M-86 over Prairie River
Fair Condition27 years old4,618 vehicles/day
Location
| State | Michigan |
| County | St. Joseph |
| Location | 5.4 Mi SE Of M-60 |
| Carries | M-86 |
| Crosses | Prairie River |
| Coordinates | 41.92287, -85.54736 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 7 (Good) |
| Channel/Waterway | 5 (Fair) |
| Scour Critical | 7 — Countermeasures installed |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Box Beam - Multiple |
| Total Length | 88.9 ft (27.1 m) |
| Max Span | 88.9 ft (27.1 m) |
| Deck Width | 51.2 ft (15.6 m) |
| Deck Area | 422.8 sq m |
| Main Spans | 1 |
| Year Built | 1999 |
Traffic
| Avg Daily Traffic | 4,618 (2022) |
| Truck Traffic | 3% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 923 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000010282 |