M-136 over Black River
Fair Condition27 years old2,350 vehicles/day
Location
| State | Michigan |
| County | St. Clair |
| Location | 9.8 Mi SE Of M-19 |
| Carries | M-136 |
| Crosses | Black River |
| Coordinates | 43.05114, -82.59609 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 8 (Very Good) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 7 (Good) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Box Beam - Multiple |
| Total Length | 233.3 ft (71.1 m) |
| Max Span | 116.8 ft (35.6 m) |
| Deck Width | 46.6 ft (14.2 m) |
| Deck Area | 1009.6 sq m |
| Main Spans | 2 |
| Year Built | 1999 |
Traffic
| Avg Daily Traffic | 2,350 (2019) |
| Truck Traffic | 2% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | November 2023 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000009966 |