S 80 over Boyle-o`hanlon Coulees
Fair Condition87 years old479 vehicles/day
Location
| State | Montana |
| County | Chouteau |
| Location | 6m SE Fort Benton |
| Carries | S 80 |
| Crosses | Boyle-o`hanlon Coulees |
| Coordinates | 47.78676, -110.55303 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 5 (Fair) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Wood or Timber |
| Design | Stringer/Multi-beam |
| Total Length | 75.1 ft (22.9 m) |
| Max Span | 24.9 ft (7.6 m) |
| Deck Width | 26.2 ft (8 m) |
| Deck Area | 183.2 sq m |
| Main Spans | 3 |
| Year Built | 1939 |
Traffic
| Avg Daily Traffic | 479 (2023) |
| Truck Traffic | 16% |
| 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 | P00080008+07611 |