S 80 over Shonkin Creek
Good Condition23 years old696 vehicles/day
Location
| State | Montana |
| County | Chouteau |
| Location | 1m E Fort Benton |
| Carries | S 80 |
| Crosses | Shonkin Creek |
| Coordinates | 47.81727, -110.63394 |
Condition Ratings
| Overall Condition | Good |
| Deck | 8 (Very Good) |
| Superstructure | 8 (Very Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 178.1 ft (54.3 m) |
| Max Span | 99.4 ft (30.3 m) |
| Deck Width | 37.4 ft (11.4 m) |
| Deck Area | 619.0 sq m |
| Main Spans | 2 |
| Year Built | 2003 |
Traffic
| Avg Daily Traffic | 696 (2023) |
| Truck Traffic | 11% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | November 2021 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | P00080004+01141 |