Old HWY 312 over Custer Coulee 171
Fair Condition98 years old2,775 vehicles/day
Location
| State | Montana |
| County | Yellowstone |
| Location | 2m E Huntley |
| Carries | Old HWY 312 |
| Crosses | Custer Coulee 171 |
| Coordinates | 45.92145, -108.25481 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 7 (Good) |
| Substructure | 5 (Fair) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 26.9 ft (8.2 m) |
| Max Span | 24.9 ft (7.6 m) |
| Deck Width | 33.5 ft (10.2 m) |
| Deck Area | 83.6 sq m |
| Main Spans | 1 |
| Year Built | 1928 (reconstructed 1939) |
Traffic
| Avg Daily Traffic | 2,775 (2023) |
| Truck Traffic | 1% |
| 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 | L56788016+01001 |