M-29 over Marine City Drain
Fair Condition84 years old3,717 vehicles/day
Location
| State | Michigan |
| County | St. Clair |
| Location | In Algonac |
| Carries | M-29 |
| Crosses | Marine City Drain |
| Coordinates | 42.63056, -82.51722 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 7 (Good) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Box Beam - Single/Spread |
| Total Length | 35.1 ft (10.7 m) |
| Max Span | 32.2 ft (9.8 m) |
| Deck Width | 56.8 ft (17.3 m) |
| Deck Area | 185.1 sq m |
| Main Spans | 1 |
| Year Built | 1942 (reconstructed 1997) |
Traffic
| Avg Daily Traffic | 3,717 (2007) |
| Truck Traffic | 5% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 323 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000009971 |