Mt HWY 91 over Beaverhead River
Fair Condition81 years old612 vehicles/day
Location
| State | Montana |
| County | Beaverhead |
| Location | 3m SW Dillon |
| Carries | Mt HWY 91 |
| Crosses | Beaverhead River |
| Coordinates | 45.18167, -112.68898 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Steel Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 139.8 ft (42.6 m) |
| Max Span | 53.8 ft (16.4 m) |
| Deck Width | 34.4 ft (10.5 m) |
| Deck Area | 447.3 sq m |
| Main Spans | 3 |
| Year Built | 1945 (reconstructed 1994) |
Traffic
| Avg Daily Traffic | 612 (2023) |
| Truck Traffic | 1% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 423 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | S00222003+02951 |