HWY 91 N over Big Hole River 041
Poor Condition86 years old158 vehicles/day
Location
| State | Montana |
| County | Beaverhead |
| Location | 22m N Dillon |
| Carries | HWY 91 N |
| Crosses | Big Hole River 041 |
| Coordinates | 45.52664, -112.70197 |
Condition Ratings
| Overall Condition | Poor |
| Deck | 4 (Poor) |
| Superstructure | 4 (Poor) |
| Substructure | 4 (Poor) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Steel |
| Design | Truss - Thru |
| Total Length | 239.8 ft (73.1 m) |
| Max Span | 148.0 ft (45.1 m) |
| Deck Width | 21.3 ft (6.5 m) |
| Deck Area | 475.1 sq m |
| Main Spans | 1 |
| Year Built | 1940 |
Traffic
| Avg Daily Traffic | 158 (2023) |
| Truck Traffic | 2% |
| Lanes On Bridge | 1 |
Inspection & Ownership
| Last Inspection | 724 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | L01311022+02001 |