Old HWY 10 over Bighorn River 126
Fair Condition96 years old100 vehicles/day
Location
| State | Montana |
| County | Yellowstone |
| Location | 4m E Custer |
| Carries | Old HWY 10 |
| Crosses | Bighorn River 126 |
| Coordinates | 46.14729, -107.46731 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 5 (Fair) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 5 (Fair) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Steel |
| Design | Truss - Thru |
| Total Length | 629.3 ft (191.8 m) |
| Max Span | 274.9 ft (83.8 m) |
| Deck Width | 21.0 ft (6.4 m) |
| Deck Area | 1227.5 sq m |
| Main Spans | 2 |
| Year Built | 1930 |
Traffic
| Avg Daily Traffic | 100 (2025) |
| Truck Traffic | 3% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 723 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is on the National Register of Historic Places |
| Structure Number | L56104002+05001 |