S 43 over Big Hole River
Fair Condition58 years old616 vehicles/day
Location
| State | Montana |
| County | Silver Bow |
| Location | 3m W Divide |
| Carries | S 43 |
| Crosses | Big Hole River |
| Coordinates | 45.75751, -112.78141 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 304.1 ft (92.7 m) |
| Max Span | 100.1 ft (30.5 m) |
| Deck Width | 36.4 ft (11.1 m) |
| Deck Area | 1029.0 sq m |
| Main Spans | 3 |
| Year Built | 1968 |
Traffic
| Avg Daily Traffic | 616 (2023) |
| Truck Traffic | 5% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 323 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | P00046075+00661 |