Us-31 NB over Pere Marquette River
Fair Condition37 years old2,498 vehicles/day
Location
| State | Michigan |
| County | Mason |
| Location | 3.6 Mi SE Of Ludington |
| Carries | Us-31 NB |
| Crosses | Pere Marquette River |
| Coordinates | 43.92732, -86.38382 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 7 (Good) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Steel Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 399.9 ft (121.9 m) |
| Max Span | 151.9 ft (46.3 m) |
| Deck Width | 47.9 ft (14.6 m) |
| Deck Area | 1779.7 sq m |
| Main Spans | 3 |
| Year Built | 1989 |
Traffic
| Avg Daily Traffic | 2,498 (2007) |
| Truck Traffic | 15% |
| 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 | 000000000006645 |