S 359 over Jefferson River
Fair Condition59 years old1,429 vehicles/day
Location
| State | Montana |
| County | Madison |
| Location | Jefferson Island |
| Carries | S 359 |
| Crosses | Jefferson River |
| Coordinates | 45.85482, -111.95077 |
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 | 289.0 ft (88.1 m) |
| Max Span | 97.1 ft (29.6 m) |
| Deck Width | 33.1 ft (10.1 m) |
| Deck Area | 889.8 sq m |
| Main Spans | 3 |
| Year Built | 1967 |
Traffic
| Avg Daily Traffic | 1,429 (2023) |
| Truck Traffic | 5% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | October 2023 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | S00359002+02661 |