Second ST S-us 89 over Yellowstone River
Fair Condition96 years old4,964 vehicles/day
Location
| State | Montana |
| County | Park |
| Location | Gardiner-second ST S |
| Carries | Second ST S-us 89 |
| Crosses | Yellowstone River |
| Coordinates | 45.03221, -110.70555 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 5 (Fair) |
| Channel/Waterway | 5 (Fair) |
| Scour Critical | 3 — Scour critical |
Physical Characteristics
| Material | Steel Continuous |
| Design | Truss - Deck |
| Total Length | 408.8 ft (124.6 m) |
| Max Span | 191.9 ft (58.5 m) |
| Deck Width | 49.9 ft (15.2 m) |
| Deck Area | 1893.9 sq m |
| Main Spans | 3 |
| Year Built | 1930 (reconstructed 1975) |
Traffic
| Avg Daily Traffic | 4,964 (2023) |
| Truck Traffic | 1% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 723 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | P00011000+01651 |