M-81 over N Branch Cass River
Fair Condition49 years old2,500 vehicles/day
Location
| State | Michigan |
| County | Tuscola |
| Location | 1.1 Mi W Of Sanilac Col |
| Carries | M-81 |
| Crosses | N Branch Cass River |
| Coordinates | 43.60182, -83.13662 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Box Beam - Multiple |
| Total Length | 74.8 ft (22.8 m) |
| Max Span | 74.8 ft (22.8 m) |
| Deck Width | 49.2 ft (15 m) |
| Deck Area | 342 sq m |
| Main Spans | 1 |
| Year Built | 1977 |
Traffic
| Avg Daily Traffic | 2,500 (2010) |
| Truck Traffic | 7% |
| 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 | 000000000010436 |