Old Us-31 over Pere Marquette River
Fair Condition101 years old7,076 vehicles/day
Location
| State | Michigan |
| County | Mason |
| Location | 1.9 Mi S Of Us-10 |
| Carries | Old Us-31 |
| Crosses | Pere Marquette River |
| Coordinates | 43.93260, -86.41727 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 7 (Good) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Box Beam - Multiple |
| Total Length | 75.1 ft (22.9 m) |
| Max Span | 74.1 ft (22.6 m) |
| Deck Width | 41.0 ft (12.5 m) |
| Deck Area | 286.2 sq m |
| Main Spans | 1 |
| Year Built | 1925 (reconstructed 2000) |
Traffic
| Avg Daily Traffic | 7,076 (2007) |
| Truck Traffic | 5% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 524 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000006637 |